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. 03, 2012
Filed:
Apr. 05, 2010
Gary L. Jones, Farmington Hills, MI (US);
Farzad Samie, Franklin, MI (US);
Chunhao J. Lee, Troy, MI (US);
Kumaraswamy V. Hebbale, Troy, MI (US);
Andrew L. Bartos, Clarkston, MI (US);
John I. Manole, Chesterfield, MI (US);
Gary L. Jones, Farmington Hills, MI (US);
Farzad Samie, Franklin, MI (US);
Chunhao J. Lee, Troy, MI (US);
Kumaraswamy V. Hebbale, Troy, MI (US);
Andrew L. Bartos, Clarkston, MI (US);
John I. Manole, Chesterfield, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A normally-engaged clutch is provided having a friction-element with a first side and an opposing second side, a first plate configured for pressing against the friction-element on the first side, and a second plate configured for pressing against the friction-element on the second side. The clutch also includes a biasing device configured to apply a first force to the second plate for pressing the second plate against the friction-element to engage the clutch. Additionally, the clutch includes an apply piston for applying a second force to the first plate, and a release piston for applying a third force to the second plate. The clutch is disengaged when the second plate is pushed away from the friction-element by the third force in the absence of the second force, and is engaged when the first plate is pressed against the friction-element by the second force.