Robert A Erwin

US Patent:

53077300, May 3, 1994

Filed:

Nov 13, 1992

Appl. No.:

7/976032

Inventors:

Robert D. Erwin - Brownsburg IN

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F01B 3100
F16D 5522
F16F 118

US Classification:

92130A

Abstract:

A return spring (40,60) operable with piston means (30) for use in fluid operated friction torque transmission devices (11) including relatively rotatable members (12,13) carrying a plurality of torque plates (18,22), one of the members providing a fluid chamber (34) in which the piston means is reciprocable. Such a spring comprises flexible base means (41,61) carried within a recess (50,51) provided in the rotatable member and spring tab means (43,66) extending from the flexible base means and engageable with a wall (52) of the piston means; the tab means being movable with the piston means upon movement thereof in and out of the chamber in response to activation of the piston means.