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:
Feb. 18, 1986
Filed:
Feb. 27, 1985
Applicant:
Inventors:
Takeshi Tsuchiya, Saitama, JP;
Shuji Samejima, Saitama, JP;
Assignee:
Nippon Piston Ring Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F02F / ;
U.S. Cl.
CPC ...
277216 ; 277-1 ; 277224 ; 2772 / ;
Abstract
A piston ring provided with a nitriding layer at entire surfaces of the piston ring body to form a compound layer and a diffusion layer, so that a compound layer is formed over the diffusion layer. From an outer peripheral surface of the piston ring body, the compound layer or both compound layer and diffusion layers is removed, and the plating or spraying layer is formed on the exposed diffusion layer or the exposed surface of the piston ring body.