Valve actuator

Details Valve actuator Valve actuator

1976-01-26

1978-03-14

Scott, Samuel

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

744248VA, F16H 2702

Patent

active

040784401

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 valve stem" type in which the rotatable member threadably engages the valve stem to axially shift the valve stem upon actuation of the valve. The valve actuator comprises a nut adapter secured to the rotatable member in combination with actuating means contained in 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 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 includes a drive gear secured thereto so that rotation of the drive gear effects a similar rotation of the nut adapter through the drive tube. A bevel gear arrangement, operable in response to the rotation of a crankshaft, meshingly engages and cooperates with the drive gear to effect the rotation thereof wherein the axis rotation of the crankshaft is radially spaced from the axis of the valve.

REFERENCES:
patent: 2845814 (1958-08-01), Milleville
patent: 2964961 (1960-12-01), Gulick
patent: 3949626 (1976-04-01), Berlinger et al.

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