Fluid impulse torque tool

Details Fluid impulse torque tool Fluid impulse torque tool

1981-07-14

1983-12-06

Schmidt, Frederick R.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

192150, 81470, B23Q 506

Patent

active

044187645

ABSTRACT:
A fluid impulse torque tool used for tightening screws, which automatically stops when a predetermined tightening force is attained. A piston is actuated by relief oil from a relief valve attached to an oil pressure pulse generator. A shut-off valve placed in an air feed passageway to an air motor is connected to the piston. In a screw tightening operation, when a predetermined tightening force is attained, relief oil is produced to move the piston and this movement is transmitted to the valve to close the latter, thus shutting the air feed passageway to the air motor, so that the latter is stopped.

REFERENCES:
patent: 3116617 (1964-01-01), Skoog
patent: 3174606 (1965-03-01), Hornschuch et al.
patent: 3368631 (1968-02-01), MacNaughton
patent: 4113080 (1978-09-01), Thackston et al.

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