Invention Grant
- Patent Title: Rotary impact tool and method for controlling the same
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Application No.: US15236718Application Date: 2016-08-15
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Publication No.: US10427282B2Publication Date: 2019-10-01
- Inventor: Goshi Ishikawa , Yoshihiro Ito , Toshihisa Takada
- Applicant: MAKITA CORPORATION
- Applicant Address: JP Anjo-Shi
- Assignee: MAKITA CORPORATION
- Current Assignee: MAKITA CORPORATION
- Current Assignee Address: JP Anjo-Shi
- Agency: Oliff PLC
- Priority: JP2015-164929 20150824
- Main IPC: B25B23/147
- IPC: B25B23/147 ; B25B21/02

Abstract:
In a rotary impact tool according to an aspect of the present disclosure, an impact mechanism rotates an output shaft by a rotational force of a motor and, when a torque equal to or greater than a given value is externally applied to the output shaft in a direction opposite a rotational direction of the output shaft, the impact mechanism intermittently applies an impact force as a momentary torque to the output shaft in the rotational direction of the output shaft. A protection unit stops the motor or reduces a rotational speed of the motor on condition that an abnormal impact detection unit detects the abnormal impact. A control unit controls activation of the protection unit differently when the rotational direction of the motor is set to a reverse rotational direction in comparison with when the rotational direction of the motor is set to a forward rotational direction.
Public/Granted literature
- US20170057064A1 ROTARY IMPACT TOOL AND METHOD FOR CONTROLLING THE SAME Public/Granted day:2017-03-02
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