Valve actuator

Details Valve actuator Valve actuator

1976-01-26

1978-04-04

Cline, William R.

Valves and valve actuation

Mechanical movement actuator

Plural dissimilar mechanical movements

74330, 744248VA, 251248, F16k 3153

Patent

active

040822478

ABSTRACT:
A valve actuator is provided for use in conjunction with a valve having a rotatable member wherein rotation of the rotatable member selectively actuates the valve in accordance with the direction of rotation of the rotatable member. The valve may be of the rising-stem valve type in which the rotatable member threadably engages the valve stem to axially shift the valve stem to thereby actuate the valve. The valve actuator comprises a nut adapter secured to the rotatable member in combination with actuating means contained within a housing. The actuator means further comprises a drive tube which lockingly engages the nut adapter by means of inwardly projecting indentations formed axially along the drive tube and which are received in axial grooves formed along the periphery of the nut adapter. In addition, the drive tube is coaxial with the valve stem so as to permit the valve stem to be received axially through the drive tube upon valve actuation. The drive tube is rotatably mounted and a gear arrangement is contained with the housing to rotatably drive the drive tube.

REFERENCES:
patent: 1705032 (1929-03-01), Short
patent: 2317529 (1943-04-01), Hodgson et al.
patent: 3034371 (1962-05-01), Cantalupo et al.
patent: 3174355 (1965-03-01), DeCraene

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