Patent ID: 6446294
Filing Date: 2002-09-10
Classification: A61C,Y10T

Abstract:
An electric toothbrush comprising:(i) an elongate body defining a handle and having an interior cavity formed therein, the cavity extending from a front to a rear end; (ii) a power source mounted within the cavity; (iii) an elongate drive shaft aligned from front to rear end driven rotatably by the power source; (iv) a camwheel mounted on the drive shaft; (v) a yoke with projecting arms, the camwheel axially reciprocating between the projecting arms thereby imparting a reciprocating movement to the drive shaft; (vi) a crankshaft section axially downstream from the yoke and being driven by the drive shaft; (vii) an output shaft parallel with the drive shaft; and (viii) a collar with a guide track eccentrically coupling the crankshaft section to the output shaft thereby imparting both lateral and reciprocating rotary motion to the output shaft.