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:
Jan. 13, 2015
Filed:
Mar. 29, 2007
Applicants:
Yoshio Okumura, Kaga, JP;
Mitsuru Yasuta, Kaga, JP;
Yukihiro Kishi, Kaga, JP;
Inventors:
Assignee:
Daido Kogyo Co., Ltd., Ishikawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 7/06 (2006.01); F16G 13/02 (2006.01); B32B 9/00 (2006.01); B32B 19/00 (2006.01); C23C 10/52 (2006.01); C23C 10/14 (2006.01); C23C 10/16 (2006.01); C23C 10/28 (2006.01); C23C 12/00 (2006.01); C23C 12/02 (2006.01);
U.S. Cl.
CPC ...
C23C 10/52 (2013.01); C23C 10/14 (2013.01); C23C 10/16 (2013.01); C23C 10/28 (2013.01); C23C 12/00 (2013.01); C23C 12/02 (2013.01); F16G 13/02 (2013.01);
Abstract
There is provided a wear-resistant chain having a high durability even in severe use environments such as those of a timing chain of an engine even though it is highly efficient and productive. A miniaturizing agent containing silicon is doped in a vanadium cementation process of a base material of steel. Vanadium carbide forming a surface-hardened layer contains a secondary phase composed of an amorphous structure containing silicon within crystal grains and a crystal grain size of the vanadium carbide is miniaturized to 1 μm or less.