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. 06, 2004
Filed:
Sep. 12, 2002
Applicant:
Inventors:
Paul Richard Meernik, Redford, MI (US);
Thomas Arthur Perry, Washington, MI (US);
Martin Stephen Kramer, Clarkston, MI (US);
Larry Edward Byrnes, Rochester Hills, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/12 ;
U.S. Cl.
CPC ...
F16J 9/12 ;
Abstract
An engine piston compression ring designed to reduce the negative effects of ring end butting and reduce blowby. The compression ring has a gap forming an angle with a longitudinal axis of the ring or with a radius drawn from the axis. A relieved portion is provided along the upper or inner side of the ring adjacent one end, depending upon the direction of the gap angle. The relieved portion slopes along the upper or inner side toward the one end where the longitudinal thickness of the ring is smallest.