Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1994-08-16
1996-04-09
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Machines
Brushing
15 221, 464 39, 464 37, 464182, 192110R, 192 561, 433118, 433131, 74 98, A46B 1302
Patent
active
055049613
ABSTRACT:
An electric toothbrush includes a handle section having a motor drive and a drive shaft coupled to the motor drive by a translating device, and a brush section having bristle assembly and a transmission shaft unit coupled to the drive shaft and driven by it to turn the bristle assembly back and forth alternatively, the transmission shaft unit consisting of a driving member, a connecting member, a driven member, and a compression spring, wherein the transmission shaft unit disengages from the drive shaft upon an overpressure to prevent damage to the bristles.
REFERENCES:
patent: 2183415 (1939-12-01), Thommies
patent: 2328270 (1943-08-01), Greenberg
patent: 2766470 (1956-10-01), Baker
patent: 2861462 (1958-11-01), Hussar
patent: 3696639 (1972-10-01), Gore et al.
patent: 4272973 (1981-06-01), Fu-Tsai
patent: 5099536 (1992-03-01), Hirabayashi
patent: 5311633 (1994-05-01), Herzog et al.
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