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:
Aug. 17, 2010
Filed:
Feb. 08, 2007
Masaaki Nishida, Anjo, JP;
Satoru Kasuya, Hazu, JP;
Masashi Kito, Anjo, JP;
Yoshihisa Yamamoto, Anjo, JP;
Akitomo Suzuki, Anjo, JP;
Masato Fujikawa, Toyota, JP;
Ryuji Ibaraki, Nishikamo-gun, JP;
Masatoshi Adachi, Nishikamo-gun, JP;
Tsuyoshi Mikami, Nissin, JP;
Hideo Ono, Toyota, JP;
Masaaki Nishida, Anjo, JP;
Satoru Kasuya, Hazu, JP;
Masashi Kito, Anjo, JP;
Yoshihisa Yamamoto, Anjo, JP;
Akitomo Suzuki, Anjo, JP;
Masato Fujikawa, Toyota, JP;
Ryuji Ibaraki, Nishikamo-gun, JP;
Masatoshi Adachi, Nishikamo-gun, JP;
Tsuyoshi Mikami, Nissin, JP;
Hideo Ono, Toyota, JP;
Aisin AW Co., Ltd., Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aishin Kako Kabushiki Kaisha, Toyota, JP;
Abstract
Lubricating oil supply holes are drilled into a first member that is fitted to a plurality of first annular plates by a spline. Of splines to which each lubricating oil supply hole corresponds, lubricating oil grooves provided in the plurality of first annular plates do not overlap the splines on at least one of the front and rear surfaces of the first annular plates, and therefore lubricating oil flowing out of the lubricating oil supply holes is dispersed in a circumferential direction and flows from the inner periphery to the outer periphery of the first annular plates, rather than gathering in each lubricating oil groove and flowing in an outer peripheral direction. As a result, a force generated by an axial lubricating oil flow, which acts in a direction for causing the second annular plates to contact friction materials on the first annular plates, is suppressed, leading to a reduction in drag torque.