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:
Dec. 11, 2012
Filed:
Sep. 28, 2010
Takanori Kuno, Nagoya, JP;
Tomohiro Nakano, Nagoya, JP;
Takayuki Sakakibara, Nagoya, JP;
Masami Wakita, Nagoya, JP;
Shingo Mimura, Nagoya, JP;
Takanori Kuno, Nagoya, JP;
Tomohiro Nakano, Nagoya, JP;
Takayuki Sakakibara, Nagoya, JP;
Masami Wakita, Nagoya, JP;
Shingo Mimura, Nagoya, JP;
Chuo Hatsujo Kabushiki Kaisha, Nagoya-Shi, JP;
Abstract
The present application provides a high strength spring steel and a high strength spring that have superior corrosion fatigue strength. The spring steel comprises, in terms of percent by mass, 0.35-0.55% C, 1.60-3.00% Si, 0.20-1.50% Mn, 0.10-1.50% Cr and at least one element selected from 0.40-3.00% Ni, 0.05-0.50% Mo 0.05-0.50% V, the balance being at least substantially Fe and incidental elements and impurities.