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:
Jul. 29, 2014
Filed:
Sep. 28, 2010
Applicants:
Takanori Kuno, Nagoya, JP;
Tomohiro Nakano, Nagoya, JP;
Takayuki Sakakibara, Nagoya, JP;
Masami Wakita, Nagoya, JP;
Shingo Mimura, Nagoya, JP;
Inventors:
Takanori Kuno, Nagoya, JP;
Tomohiro Nakano, Nagoya, JP;
Takayuki Sakakibara, Nagoya, JP;
Masami Wakita, Nagoya, JP;
Shingo Mimura, Nagoya, JP;
Assignee:
Chuo Hatsujo Kabushiki Kaisha, Nagoya-Shi, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
A high-strength spring steel and a spring are provided that have superior corrosion fatigue strength. The spring steel comprises, in mass percent, 0.35-0.55% C, 1.60-3.00% Si, 0.20-1.50% Mn, 0.10-1.50% Cr, and at least one of 0.40-3.00% Ni, 0.05-0.50% Mo and 0.05-0.50% V, the balance being substantially Fe and incidental elements and impurities.