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:
Aug. 03, 2010
Filed:
Jan. 17, 2008
Hiroki Uchida, Ibaraki, JP;
Hiroki Uchida, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
To provide a cordless power tool which can suppress heat generation of a protection unit and prevent the erroneous operation. A cordless power toolincludes a body casing; a batterywhich is detachably attached to the body casingand can supply electric power; a motorwhich is housed in the body casing, and generates rotation force by the electric power of the battery; a cooling fanwhich rotates by the rotation force of the motor; and a protection unitwhich shuts off the power supply to the motor, in accordance with a detection result of the state of the battery, so that the batterydoes not enter an overdischarge state or an overcurrent state. Herein, a passage of cool air generated by the cooling fanis formed in the body casing, and theprotection unitis arranged so that at least its part is located in the passage of the cool air.