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:
Jun. 13, 2023
Filed:
Mar. 13, 2018
Applicant:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Inventors:
Takumi Akada, Osaka, JP;
Hiromu Izumida, Osaka, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16F 1/04 (2006.01); C21D 9/02 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C25D 3/38 (2006.01); B32B 15/18 (2006.01); B32B 15/20 (2006.01); B32B 15/01 (2006.01); C25D 5/12 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); F16F 1/02 (2006.01); C23C 28/02 (2006.01); C21D 8/06 (2006.01);
U.S. Cl.
CPC ...
C21D 9/02 (2013.01); B32B 15/015 (2013.01); B32B 15/18 (2013.01); B32B 15/20 (2013.01); C22C 38/00 (2013.01); C22C 38/04 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C25D 3/38 (2013.01); C25D 5/12 (2013.01); F16F 1/021 (2013.01); F16F 1/045 (2013.01); C21D 8/06 (2013.01); C21D 2211/009 (2013.01); C23C 28/023 (2013.01);
Abstract
A canted coil spring includes a core wireformed of steel having a pearlite structure; and a copper plating layerformed of copper or a copper alloy and covering an outer circumferential surfaceof the core wire. The steel contains 0.5 mass % or more and 1.0 mass % or less carbon, 0.1 mass % or more and 2.5 mass % or less silicon, and 0.3 mass % or more and 0.9 mass % or less manganese, with the balance being iron and inevitable impurities. The copper plating layerhas a crystallite size of 220±50 Å.