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. 20, 2024
Filed:
Dec. 24, 2019
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Dezhong Yang, Nanjing, CN;
Chao Xian, Nanjing, CN;
QingXiao Mei, Nanjing, CN;
Yuwei Yang, Nanjing, CN;
Tianxiao Xu, Nanjing, CN;
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Abstract
An electric power tool includes: a motor; a driving circuit configured to drive the motor to output motive power; a control module configured to control the driving circuit; an energy storage element connected to the driving circuit; a current limiting element connected in series with the energy storage element and configured to charge the energy storage element with a first current; a switching element electrically connected in series with the energy storage element, connected in parallel with the current limiting element, and configured to charge or discharge the energy storage element with a second current. The electric power tool can avoid the occurrence of adverse situations such as generating electric sparks at the connection terminals of the electric power tool and of a battery pack when the battery pack is inserted into the electric power tool.