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. 04, 2011
Filed:
Jun. 19, 2007
Applicants:
Kazuhito Takashima, Yokohama, JP;
Minoru Ota, Yokosuka, JP;
Yoshitaka Uehara, Yokohama, JP;
Inventors:
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B 1/00 (2006.01); B21D 53/84 (2006.01);
U.S. Cl.
CPC ...
Abstract
A micro-concave portion machining method is provided for forming micro-concave portions on an inner circumferential surface of a cylindrical bore form in a workpiece. The micro-concave portion machining method includes performing mirror surface machining and subsequent plastic working on the inner circumferential surface. The plastic working on the inner circumferential surface forms a plurality of recesses with each of the recesses including a micro-concave portion.