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:
Oct. 22, 1991
Filed:
Oct. 19, 1989
Applicant:
Inventors:
Joao A Cullen, Ann Arbor, MI (US);
Miguel N Azevedo, Osasco, BR;
Assignee:
Metal Leve S.A., San Paolo, BR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
92208 ; 92261 ; 1231 / ; 277 24 ; 277182 ; 277195 ; 277216 ;
Abstract
A substantially circumferential annular member is installed in the region defined by the rear face of a piston compression ring and the upper and lower walls and the bottom of the compression ring groove. The annular member moves within said room by the action of inertia forces arising out of the piston reciprocating motion, thereby preventing the build-up of carbon particles in the piston compression ring groove.