Invention Grant
- Patent Title: Electrical torque screwdriver
- Patent Title (中): 电动扭矩螺丝刀
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Application No.: US13450492Application Date: 2012-04-19
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Publication No.: US08833212B2Publication Date: 2014-09-16
- Inventor: Chih-Ching Hsieh
- Applicant: Chih-Ching Hsieh
- Applicant Address: TW Taichung
- Assignee: Kabo Tool Company
- Current Assignee: Kabo Tool Company
- Current Assignee Address: TW Taichung
- Agency: CKC & Partners Co., Ltd.
- Priority: TW100119593A 20110603
- Main IPC: B25B23/159
- IPC: B25B23/159 ; B25B23/142 ; B25B21/00

Abstract:
An electrical torque screwdriver includes a handle, a shaft, a torque limiter, and an electrical switch. The shaft is disposed on the handle and rotatable but not movable linearly. The torque limiter includes a driving tooth, a slipping block, a pawl, and at least one restoring element. The driving tooth is disposed on the shaft. The slipping block is disposed on the handle. The slipping block is displaceable linearly but not rotatable. The pawl is disposed on the slipping block and engaged with the driving tooth. The restoring element is pivotally disposed on the handle and has a restoring force, wherein one end of the restoring element resists against the slipping block for pushing the pawl to be engaged with the driving tooth. The electrical switch is disposed on the handle for optionally resisting against the other end of the restoring element to stop the restoring element.
Public/Granted literature
- US20120304838A1 ELECTRICAL TORQUE SCREWDRIVER Public/Granted day:2012-12-06
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