Carrier Corporation

Dana W Nelson

Charles H Kouse

A torque control for a fluid operated motor includes a first gear to be driven through operation of the motor and a second gear in driving engagement with said motor and maintained in a generally stationary position during normal operation thereof. The torque control further includes a drive mechanism connected to the first gear and to a load to be rotationally driven through operation of the motor. A valve is provided in the fluid supply to the motor to open and close the supply of fluid thereto. Disconnect means is operatively connected to the second gear and the valve to maintain said valve in an open position to permit supply of fluid to said motor when the second gear is stationary. The second gear rotates when the torque required from the motor to rotate the load exceeds a predetermined magnitude to move the disconnect means relative to the valve to close the valve to terminate the supply of fluid to the motor.

Torque control for a fluid operated motor

A tube cleaning apparatus comprising a frame for attachment to a rotatable drive shaft, and a plurality of arms connected to the frame for movement between an extended position and a retracted position. The apparatus also comprises a plurality of cutter heads secured to the arms for engaging the inside surface of the tube, wherein the cutter heads are spaced from the inside surface of the tube when the arms are in the retracted position, and biasing means for urging the arms to the retracted position. Also disclosed is a method of operating the tube cleaning apparatus.

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Dexter, OH, United States of America

Dana W Nelson