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:
Jun. 02, 1998
Filed:
Feb. 24, 1997
Applicant:
Inventors:
Teruo Takahashi, Tochigi-ken, JP;
Toshiaki Sato, Tochigi-ken, JP;
Assignees:
Nippon Piston Ring Co., Ltd., , JP;
Honda Giken Kogyo K.K., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
75246 ; 75231 ; 75243 ; 428550 ;
Abstract
A valve seat for an internal combustion engine provided with a base member, wherein said base member comprises; a matrix of iron-based alloy comprising (a) carbon in a range of 0.5-1.5 weight % based on weight of said base member, (b) at least one element selected from a group consisting of nickel, cobalt and molybdenum in a range of 2.0-20.0 weight % in total based on weight of said base member and (c) iron as a remainder; cobalt-based hard particles dispersed in said matrix in a range of 26-50 weight % based on weight of said base member.