Toothbrushes

• US 5,184,368 A
• Filed: 12/13/1990
• Issued: 02/09/1993
• Est. Priority Date: 11/20/1990
• Status: Expired due to Fees

• Current Assignee: Oraline International B.V.
• Original Assignee: Ohad Paz
• Inventors: Holland, Neta
• Primary Examiner(s): Hornsby, Harvey C.
• Assistant Examiner(s): Brinson, Patrick F.
• Application Number:
  US07/627,098
• Time in Patent Office: 789 Days
• Field of Search: 15/167.1, 15/201, 15/191 R, 132/308
• US Class Current: 15/167.1
• 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 7/06 movably during use , i.e. the normal brushing action causing movement driven brush bodies A46B13/00

Abstract

A toothbrush includes a plurality of bristle holders spring-urged outwardly from the brush head. In one described embodiment, the springs are produced by a planar strip of elastic material stamped with a plurality of spirally-extending slits pressed out of the plane of the strip to produce a plurality of helically-extending springs underlying each of the bristle holders. In a second described embodiment, the springs are in deformable bellows-shaped elements each underlying one of the bristle holders. In some described embodiments, the brush head is pivotally mounted to the handle.

Claims

1. A brush including a handle at one end and a brush head at the opposite end, said brush head including a plurality of bristle holders and spring means normally urging at least some of the bristle holders outwardly but permitting their inward movement during use of the brush head;

characterized in that said spring means comprises;

a planar strip of elastic material formed with a plurality of spirally-extending slits at spaced locations of the planar strip underlying each of said bristle holders, to define a spirally-extending element integrally formed with said strip at each of said locations and in the same plane as said strip;

each of said spirally-extending elements being pressed out of the plane of said strip to produce a helically extending spring element underlying each of said bristle holders and decreasing in diameter from said strip to the bristle holder.

2. The brush according to claim 1, wherein said spring means urges all the bristle holders outwardly.

3. The brush according to claim 1, wherein said brush head includes at least two rows of bristle holders spring-urged outwardly separated by a row of bristle holders fixed to the brush head.

4. The brush according to claim 1, wherein said brush head is formed with a plurality of sockets each receiving one of said bristle holders, which bristle holders are urged outwardly of their respective sockets by their underlying helically-extending spring elements.

5. The brush according to claim 1, wherein said strip of elastic material is of stainless steel.

6. The brush according to claim 1, wherein said brush head is pivotally mounted to said handle about a pivot axis perpendicular to the longitudinal axis of the brush and handle.

7. The brush according to claim 6, wherein said pivot axis is located between the brush head and the handle and includes a tightenable pin for fixing the brush head at a predetermined angle with respect to the handle.

8. The brush according to claim 6, wherein said pivot axis passes through the brush head, the brush head being freely pivotal with respect to the handle so as always to assume a position parallel to the surface being brushed.

9. The brush according to claim 6, wherein said pivot axis is at the transverse axis of the brush head.

10. The brush according to claim 4, wherein said pivotal mounting comprises a universal joint permitting the brush head to be pivotted both parallel to an perpendicularly to the longitudinal axis of the handle and brush head.