Electrically powered screw tightening tool

Details Electrically powered screw tightening tool Electrically powered screw tightening tool

1987-11-23

1989-06-13

Yost, Frank T.

Tool driving or impacting

Drive control operable by hand engaging manipulating handle

173 12, B23B 4500

Patent

active

048383643

ABSTRACT:
An electrically powered screw tightening tool including a motor (11) which via a torque transmitting mechanism (12) is coupled to an output shaft (13) for applying torque to a screw joint. The torque transmitting mechanism (12) comprises a torque responsive clutch (16) and a trip device (19) by which an axially extending release rod (23) is supported during operation of the tool. A switch (14) is provided to supply electric power to the motor (11), and a control mechanism including an operator activated manoeuver device (37) and an activating device (28) associated with the release rod (23) is arranged to cause shifting of the switch (14) between an OFF-condition and an ON-condition. The activating device (28) is actuated both by the manoeuver device (37) and the release rod (23).

REFERENCES:
patent: 3419087 (1968-12-01), Amtsberg et al.
patent: 3970151 (1976-07-01), Workman, Jr.

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