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:
Sep. 04, 2012
Filed:
Jan. 15, 2008
Naoto Yamaoka, Kyoto, JP;
Takamasa Yamashita, Kyoto, JP;
Naoto Yamaoka, Kyoto, JP;
Takamasa Yamashita, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
A heat sink has a plurality of radially extending radiating fins, which are arranged annularly on the outer circumferential surface of a cylindrical base to be integral with that surface. The base is formed to have a cylindrical shape having a center axis. The base is formed to be solid-core. The heat sink is ground such that a cooling object contact portion having a generally cylindrical shape projects from the end surface of the heat sink in the axial direction. An annular groove is ground out along the outer circumference of a contact surface of the cooling object contact portion. An attaching member is attached on the outer circumferential surface of the cooling object contact portion, and a pressure application portion is entirely pressed by a pressing machine. The pressure application portion is plastically deformed outward in the diameter direction, so that the attaching member is fixed in between.