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. 08, 2013
Filed:
Sep. 28, 2010
Applicants:
Tomohiro Nakano, Nagoya, JP;
Takanori Kuno, Nagoya, JP;
Takayuki Sakakibara, Nagoya, JP;
Masami Wakita, Nagoya, JP;
Shingo Mimura, Nagoya, JP;
Inventors:
Tomohiro Nakano, Nagoya, JP;
Takanori Kuno, 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 38/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A spring steel and spring having superior corrosion fatigue strength and a strength on the order of HRC 53 to HRC 56 are disclosed. The spring steel comprises a tempered martensite and 2.1 to 2.4% Si in terms of percent by mass of the total mass of the spring steel.