Drive assembly and apparatus for hoist
AssigneeGeneral Electric Company
InventorsRobert D. Cryer, Allen Randolph, Donald Brian Cooper, George J. Wnukoski, Mark L. Cooksey, Ernesto Camilo Rivera
Life of this patent
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Abstract
An assembly includes a motor; a second motor; a planetary transmission coupled to the motor and the second motor, and a spool coupled to the transmission. The spool has an interior volume for receiving the motor, the second motor and the transmission, and the motor and the second motor are disposed or disposable entirely within the spool. The motor and the second motor are capable of being operated such that one of the motors is speed controlled, and the other motor is torque controlled.
Claims18
An assembly for use as a draw works, comprising:
- a motor;
- a second motor;
- a planetary transmission coupled to the motor and the second motor;
- and
- a spool coupled to the transmission and having an interior volume for receiving the motor, the second motor and the transmission, and the motor and the second motor are disposed or disposable entirely within the spool;
- wherein the motor and the second motor are capable of being operated such that one of the motors is speed controlled, and the other motor is torque controlled;
- and
- wherein the motor has a power to weight ratio of greater than 0.182 horsepower per pound (HP/lb).
An assembly for use as a draw works, comprising:
- a spool having an inner surface defining a volume;
- a first motor and a second motor disposed in the spool volume;
- and a transmission disposed in the spool volume, and the first motor and the second motor are operable to provide mechanical power to the transmission such that the transmission can cause the spool to rotate about an axis;
- wherein the first motor and the second motor are capable of being operated such that one of the motors is speed controlled, and the other motor is torque controlled;
- and
- wherein a torque density (torque per volume) of the assembly exceeds 2000 kips where the volume is less than about 30 cubic meters.
Dependencies are inferred from the claim text.