Patent ID: 9468511
Filing Date: 2016-10-18
CPC Classification: A46B,A61C

Claim Text:
1. An electrically driven toothbrush comprising a handle housing; a brush head releasably connected to the handle housing and including a plurality of bristles; an output shaft connected to the brush head; a motor coupled to the output shaft via a linkage assembly, wherein a motor rotates the output shaft to pivot the brush head in a first direction and a second direction along the rotation arc; a first deformable member connected to a first side of the output shaft; and a second deformable member connected to a second side of the output shaft, wherein the first deformable member absorbs kinetic energy from the output shaft only at an end of the first direction of the rotation arc and imparts stored kinetic energy to the output shaft only at a beginning of the second direction of the rotation arc; and the second deformable member imparts stored kinetic energy to the output shaft only at a beginning of the first direction of the rotation arc and absorbs kinetic energy from output shaft only at an end of the second direction of the rotation arc.