Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Patent
1994-08-10
1997-01-21
Hail, III, Joseph J.
Tool driving or impacting
Automatic control of power operated means
Drive means responsive to torque or speed condition
173216, 192 552, 192 5656, 192 5661, 74411, B25B 2100, B23B 4500
Patent
active
055952518
ABSTRACT:
Methods and apparatus are provided for a torque driver including a displaceable gear to limit torque transfer to a fastener at a precisely controlled torque limit. A biasing assembly biases a first gear into engagement with a second gear for torque transfer between the first and second gear. The biasing assembly includes a pressurized cylinder controlled at a constant pressure that corresponds to a torque limit. A calibrated gage and valve is used to set the desired torque limit. One or more coiled output linkages connect the first gear with the fastener adaptor which may be a socket for a nut. A gear tooth profile provides a separation force that overcomes the bias to limit torque at the desired torque limit. Multiple fasteners may be rotated simultaneously to a desired torque limit if additional output spur gears are provided. The torque limit is adjustable and may be different for fasteners within the same fastener configuration.
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Cate James M.
Hail III Joseph J.
Stelacone Jay A.
The United States of America as represented by the Administrator
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