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:
Jul. 17, 1990
Filed:
Jun. 09, 1989
Keiichi Ishikawa, Chuo, Wako-shi, Saitama-ken, JP;
Tadashi Tsuchiyama, Chuo, Wako-shi, Saitama-ken, JP;
Yasuyuki Suzuki, Tekunorando, Hosoe-cho, Inasa-gun, Shizuoka-ken, JP;
Hiroaki Hasegawa, Tekunorando, Hosoe-cho, Inasa-gun, Shizuoka-ken, JP;
Other;
Abstract
A wet frictional engagement apparatus comprising an input side member, an output side member, a wet friction member attached to one of the input side member and the output side member, an opposite member facing the friction member and attached to the other of the input side member and the output side member, and a device for applying pressure to engage the friction member and the opposite member. The wet friction member comprises a substrate, a plurality of first friction submembers mounted spaced apart on the substrate, and a plurality of second friction submembers mounted on the substrate each adjacent one of the first friction submembers forming a pair of submembers. Each pair of submembers is spaced from each adjacent pair by an oil groove. Each first friction member is relatively less oil-permeable and each second friction member is relatively more oil-permeable. In this manner, wet friction member has a different effective coefficient of friction depending on which direction relative motion between the friction member and the opposite member occurs when pressure is applied therebetween.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile