Electric toothbrush

Details Electric toothbrush Electric toothbrush

1994-07-25

1996-02-27

Roberts, Jr., Edward L.

Brushing, scrubbing, and general cleaning

Machines

Brushing

A61C 1734, A46B 1302

Patent

active

054937477

ABSTRACT:
An electric toothbrush with a control circuit capable of stopping the brushing operation when the brush is pressed against an user's teeth with an excessive force. The electric toothbrush comprises a housing which carries a shaft mounting a brush. The housing incorporates a rotary electric motor and a motion conversion mechanism which converts a rotational movement of the motor to a reciprocatory movement of the shaft for reciprocating said brush. A pressure sensor is provided to sense a brush pressure being applied back to the brush as a counter-action when pressing the brush against the user's teeth and to produce a stop signal when the sensed brush pressure exceeds a predetermined limit level.

REFERENCES:
patent: 4698869 (1987-10-01), Mierau et al.

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