Tools – Wrench – screwdriver – or driver therefor – Responsive to torque on work
Patent
1999-07-08
2000-09-19
Eley, Timothy V.
Tools
Wrench, screwdriver, or driver therefor
Responsive to torque on work
81483, B25B 23144
Patent
active
061195626
ABSTRACT:
An electromechanical releasing torque wrench which includes an electronic controller (50) and transducers (32) or (34) to measure and actuate a release of the wrench with physical, audible and visual signals. In operation, the user sets the desired torque-release-point on the keypad (60) of the electronic controller and then attaches the wrench to a workpiece with the ratchet means which pivotally protrudes from the enclosure (20). The user tightens the workpiece, normally a threaded fastener, and the force sensing means attached to the ratchet (28) or (62) produce an analog signal to the controller. When the release point is reached the controller sends a signal to a solenoid (44) or linear actuator (66) creating linear mechanical motion causing the mechanical advantage locking latch and trigger means to disconnect the ratchet producing a momentary reduction of force felt by the operator and an audible clicking sound as the ratchet strikes the enclosure.
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patent: 4641538 (1987-02-01), Heyraud
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patent: 5497682 (1996-03-01), Hsu
patent: 5503042 (1996-04-01), Larson et al.
patent: 5537877 (1996-07-01), Hsu
patent: 5662012 (1997-09-01), Grobovac
patent: 5911801 (1999-06-01), Fravalo et al.
Cota Albert O.
Eley Timothy V.
Nguyen Dung Van
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