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:
May. 11, 1999
Filed:
Mar. 12, 1997
Applicant:
Inventors:
Nobuo Hara, Fujisawa, JP;
Makoto Abe, Fujisawa, JP;
Assignee:
Fuji Oozx, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
137-1 ; 251337 ; 251368 ; 1231883 ;
Abstract
The lower surface of a valve spring retainer is engaged on a valve spring in a valve operating mechanism of an internal combustion engine. The valve spring retainer is subjected to T6 treatment under JIS (Japanese Industrial Standard), and machined as finishing. The lower surface of the valve spring retainer is not machined, and remains as subjected to T6 treatment, thereby improving fatigue strength and wear resistance.