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:
Mar. 20, 2018
Filed:
Jan. 13, 2016
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Wu Chen, Nanjing, CN;
Fengqin Zhou, Nanjing, CN;
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Abstract
An electric power tool includes a motor, a power supply circuit for supplying power to the motor, and a control device which is able to measure current of the motor and control duty cycle of the power supply circuit. When the measured current of the motor is greater than a predetermined current value, the duty cycle of the power supply circuit is increased to a first predetermined value. If the current of the motor is still greater than the predetermined current value, the duty cycle of the power supply circuit is decreased to a second predetermined value such that the current of the motor is equal to or less than the predetermined current value.