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:
Oct. 15, 2019
Filed:
Aug. 21, 2015
Hitachi Koki Co., Ltd., Tokyo, JP;
Tomomasa Nishikawa, Hitachinaka, JP;
Yoshiichi Komazaki, Hitachinaka, JP;
Tetsuhiro Harada, Hitachinaka, JP;
Norikazu Baba, Hitachinaka, JP;
Koki Holdings Co., Ltd., Tokyo, JP;
Abstract
In order to provide a driver for reducing reaction generated to a driver main body, the driverincludes a nose portionprovided in a housingand extending in a longitudinal direction, the nose portion being configured to allow a fastener to pass therethrough, a plungerconfigured to move in an impact direction parallel to the longitudinal direction to impact the fastener through the nose portion, a weight, and a coil springconfigured to be compressed by a motorin the longitudinal direction. a release of the compression causing the plungerto move in the impact direction, while causing the weightto move in a counter-impact direction which is away from the plunger. The coil springis provided between the plungerand the weight. The coil spring has one end portion urging the plunger, and another end portion urging the weight