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:
Jun. 18, 2024
Filed:
Apr. 12, 2019
Koki Holdings Co., Ltd., Tokyo, JP;
Ken Miyazawa, Ibaraki, JP;
Ryo Suzuki, Ibaraki, JP;
Koki Holdings Co., Ltd., Tokyo, JP;
Abstract
An electric tool is provided which enables preventing adherence to a rotor core of dust, such as iron powder, that has entered a motor. The electric tool includes a cylindrical motor housingaccommodating and supporting the motor, and a cooling fan attached to a rotation shaft of the motor, and cools the motor by flowing air generated by the cooling fan toward the back or front of the motor housing, wherein a fan guideguiding cooling air is provided in front of an insulatorof a statorof the motor. The fan guideincludes a first cylindrical partwhich covers a rotation space of the cooling fan, a guide surface, and a second cylinderwhich extends backward from the guide surface, wherein a labyrinth spaceis formed by the insulatorand the second cylinder. By providing the labyrinth space, it is possible to block the flow of cooling air from the outer peripheral side of the statorto an opening