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. 29, 2008
Filed:
Aug. 06, 2003
Katsuhiro Oomori, Ibaraki, JP;
Chikai Yoshimizu, Ibaraki, JP;
Masanori Watanabe, Ibaraki, JP;
Toshiyuki Nemoto, Loveland, OH (US);
Shinki Ohtsu, Ibaraki, JP;
Takuma Saito, Ibaraki, JP;
Katsuhiro Oomori, Ibaraki, JP;
Chikai Yoshimizu, Ibaraki, JP;
Masanori Watanabe, Ibaraki, JP;
Toshiyuki Nemoto, Loveland, OH (US);
Shinki Ohtsu, Ibaraki, JP;
Takuma Saito, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
In a motor-driven tool, a carbon brush partis arranged between a suction portand a commutatorof the motor and includes a cylindrical side wall. The cylindrical side walllocated on an outer periphery of the commutatoris provided with a tapered portionwhich grows wider toward the commutatorand grows narrower toward a coil endof the armature. Between the carbon brush partand the coil end, there is provided a heat radiating platemade of metal and adapted to be engaged with the carbon brush part