Valves and valve actuation – Mechanical movement actuator – Gear
Reexamination Certificate
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:
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Kaminsky Robert
MacLay Todd R.
Stone Kenneth A.
Alston & Bird LLP
Newport News Shipbuilding and Dry Dock Company
Rivell John
Rost Andrew J
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