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:
Nov. 02, 2021
Filed:
Jun. 29, 2018
Koki Holdings Co., Ltd., Tokyo, JP;
Takuya Yoshinari, Ibaraki, JP;
Hideyuki Tanimoto, Ibaraki, JP;
Koki Holdings Co., Ltd., Tokyo, JP;
Abstract
Provided is a power tool capable of performing braking in which deterioration and breakage of elements are inhibited. In a brake control, an arithmetic unit: performs a switching control of a combination of any of upper arm side Q-Qswitching elements and any of lower arm side switching elements Q-Qwhile sequentially switching the elements; and causes a current to flow in a closed loop (a closed loop in the same direction as during driving of the power tool) in order through any of the upper arm side Q-Qswitching elements, stator coils, any of the lower arm side switching elements Q-Q, and a first diode bridge