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:
Jan. 29, 2013
Filed:
Sep. 08, 2010
Yoshio Iimura, Ibaraki, JP;
Kenro Ishimaru, Ibaraki, JP;
Kazutaka Iwata, Ibaraki, JP;
Nobuhiro Takano, Ibaraki, JP;
Yoshio Iimura, Ibaraki, JP;
Kenro Ishimaru, Ibaraki, JP;
Kazutaka Iwata, Ibaraki, JP;
Nobuhiro Takano, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
According to an aspect of the present invention, there is provided a rotary striking tool, including: a motor; an impact unit having a driving part being driven by the motor and an output part; a tip-tool side output shaft that is coupled to the output part; an impact detection unit that detects an impact generated at the impact unit; and a control unit programmed to: control the impact unit to perform a confirmation striking when the impact detected by the impact detection unit reaches a prescribed value, detect a rotation angle of the output shaft at the confirmation striking, determine whether a fastening operation is completed when the detected rotation angle is equal to or smaller than a predetermined angle, and continue the fastening operation when the detected rotation angle is larger than the predetermined angle.