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:
Feb. 04, 2014
Filed:
May. 08, 2009
Tetsuhiro Harada, Hitachinaka, JP;
Tomomasa Nishikawa, Hitachinaka, JP;
Kazutaka Iwata, Hitachinaka, JP;
Shiniki Otsu, Naka, JP;
Nobuhiro Takano, Hitachinaka, JP;
Tetsuhiro Harada, Hitachinaka, JP;
Tomomasa Nishikawa, Hitachinaka, JP;
Kazutaka Iwata, Hitachinaka, JP;
Shiniki Otsu, Naka, JP;
Nobuhiro Takano, Hitachinaka, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
According to an aspect of the invention, an oil pulse tool includes: a motor generating a driving force according to a driving voltage; an oil pulse unit driven by the driving force and generating a torque in a pulse-like shape when the motor passes a strike position on a shaft thereof; and an output shaft on which a front end tool is mounted, the output shaft being connected to the shaft, characterized in that the oil pulse tool further comprises driving adjusting means to control the driving voltage, the driving voltage is reduced during a given period including a timing when the torque is transmitted to the output shaft, and the reduced driving voltage is increased when the given period is finished.