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.

Date of Patent:
May. 24, 1983

Filed:

May. 27, 1980
Applicant:
Inventor:

Yusuke Gotoda, Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
1231 / ; 92177 ; 277160 ; 277217 ;
Abstract

A piston ring for use with an oblong piston and cylinder has a gap at one end. A resilient corrugated expander is positioned behind the piston ring and within the piston ring groove in the piston. The expander also has a gap and the two gaps are adjacent each other and in close alignment.


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