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. 09, 2021
Filed:
Nov. 29, 2018
Applicant:
Koki Holdings Co., Ltd., Tokyo, JP;
Inventor:
Yuuki Takeda, Ibaraki, JP;
Assignee:
KOKI HOLDINGS CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25F 5/00 (2006.01); B24B 23/02 (2006.01); B24B 49/10 (2006.01);
U.S. Cl.
CPC ...
B25F 5/008 (2013.01); B24B 23/02 (2013.01); B24B 23/028 (2013.01); B24B 49/10 (2013.01); B25F 5/00 (2013.01);
Abstract
The electric tool including a motor having a stator and a rotor, a rotation shaft integrally rotating with the rotor, a casing accommodating the motor, a ventilating window disposed in the casing, a cooling fan sucking an air through the ventilating window to cool off the motor, a magnetic body disposed to the rotation shaft, a magnetic detection unit detecting a rotational position of the magnetic body, and a circuit substrate on which the magnetic detection unit is mounted. The circuit substrate and the magnetic body are disposed to be isolated from a wind path of a cooling wind generated by rotation of the cooling fan.