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:
Mar. 16, 2004
Filed:
Mar. 07, 2002
Michael Joseph Gorman, Ann Arbor, MI (US);
Shushan Bai, Ann Arbor, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A hydraulically-operated clutch for an automatic transmission includes a clutch housing assembly with a clutch pack positioned therein. A movable piston is supported in the clutch housing assembly and defines an expandable chamber between the piston and clutch housing assembly. Pressurized fluid is provided to the expandable chamber to effect movement of the piston between engaged and disengaged positions with respect to the clutch pack. The piston and clutch housing assembly are configured such that only a small portion of the expandable chamber is pressurized when the piston is in the disengaged position, thereby providing improved response time for movement of the piston to the engaged position.