Torque control and fluid shutoff mechanism for a fluid operated

Details Torque control and fluid shutoff mechanism for a fluid operated Torque control and fluid shutoff mechanism for a fluid operated

1983-02-28

1986-03-18

Bonck, Rodney H.

192 clutches and power-stop control

Stop mechanism

Overload release

173 12, B25B 23145

Patent

active

045762708

ABSTRACT:
An improved torque control and fluid shutoff mechanism for a fluid operated tool includes an output shaft with an axially slidable cam sleeve mounted on the shaft. The cam sleeve is coupled with a driven tool bit holder to provide a clutch connection. The cam sleeve is biased for engagement with a cam surface on the tool bit holder whereby during normal operation of the tool, the tool bit holder remains fixed relative to the cam sleeve. When a threshold torque acts on the tool bit holder, the tool bit holder rotates relative to the cam sleeve axially driving the cam sleeve to release a biased kickout sleeve from retaining a radially displaceable member. The radially displaceable member engages a throttle rod and a thrust pin. The throttle rod extends to a fluid control valve which controls inlet fluid. Release of the radially displaceable member from being retained by the kickout sleeve permits axial translation of the throttle rod to terminate fluid flow to the motor of the tool. The throttle rod is also responsive through the thrust pin to the position of a tool bit mounted in the tool bit holder to open the fluid flow to the motor.

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