Complex motion toothbrush

• US 6,952,854 B2
• Filed: 08/27/2004
• Issued: 10/11/2005
• Est. Priority Date: 11/06/2001
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Brown, Patrick W., Gall, Douglas A., Blaustein, Lawrence A.
• Primary Examiner(s): Spisich, Mark
• Application Number:
  US10/927,845
• Publication Number:
  US 20050005375A1
• Time in Patent Office: 410 Days
• Field of Search: 15/221, 15/222, 15/224, 15/28, 15/29
• US Class Current: 15/22.1
• CPC Class Codes: A46B 9/025 the bristles or the tufts being arranged in an angled position relative to each other
• CPC Class Codes: A46B 9/04 Arranged like in or for toothbrushes
• CPC Class Codes: A61C 17/34 driven by electric motor
• CPC Class Codes: A61C 17/3472 with combined movements of the brush body
• CPC Class Codes: A61C 17/349 with multiple brush bodies

Abstract

A detachable head for use with an electric toothbrush is provided. The electric toothbrush has a handle with a motor disposed therein. The electric toothbrush also has a head which has a longitudinal axis, and a neck disposed between the head and handle. The head has a first bristle holder and a second bristle holder, each having a plurality of bristle tufts. The motor is operatively connected to the first bristle holder to oscillate the first bristle holder about a first axis passing through the first bristle holder generally perpendicular to the longitudinal axis of the head. The motor is also operatively connected to the second bristle holder to oscillate the second bristle holder about a second axis transverse to the longitudinal axis of the head. The second axis is at an end portion of the second bristle holder.

Claims

1. An electric toothbrush, comprising:

a handle having a motor disposed therein;

a head having a longitudinal axis, the head having a first bristle holder with a plurality of bristle tufts and a second bristle holder with a plurality of bristle tufts, the second bristle holder having an end portion, each of the bristle tufts of the first and second bristle holders having a base end connected to its respective bristle holder and an opposite free end;

a neck disposed between the handle and the head;

wherein the motor is operatively connected to the first bristle holder to oscillate the first bristle holder about a first axis passing through the first bristle holder generally perpendicular to the longitudinal axis of the head; and

wherein the motor is operatively connected to the second bristle holder to oscillate the second bristle holder about a second axis transverse to the longitudinal axis of the head, wherein the base ends of the tufts of the second bristle holder move in unison and in the same direction with the free ends thereof, and wherein the second axis is at the end portion of the second bristle holder.

2. The electric toothbrush of claim 1, wherein the end portion of the second bristle holder is located adjacent the neck.

3. The electric toothbrush of claim 1, wherein the toothbrush further comprises a shaft having a longitudinal axis and operatively connected to the motor, wherein the shaft engages the first and second bristle holders.

4. The electric toothbrush of claim 3, wherein the shaft further comprises a cam, and wherein the engagement between the shaft and the second bristle holder occurs between the cam and the second bristle holder.

5. The electric toothbrush of claim 3, wherein the shaft further comprises a cam, and wherein the engagement between the shaft and the first bristle holder occurs between the cam and the first bristle holder.

6. The electric toothbrush of claim 5, wherein the first bristle holder has a slot that captures the cam such that the engagement between the cam and the first bristle holder occurs between the cam and the slot.

7. The electric toothbrush of claim 6, wherein the cam is at a remote-most end of the shaft.

8. The electric toothbrush of claim 3, wherein the shaft further comprises a cam, and wherein the engagement between the shaft and the first and second bristle holders occur between the cam and the first and the second bristle holders.

9. The electric toothbrush of claim 8, wherein the cam is secured to the shaft.

10. The electric toothbrush of claim 3, wherein the shaft is rotatable.

11. The electric toothbrush of claim 3, wherein shaft completely passes under the second moving bristle holder and does not completely pass under the first bristle holder.

12. The electric toothbrush of claim 1, further comprising a gap between the first bristle holder and the second bristle holder.

13. The electric toothbrush of claim 1, wherein the first axis is surrounded by the plurality of bristles of the first bristle holder.

14. The electric toothbrush of claim 1, wherein the plurality of bristle tufts of the second bristle holder differ in height.

15. The electric toothbrush of claim 14, wherein the second bristle holder further has a top surface, and wherein at least one of the bristle tufts of the second bristle holder forms an acute angle with the top surface of the second bristle holder.

16. The electric toothbrush of claim 15, wherein the at least one of the bristle tufts of the second bristle holder is angled away from the neck.

17. The electric toothbrush of claim 16, wherein the at least one of the bristle tufts of the second bristle holder is angled toward the neck.

18. The electric toothbrush of claim 1, wherein the head directly supports the first and second bristle holders.

19. The electric toothbrush of claim 1, wherein the first bristle holder further comprises a top surface and wherein some of the plurality of bristle tufts of the first bristle holder form an acute angle with the top surface of the first bristle holder.

20. The electric toothbrush of claim 19, wherein the plurality of bristle tufts of the first bristle holder differ in height.