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:
Apr. 13, 2010
Filed:
Jun. 01, 2004
Yoshio Okumura, Kaga, JP;
Akira Fujiwara, Wako, JP;
Yoshio Okumura, Kaga, JP;
Akira Fujiwara, Wako, JP;
Daido Kogyo Co., Ltd., Ishikawa, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A chain pin manufacturing method that requires only one heat treatment step of forming a boundary part composed of (V, Cr)Cby Cr and C in a base material at first through a cementation process in a VCl atmosphere by using Cr-rich steel as the pin base material and of forming a surface layer composed of VC. A Cr content in the boundary part decreases gradually toward the base material and the surface layer and the boundary part is not clearly divided. The inventive manufacturing method is simple and enables to manufacture the pin having high abrasion resistance and suitably used in a severe environment like a timing chain.