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:
Dec. 01, 2020
Filed:
Dec. 21, 2017
GM Global Technology Operations Llc, Detroit, MI (US);
John M Kremer, Sterling Heights, MI (US);
Huaxin Li, Rochester Hills, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A friction clutch assembly for an automatic transmission, a friction clutch plate, and a method of forming a friction clutch plate are provided. The method includes providing a friction material layer for a face of the friction clutch plate and cutting the friction material layer with a laser beam to form a plurality of grooves within the friction material layer. In one version, a friction plate for the friction clutch assembly includes an annular core plate having first and second opposed faces and defining an outer edge and an inner edge. Friction material is affixed to at least one of the first and second opposed faces. The friction material defines a plurality of grooves within the friction material, each groove being bordered by friction material having a ridge. The cross-section of the ridge has a corner having a radius of curvature that is less than 300 microns.