Toothbrush

• US 5,742,972 A
• Filed: 02/21/1997
• Issued: 04/28/1998
• Est. Priority Date: 11/02/1993
• Status: Expired due to Term

• Current Assignee: Gillette Company (The Procter & Gamble Company)
• Original Assignee: Gillette Canada Inc (The Procter & Gamble Company)
• Inventors: Loew, Christopher, Breuer, Miklos M., Sabato, Alberto B., Spencer, Jean L., Bredall, William A., McDowell, Douglas J., Wreford, Stanley, Gavino, Ximena A., Vidra, James D., Meessmann, Jeffrey Scott
• Primary Examiner(s): CHIN, RANDALL E
• Application Number:
  US08/803,704
• Time in Patent Office: 431 Days
• Field of Search: 15/DIG. 5, 15/167.1, 15/207.2
• US Class Current: 15/167.1
• 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

Abstract

The present invention relates to a toothbrush which exhibits superior interproximal and gingival margin cleaning. The toothbrush includes an elongated handle member connected to a toothbrush head member. The head is divided into two regions. A "toe" region is defined as the part of the head which is furthest from the handle and a "heel" region is the portion of the head which is closest to the handle. A multiplicity of bristles extend from the heel region of the head; the distal ends of these bristles form a longitudinally aligned concave shape when viewed on end. Likewise, a multiplicity of bristles extend from the toe region of the head, wherein said bristles extending from the toe portion of the head are at least as tall as the general height of said bristles extending from the heel portion when viewed from the side and wherein the side profile view of the distal ends of the bristles extending from the toe portion form a generally linear surface which forms an angle relative to the general plane of the bristles extending from the heel portion of from 0° to about 45° declining from the edge of the toe portion distal to the heel portion to the edge of the toe portion which is proximal to the heel portion.

Claims

1. A toothbrush exhibiting interproximal and gingival margin cleaning comprising:

(a) an elongated handle member;

(b) an elongated head member connected to one end of the handle member comprised of a toe portion distal to the handle and a heel portion proximal to the handle and adjacent said toe portion;

(c) a multiplicity of bristles extending from the heel portion, the free ends of said bristles forming a longitudinally aligned concave groove which extends the entire length of the heel portion and wherein the free ends of the bristles of the heel portion proximal to said toe portion form a generally linear profile when viewed from the side; and

(d) a multiplicity of bristles extending from the toe portion, wherein the side profile view of the free ends of all of the bristles extending from the toe portion forms a generally linear surface which forms an obtuse angle relative to said generally linear profile of the free ends of the bristles extending from the heel portion proximal to said toe potion and wherein the side profile of said toe portion bristles results in a wedge shape with the tallest toe portion bristles being at the end of the head which is distal to said handle.

2. A toothbrush according to claim 1 wherein the head member provides a generally planar surface proximal to the bristles.

3. A toothbrush according to claim 2 wherein the multiplicity of bristles extending from the toe portion extend perpendicular to the toe portion of the head member.

4. A toothbrush according to claim 3 wherein the side profile view of the free ends of the bristles extending from the toe portion form a generally linear surface which forms an obtuse angle of more than about 135°

relative to said generally linear profile of the free ends of the bristles extending from the heel portion proximal to said toe portion.

5. A toothbrush according to claim 4 wherein the side profile view of the free ends of the bristles extending from the toe portion form a generally linear surface which forms an obtuse angle of from about 155°

to about 170°

relative to said generally linear profile of the free ends of the bristles extending from the heel portion proximal to said toe portion.