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:
Apr. 17, 1990
Filed:
Dec. 08, 1988
Michael B Pociask, Martinsville, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An actuating piston assembly (10) for torque transmitting systems (11). The torque transmitting system (11) is encased within a housing member (12), and a mounting annulus (40) is presented from the housing member (12). The mounting annulus (40) has a radially outer, cylindrical surface (41) and a radially inner, cylindrical surface (42), the two surfaces (41 and 42) being preferably concentric. A seal retainer (45) is carried on the mounting annulus (40), and the seal retainer (45) has a substantially planar web portion (46). Outer and inner rims (50 and 51) are presented from the web portion (46) and frictionally engage the corresponding outer and inner surfaces (41 and 42) on the mounting annulus (40) to secure the seal retainer (45) thereto. A plurality of circumferentially spaced outer blocking flanges (52) extend radially outwardly from the outer rim (50), and a plurality of circumferentially spaced inner blocking flanges (53) extend radially inwardly from the inner rim (51). An outer seal (54) is secured between a the stop sruface (39) and the outer blocking flanges (52), and an inner seal (55) is similarly secured between the stop surface (39) and the inner blocking flanges (53). An annular, U-shaped piston (60) has a pair of radially spaced inner and outer skirt portions (62 and 63) which engage the inner and outer seals (55 and 54), respectively, to define a piston chamber (65).