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, 1998
Filed:
Jun. 11, 1997
Arthur Hall, III, Cicero, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
Power transmission torque transmitting assemblies, such as clutches and brakes, have an axially movable piston which is hydraulically actuated to engage and enforce frictional contact between a plurality of friction discs. Upon piston retraction during disengagement, a stroke adjustment mechanism establishes the retraction distance of the piston and thereby the free-running clearance in the torque transmitter. The stroke adjustment mechanism has a helical gear movable axially with the piston during engagement and disengagement. During engagement, the piston is free to rotate as required by a retainer plate to accommodate fall engagement with the torque transmitting assembly. During disengagement, a one-way assembly prevents rotation of the gear relative to a spring retainer plate and limits axial movement of the piston relative to the retainer plate to establish the disengaged position of the piston and the proper free-running clearance in the torque transmitting assembly.