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:
Jul. 13, 1993
Filed:
Jul. 18, 1991
Applicant:
Inventor:
Steven F Baker, Bellevue, OH (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21K / ;
U.S. Cl.
CPC ...
29404 ; 298883 ; 264162 ; 264237 ; 264343 ; 264348 ;
Abstract
A composite seal ring has a porous main body and a non-porous insert molded into it. Differential rates of coolant absorption between the porous main body and non-porous insert cause the whole ring to swell into a regular pattern of distortion. In order to compensate, the seal ring, after initial machining, is pre-soaked to simulate use and deliberately cause the same kind of distortion. It is then lapped flat from its distorted state.