Oral care implement

• US 10,512,323 B2
• Filed: 12/08/2016
• Issued: 12/24/2019
• Est. Priority Date: 08/09/2002
• Status: Expired due to Term

• Current Assignee: Colgate-Palmolive Company
• Original Assignee: Colgate-Palmolive Company
• Inventors: Moskovich, Robert, Storz, Joachim, Langgner, Tanja, Kuchler, Thomas
• Primary Examiner(s): Guidotti, Laura C
• Application Number:
  US15/372,666
• Publication Number:
  US 20170099938A1
• Time in Patent Office: 1,111 Days
• CPC Class Codes: A46B 15/0055 Brushes combined with other articles normally separate from the brushing process, e.g. combs, razors, mirrors
• CPC Class Codes: A46B 15/0081 Brushes with a scraper, e.g. tongue scraper
• CPC Class Codes: A46B 2200/1066 Toothbrush for cleaning the teeth or dentures A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04
• CPC Class Codes: A46B 3/04 by mouldable materials, e.g. metals, cellulose derivatives, plastics A46B1/00 takes precedence
• CPC Class Codes: A46B 3/06 by welding together bristles made of metal wires or plastic materials
• CPC Class Codes: A46B 5/0025 Brushes with elastically deformable heads that change shape during use
• CPC Class Codes: A46B 5/0029 Head made of soft plastics, rubber or rubber inserts in plastics matrix
• CPC Class Codes: A46B 9/026 where the surface of the brush body or carrier is not in one plane, e.g. not flat A46B9/005 takes precedence
• CPC Class Codes: A46B 9/04 Arranged like in or for toothbrushes

Abstract

A toothbrush includes a handle and a head mounted to the handle. In one aspect, the head may extend from a proximal end to a distal end along a longitudinal axis, the head having a base portion formed of a rigid plastic material and a flexible portion formed of an elastomeric material, a first longitudinal section of the flexible portion spaced apart from the base portion by a gap. The flexible portion of the head may have an upper surface and an opposing lower surface such that within the first longitudinal section of the flexible portion the upper surface and the lower surface are substantially planar and parallel to one another. Furthermore, tooth cleaning elements may be secured to the flexible portion of the head by in-molded technology to extend from the upper surface of the flexible portion.

Claims

1. A toothbrush comprising:

a handle;

a head extending from a proximal end to a distal end along a longitudinal axis, the head comprising a base portion formed of a rigid plastic material and a flexible portion formed of an elastomeric material coupled to the base portion, a first longitudinal section of the flexible portion spaced apart from the base portion by a gap that forms a transverse passageway through the head from a first side of the head to a second side of the head;

the flexible portion of the head having an upper surface and an opposing lower surface, wherein within the first longitudinal section of the flexible portion the upper surface and the lower surface are substantially planar and parallel to one another;

the flexible portion of the head having a proximal end surface extending between the upper surface and the lower surface of the flexible portion of the head, the proximal end surface fixedly coupled to the base portion of the head; and

tooth cleaning elements secured to the flexible portion of the head and extending from the upper surface of the flexible portion;

wherein the upper surface of the flexible portion of the head is coplanar with the base portion of the head at the proximal end surface.

2. The toothbrush of claim 1 wherein a second longitudinal section of the flexible portion is coupled to the base portion adjacent the distal end of the head and a third longitudinal section of the flexible portion is coupled to the base portion at the proximal end of the head, the first longitudinal section of the flexible portion being located between the second and third longitudinal sections of the flexible portion.

3. The toothbrush of claim 2 wherein the flexible portion of the head is fixedly coupled to the base portion of the head, and wherein an entirety of the upper surface of the flexible portion of the head is substantially planar.

4. The toothbrush of claim 3 wherein the flexible portion of the head is movable between:

(1) a rest state wherein the upper surface of the flexible portion of the head is planar; and

(2) a use state wherein the flexible portion of the head deflects into the gap and the upper surface of the flexible portion of the head is concave.

5. The toothbrush of claim 4 wherein the flexible portion of the head transitions from the rest state into the use state in response to pressure being applied to the upper surface of the flexible portion, the flexible portion automatically returning to the rest state upon release of the pressure.

6. The toothbrush of claim 5 wherein when the flexible portion of the head is in the rest state, the tooth cleaning elements extend from the upper surface of the flexible portion at varying heights.

7. The toothbrush of claim 1 wherein the transverse passageway terminates in a first opening on the first side of the head and a second opening on the second side of the head.

8. The toothbrush of claim 7 wherein each of the first and second sides of the head extends between the proximal and distal ends of the head.

9. The toothbrush of claim 8 wherein each of the first and second openings is elongated in a direction of the longitudinal axis, and wherein a transverse axis that is perpendicular to the longitudinal axis intersects both of the first and second openings and the transverse passageway without intersecting the flexible portion of the head.

10. The toothbrush of claim 9 wherein the transverse passageway is visible from the first and second sides of the head.

11. The toothbrush of claim 1 wherein the tooth cleaning elements comprise a first tooth cleaning element having a first length measured from the upper surface of the flexible portion to a proximal end and a second tooth cleaning element having a second length measured from the upper surface of the flexible portion to a proximal end, the first length being greater than the second length.

12. A toothbrush comprising:

a handle;

a head extending from a proximal end to a distal end along a longitudinal axis, the head comprising a base portion formed of a rigid plastic material and a flexible portion formed of an elastomeric material coupled to the base portion, a first longitudinal section of the flexible portion spaced apart from the base portion by a gap that forms a transverse passageway through the head from a first side of the head to a second side of the head;

the flexible portion of the head having an upper surface and an opposing lower surface, wherein within the first longitudinal section of the flexible portion the upper surface and the lower surface are substantially planar and parallel to one another;

the flexible portion of the head having a proximal end surface extending between the upper surface and the lower surface of the flexible portion of the head, the proximal end surface fixedly coupled to the base portion of the head; and

tooth cleaning elements secured to the flexible portion of the head and extending from the upper surface of the flexible portion;

wherein the base portion of the head has a top surface adjacent to the gap and an opposing bottom surface, and wherein the top surface is concave and the bottom surface is convex.

13. A toothbrush comprising:

a handle;

a head extending from a proximal end to a distal end along a longitudinal axis, the head comprising a base portion formed of a rigid plastic material and a flexible portion formed of an elastomeric material, the flexible portion of the head fixedly coupled to the base portion of the head;

a first longitudinal section of the flexible portion spaced apart from the base portion by a gap, a second longitudinal section of the flexible portion coupled to the base portion adjacent the distal end of the head, and a third longitudinal section of the flexible portion having a proximal end surface, the proximal end surface embedded within the base portion at the proximal end of the head, the first longitudinal section of the flexible portion being located between the second and third longitudinal sections of the flexible portion;

the flexible portion of the head having an upper surface and an opposing lower surface, wherein an entirety of the upper surface of the flexible portion is substantially planar and at least a portion of the lower surface of the flexible portion located within the first longitudinal section of the flexible portion is substantially planar and parallel to the upper surface of the flexible portion;

the base portion of the head having a top surface adjacent to the gap and an opposing bottom surface, and wherein the top surface is concave and the bottom surface is convex; and

tooth cleaning elements secured to the flexible portion of the head, the tooth cleaning elements comprising a first tooth cleaning element having a first length measured from the upper surface of the flexible portion to a proximal end and a second tooth cleaning element having a second length measured from the upper surface of the flexible portion to a proximal end, the first length being greater than the second length.

14. The toothbrush of claim 13 wherein the gap forms a transverse passageway through the head from a first side of the head to a second side of the head, the transverse passageway being visible from the first and second sides of the head.

15. The toothbrush of claim 13 wherein the flexible portion of the head is movable between:

(1) a rest state wherein the upper surface of the flexible portion of the head is planar; and

(2) a use state wherein the flexible portion of the head deflects into the gap and the upper surface of the flexible portion of the head is concave and the lower surface of the flexible portion of the head is convex.

16. The toothbrush of claim 15 wherein the flexible portion of the head transitions from the rest, state into the use state in response to pressure being applied to the upper surface of the flexible portion, the flexible portion automatically returning to the rest state upon release of the pressure.

17. A toothbrush comprising:

a handle;

a head extending from a proximal end to a distal end along a longitudinal axis, the head comprising a base portion formed of a rigid plastic material and a flexible portion formed of an elastomeric material coupled to the base portion, a first longitudinal section of the flexible portion spaced apart from the base portion by a gap that forms a transverse passageway through the head from a first side of the head to a second side of the head;

the flexible portion of the head having an upper surface and an opposing lower surface, wherein within the first longitudinal section of the flexible portion the upper surface and the lower surface are substantially planar and parallel to one another; and

tooth cleaning elements secured to the flexible portion of the head and extending from the upper surface of the flexible portion;

wherein the base portion of the head has a top surface adjacent to the gap and an opposing bottom surface, and wherein the top surface is concave and the bottom surface is convex.

18. The toothbrush of claim 17 wherein a portion of the flexible portion of the head is embedded in a depression in the base portion of the head.

19. The toothbrush of claim 17 wherein a second longitudinal section of the flexible portion is coupled to the base portion adjacent the distal end of the head and a third longitudinal section of the flexible portion having a proximal end surface, the proximal end surface coupled to the base portion at the proximal end of the head, the first longitudinal section of the flexible portion being located between the second and third longitudinal sections of the flexible portion.