Variable torque valve actuator

Details Variable torque valve actuator Variable torque valve actuator

2007-06-21

2010-11-23

Rivell, John (Department: 3753)

Valves and valve actuation

Mechanical movement actuator

Gear

C074S508000, C074S509000

Reexamination Certificate

active

07837175

ABSTRACT:
The invention provides an actuator for moving a threaded valve stem along a longitudinal axis to selectively open or close a valve. The actuator comprises a carrier rotatably mounted within a housing. A portion of the carrier has a bore threaded to receive the threaded valve stem. The actuator further comprises a gear arrangement configured for transmitting a rotational force to the carrier. A cylindrical operator rotatably mounted to the housing has a plurality of splines on its circumference and is configured for receiving a rotational input force from a drive mechanism. An annular collar slidably disposed around the operator rotates with the operator but can slide longitudinally along the operator between a first position in which it engages the gear arrangement and a second position in which it engages the carrier.

REFERENCES:
patent: 326196 (1885-09-01), Blessing
patent: 783007 (1905-02-01), Allen et al.
patent: 1784094 (1930-12-01), Fletcher
patent: 1793228 (1931-02-01), Hackethal
patent: 1996365 (1935-04-01), Clinedinst
patent: 2025244 (1935-12-01), Morehead et al.
patent: 2150813 (1939-03-01), Ball
patent: 2674903 (1954-04-01), Doster
patent: 3108487 (1963-10-01), Sandler
patent: 4082247 (1978-04-01), Dalton
patent: 4093180 (1978-06-01), Strabala
patent: 4994001 (1991-02-01), Wilkinson et al.

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