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:
Apr. 12, 2016
Filed:
Dec. 10, 2014
Applicant:
Chervon Intellectual Property Limited, Road Town, VG;
Inventors:
Liang Chen, Nanjing, CN;
Zhongxin Xu, Nanjing, CN;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25B 21/02 (2006.01); B25B 15/02 (2006.01); B25B 15/00 (2006.01); B25B 17/00 (2006.01);
U.S. Cl.
CPC ...
B25B 21/02 (2013.01); B25B 15/02 (2013.01); B25B 15/00 (2013.01); B25B 17/00 (2013.01);
Abstract
An impact screwdriver includes a housing, a battery arranged in the housing, an electric motor arranged inside the housing, a transmission part driven by the electric motor and an impacting part, the impacting part including a hammer, an anvil matched to and hammered by the hammer, and an output shaft revolved by the anvil, wherein the rated voltage of the battery is less than or equal to 4.25V, the impact frequency of the hammer and the anvil is at least 30 Hz, and the ratio of the output torque (Nm) of the output shaft to the rated voltage of the battery is 1.8˜4.5.