Electric toothbrushes

Details Electric toothbrushes Electric toothbrushes

1996-11-20

1998-03-31

Chin, Randall

Brushing, scrubbing, and general cleaning

Machines

Brushing

15 28, A46B 1302

Patent

active

057324328

ABSTRACT:
An electric toothbrush has an elongate shank and a drive shaft formed in two sections. The sections are drivingly coupled together by a coil spring. The shank is formed in two sections joined together by a flexible ribbed seal. The shank is able to flex while the drive shaft continues to run normally without adding strain to the electric motor which would increase electric power required. Rigid bars restrict the flexibility of the shank parts into a single plane.

REFERENCES:
patent: 1692980 (1928-11-01), Farmer
patent: 2379049 (1945-06-01), Tompkins
patent: 3822432 (1974-07-01), Skinner
patent: 4378804 (1983-04-01), Cortese, Jr.
patent: 5054149 (1991-10-01), Si-Hoe
patent: 5465444 (1995-11-01), Bigler

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