Torque sensing, automatic shut-off and reset clutch for screwdri

Details Torque sensing, automatic shut-off and reset clutch for screwdri Torque sensing, automatic shut-off and reset clutch for screwdri

1987-11-05

1989-11-14

Yost, Frank T.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81470, 192150, B25B 23145

Patent

active

048800643

ABSTRACT:
An improved torque control and fluid shut-off mechanism for a fluid operated tool includes a bit holder and driving clutch member which are connected for uniform cojoint axial movement and independent rotary movement. Spring biased ball bearings provides for cojoint rotary movement which is overcome when the spring biasing force associated with the driving clutch member exceeds a threshold level. A locking sleeve fitted over the driving clutch member cooperates with a control rod for the fluid inlet to the rotary vane air motor to control initiation of operation, termination of operation, and resetting of the tool.

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