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:
Jan. 28, 2014
Filed:
Aug. 13, 2010
John A. Diemer, Farmington Hills, MI (US);
Edward J. Billings, Ann Arbor, MI (US);
Joakim Hogberg, Vanersborg, SE;
James M. Partyka, Clarkston, MI (US);
Robert Neil Paciotti, White Lake, MI (US);
John A. Diemer, Farmington Hills, MI (US);
Edward J. Billings, Ann Arbor, MI (US);
Joakim Hogberg, Vanersborg, SE;
James M. Partyka, Clarkston, MI (US);
Robert Neil Paciotti, White Lake, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A dual clutch actuation device generates the axial compression force required to compress a first and second set of frictional elements of a dual clutch module. Dual clutch actuation device includes a first and second annular piston. The annular pistons are arranged in concentric annular piston slots. Together the piston and annular slots form annular piston chambers. The actuation device further includes a first set of wiper seals and a second set of wiper seals disposed in a first and a second annular channel in each of the annular pistons. Advantageously, contamination of the piston chambers is reduced or eliminated through the wiping or cleansing action of the first and second set of wiper seals against walls of the annular slots formed in the housing of the actuation device.