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:
Nov. 29, 1988
Filed:
Jun. 15, 1987
Kazuhiko Mori, Toyota, JP;
Katsuhiko Ueda, Toyota, JP;
Soya Takagi, Toyota, JP;
Isao Torii, Obu, JP;
Shigeki Yamada, Obu, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Aisan Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
In an engine valve comprising a valve body of an iron base material, a Stellite or similar alloy is clad on the body using a laser beam with a sufficient energy to form a cladding layer as a valve face such that the iron from the body-forming iron base material is diffused into the cladding layer throughout its thickness through an interface layer between the cladding layer and the valve body, whereby the cladding layer has 5 to 15 wt % of iron diffused and the interface layer has an iron content continuously decreasing from the iron content of the body-forming iron base material to that of the cladding layer.