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. 06, 2023
Filed:
Jan. 31, 2019
Kabushiki Kaisha F.c.c., Hamamatsu, JP;
Shintaro Yagi, Shizuoka, JP;
Katsumasa Kiuchi, Shizuoka, JP;
Kabushiki Kaisha F.C.C., Shizuoka, JP;
Abstract
Provided are a method for manufacturing a wet friction plate, whereby efficiency of the work of forming a fine groove on a friction material can be improved, the wet friction plate, and a wet multiple-plate clutch device having the wet friction plate. In the method for manufacturing a wet friction plate, a core metaland a friction materialare prepared, a resin layeris formed on the core metal, the friction material is attached onto the resin layer, and a fine grooveis formed in the friction material. Specifically, irradiation of a laser beam L is started on an exposed portionof the core metal. A laser headis displaced in an annular shape while continuously emitting the laser beam. Thus, annular fine groovesandare formed in the exposed portion of the core metal and the friction material.