Adjustable bristle length toothbrush

Details Adjustable bristle length toothbrush Adjustable bristle length toothbrush

1991-04-03

1992-09-01

Hornsby, Harvey C.

Brushing, scrubbing, and general cleaning

Implements

Brush or broom

15169, A46B 1500

Patent

active

051427265

ABSTRACT:
A toothbrush with variable adjustment of operative bristle length, characterized by inclusion of an attenuate flexible pivotal appendage secured to the brush toward the handle end, extending over a depression midway along the length of the brush body. The appendage includes an aperture or a grid of holes encompassing the bristles and is positioned at the base of the bristles when the appendage is at rest, or in a retracted position. Digital pressure applied on the appendage above the depression, causes a lever action whereby the device moves perpendicularly to the bristles. A tether is provided to prevent the travel of the appendage beyond the bristle ends.

REFERENCES:
patent: 1303500 (1919-05-01), Rosenberg
patent: 2144408 (1939-01-01), Holmes
patent: 2613678 (1952-10-01), Mandato
patent: 3110053 (1963-11-01), Surabian
patent: 3172139 (1965-03-01), Wire
patent: 3737936 (1973-06-01), Uosaki
patent: 3803663 (1974-04-01), Weihrauch
patent: 4149293 (1979-04-01), Raaf et al.
patent: 4152806 (1979-05-01), Raaf et al.
patent: 4860692 (1989-08-01), Beard

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