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:
Jun. 26, 2007
Filed:
Feb. 18, 2005
Chen Yu LI, Tomakomai, JP;
Jin Takahashi, Nagoya, JP;
Chen Yu Li, Tomakomai, JP;
Jin Takahashi, Nagoya, JP;
Dynax Corporation, Chitose-shi, JP;
Abstract
The object of the present invention is to provide an optimizing method for a groove structure of a friction disk of a wet-type friction engaging element, which can reduce drag torque by increasing outgoing flow of lubricating oil on the friction surface and increasing the content of air in the lubricating oil. The optimizing method for a groove structure of a friction disk of a wet-type friction engagement element comprising a sectoral inner sectionof a groovewidening inwardly formed on the surface of a friction member of the wet-type friction engaging element, wherein the outgoing flow per groove area is calculated based on the entrance angle (opening angle) θ of the inner sectionand the ratio h/w of the full length w of the grooveto the length h of the inner section; and then a range of the entrance angle (opening angle) θ of the inner section and the ratio h/w of the full length w of the groove to the length h of the inner section is determined where the outgoing flow per groove area is at least a certain value.