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:
Sep. 25, 1984
Filed:
Oct. 19, 1983
Applicant:
Inventors:
Genkichi Umeha, Tokyo, JP;
Takeji Tsuchiya, Saitama, JP;
Assignee:
Nippon Piston Ring Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277216 ; 277-1 ;
Abstract
In an oil scraper ring in which an expander is arranged on the inner peripheral surface of an oil scraper ring proper, the oil scraper ring is manufactured to present the configuration of a perfect circle in its unstressed state with a free engaging gap cut into the ring.