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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.:

US 11418094 B1

PDFFull Text
Date of Patent:
Aug. 16, 2022

Filed:

Feb. 23, 2018

Electric tool

Applicant:

Koki Holdings Co., Ltd., Tokyo, JP;

Inventors:

Akira Matsushita, Hitachinaka, JP;

Tomomasa Nishikawa, Hitachinaka, JP;

Yuta Noguchi, Hitachinaka, JP;

Takahiro Hirai, Hitachinaka, JP;

Assignee:

KOKI HOLDINGS CO., LTD., Tokyo, JP;

Attorney:

NovoTechIP International PLLC

Primary Examiner:

Quyen P Leung

Assistant Examiner:

Leda T Pham

Int. Cl.
CPC ...
H02K 11/33 (2016.01); H02K 11/215 (2016.01); B25F 5/00 (2006.01); H02K 7/14 (2006.01); H02K 9/06 (2006.01); H02K 21/16 (2006.01); H05K 1/02 (2006.01); H05K 1/18 (2006.01); H05K 7/20 (2006.01); B25D 17/20 (2006.01);
U.S. Cl.
CPC ...
H02K 11/33 (2016.01); B25F 5/008 (2013.01); H02K 7/145 (2013.01); H02K 9/06 (2013.01); H02K 11/215 (2016.01); H02K 21/16 (2013.01); H05K 1/0203 (2013.01); H05K 1/181 (2013.01); H05K 7/20909 (2013.01); B25D 17/20 (2013.01); B25D 2217/0061 (2013.01); B25D 2250/265 (2013.01); H02K 2211/03 (2013.01); H05K 2201/09027 (2013.01); H05K 2201/10151 (2013.01); H05K 2201/10166 (2013.01);
Abstract

Providing an electric tool with excellent cooling efficiency. An electric tool includes: a housing; a motor; a fan; a sensing portion; a switching portion; and a circuit board. The motoris accommodated in the housing. The motorincludes a stator, a rotor, and a rotating shaft. The rotoris rotatable relative to the stator. The rotating shaftis rotatable together with the rotor. The fanis configured to generate a cooling air flow inside the housing. The sensing portionis configured to detect a rotated position of the rotor. The switching portioncontrols a rotation of the rotor. The sensing portionand the switching portionare mounted on the circuit board. The stator, the fan, the sensing portion, the switching portion, and the circuit boardare arranged in the housingalong an axial direction of the rotorin the order of the fan, the sensing portion, the circuit board, the switching portion, and the stator

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