Toothbrush and process for producing such a toothbrush

Patent metadata

Field	Value
Publication number	US-RE47468-E
Application number	US-46088802-A
Country	US
Kind code	E1
Filing date	Dec 20, 2002
Priority date	Dec 28, 2001
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

The invention relates to a toothbrush having a handle and a head part, on which bristle filaments and at least one flexible cleaning element are arranged. According to the invention, the at least one flexible cleaning element is arranged on a carrier element which consists of a hard material and is connected to the head part. The invention also relates to a process for producing such a toothbrush.

First claim

The invention claimed is:

1. A toothbrush head, comprising:
a bristle-carrying head part; bristle filaments and a cutout provided through the head part, the cutout including a bottom opening that is of a larger cross-section than an intermediate section of the cutout; and a flexible, non-bristle cleaning element arranged on a carrier element, the cleaning element being made of a first material and the carrier element being made of a second, harder material, the carrier element including a base and a resiliently configured extension, the base having a cross-section larger than the intermediate section of the cutout, and the extension having an intermediate portion and a bottom with a cross-section that is larger than the intermediate portion of the extension and the intermediate section of the cutout, the bottom of the extension being resiliently inserted through the intermediate section of the cutout and into the bottom opening to prevent ready release of the carrier element from the head part by a snap-fit connection.

2. The toothbrush head according to claim 1 , wherein the connection is sufficient to prevent detaching of the carrier element from the head part during use of the toothbrush.

3. The toothbrush head according to claim 1 , wherein the connection is non-releasable.

4. The toothbrush head according to claim 1 , wherein play between the carrier element and the head part at the cutout allows movement of the carrier element and the flexible cleaning element during use of the toothbrush.

5. The toothbrush head according to claim 1 , wherein the flexible cleaning element is arranged to massage gums of the user.

6. The toothbrush head according to claim 1 , wherein the flexible cleaning element is made from a thermoplastic elastomer.

7. The toothbrush head according to claim 1 , wherein the flexible cleaning element includes rubber.

8. The toothbrush head according to claim 1 , wherein the flexible cleaning element has a Shore A hardness of less than 90.

9. The toothbrush head according to claim 1 , wherein the material of the carrier element is a polypropylene, styrene-acrylonitrile, acrylonitrile-butadiene-styrene, polyurethane or polyester.

10. The toothbrush head according to claim 1 , wherein the flexible cleaning element and the carrier element are produced by two-component or multi-component injection molding and mated with a non-releasable connection.

11. The toothbrush head according to claim 1 , wherein the flexible cleaning element is inclined out of the vertical to come into contact with at least one of the bristle filaments.

12. The toothbrush head according to claim 1 , wherein the flexible cleaning element crosses over at least one of the bristle filaments.

13. The toothbrush head according to claim 1 , wherein the flexible cleaning element has a rod-like shape.

14. The toothbrush head according to claim 1 , wherein the carrier element is harder than the flexible cleaning element.

15. The toothbrush head according to claim 1 , wherein the cutout extends entirely through the head part.

16. The toothbrush head according to claim 1 , wherein the head part includes a plurality of cutouts and a plurality of flexible cleaning elements and carrier elements.

17. The toothbrush head according to claim 1 , further comprising a handle connected to the head part.

18. A toothbrush head, comprising:
a bristle-carrying head part; bristle filaments and a cutout provided on the head part; a flexible, non-bristle cleaning element arranged on a carrier element, the carrier element being of a harder material than that of the flexible cleaning element, the carrier element including an extension that extends into the cutout and is connected to the head part by a not readily releasable snap-fit connection of the carrier element within the cutout; and play between the carrier element and the head part at the cutout allows pivoting movement of the carrier element about an axis.

19. The toothbrush head according to claim 18 , wherein the axis is substantially perpendicular to the longitudinal axis of the head part.

20. The toothbrush head according to claim 18 , wherein the connection is sufficient to prevent detaching of the carrier element from the head part during use of the toothbrush.

21. The toothbrush head according to claim 18 , wherein the flexible cleaning element is made from a thermoplastic elastomer.

22. The toothbrush head according to claim 18 , wherein the flexible cleaning element includes rubber.

23. The toothbrush head according to claim 18 , wherein the flexible cleaning element has a Shore A hardness of less than 90.

24. The toothbrush head according to claim 18 , wherein the harder material of the carrier element is a polypropylene, styrene-acrylonitrile, acrylonitrile-butadiene-styrene, polyurethane or polyester.

25. The toothbrush head according to claim 18 , wherein the flexible cleaning element is inclined out of the vertical to come into contact with at least one of the bristle filaments.

26. The toothbrush head according to claim 18 , wherein the flexible cleaning element has a rod-like shape.

27. The toothbrush head according to claim 18 , wherein the cutout is provided through the head part and includes an end opening that is of a larger cross-section than an intermediate section of the cutout.

28. The toothbrush head according to claim 18 , further comprising a handle connected to the head part.

29. The toothbrush head according to claim 18 , wherein the head is also formed from a material that is harder than the flexible, non-bristle containing cleaning element so that a hard material to hard material snap-fit connection is formed.

30. The toothbrush head according to claim 18 , wherein the carrier extension is a snap-fitting element, and the snap-fitting element and the carrier form a single-piece body of the harder material.

31. The toothbrush head according to claim 18 , wherein the not-readily releasable snap-fit connection is formed by one of the extension and the head part resiliently deforming.

32. The toothbrush head according to claim 18 , wherein the cleaning element is non-releasably attached to the carrier element through two component or multi-component injection molding.

33. The toothbrush head according to claim 18 , wherein the head involves a plurality of cutouts and a plurality of snap-fit carrier elements.

34. A process for producing a toothbrush head comprising:
providing a head part with a cutout and with bristle filaments, the cutout having a bottom end opening that is of a larger cross-section than an intermediate section of the cutout; providing a flexible, non-bristle cleaning element coupled to a carrier element, the cleaning element being made of first material and the carrier being made of a second, harder material; providing the carrier element with a base having a cross-section larger than the intermediate section of the cutout and an extension having an intermediate portion and a resiliently configured bottom with a cross-section that is larger than the intermediate section of the extension and the intermediate section of the cutout; inserting the bottom of the extension through the intermediate section of the cutout and into the bottom end opening; and connecting the carrier

Assignees

• Trisa Holding Ag

Inventors

• Fischer Franz
• Strahler Reto

Classifications

• A46B7/04

  interchangeably {removable bristle carriers} · CPC title

• A61C17/3436

  Rotation around the axis perpendicular to the plane defined by the bristle holder · CPC title

• B29L2031/425

  Toothbrush · CPC title

• A46B2200/1026

  Gum massaging brush, i.e. specifically designed for massaging the gums · CPC title

• A46B15/0032

  with protrusion for polishing teeth · CPC title