Machine element or mechanism – Gearing – Reversal of direction of power flow changes power...
Patent
1981-06-10
1984-01-03
Braun, Leslie A.
Machine element or mechanism
Gearing
Reversal of direction of power flow changes power...
74342, 74404, 173163, F16H 552, F16H 322, F16H 5700
Patent
active
044236450
ABSTRACT:
A spinner for turning a well drilling kelly or the like and including a member connectible to the kelly to drive it rotatively, a reversible motor, and a drive between the rotor of the motor and said member including two gears for driving the member in opposite directions respectively, with the two gears being mounted by threaded connections for axial movement between active driving positions and retracted non-driving positions. Rotation of the motor acts by virtue of a threaded connection or connections to shift one of the gears to its active driving position to turn the driven member in a first direction, while retaining the second of the gears in its retracted position. Rotation of the motor in the opposite direction acts to shift the second of the gears to active position driving the member in its second direction while retracting the first of the gears to its inactive position.
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Abbott Roderick K.
Picard Joseph A. R.
Seneviratne Padmasiri D.
Braun Leslie A.
Green William P.
Varco International, Inc.
Wojciechowski Bruce F.
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