The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2007
Filed:
Feb. 26, 2004
Takahiro Ichihara, Kashiwara, JP;
Hajime Watanabe, Kashiwara, JP;
Hideki Fujiwara, Kitakatsuragi-gun, JP;
Minoru Mera, Kariya, JP;
Taku Adaniya, Kariya, JP;
Akinobu Kanai, Kariya, JP;
Naoki Usui, Kariya, JP;
Tomoharu Arai, Kariya, JP;
Takahiro Ichihara, Kashiwara, JP;
Hajime Watanabe, Kashiwara, JP;
Hideki Fujiwara, Kitakatsuragi-gun, JP;
Minoru Mera, Kariya, JP;
Taku Adaniya, Kariya, JP;
Akinobu Kanai, Kariya, JP;
Naoki Usui, Kariya, JP;
Tomoharu Arai, Kariya, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
A power transmission device includes a first one-way clutch that transmits a rotational power of a pulley to a rotating shaft, and a second one-way clutch that transmits a rotational power of a rotor of a motor to the rotating shaft. The first one-way clutch is of inner cam type in which an engagement cam-surface is formed in an outer periphery of a first inner ring, while the second one-way clutch is of outer cam type in which an engagement cam-surface is formed in an inner periphery of a second outer ring. This arrangement improves engagement performance of the first one-way clutch as well as reducing heat generation of the second one-way clutch, so that the lifetime of grease is prolonged.