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:
Aug. 16, 2011
Filed:
Mar. 24, 2008
Applicants:
John C. Lahrman, Muskegon, MI (US);
Steven J. Sytsma, Muskegon, MI (US);
Inventors:
John C. Lahrman, Muskegon, MI (US);
Steven J. Sytsma, Muskegon, MI (US);
Assignee:
Mahle Engine Components USA, Inc., Muskegon, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A piston has a body with a first circumferentially disposed groove. A first ring is movably disposed within the first groove. The first ring defines an inner circumferential groove. A blocking ring is at least partially located in the groove of the first ring and the groove of the piston. One or more vent passages may connect a first volume in the piston to a second volume outside the piston.