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:
Feb. 07, 2017
Filed:
May. 26, 2010
Kiyoshi Hasegawa, Yokohama, JP;
Shuuji Adachi, Tokyo, JP;
Mitsuo Uchiyama, Yokosuka, JP;
Yoshirou Noguchi, Yokosuka, JP;
Takahiro Iwasaki, Isehara, JP;
Kimio Nishimura, Yokohama, JP;
Kiyoshi Hasegawa, Yokohama, JP;
Shuuji Adachi, Tokyo, JP;
Mitsuo Uchiyama, Yokosuka, JP;
Yoshirou Noguchi, Yokosuka, JP;
Takahiro Iwasaki, Isehara, JP;
Kimio Nishimura, Yokohama, JP;
NISSAN MOTOR CO., LTD., Yokohama-Shi, JP;
Abstract
A boring cutter body () is inserted into a circular hole () and is rotated and moved in an axial direction, whereby screw-shaped groove parts () are formed by using a tool bit () provided on a tip end of an outer peripheral portion, and broken surfaces () are formed by breaking tips of ridge parts generated by formation of the groove parts (). Moreover, the groove parts () are processed through electric discharge machining using a wire electrode () provided to the boring cutter body () behind the tool bit () in the rotating direction, thereby forming finely roughened portions () having more finely roughened shapes than the broken surfaces ().