Electric toothbrush

Details Electric toothbrush Electric toothbrush

1994-10-03

1995-07-25

Roberts, Jr., Edward L.

Brushing, scrubbing, and general cleaning

Machines

Brushing

74 57, A61C 1734, A46B 1302

Patent

active

054350344

ABSTRACT:
An electric toothbrush having separable handle and brush segments, a rotating motor shaft extending exteriorly of the handle segment, and a reciprocating toothed rack in the brush segment which engages and imparts a counter-rotating movement to a plurality of tufts on the brush head. A cylindrically shaped gear mounts to and is axially movable on the motor shaft when the brush and handle segments are attached together. First and second lifting cams configured as elliptical flanges lying in oblique planes are provided in radially spaced relationship on the exterior surface and interior bore hole of the gear, respectively. Respective first and second guide grooves are associated with the lifting cams and the reciprocal toothed rack whereby rotation of the gear generates a long stroke of the rack through the interaction of the first and second lifting cams and guide grooves.

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