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. 12, 2012
Filed:
Jul. 25, 2007
Applicants:
Hironobu Itoh, Chiba, JP;
Hiroaki Matsumura, Chiba, JP;
Kenji Takano, Chiba, JP;
Inventors:
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21K 1/04 (2006.01); B21J 1/04 (2006.01); F16C 33/64 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided is a blank structure for a ring member of a bearing in which a cut target surface after stainless steel is forged has uniform surface characteristics, and highly accurate cutting processing is enabled. A blank (), which is processed to an outer race () and an inner race () of a bearing, includes: a cylindrical portion () formed by forging a stainless-steel material, and having an inner circumferential surface () and an outer circumferential surface () entirely being surface eutectic carbides fragmented beds; and a clamp portion () provided to one end portion side of the cylindrical portion ().