Antonelli, Terry, Stout & Kraus, LLP.
Power tool and gear unit assembled therein
A power tool including a gear unit provided with a load moderating mechanism capable of reducing noise and prolonging service life. A coupling is force fitted with a spindle at a predetermined pressure allowing the spindle and the coupling to rotate relative to each other when a load exceeding a predetermined load is applied therebetween. A gear has a surround section having a convex and surrounding the coupling. The coupling has an abutment projection abutable against the convex and a damper projection. An elastic member is interposed between the damper projection and the surround section. Rotation of the gear is transmitted to the spindle through the elastic member and the coupling.
Hitachi Koki Co., Ltd.
F B Y B F B F
F16D B25F Y10T B23D F16D B24B F16D
inventional inventional additional inventional inventional inventional inventional
Junichi Kenichirou Takashi Hiroto
Kamimura Yoshida Kawamata Inagawa