Ergonomic topographic toothbrush

  • US 5,305,489 A
  • Filed: 04/13/1993
  • Issued: 04/26/1994
  • Est. Priority Date: 08/28/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. A toothbrush having an elongated handle, an integral brush head and a neck connecting said handle to said brush head, said head, neck and handle all being coaxial, said brush head having a longitudinal and a transverse axis with respect to said handle, and which brush head anchors a plurality of bristle tufts having free ends spaced from the head, comprising:

  • (a) a plurality of bristles, the free ends of said bristles disposed so as to form a bristle face defining alternating series of first and second substantially arctuate curves;

    (b) said first curves being substantially convexly arctuate in the longitudinal and transverse axes of said brush head;

    (c) said second curves being substantially concavely arctuate in the longitudinal axis of said brush head and substantially convexly arctuate in the transverse axis of said brush head;

    (d) said first and second curves defining a regulator and repeating pattern having substantially equal heights and substantially equal depths; and

    (e) said neck being substantially cylindrical, and said neck furthermore being substantially narrower in dimension than said handle and said brush head, and having on its surface means for enabling a user of said toothbrush to obtain bristle face motion along a line diagonal with respect to said longitudinal axis, said means comprising a plurality of helically wound threads of predetermined thread height and predetermined pitch, which threads are substantially the same radial distance from said longitudinal axis.

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