Multi motion toothbrush (05-Jan-2010)

CROSS REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. application Ser. No. 11/414,908, filed May 1, 2006, now U.S. Pat. No. 7,340,794, which is a continuation of U.S. application Ser. No. 11/252,442, filed Oct. 18, 2005, now abandoned, which is a continuation of U.S. application Ser. No. 10/128,018, filed Apr. 22, 2002, now abandoned, which is a continuation-in-part of U.S. application Ser. No. 10/114,780, U.S. Publication No. 2003-0084526, filed Apr. 3, 2002, now abandoned, which is a continuation-in-part of U.S. application Ser. No. 10/027,594, filed Dec. 21, 2001, now abandoned, which is a continuation-in-part of U.S. application Ser. No. 09/993,167 filed Nov. 6, 2001, now U.S. Pat. No. 6,725,490, and U.S. application Ser. No. 10/036,613, U.S. Publication No. 2003-0084525, filed on Nov. 7, 2001, now abandoned, the substances of which are incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to the field of toothbrushes, and more particularly, the invention relates to the field of electrically powered toothbrushes.

BACKGROUND OF THE INVENTION

Most known electric toothbrushes utilize a single bristle carrier that is powered or otherwise driven by an electric motor incorporated in the toothbrush. The bristle carriers in these toothbrushes undergo a wide array of motions. For example, bristle carriers undergoing rotary motion are well known. Bristle carriers that reciprocate in a linear fashion within the plane of the brush are also known. And, bristle carriers that reciprocate in a linear fashion perpendicular to the plane of the brush are also known. Although satisfactory in certain respects, a need still exists for an improved powered toothbrush design.

Numerous attempts have been made to improve the design, efficiency, cleaning efficacy, simplicity, and/or commercial viability of electric toothbrushes. One approach has been the provision of multiple powered bristle carriers. Most artisans have grouped multiple sets of bristles along an end of a brush and incorporated a drive mechanism for simultaneously rotating each of the bristle sets, together. Exemplary designs include those disclosed in U.S. Pat. Nos. 3,242,516; 4,156,620; 4,845,795; 5,088,145; 5,020,179; 4,827,550; and 4,545,087, all of which are hereby incorporated by reference.

A related strategy is to group sets of bristles on multiple rotating bristle carriers, as disclosed in U.S. Pat. Nos. 2,140,307 and 5,170,525, both of which are herein incorporated by reference. Rather than rotating each individual bristle set about its center, i.e. the approach adopted in the previously noted patents, the designs described in the '307 and '525 patents rotate multiple groups of bristle sets about the center of a bristle carrier. Specifically, multiple groups of bristle sets are disposed on a circular bristle carrier and that bristle carrier, typically one of several, is rotated about its own axis.

U.S. Pat. No. 5,070,567, herein incorporated by reference, describes a design combining the two previously noted strategies. A rotating bristle carrier is provided along with multiple individually rotatable bristle sets. Although this design likely provides many of the advantages associated with each of its predecessors, the cleaning efficacy of spinning bristle sets, alone, is somewhat limited.

Yet another design is disclosed in U.S. Pat. No. 5,617,603, herein incorporated by reference. The '603 patent describes an assembly of “staggered swing” brushes. Apparently, the two bristle carriers move along a complex path within the plane of the toothbrush.

Although dual bristle carriers that undergo various combinations of movement have been disclosed in the prior art, there remains a need to provide an electric toothbrush with multiple bristle carriers that provides additional combinations of motion.

SUMMARY OF THE INVENTION

The present invention satisfies all of the previously noted objectives and provides, in one aspect, an electrically powered toothbrush comprising a body having an end, a head opposite from the end, and a neck extending between the end and the head. The body defines a hollow region within its interior. The toothbrush further includes an electrical motor and power source disposed in the hollow region of the body. The motor provides a rotating or oscillating drive shaft which has a distal end that is offset from a longitudinal axis of the drive shaft. The toothbrush includes a base pivotally secured to the head and positionable with respect to the head by a laterally extending pivot member. The base defines a receiving channel adapted to receive the distal end of the drive shaft. The toothbrush further includes a first bristle carrier and a second bristle carrier disposed on the head of the brush. The first bristle carrier is secured to the base. Upon rotation or oscillation of the drive shaft, the distal end of the drive shaft moves within the receiving channel of the base and causes the base and the first bristle carrier to pivot about the pivot member.

In another aspect, the present invention provides an electrically powered toothbrush comprising a body having a first end, a head opposite therefrom, and a neck extending between the end and the head. The body defines a hollow interior region. The toothbrush further includes an electrical motor and power source disposed in the hollow interior of the body. The motor provides a reciprocating drive shaft. The toothbrush further comprises a base pivotally secured to the head and positionable with respect to the head. The base includes an arm extending from the base which is engaged with the drive shaft. The toothbrush also comprises a first bristle carrier disposed on and secured to the base, and a second bristle carrier disposed on the head. Upon reciprocation of the drive shaft, the distal end of the drive shaft moves the arm of the base and causes the base and the first bristle carrier to pivot.

In yet another aspect, the present invention provides an electrically powered toothbrush comprising a body having a first end, a head opposite that end, and a neck extending between the end and the body. The body defines a hollow interior region within the body. The head defines a second hollow interior region within the head. And, the head has an inclined ramp surface along an outer surface of the head. The electrically powered toothbrush also comprises an electrical motor and power source disposed in the hollow region of the body. The motor provides a rotating or oscillating drive shaft. The shaft has a distal end and is offset from a longitudinal axis of the shaft. The toothbrush also comprises a positionable base moveably disposed on the head and in contact with the ramp surface. The base includes an outwardly extending arm that extends into the second hollow interior region of the head. The arm provides a channel within which is disposed the distal end of the drive shaft. The toothbrush also comprises first and second bristle carriers in which the first bristle carrier is secured to the positionable base. Upon rotation or oscillation of the drive shaft, the distal end of the drive shaft moves within the channel provided in the arm of the base. That movement causes the base and the first bristle carrier to move along the ramp surface.

In still another aspect, the present invention provides an electrically powered toothbrush comprising a body having a first end and a head opposite from that end and a neck extending between the end and the head. The body defines a hollow interior region within the body. The head defines a second hollow interior region within the head. The head includes an inclined ramp surface along an outer surface of the head. The toothbrush also comprises an electrical motor and power source disposed in the hollow interior region within the body. The motor provides a reciprocating drive shaft which has a distal end that is offset from a longitudinal axis of the shaft. The toothbrush also comprises a positionable base movably disposed on the head and in contact with the ramp surface. The base includes an outwardly extending arm that extends into the second hollow interior region of the head. The arm defines an aperture within which is disposed the distal end of the shaft. The toothbrush also comprises a first bristle carrier disposed on and secured to the base, and a second bristle carrier disposed on the head. Upon reciprocation of the drive shaft, the distal end of the drive shaft moves the arm of the base and causes the base and the first bristle carrier to move along the ramp surface.

In yet another aspect, the present invention provides an electrically powered toothbrush comprising a body having a first end, a head opposite from that end, and a neck extending between the end and the head. The body defines a hollow interior region. The head defines a second hollow interior region within the head. The head also includes an elongated aperture along an outer surface of the head. The toothbrush also comprises an electrical motor and power source disposed in the hollow region of the body. The motor provides a rotating or oscillating drive shaft which has a distal end. The toothbrush also comprises a screw gear engaged to the distal end of the drive shaft. The screw gear defines a channel along an outer surface of the screw gear. The toothbrush also comprises a positionable base movably disposed on the head and positioned over the elongated aperture defined in the head. The base includes an outwardly extending guide member disposed in and contacting the channel of the screw gear. The guide member extends through the elongated aperture defined along the head. The toothbrush additionally comprises a first bristle carrier disposed on and secured to the base. And, the toothbrush also includes a second bristle carrier disposed on the head. Upon rotation or oscillation of the drive shaft, the screw gear is rotated thereby causing displacement of the guide member, the base, and the first bristle carrier along the outer surface of the head.

In still another aspect, the present invention provides an electrically powered toothbrush comprising a body having an end, a head opposite from that end, and a neck extending between the end and the head. The body defines a hollow interior region within the body. And the head defines a second hollow interior region within the head. The head also provides an elongated aperture along an outer surface of the head. The toothbrush also comprises an electrical motor and power source disposed in the hollow interior region within the body. The motor provides a reciprocating drive shaft which has a distal end. The toothbrush also comprises a positionable base movably disposed on the head and positioned over the elongated aperture defined in the head. The base includes an outwardly extending guide member projecting through the elongated aperture in the head. The guide member engages the distal end of the drive shaft. The toothbrush also comprises a first bristle carrier disposed on and secured to the base. And, the toothbrush includes a second bristle carrier disposed on the head. Upon reciprocation of the drive shaft, the distal end of the drive shaft moves the base and the first bristle carrier along the head.

In yet another aspect, the present invention provides an electrically powered toothbrush comprising a body having a first end, a head opposite that end, and a neck extending between the first end and the head. The body defines a hollow interior region within the body. The head defines a second hollow interior region within the head. The head also defines an elongated aperture along an outer surface of the head. The toothbrush additionally comprises an electrical motor and power source disposed in the hollow interior region within the body. The motor provides a rotating or oscillating drive shaft. The toothbrush also comprises a screw gear engaged with the drive shaft. The screw gear provides a channel along its outer surface. The toothbrush also comprises a base movably disposed on the head and positionable with respect to the head. The base includes an outwardly extending guide member projecting through the elongated aperture and into the second hollow interior region within the head. The guide member is disposed in and contacts the screw gear channel. The toothbrush also comprises first and second bristle carriers disposed on the head. The second bristle carrier is secured to the base. Upon rotation or oscillation of the drive shaft, the screw gear is rotated which causes displacement of the guide member, the base, and the second bristle carrier.

In yet another aspect, the present invention provides an electrically powered toothbrush comprising a body having a first end, a head opposite that end, and a neck extending between the end and the head. The body defines a hollow interior region and the head defines a second hollow interior region. The head also provides an elongated aperture along its outer surface. The toothbrush additionally comprises an electrical motor and power source disposed in the hollow region of the body. The motor provides a reciprocating drive shaft. A toothbrush additionally comprises a positionable base movably disposed on the head. The base includes an outwardly extending guide member that projects through the elongated aperture defined along the head. The guide member extends into the second hollow interior region of the head. The guide member engages the drive shaft. The toothbrush also comprises a first bristle carrier disposed on the head and a second bristle carrier disposed on and secured to the base. Upon reciprocation of the drive shaft, the drive shaft moves the guide member of the base and causes the base and the second bristle carrier to move.

In another aspect, the present invention provides an electrically powered toothbrush comprising a body having a first end, a head opposite that end, and a neck extending between the first end and the head. The body defines a hollow interior region, and the head defines a second hollow interior region and includes internal support members that define a camming aperture within the second hollow interior region of the head. The toothbrush also comprises an electrical motor and power source disposed in the hollow interior region of the body. The motor provides a rotating or oscillating drive shaft. The toothbrush also comprises a screw gear engaged to the distal end of the drive shaft. The screw gear defines a channel along its outer surface. The toothbrush also comprises a positionable base movably disposed on the head. The base includes an outwardly extending arm projecting into the second hollow interior region of the head. The arm includes a laterally extending guide member disposed in and engaging the camming aperture defined in the internal support members of the head. The toothbrush also comprises a linkage assembly having a guide member disposed in the channel of the screw gear. The linkage assembly engages the screw gear to the arm of the base. The toothbrush also comprises a first bristle carrier disposed on and secured to the base. And, the toothbrush comprises a second bristle carrier disposed on the head and between the first bristle carrier and the first end of the body. Upon rotation or oscillation of the drive shaft, the screw gear is rotated thereby causing displacement of the guide member, the linkage assembly, the base, and the first bristle carrier.

In yet another aspect, the present invention provides an electrically powered toothbrush comprising a body having an end, a head opposite that end, and a neck extending between the end and the head. The body defines a hollow interior region within the body, and the head defines a second hollow interior region within the head. The head also includes internal support members that define a camming aperture within the head. The toothbrush additionally comprises an electrical motor and power source disposed in the hollow interior region within the body. The motor provides a reciprocating drive shaft. The shaft has a distal end. The toothbrush also comprises a positionable base movably disposed on the head and including an outwardly extending arm projecting into the second hollow interior region of the head. The arm includes a laterally extending guide member disposed in and engaging the camming aperture defined in the internal support members of the head. The toothbrush also comprises a linkage assembly engaging the end of the drive shaft to the arm of the base. The toothbrush also comprises first and second bristle carriers disposed on the head. The first bristle carrier is secured to the base. Upon reciprocation of the drive shaft, the distal end of the drive shaft moves the arm of the base and causes the base and the first bristle carrier to move.

In yet another aspect, the present invention provides an electrically powered toothbrush comprising a body having an end, a head opposite the end, and a neck extending between the end and the head. The body defines a hollow interior region within the body, and the head defines a second hollow interior region within the head. The head additionally includes internal support members that define a camming aperture within the second interior region of the head. The toothbrush also comprises an electrical motor and power source disposed in the hollow interior region within the body. The motor provides a reciprocating drive shaft. The toothbrush also comprises a positionable base movably disposed on the head. The base includes an outwardly extending arm projecting into the second hollow interior region of the head. The arm includes a laterally extending guide member disposed in and engaging the camming aperture defined in the internal support members of the head. The toothbrush also comprises a linkage assembly engaging the drive shaft to the arm of the base. The toothbrush also comprises first and second bristle carriers disposed on the head. The second bristle carrier is secured to the base. Upon reciprocation of the drive shaft, the drive shaft moves the arm of the base and causes the base and the second bristle carrier to move.

In a still further aspect, the present invention provides an electrically powered toothbrush comprising a body having an end, a head opposite from that end, and a neck extending between the end and the head. The body defines a hollow interior region, and the head defines a second hollow interior region. The head also includes an elongated aperture extending along an outer surface of the head. The toothbrush additionally comprises an electrical motor and power source disposed in the hollow region within the body. The motor provides a rotating or oscillating drive shaft. The toothbrush also comprises a screw gear engaged to the drive shaft. The screw gear defines a channel along its outer surface. The toothbrush also comprises a positionable base movably disposed on the head and positioned over the elongated aperture defined in the head. The base includes an outwardly extending guide member extending through the elongated aperture defined in the head and disposed in the second hollow region of the head. The toothbrush also comprises a linkage assembly disposed in the second hollow region within the head. The linkage assembly has a first end disposed in and contacting the channel of the screw gear, and a second end engaged to the guide member of the base. The toothbrush also comprises first and second bristle carriers disposed on the head. The first bristle carrier is secured to the base. Upon rotation or oscillation of the drive shaft, the screw gear is rotated which causes displacement of the linkage assembly, the guide member, the base and the first bristle carrier along the outer surface of the head.

In yet another aspect, the present invention provides an electrically powered toothbrush comprising a body having a head, an end opposite from the head, and a neck extending between the head and end. The body defines a first hollow interior region, and the head defines a second hollow interior region. The head also provides an outwardly directed surface. The toothbrush also comprises a motor and power source disposed in the first interior region. The motor provides a powered drive shaft. The toothbrush also comprises a plurality of bristle carriers disposed on the outwardly directed surface of the head. The toothbrush additionally comprises a base movably disposed on the outwardly directed surface of the head and engaged to the drive shaft of the motor. At least one of the bristle carriers is engaged with the base. Upon operation of the motor, the base and at least one of the bristle carriers engaged therewith are moved along the head. The head defines an elongated aperture in the outwardly directed surface of the head. The orientation or shape of this aperture governs the movement of the base and the bristle carriers engaged therewith.

In another aspect, the present invention provides an electrically powered toothbrush comprising a body with a head, an end opposite the head, and a neck extending between the head and end. The body defines a first hollow interior region, and the head defines a second hollow interior region. The head also provides an outwardly directed surface. The toothbrush also comprises a motor and power source disposed in the first interior region, the motor providing a powered drive shaft. The toothbrush additionally comprises a plurality of bristle carriers disposed on the outwardly directed surface of the head. The toothbrush further comprises a base movably disposed on the outwardly directed surface of the head and engaged to the drive shaft. At least one of the collection of bristle carriers is engaged with the base. Upon operation of the motor, the base and at least one of the plurality of the bristle carriers engaged therewith are moved along the head. The head defines an inclined ramp surface within the outwardly directed surface of the head which governs the movement of the base and at least one of the bristle carriers of the collection engaged with the base.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention may take form in various components and arrangements of components, and in various techniques, methods, or procedures and arrangements of steps. The referenced drawings are only for purposes of illustrating preferred embodiments, they are not necessarily to scale, and are not to be construed as limiting the present invention.

It is believed that the present invention will be better understood from the following description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of a preferred embodiment toothbrush in accordance with the present invention illustrating various planes and their orientation with respect to the toothbrush;

FIG. 2 is a front elevational view illustrating the bristle carriers of a preferred embodiment toothbrush in accordance with the present invention;

FIG. 2A is a detail of a first bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 2B is a detail of a first bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 2C is a detail of a first bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 2D is a detail of a first bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 2E is a detail of a first bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 2F is a detail of a second bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 2G is a detail of a second bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 2H is a detail of a second bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 2I is a detail of a second bristle carrier of the toothbrush shown in FIG. 2 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 3 is a front elevational view illustrating the bristle carriers of a preferred embodiment toothbrush in accordance with the present invention;

FIG. 3A is a detail of a first bristle carrier of the toothbrush shown in FIG. 3 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 3B is a detail of a first bristle carrier of the toothbrush shown in FIG. 3 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 3C is a detail of a first bristle carrier of the toothbrush shown in FIG. 3 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 3D is a detail of a first bristle carrier of the toothbrush shown in FIG. 3 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 3E is a detail of a second bristle carrier of the toothbrush shown in FIG. 3 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 3F is a detail of a second bristle carrier of the toothbrush shown in FIG. 3 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 3G is a detail of a second bristle carrier of the toothbrush shown in FIG. 3 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 3H is a detail of a second bristle carrier of the toothbrush shown in FIG. 3 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 4 is a front elevational view of a preferred embodiment toothbrush in accordance with the present invention;

FIG. 4A is a detail of a first bristle carrier of the toothbrush shown in FIG. 4 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 4B is a detail of a second bristle carrier of the toothbrush shown in FIG. 4 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 4C is a detail of a second bristle carrier of the toothbrush shown in FIG. 4 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 4D is a detail of a second bristle carrier of the toothbrush shown in FIG. 4 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 4E is a detail of a second bristle carrier of the toothbrush shown in FIG. 4 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 5 is a front elevational view of a preferred embodiment toothbrush in accordance with the present invention;

FIG. 5A is a detail of a first bristle carrier of the toothbrush shown in FIG. 5 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 5B is a detail of a first bristle carrier of the toothbrush shown in FIG. 5 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 5C is a detail of a first bristle carrier of the toothbrush shown in FIG. 5 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 5D is a detail of a second bristle carrier of the toothbrush shown in FIG. 5 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 5E is a detail of a second bristle carrier of the toothbrush shown in FIG. 5 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 5F is a detail of a second bristle carrier of the toothbrush shown in FIG. 5 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 5G is a detail of a second bristle carrier of the toothbrush shown in FIG. 5 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 6 is a front elevational view of a preferred embodiment toothbrush in accordance with the present invention;

FIG. 6A is a detail of a first bristle carrier of the toothbrush shown in FIG. 6 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 6B is a detail of a second bristle carrier of the toothbrush shown in FIG. 6 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 6C is a detail of a second bristle carrier of the toothbrush shown in FIG. 6 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 6D is a detail of a second bristle carrier of the toothbrush shown in FIG. 6 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 6E is a detail of a second bristle carrier of the toothbrush shown in FIG. 6 illustrating the bristle carrier undergoing a certain type of motion;

FIG. 7A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention, illustrating a certain mechanism in a first position for imparting motion to a bristle carrier;

FIG. 7B is a schematic view of the preferred embodiment toothbrush shown in FIG. 7A, illustrating the mechanism in a different position for imparting motion to the bristle carrier;

FIG. 7C is a schematic cross-sectional view taken along line 7C-7C in FIG. 7A;

FIG. 7D is a schematic cross-sectional view taken along line 7D-7D in FIG. 7B;

FIG. 8A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention, illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 8B is a schematic cross-sectional view taken along line 8B-8B in FIG. 8A;

FIG. 9A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention, illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 9B is a schematic cross-sectional view taken along line 9B-9B in FIG. 9A;

FIG. 10A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 10B is a partial cross-section of the preferred embodiment mechanism illustrated in FIG. 10A;

FIG. 10C is a perspective view of a first bristle carrier of the mechanism illustrated in FIGS. 10A and 10B;

FIG. 10D is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 10E is a schematic cross-section of the mechanism illustrated in FIG. 10D;

FIG. 11A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 11B is a schematic cross-section of the mechanism illustrated in FIG. 11A;

FIG. 11C is a cross-section taken along line 11C in FIG. 11B;

FIG. 11D is a perspective view of a first bristle carrier of the mechanism shown in FIGS. 11A to 11C;

FIG. 11E is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 11F is a schematic cross-sectional view of the mechanism illustrated in FIG. 11E;

FIG. 11G is a cross-section taken along line 11G in FIG. 11F;

FIG. 12A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 12B is a schematic cross-section of the mechanism illustrated in FIG. 12A;

FIG. 12C is a partial exploded view of the first bristle carrier and its engagement with the brush head as shown in FIGS. 12A to 12B;

FIG. 12D is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 12E is a schematic cross-sectional view of the mechanism shown in FIG. 12D;

FIG. 13A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 13B is a schematic cross-section of the mechanism shown in FIG. 13A;

FIG. 13C is a cross-sectional view taken along line 13C in FIG. 13B;

FIG. 13D is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 13E is a schematic cross-sectional view of the mechanism shown in FIG. 13D;

FIG. 13F is a cross-sectional view taken along line 13F in FIG. 13E;

FIG. 14A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 14B is a schematic cross-sectional view of the mechanism shown in FIG. 14A;

FIG. 14C is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 14D is a schematic cross-sectional view of the mechanism shown in FIG. 14C;

FIG. 15A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 15B is a schematic cross-sectional view of the mechanism shown in FIG. 15A;

FIG. 15C is a cross-sectional view taken along line 15C in 15B;

FIG. 15D is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 15E is a schematic cross-sectional view of the mechanism shown in FIG. 15D;

FIG. 15F is a cross-sectional view taken along line 15F in FIG. 15E;

FIG. 16A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 16B is a schematic cross-sectional view of the mechanism illustrated in FIG. 16A;

FIG. 16C is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 16D is a schematic cross-sectional view of the mechanism shown in FIG. 16C;

FIG. 17A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 17B is a schematic cross-sectional view of the mechanism shown in FIG. 17A;

FIG. 17C is a cross-sectional view taken along line 17C in FIG. 17B;

FIG. 17D is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 17E is a schematic cross-sectional view of the mechanism shown in FIG. 17D;

FIG. 17F is a cross-sectional view taken along line 17F in FIG. 17E; and

FIG. 17G is an exploded view of the second bristle carrier and certain components of the drive train illustrated in FIGS. 17D to 17F;

FIG. 18A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 18B is a schematic cross-sectional view of the mechanism shown in FIG. 18A;

FIG. 18C is a cross-sectional view taken along line 18C in FIG. 18B;

FIG. 18D is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 18E is a schematic cross-sectional view of the mechanism illustrated in FIG. 18D;

FIG. 18F is a cross-sectional view taken along line 18F in FIG. 18E;

FIG. 18G is an exploded perspective view of the mechanism shown in FIGS. 18D to 18F;

FIG. 19A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 19B is a schematic cross-sectional view of the mechanism shown in FIG. 19A;

FIG. 19C is a cross-sectional view taken along line 19C in FIG. 19B;

FIG. 19D is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 19E is a schematic cross-sectional view of the mechanism illustrated in FIG. 19D;

FIG. 19F is a cross-sectional view taken along line 19F in FIG. 19E;

FIG. 19G is a partial exploded view of the mechanism illustrated in FIGS. 19D to 19F;

FIG. 20A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 20B is a schematic cross-sectional view of the mechanism shown in FIG. 20A;

FIG. 20C is a cross-sectional view taken along line 20C in FIG. 20B;

FIG. 20D is a partial exploded view of the mechanism depicted in FIGS. 20A to 20C;

FIG. 21A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 21B is a schematic cross-sectional view of the mechanism illustrated in FIG. 21A;

FIG. 21C is a cross-sectional view taken along line 21C in FIG. 21B;

FIG. 22A is a schematic view of a preferred embodiment toothbrush in accordance with the present invention illustrating another mechanism for imparting motion to a bristle carrier;

FIG. 22B is a schematic cross-sectional view of the mechanism shown in FIG. 22A; and

FIG. 22C is a cross-sectional view taken along line 22C in FIG. 22B.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As will be appreciated, the present invention is directed to electric toothbrushes, including electric toothbrushes having replaceable brush head ends, replaceable bristle carriers and electric toothbrushes having multiple bristle carriers. In particular, the present invention is directed to an electric toothbrush with two bristle carriers, each of which is driven by an electric motor incorporated within the toothbrush body. As described in greater detail herein, it is contemplated that two or more electric motors could be utilized in the present invention toothbrush.

Specifically, the present invention can be used in conjunction with electric toothbrushes, brush heads, and bristle carriers that include shafts that rotate, oscillate, or reciprocate (as well as combinations thereof) to impart motion to the first and second bristle carriers. In addition, the present invention can be used in combination with electric toothbrushes, brush heads, and bristle carriers where the shaft is operatively connected to both the first and second bristle carriers or only one of the bristle carriers. In the latter instance, the bristle carriers are themselves interconnected so that a motion is imparted to the bristle carrier that is not directly coupled to the shaft.

Before describing the various preferred embodiment toothbrushes and associated drive mechanisms, it is instructive to define the various types of motions referenced herein. As used herein, the term “angular motion” refers to any angular displacement. “Linear motion” is movement along a straight or substantially straight, line or direction. “Primarily linear motion” is described below. “Curvilinear motion” is movement that is neither completely linear nor completely angular but is a combination of the two (e.g., curvilinear). These motions can be constant or periodic. Constant motion refers to motion that does not change direction or path (i.e., is unidirectional). Periodic motion refers to motion that reverses direction or path. Constant angular motion (i.e., motion that extends through 360 degrees or more) that is substantially in the form of a circle is referred to as rotary motion. Periodic angular motion is motion that extends through less than 360 degrees and is referred to as oscillating motion. Curvilinear motions can also be either constant (i.e., unidirectional) or periodic (i.e., reverses direction). Periodic linear motion is referred to as “reciprocation”.

The above-described motions can also occur along one or more axes of a bristle carrier. Accordingly, motion is described herein as being either one, two, or three dimensional motion depending upon the number of axial coordinates required to describe the position of a bristle carrier during its movement. The axes, X, Y, and Z, are shown in FIG. 1. One dimensional motion is motion that can be described by a single coordinate (e.g., X, Y, or Z coordinates). Typically, only linear motion can be one dimensional. For example, periodic linear motion substantially along only the Y axis is one dimensional motion (referred to herein as a “pulsing motion”). Two dimensional motion is movement by a bristle carrier that requires two coordinates (e.g., X and Y coordinates) to describe the path of travel of the bristle carrier. Angular motion that occurs in a single plane is two dimensional motion. Three dimensional motion is movement by a bristle carrier that requires three coordinates (e.g., X, Y, and Z coordinates) to describe the path of travel of the bristle carrier. An example of three dimensional motion is movement by a bristle carrier in the path of a helix.

FIG. 1 is a perspective view of a preferred embodiment toothbrush 2 in accordance with the present invention. The toothbrush 2 comprises an elongated body 10 having a handle 30, a head 50, and a neck 40 extending between the handle 30 and the head 50. A switch 20 is provided or made accessible along the outer region of the body 10. As will be appreciated, the switch 20 actuates an electrical motor contained within the body 10 of toothbrush 2. The motor (not shown) and a drive mechanism as described herein (not shown) provide a powered drive for one or more bristle carriers disposed near a distal end of the toothbrush. Specifically, the toothbrush 2 further includes a first bristle carrier 60 and a second bristle carrier 70 located adjacent a distal-most end 52. As described in greater detail herein, upon activation of the drive mechanism, the first and second bristle carriers undergo a particular combination of motions. The motions are best described in terms of the axes X, Y, and Z and the planes which contain these axes.

The X axis is generally referred to herein as the longitudinal axis and generally extends along a longitudinal or lengthwise dimension (as seen from the top planar view of the toothbrush) of the toothbrush head or the bristle carrier. The longitudinal axis of the toothbrush head or bristle carrier may coincide with the longitudinal axes of the toothbrush neck and/or handle, although it need not do so as for example where the toothbrush head is angled with respect to either the toothbrush neck or handle. For example, a longitudinal axis is an axis passing through the longest dimension of the toothbrush head. The Y axis is transverse to the X axis and generally bisects the toothbrush head into its left and right halves. The Z axis is orthogonal or perpendicular to the X and Y axes.

Plane X contains the X axis and is generally referred to herein as the plane of the toothbrush or the plane of the toothbrush head. This plane generally extends along the longitudinal dimension of the toothbrush or the toothbrush head. The Y plane contains the Y axis and extends through the toothbrush and is perpendicular to the X plane. The Y plane either bisects the toothbrush or is parallel to a plane that does. The Z plane is perpendicular to both the X plane and the Y plane.

Furthermore, it is useful to address the terminology used in describing the preferred embodiment toothbrushes, bristle carriers, and the various drive mechanisms. As used herein, the term “forward” refers to the direction from the handle to the head while the term “rearward” refers to the direction from the head to the handle. A longitudinal direction is a direction that generally corresponds to a longitudinal or X axis but which may not lie in the same plane as the axis. For example, the longitudinal axes of a shaft and a bristle carrier may not extend in the same plane but generally extend in the same direction from a top planar view. Similarly, a neck and head that are angled with respect to each other may not have longitudinal axes that extend in the same plane, but do have axes which extend in the same general longitudinal direction from a top planar view. Many of the preferred embodiment electric toothbrushes typically have an elongated head with a longitudinal axis passing through the longest dimension thereof. This axis typically extends in the same general direction as the longitudinal axes of the toothbrush neck and/or shaft. This axis is generally referred to as the longitudinal axis of the toothbrush. By the phrase “same general direction,” some angular deviation is contemplated between the axes. Various references are also made herein to the “plane of the toothbrush.” As will be understood, this is generally the plane within which extends the longitudinal axis of the toothbrush head.

And, as described herein, the first bristle carrier is the bristle carrier that is located at the distal-most end of the toothbrush. The second bristle carrier is the next bristle carrier positioned alongside or proximate to the first bristle carrier and rearward therefrom. A third bristle carrier is proximate the second bristle carrier and is positioned rearward of the second bristle carrier. A fourth bristle carrier is rearward of the third and so on.

Generally, the preferred embodiment toothbrushes according to the present invention comprise an elongated hollow body that retains an electrically powered motor and drive mechanism that is used to drive two or more moveable bristle carriers. The elongated hollow body also includes an interior chamber for containing one or more batteries for powering the motor. And, one or more switches are provided along the outer region of the body for activating the motor and drive mechanism. As will be appreciated, a removable end cap is provided to enclose the interior chamber and provide a seal against external agents for the components inside the toothbrush body. As described in detail herein, the preferred embodiment toothbrushes comprise two or more movable bristle carriers. Each of the bristle carriers undergoes particular types of motion and the resulting combinations of movements provide unique cleaning efficacy.

As noted, the preferred embodiment electric toothbrushes comprise a plurality of bristle carriers that are driven by an electric motor and drive mechanism incorporated in the toothbrush. Preferably, these toothbrushes utilize two bristle carriers, each undergoing motion different than the motion of the other bristle carrier. Specifically, there are numerous categories of combinations of movements of the two bristle carriers which are encompassed by the present invention. Each of these categories involves various specific types of combinations of movement as follows.

A first category of combinations of movements of the two bristle carriers is that in which the first or distal-most bristle carrier moves in a linear fashion, and the second bristle carrier moves in a primarily linear fashion. Specifically, this category involves motion in which the first bristle carrier undergoes one dimensional periodic, i.e. repeated, linear movement in combination with two or three dimensional periodic primarily linear movement by the second bristle carrier. It will be appreciated that the reference to “primarily linear” refers to movement that is in two or three dimensions and not entirely linear in nature. Movement that is primarily linear is movement that is best characterized as non-linear movement, however movement that is substantially along a single axis, line or direction. That is, primarily linear motion is movement that is generally along a single line or direction. This motion may include deviation from the line or direction of movement, however such motion is substantially linear.

This combination of movements may be further defined as involving one of the following specific types of movement by the first bristle carrier and one of the following specific types of movement by the second bristle carrier.

The first bristle carrier may reciprocate along a single axis or line in the X plane of the toothbrush head or a plane that is generally parallel to the plane of the toothbrush head, and in a direction parallel to the longitudinal axis of the toothbrush head. Or, the first bristle carrier may reciprocate along a single axis or line in the X plane of the toothbrush head or a plane generally parallel to the plane of the toothbrush head, and in a direction perpendicular to the longitudinal axis of the toothbrush head (and so the first bristle carrier moves in a “side-to-side” fashion). Alternately, the first bristle carrier may reciprocate along a single axis in the X plane of the toothbrush head or a plane generally parallel to the X plane of the toothbrush head, and in a direction other than parallel or perpendicular to the longitudinal axis of the toothbrush head. That is, the first bristle carrier may reciprocate along an axis that extends at an acute angle with respect to the longitudinal axis of the toothbrush head. Instead, the first bristle carrier may reciprocate along a single axis in a plane perpendicular to the X plane of the toothbrush head (and so, moving in an “up and down” or “pulsing” fashion). In other words, the first bristle carrier may move in a direction aligned with the Y axis of the toothbrush head. Yet another motion is that in which the first bristle carrier may reciprocate along a single axis in a plane other than one that is parallel or perpendicular to the X plane of the toothbrush head. All of these motions of the first bristle carrier are one dimensional or linear.

The second bristle carrier may undergo repeated motion that is primarily linear within the X plane of the toothbrush head or a plane generally parallel to the X plane of the toothbrush head. Or, the second bristle carrier may undergo repeated motion that is primarily linear and in a plane that is perpendicular to the X plane of the toothbrush head (and so, the second bristle carrier would resemble a “pulsing” type motion). Or, the second bristle carrier may undergo repeated motion that is primarily linear in a plane other than one that is parallel or perpendicular to the plane of the toothbrush head. Alternatively, the second bristle carrier may undergo repeated motion that is primarily linear and non-planar (hence, the designation that motion of the second bristle carrier is in three dimensions). This motion of the second bristle carrier, although non-planar, can be characterized by primarily extending within a plane that is: (i) within the plane of the toothbrush head or a plane that is generally parallel to the plane of the toothbrush head; (ii) perpendicular to the plane of the toothbrush head; or (iii) different than either the plane of the toothbrush head or a plane perpendicular thereto.

It will be understood that in this category of movement combinations, any of the previously described movements of the first bristle carrier may be utilized in conjunction with any of the previously described movements of the second bristle carrier.

FIG. 2 illustrates a preferred embodiment toothbrush A having a pair of bristle carriers as previously described. FIGS. 2A to 2I illustrate the various combinations of movements of these bristle carriers as previously described. Specifically, FIG. 2 illustrates a preferred embodiment toothbrush A including a body 110 having a neck 140 and a head 150. The toothbrush A further includes a first bristle carrier 160 and a second bristle carrier 170 disposed proximate to a distal-most end 152 of the head 150. The first bristle carrier 160 may be configured to move in a variety of fashions as previously noted. Specifically, referring to FIGS. 2A to 2E these motions are as follows.

FIG. 2A illustrates that the first bristle carrier 160 may reciprocate along a single axis or line in the plane of the toothbrush head such as plane X as shown in FIG. 1, or a plane that is generally parallel to the plane of the toothbrush head, and in a direction parallel to the longitudinal axis L of the toothbrush. FIG. 2B illustrates another motion in which the first bristle carrier 160 reciprocates along a single axis or line in the plane of the toothbrush head or a plane generally parallel to the plane of the toothbrush head, and in a direction perpendicular to the longitudinal axis of the toothbrush. FIG. 2B illustrates the first bristle carrier 160 moving in a “side-to-side” fashion.

FIG. 2C illustrates the first bristle carrier 160 reciprocating along a single axis in the plane of the toothbrush head or a plane generally parallel to the plane of the toothbrush head, and in a direction other than parallel or perpendicular to the longitudinal axis of the toothbrush. That is, FIG. 2C illustrates the first bristle carrier 160 reciprocating along an axis that extends at an acute angle with respect to the longitudinal axis of the toothbrush. FIG. 2D illustrates the first bristle carrier 160 reciprocating along a single axis in a plane perpendicular to the plane of the toothbrush head, such as plane Y as shown in FIG. 1, and generally perpendicular to the longitudinal axis of the toothbrush, and so moving in an up and down or pulsing fashion. FIG. 2E illustrates the first bristle carrier 160 moving or reciprocating along a single axis in a plane other than one that is parallel or perpendicular to the plane of the toothbrush head. All of these motions of the first bristle carrier 160 are one dimensional or linear.

FIGS. 2F to 2I illustrate various motions that the second bristle carrier 170 may undergo. FIG. 2F illustrates the second bristle carrier 170 undergoing motion that is primarily linear and so, not one dimensional, within the plane of the toothbrush head or a plane generally parallel to the plane of the toothbrush head. FIG. 2G illustrates the second bristle carrier 170 undergoing repeated motion that is primarily linear and in a plane that is perpendicular to the plane of the toothbrush head, such as plane Y shown in FIG. 1. And so, the second bristle carrier 170 is moving in a motion that resembles a pulsing type motion. FIG. 2H illustrates the second bristle carrier 170 undergoing repeated motion that is primarily linear in a plane other than one that is parallel or perpendicular to the plane of the toothbrush head. FIG. 2I illustrates the second bristle carrier 170 undergoing repeated motion that is primarily linear, however, non-planar, and hence three dimensional.

The preferred embodiment toothbrush A may be configured such that the first bristle carrier 160 may undergo any of the motions depicted in FIGS. 2A to 2E, in combination with the second bristle carrier 170 undergoing any of the motions depicted in FIGS. 2F to 2I.

FIGS. 14A to 14D illustrate two preferred embodiment mechanisms for achieving the motion illustrated in FIG. 2A. FIGS. 14A and 14B illustrate a mechanism utilizing a rotating or oscillating drive shaft, such as from a motor or drive output. FIG. 14C and FIG. 14D illustrate drive mechanisms for use with a reciprocating powered drive shaft. Specifically, FIGS. 14A and 14B illustrate a preferred embodiment toothbrush Q having a body 1810, a neck 1840, and a head 1850. Disposed along the head 1850 is a first bristle carrier 1860 and a second bristle carrier 1870. The body 1810 houses a rotating or oscillating drive shaft 1820 having a distal end 1822. A gear member 1830 is engaged or otherwise secured to the distal end 1822 of the shaft 1820. The gear member 1830 defines a channel 1832 within which a tracking or guide member 1866 is positioned. The first bristle carrier 1860 includes a base 1862, a plate 1864, and the tracking member 1866 extending from the plate 1864. The base may be unitary and not utilize a plate component. Accordingly, the base would include the tracking or guide member. The tracking member 1866 is generally disposed within the channel 1832 of the gear member 1830. The head 1850 defines a guide channel or elongated aperture 1854 along an upwardly directed surface of the head 1850. Upon rotation or oscillation of the shaft 1820, the gear member 1830 is similarly moved. As the gear member 1830 is rotated or oscillated, the tracking member 1866 is linearly displaced as it moves within the channel 1832. Thus, the plate 1864 and the base 1862 of the first bristle carrier 1860 are laterally displaced within the head 1850. This in turn moves the first bristle carrier 1860. The guide channel 1854 defined along an upwardly directed surface of the head 1850 further governs the path of motion of the first bristle carrier 1860.

FIGS. 14C and 14D illustrate a preferred embodiment toothbrush R in accordance with the present invention. This toothbrush R achieves the motion depicted in FIG. 2A. FIGS. 14C and 14D illustrate the toothbrush R having a body 1910, including a neck 1940, and a head 1950. Disposed along the head 1950 is a distal-most or first bristle carrier 1960 and a second bristle carrier 1970. The body 1910 encloses a reciprocating shaft 1924 having a distal end 1926. The first bristle carrier 1960 includes a base component 1962, a plate 1964, and a retention member 1966 disposed along the underside of the plate 1964. The distal end 1926 of the shaft 1924 is engaged with the retention member 1966. Defined along an upwardly directed surface of the head 1950, is a guide channel or elongated aperture 1954. The base is positionable and moveably disposed on the head. The base is positioned over the guide channel. The base may be of a unitary construction and not utilize a separate retention member component. Upon operation or reciprocation of the shaft 1924, the first bristle carrier 1960 is linearly displaced due to motion by the retention member 1966, the plate 1964, and the base 1962. The guide channel 1954 ensures or facilitates linear movement in the desired direction.

FIGS. 8A-8B illustrate a mechanism for achieving motion shown in FIG. 2B. As previously noted, that motion is the first bristle carrier moving in a “side-to-side” fashion. The mechanism of FIG. 8A-8B is described in greater detail herein.

FIGS. 15A to 15F illustrate two mechanisms for achieving the motion shown in FIG. 2C. FIGS. 15A to 15C illustrate a mechanism for achieving motion using a rotating or oscillating drive shaft. FIGS. 15D to 15F illustrate a mechanism for achieving the noted motion by using a reciprocating shaft. Specifically, FIGS. 15A to 15C illustrate a preferred embodiment toothbrush S having a body 2010, a neck 2040, and a head 2050. Disposed along the head 2050 is a distal-most or first bristle carrier 2060 and a second bristle carrier 2070. The distal-most first bristle carrier 2060 is located near a distal-most end 2052 of the head 2050. The body 2010 encloses a rotating or oscillating shaft 2020 having a distal end 2022. Engaged or otherwise secured to the distal end 2022 of the shaft 2020 is a gear member 2030. The gear member 2030 includes a channel 2032 within which is disposed a tracking member described below. The first bristle carrier 2060 includes a base 2062 and a downwardly extending tracking or guide member 2064. As noted with reference to FIGS. 12A-12C, the base may be of a unitary construction and not utilize a separate plate component. As noted, the tracking member 2064 is retained or otherwise disposed in the channel 2032 of the gear member 2030. The head 2050 provides an inclined ramp surface 2056 along which is defined a guide channel or elongated aperture 2054. During operation and oscillation or rotation of the shaft 2020, the gear member 2030 is also similarly moved. This in turn causes linear displacement of the base 2062 by tracking member 2064 moving within the channel 2032. Linear displacement of the base 2062 in turn causes linear displacement of the first bristle carrier 2060. A vertical component to this motion is imparted to the bristle carrier 2060 by the inclined ramp surface 2056. Further modification to the direction of travel motion of the first bristle carrier 2060 is imparted by the orientation of the guide channel 2054.

FIGS. 15D to 15F illustrate a preferred embodiment drive mechanism for achieving the noted motion shown in FIG. 2C using a reciprocating powered shaft. FIGS. 15D to 15F illustrate a preferred embodiment toothbrush T having a body 2110, including a neck 2140, and a head 2150. Disposed along the head 2150 is a first bristle carrier 2160 and a second bristle carrier 2170. The first bristle carrier 2160 is disposed near the distal-most end 2152 of the head 2150. The body encloses a reciprocating shaft 2124 having a distal end 2126. The first bristle carrier 2160 includes a base 2162 and a retention member 2164. The retention member 2164 is engaged or otherwise affixed to the distal end 2126 of the shaft 2124. Alternatively, a link member 2176 may be used to secure or engage the distal end 2126 of the shaft 2124 to the retention member 2164. The head 2150 includes an inclined ramp surface 2156 within which is defined a guide channel or elongated aperture 2154. The base is positionable and moveably disposed on the head. The base is positioned over the guide channel. The base may be of a unitary construction and not utilize a separate retention member component. Upon operation, the shaft 2124 reciprocates and causes linear displacement of the base 2162 by the connection between the retention member 2164 and the distal end 2126 of the shaft 2124. A vertical component of motion is imparted to the movement of the first bristle carrier 2160 by the inclined ramp surface 2156. Furthermore, a desired direction of travel of the first bristle carrier 2160 is achieved by the guide channel 2154, or rather its orientation along the upwardly directed surface of the head 2150.

FIGS. 7A-7D illustrate a mechanism for achieving motion shown in FIG. 2D. As noted, that motion is the first bristle carrier moving in a “pulsing” fashion. The mechanism of FIGS. 7A-7D is described in greater detail herein.

FIGS. 11A to 11G illustrate two preferred mechanisms for achieving the motion illustrated in FIG. 2E. FIGS. 11A to 11D illustrate a mechanism powered by a rotating or oscillating shaft. FIGS. 11E to 11G illustrate a mechanism powered by a reciprocating shaft. Specifically, FIGS. 11A to 11D illustrate a preferred embodiment toothbrush K having a body 1210 including a neck 1240 and a head 1250. Provided along the head 1250 is a distal-most or first bristle carrier 1260 and a second bristle carrier 1270. The first bristle carrier 1260 is located near the distal-most end 1252 of the head 1250. The body 1210 encloses a rotating shaft 1220 having an offset end 1222. The first bristle carrier 1260 has a base 1262 with an outwardly extending arm 1264 that defines a receiving channel 1266. The offset end 1222 of the shaft 1220 is engaged with and generally disposed within the receiving channel 1266 of the base 1262 of the first bristle carrier 1260. Upon rotation of the shaft 1220, the offset end 1222 causes lateral displacement of the first bristle carrier 1260. Specifically, the resulting motion of the first bristle carrier is perpendicular to the longitudinal axis of the toothbrush head 1250. A clearance 1276 is provided within the head 1250 to allow for movement of the first bristle carrier 1260. It will be appreciated that as the shaft 1220 rotates, the first bristle carrier 1260 is laterally displaced in a side-to-side type motion. Motion in a direction that is oriented at some angle to the plane of the toothbrush head may be achieved by providing a ramp surface 1254 along the upwardly directed surface of the head 1250. This is best shown in FIG. 11C. Thus, as the shaft 1220 rotates, the side-to-side movement of the bristle carrier 1260 is further translated along an incline from the ramp surface 1254. Preferably, the base is positionable and movably disposed on the head and in contact with the ramp surface.

Referring to FIGS. 11E to 11G, a second mechanism is illustrated for achieving a motion corresponding to that illustrated in FIG. 2E. Specifically, FIGS. 11E to 11G illustrate a preferred embodiment toothbrush L having a body 1310 including a neck 1340 and a head 1350. A first bristle carrier 1360 is disposed near a distal-most end 1352 of the head 1350. And, a second bristle carrier 1370 is provided next to the first bristle carrier 1360. The body 1310 encloses a reciprocating shaft 1324 having an offset end 1326. The first bristle carrier 1360 includes a base 1362 having a downwardly extending arm 1364 which defines a receiving channel 1366. The offset end 1326 of the shaft 1324 is engaged with and generally disposed within the channel 1366. The head 1350 defines an upwardly directed ramp surface 1351. Preferably, the base is positionable and moveably disposed on the head and in contact with ramp surface. In operation, as the shaft 1324 reciprocates, the first bristle carrier 1360 is translated or reciprocated along the head 1350 and in a direction generally parallel to the inclination of the ramp surface 1351.

FIGS. 16A to 16D illustrate mechanisms for achieving the motion illustrated in FIG. 2F. FIGS. 16A and 16B demonstrate a mechanism using a rotating or oscillating powered shaft to achieve the noted motion. And, FIGS. 16C and 16D illustrate a mechanism using a reciprocating shaft to achieve the noted motion. Specifically, FIGS. 16A and 16B illustrate a preferred embodiment toothbrush U having a body 2210, including a neck 2240, and a head 2250. Disposed along the head 2250 is a distal-most or first bristle carrier 2260 and a second bristle carrier 2270. The first bristle carrier 2260 is located near the distal-most end 2252 of the head 2250. The body 2210 encloses a rotating or oscillating shaft 2220 having a distal end 2222. A gear member 2230 is engaged or otherwise secured to the distal end 2222 of the shaft 2220. The gear member 2230 defines a channel 2232 along its outer surface. The second bristle carrier 2270 includes a base 2272 and a plate 2274 having a downwardly extending tracking or guide member 2276. The base is movably disposed on the head and positionable with respect to the head. The tracking member 2276 is disposed or otherwise engaged within the channel 2232 of the gear member 2230. The head 2250 includes a guide channel or elongated aperture 2254 defined along an upwardly directed surface generally underneath the second bristle carrier 2270. Upon operation, the shaft 2220 is rotated or oscillated which in turn causes similar movement of the gear member 2230. As the gear member 2230 undergoes that motion, the tracking member 2276 is linearly displaced within the channel 2232. Linear displacement of the tracking member 2276 causes similar linear displacement of the plate 2274 and base 2272 of the second bristle carrier 2270. The guide channel 2254 defined along the head 2250 imparts a further component to the motion of the second bristle carrier 2270. In the illustration shown in FIG. 16A, since the guide channel 2254 is curvilinear then so, too, is the travel path of the second bristle carrier 2270.

FIGS. 16C and 16D illustrate another preferred embodiment mechanism utilized to achieve the noted motion of FIG. 2F by use of a reciprocating shaft. FIGS. 16C and 16D illustrate a preferred embodiment toothbrush V, having a body 2310, a neck 2340, and a head 2350. Disposed along the head 2350 is a distal-most first bristle carrier 2360 and a second bristle carrier 2370. The second bristle carrier has a base 2372 and a plate 2374 having a downwardly extending guide member 2376. The base is movably disposed on the head and positionable with respect to the head. The guide member 2376 is affixed or otherwise engaged with an engagement member 2332 which extends from a coupler 2330 affixed to the distal end 2326 of the shaft 2324. The head 2350 defines a guide channel or elongated aperture 2354 generally underneath the second bristle carrier 2370. The guide channel imparts a particular desired path of travel for the second bristle carrier 2370. During operation, the shaft 2324 reciprocates, thus causing linear displacement of the coupler 2330. The coupler 2330 imparts this motion to the plate 2374 and base 2372 of the second bristle carrier 2370. This reciprocating motion is further modified by the orientation and shape of the guide channel 2354 defined in the head 2350.

FIGS. 20A to 20D illustrate a mechanism for achieving the motion noted in FIG. 2G. Specifically, these figures illustrate a preferred embodiment toothbrush AC having a body 3010, including a neck 3040, and a head 3050. Defined within the interior of the head 3050 are a plurality of internal guide members 3054. These guide members 3054 define one or more camming apertures 3056. The brush AC further includes a first bristle carrier 3060 and a second bristle carrier 3070. The first bristle carrier 3060 is disposed near a distal-most end 3052 of the head 3050 of the brush AC. The body 3010 generally encloses a reciprocating shaft 3024 having a distal end 3026. The second bristle carrier 3070 includes a base 3072 and a downward extension member 3074. The base is positionable and moveably disposed on the head. Extending laterally outward from the downward extension member 3074 are a plurality of lateral extension members 3076. Disposed at a lower-most region of the downward extension member 3074 is a drive tab 3078. A linkage assembly preferably in the form of a connector 3080 engages the distal end 3026 of the reciprocating shaft 3024 to the downward extension member 3074 of the second bristle carrier 3070. Specifically, the connector 3080 is engaged with the distal end 3026 of the shaft 3024 and provides an engagement aperture 3082. The drive tab 3078 of the downward extension member 3074 extends and is generally engaged and disposed in the engagement aperture 3082 of the connector 3080. During operation, as the reciprocating shaft 3024 reciprocates within the neck 3040 of the body 3010, that reciprocating motion is imparted to the connector 3080. The connector 3080 in turn is engaged to the second bristle carrier 3070 and generally engages that component in a similar manner. The aperture, or rather the orientation of the aperture 3056, further guides and modifies the motion of the second bristle carrier 3070. The lateral extension members 3076 of the downward extension member 3074 are generally received in and by the aperture 3056.

FIGS. 17A to 17G illustrate two mechanisms used to achieve motion noted in FIG. 2H. Specifically, FIGS. 17A to 17C illustrate a mechanism used to achieve the noted motion from a rotating or oscillating shaft. FIGS. 17D to 17G illustrate a mechanism used to achieve the noted motion from a powered reciprocating shaft. Specifically, FIGS. 17A to 17C illustrate a preferred embodiment toothbrush W, having a body 2410, including a neck 2440, and a head 2450. Disposed along the head 2450 is a distal-most or first bristle carrier 2460 and a second bristle carrier 2470. The first bristle carrier 2460 is disposed next to or near the distal-most end 2452 of the head 2450. The body 2410 encloses a rotating shaft 2420. The shaft 2420 has a distal end 2422 to which is engaged a screw member 2430. The screw member 2430 defines a channel 2432. The second bristle carrier 2470 includes a base 2472 and a plate 2474. The base is moveably disposed on the head and positionable with respect to the head. Extending downwardly from the plate 2474 is a guide member 2476. It will be understood that the base may be of a unitary construction and not utilize a separate plate component. That is, the base itself may provide a downwardly extending guide member. The guide member 2476 extends into the channel 2432 defined by the screw member 2430. The head 2450 includes an inclined ramp surface 2456 generally underneath the second bristle carrier 2470 and further defines a guide channel or elongated aperture 2454. During operation, the rotating or oscillating shaft 2420 imparts a similar motion to the screw member 2430. That, in turn, causes linear displacement of the plate 2474 and the base 2472 of the second bristle carrier 2470. A vertical component is imparted to this motion from the inclined ramp surface 2456 defined along the head 2450. A further curvature or other component of motion is imparted by the orientation of the guide channel 2454.

FIGS. 17D to 17G illustrate another preferred embodiment mechanism used to achieve the noted motion of FIG. 2H. This drive train utilizes a reciprocating shaft to drive the second bristle carrier. Specifically, FIGS. 17D to 17G illustrate a preferred embodiment toothbrush X, including a body 2510, having a neck 2540, and a head 2550. Disposed along the head 2550 are a distal-most first bristle carrier 2560 and a second bristle carrier 2570. The second bristle carrier includes a base 2572 and a plate 2574 having a downwardly extending guide member 2576. The base is positionable and movably disposed on the head. The base may be unitary and not utilize a separate plate component. That is, the base may provide the downwardly extending guide member. The head 2550 includes an inclined ramp surface 2556 and a guide channel or elongated aperture 2554 defined along its upwardly directed surface generally underneath the second bristle carrier 2570. Engaged or otherwise attached to the shaft 2524, is a coupler 2530. The coupler includes an engagement member 2532 extending therefrom. The engagement member 2532 is received and generally engaged with the guide member 2576 extending from the plate 2574 of the second bristle carrier 2570. As shown in FIG. 17G, it is preferred that the base 2572 is engaged with the plate 2574 by one or more downwardly extending projections 2573 that are received and disposed in apertures 2575 defined in the plate 2574. During operation, the shaft 2524 reciprocates and causes similar reciprocation of the coupler 2530. That, in turn, linearly displaces the plate 2574 and the base 2572 of the second bristle carrier 2570. A vertical component to this motion is imparted by the inclined ramp surface 2556. Further motion or change in path is obtained by use of the guide channel 2554.

A mechanism for achieving the motion depicted in FIG. 21 is described later herein. That motion is of the second bristle carrier undergoing repeated motion that is primarily linear, however, non-planar, and hence three dimensional. FIGS. 22A-22C illustrate an exemplary mechanism.

Another category of combinations of movements of the two bristle carriers is that in which the first bristle carrier undergoes two dimensional periodic movement that is primarily linear in combination with two or three dimensional periodic movement that is also primarily linear by the second bristle carrier.

The first bristle carrier may undergo any type of repeated motion that is primarily linear and within the plane of the toothbrush head or within a plane that is generally parallel to the plane of the toothbrush head. Or, the first bristle carrier may undergo repeated motion that is primarily linear and within a plane that is perpendicular to the plane of the toothbrush head (and so, approach a “pulsing” type motion). Or, the first bristle carrier may undergo repeated motion that is primarily linear in a plane other than one that is parallel or perpendicular to the plane of the toothbrush head. Instead, the first bristle carrier may undergo repeated motion that is primarily linear and non-planar. This motion of the first bristle carrier, although non-planar and thus three dimensional, can be characterized by primarily extending within a plane that is (i) within the plane of the toothbrush head or a plane generally parallel thereto; (ii) perpendicular to the plane of the toothbrush head; or (iii) different than either the plane of the toothbrush head or a plane perpendicular thereto.

The second bristle carrier may undergo repeated motion that is primarily linear within the plane of the toothbrush head or a plane that is generally parallel to the plane of the toothbrush head. Or, the second bristle carrier may undergo repeated motion that is primarily linear in a plane that is perpendicular to the plane of the toothbrush head (and so, approach a “pulsing” type motion). Alternately, the second bristle carrier may undergo repeated motion that is primarily linear in a plane other than one that is parallel or perpendicular to the plane of the toothbrush head. Or, the second bristle carrier may undergo repeated motion that is primarily linear and non-planar. This motion of the second bristle carrier, although non-planar and thus three dimensional, can be characterized by primarily extending within a plane that is (i) within the plane of the toothbrush head or a plane parallel thereto; (ii) perpendicular to the plane of the toothbrush head; or (iii) different than either the plane of the toothbrush head or a plane perpendicular thereto.

Again, it will be appreciated that in this category of movement combinations, any of the movements of the first bristle carrier may be utilized in combination with any of the movements of the second bristle carrier.

FIG. 3 is a front elevational view illustrating another preferred embodiment toothbrush in accordance with the present invention and providing the previously noted combinations of bristle carrier motions. FIG. 3 illustrates toothbrush B having a body 210 with a neck 240 and a head 250. Disposed on the head 250 are a first bristle carrier 260 and a second bristle carrier 270. As will be noted, the first bristle carrier 260 is proximate the distal-most end 252 of the head 250. The first bristle carrier 260 and second bristle carrier 270 of the preferred embodiment toothbrush B are configured to undergo various types of specific motion as follows.

FIGS. 3A to 3D illustrate various types of motion that the first bristle carrier 260 may undergo. FIG. 3A illustrates the first bristle carrier 260 undergoing motion that is primarily linear and within the plane of the toothbrush head or within a plane that is generally parallel to the plane of the toothbrush head. FIG. 3B illustrates the first bristle carrier 260 undergoing repeated motion that is primarily linear and within a plane that is perpendicular to the plane of the toothbrush head, such as plane Y depicted in FIG. 1. And so, FIG. 3B illustrates the pulsing type motion described herein. FIG. 3C illustrates another motion by the first bristle carrier 260 in which its motion is primarily linear and in a plane other than one that is parallel or perpendicular to the plane of the toothbrush head. And, FIG. 3D illustrates another motion of the first bristle carrier 260 in which it undergoes repeated motion that is primarily linear and non-planar, and thus three dimensional.

FIGS. 3E to 3H illustrate additional types of motion that the second bristle carrier 270 of the preferred embodiment toothbrush B may undergo. Specifically, FIG. 3E illustrates repeated motion that the second bristle carrier 270 may undergo that is primarily linear within the plane of the toothbrush head or a plane that is generally parallel to the plane of the toothbrush head. FIG. 3F illustrates the second bristle carrier undergoing repeated motion that is primarily linear in a plane that is perpendicular to the plane of the toothbrush head, such as plane Y shown in FIG. 1, and so approaching a pulsing type motion. FIG. 3G illustrates the second bristle carrier 270 undergoing repeated motion that is primarily linear in a plane other than one that is parallel or perpendicular to the plane of the toothbrush head. FIG. 3H illustrates the second bristle carrier 270 undergoing repeated motion that is primarily linear and non-planar. This motion of the bristle carrier 270 is three dimensional.

The preferred embodiment toothbrush B may be configured such that the first bristle carrier 260 may undergo any of the motions depicted in FIGS. 3A to 3E, in combination with the second bristle carrier 270 undergoing any of the motions depicted in FIGS. 3E to 3H.

FIGS. 12A to 12E illustrate two preferred embodiment mechanisms for achieving the motion noted in FIG. 3A. Specifically, FIGS. 12A to 12C illustrate a mechanism for achieving this noted motion by use of a rotating or oscillating powered shaft. And, FIGS. 12D to 12E illustrate a mechanism for achieving this motion using a reciprocating shaft. Specifically, FIGS. 12A to 12C illustrate a preferred embodiment toothbrush M having a body 1410, a neck 1440, and a head 1450. Disposed along the head 1450 is a distal-most first bristle carrier 1460 and a second bristle carrier 1470. The body 1410 encloses or houses a rotating shaft 1420 having a distal end 1422. Engaged along the distal end 1422 is a screw gear 1430. The screw gear 1430 defines a channel 1432. The distal-most bristle carrier includes a base 1462, a carrier plate 1463, and a tracking or guide member 1464 extending from the carrier plate 1463. The screw gear 1430, engaged to the distal end 1422 of the shaft 1420, is positioned such that it is located below or generally underneath the carrier plate 1463 of the first bristle carrier 1460. Specifically, the tracking member 1464 of the carrier plate 1463 is disposed within the channel 1432 defined by the screw gear 1430. It will be appreciated that the base may be a unitary component and include an integral tracking or guide member without a carrier plate 1463. Upon rotation or oscillation of the shaft 1420, the tracking member 1464 is linearly displaced as it moves through the channel 1432 defined along screw gear 1430. The linear displacement of the tracking member 1464 causes linear displacement of the carrier plate 1463 and thus of the base 1462. As the base 1462 is linearly reciprocated along the end or head 1450 of the toothbrush M, the first bristle carrier 1450 is translated. A guide channel or elongated aperture 1454 defined along an upwardly directed surface of the head 1450 further modifies movement of the first bristle carrier 1460. Thus, depending upon the shape or configuration of the guide channel 1454, the first bristle carrier 1460 may be moved in a curvilinear fashion or any other desired path.

FIGS. 12D to 12E illustrate a preferred embodiment mechanism for providing the noted motion shown in FIG. 3A based upon a reciprocating powered shaft 1524. FIGS. 12D to 12E illustrate a preferred embodiment toothbrush N having a body 1510, a neck 1540, and a head 1550. Disposed along the head 1550 is a distal-most first bristle carrier 1560 and a second bristle carrier 1570. The body 1510 encloses a reciprocating shaft 1524 having an offset end 1526. The first bristle carrier 1560 has a base 1562 which provides a downwardly extending retention or guide member 1564. The base is positionable and movably disposed on the head. The retention member 1564 is engaged with one or more secondary guide members 1566 that extend from the base 1562. The guide members 1566 extend through a guide channel or elongated aperture 1554 defined in the upwardly facing surface of the head 1550. It will be appreciated that the base may be of a unitary construction and not utilize a separate retention member 1564. That is, the base itself may include an outwardly extending guide member projecting through the aperture 1554 defined in the head. Upon motion or reciprocation of the shaft 1524, the retention member 1564 which is engaged to the offset end 1526 of the shaft 1524, is linearly displaced within the interior of the head 1550. Linear displacement of the retention member 1564 causes linear displacement of the base 1562 since the one or more guide members 1566 are engaged with the retention member 1564. The shape of the guide channel 1554 defined along the head 1550 further modifies or affects the travel path of the first bristle carrier 1560.

FIGS. 19A to 19G illustrate two preferred embodiment mechanisms for imparting the motion illustrated in FIG. 3B. FIGS. 19A to 19C illustrate a mechanism using a rotating or oscillating powered shaft to achieve the noted motion. And, FIGS. 19D to 19G illustrate a mechanism for achieving such motion using a reciprocating shaft. Specifically, FIGS. 19A to 19C illustrate a preferred embodiment toothbrush AA having a body 2810, a neck 2840, and a head 2850. Disposed along the head 2850 is a first distal-most bristle carrier 2860 and a second bristle carrier 2870. The first bristle carrier 2860 is proximate a distal-most end 2852 of the head 2850. The body 2810 encloses or houses a rotating or oscillating shaft 2820 having a distal end 2822. Engaged at the distal end 2822 is a screw gear 2830 defining a channel 2832. The first bristle carrier 2860 includes a base 2862 and a downwardly extending member 2866. The base is positionable and movably disposed on the head. Extending laterally outward from the downward extension member 2866 are a plurality of lateral extension members 2864. The interior of the head 2850 includes one or more internal guide members 2854 that define an internal guide or camming aperture 2856. The one or more lateral extension members 2864 preferably extend in and are guided by the guide or camming aperture 2856 defined in the guide members 2854. A linkage assembly including a linking member 2880 and a connector 2888 engage the screw gear 2830 to the downward extension member 2866 of the first bristle carrier 2860. Specifically, the linking member 2880 includes a follower 2882 that is received within the channel 2832 of the screw gear 2830. The linking member 2880 also includes an opposite trailing member 2884 located opposite from the follower 2882. A connector 2888 is engaged with the trailing member 2884 of the linking member 2880. And, as seen from the illustrations, the connector 2888 is engaged with the downward extension member 2866 of the first bristle carrier 2860. In operation, as the rotating shaft 2820 rotates or oscillates, so, too, does the screw gear 2830. The channel 2832 imparts a reciprocating motion to the linking member 2880 and connector 2888. This in turn is imparted to the downward extension member 2866 of the first bristle carrier 2860. The guide aperture 2856 defined within the internal region of the head 2850 further governs the movement of the first bristle carrier 2860.

FIGS. 19D to 19G illustrate another preferred embodiment mechanism for achieving the noted motion illustrated in FIG. 3B from a reciprocating shaft. Specifically, these figures illustrate a preferred embodiment toothbrush AB having a body 2910, including a neck 2940, and a head 2950. Disposed along the head 2950 is a distal-most first bristle carrier 2960 and a second bristle carrier 2970. The first bristle carrier 2960 is disposed adjacent and proximate a distal-most end 2952 of the head 2950. The body 2910 encloses a reciprocating shaft 2924 having a distal end 2926. The first bristle carrier 2960 includes a base 2962 having a downwardly extending member 2966. The base is positionable and movably disposed on the head. Extending laterally from the downwardly extending member 2966 are a plurality of lateral extension members 2964. Defined within the head 2950 are a plurality of internal guide members 2954. These internal guide members define a camming aperture 2956 for guiding movement of the first bristle carrier 2960. Specifically, it will be seen that the one or more lateral extension members 2964 extend within and engage the aperture 2956. A linkage assembly preferably in the form of a connector 2980 engages the distal end of the reciprocating shaft 2924 to the downwardly extending member 2966. One end of the connector 2980 is affixed to an engagement aperture 2968 defined in the downwardly extending member 2966. In operation, upon reciprocation of the shaft 2924, the connector 2980 and thus the downwardly extending member 2966 of the first bristle carrier 2960 are reciprocated within the head 2950. This motion is further modified by the configuration of the aperture 2956 defined in the guide members 2954.

FIGS. 13A to 13F illustrate two preferred embodiment mechanisms for imparting motion as illustrated in FIG. 3C. FIGS. 13A to 13C illustrate a drive train for imparting this motion based upon a rotating or oscillating shaft. FIGS. 13D to 13F illustrate a mechanism for achieving the noted motion from a reciprocating powered shaft. Specifically, FIGS. 13A to 13C illustrate a preferred embodiment toothbrush O having a body

1. An electric toothbrush comprising: a handle at a first end of the toothbrush having a motor disposed therein; a head at a second end of the toothbrush, the head having a longitudinal axis, the head having a first bristle holder having a first plurality of bristle tufts and a second bristle holder having a second plurality of bristle tufts; and wherein the motor is operatively connected to the first bristle holder to move the first bristle holder along a first axis and about a second axis different from the first axis, wherein the first axis is generally parallel to the longitudinal axis and wherein the first bristle holder's movement is non-planar, wherein the motor is operatively connected to the second bristle holder to move the second bristle holder, wherein the second bristle holder's movement is non-planar.

2. An electric toothbrush according to claim 1, wherein the movement of the first bristle holder along the first axis and about the second axis is simultaneous.

3. An electric toothbrush according to claim 1, wherein the second axis is generally transverse to the first axis.

4. An electric toothbrush according to claim 1, wherein the first axis and the second axis are not parallel to each other.

5. An electric toothbrush according to claim 1, wherein the first bristle holder moves in an arcing motion.

6. An electric toothbrush according to claim 1, further comprising a rotating or oscillating shaft.

7. An electric toothbrush according to claim 1, wherein the first bristle holder periodically reciprocates along the first axis.

8. An electric toothbrush according to claim 1, wherein the first bristle holder periodically oscillates about the second axis.

9. An electrical toothbrush according to claim 1, wherein the movement of the first bristle holder and the movement of the second bristle holder occur simultaneously.

10. An electric toothbrush according to claim 1, further comprising a reciprocating shaft.