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:
Dec. 02, 1997
Filed:
May. 15, 1996
Applicant:
Inventors:
Shuhei Adachi, Iwata, JP;
Junichi Inami, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02H / ;
U.S. Cl.
CPC ...
251368 ; 251359 ; 1231883 ; 1231888 ;
Abstract
A valve seat insert for use in forming a metallurgically bonded valve seat for a light alloy casting. The valve seat insert is comprised of a base formed from a sintered material selected from the group of ferrous, copper or nickel and is provided with a coating selected from the group of copper, tin, zinc, silicon, aluminum or silver or an alloy thereof. The coating forms an eutectic alloy with the aluminum of the cylinder head which eutectic alloy has a melting point lower than that of either the aluminum or the coating.