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:
Feb. 23, 1993
Filed:
Jun. 01, 1992
Applicant:
Inventor:
Michael J Gorman, Royal Oak, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277 35 ; 277 19 ; 277 42 ; 277 70 ; 277139 ; 277142 ; 277175 ; 277216 ;
Abstract
A seal for the rotating annular interface between a transmission input shaft and surrounding piston drum is uniquely configured as a single, integral part. A circular trough with two annular side walls is machined into the input shaft. The seal includes two annular side rings sized to contact the inside of the piston drum radially, and to contact the side walls of the trough axially. A bridging section joins the two side rails, and also preloads them into the trough side walls. Therefore, when hydraulic fluid is pumped between the side rails, it is prevented from leaking between the side rings and side walls and into the interface.