Compressed-air screwdriver with shutoff bypass means

Details Compressed-air screwdriver with shutoff bypass means Compressed-air screwdriver with shutoff bypass means

1979-09-11

1984-11-06

Mackey, Robert R.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81470, B25B 23145

Patent

active

044806990

ABSTRACT:
The invention relates to a compressed-air screwdriver including a tool spindle, displacable against the action of a spring; an automatic shutoff having a valve for the motor, which upon attaining a predetermined torque is turned off and a device whose actuation, after the automatic shutoff, permits the motor to be put back into operation so that a screw can be further tightened or loosened with increased torque.

REFERENCES:
patent: 3195704 (1965-07-01), Linsker
patent: 3612236 (1971-10-01), Klinten
patent: 3811513 (1974-05-01), Wezeh
patent: 3993145 (1976-11-01), Findeli
patent: 4006785 (1977-02-01), Roll et al.
patent: 4088197 (1978-05-01), Roll et al.

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