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. 19, 2013
Filed:
Mar. 07, 2012
Kouji Katou, Tokyo, JP;
Kazuya Takeuchi, Tokyo, JP;
Ichiro Kusakari, Tokyo, JP;
Osamu Itagaki, Tokyo, JP;
Takahiro Nagaoka, Tokyo, JP;
Kouji Katou, Tokyo, JP;
Kazuya Takeuchi, Tokyo, JP;
Ichiro Kusakari, Tokyo, JP;
Osamu Itagaki, Tokyo, JP;
Takahiro Nagaoka, Tokyo, JP;
Max Co., Ltd., Tokyo, JP;
Abstract
An electric power tool 'A' operates a working partby repeating rotation of a motorin a normal direction and in a reverse direction one or more times. The motorincludes a brushless motor. Sensors H for detecting a position of a rotorare provided on the motorso as to be advanced by an electrical angle of 30°±θ° from an intermediate position between respective stator teethin a direction of the normal rotation of the rotor. A control partfor controlling the rotation of the motorcontrols a driving signal of the motorbased on the results of detection by the sensors H. Moreover, the control partselects a detection signal of the sensors H so that relation between the rotorand the detection signal of the sensors H is equivalent in either of the normal rotation and the reverse rotation of the rotor