Valve actuator mechanism for lift-turn type valves

Valves and valve actuation – Mechanical movement actuator – Plural dissimilar mechanical movements

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74 22R, 74 23, 74 25, 74 57, 74422, 251 14, 251 56, 251 58, 251250, 251252, F16K 3150, F16K 3152, F16K 3154

Patent

active

044362803

ABSTRACT:
A valve actuator mechanism for a lift-turn type valve having a valve element that is operated by first linear unseating movement, rotational repositioning movement and linear reseating movement. First and second actuator stems are supported by an actuator housing for both linear and rotational movement. A movement translation mechanism is interconnected between the first and second actuator stems and functions to translate an initial component of linear movement of the second actuator stem in one direction into an initial component of movement of the first actuator stem in said one direction to unseat said valve element, translating an intermediate component of linear and rotary movement of said second actuator stem in said one direction into an intermediate rotary movement of said first actuator stem to rotate and reposition said valve element and translating a terminal component of linear movement of said second actuator stem in said one direction into a terminal linear component of movement of said first actuator stem in an opposite direction to reseat said valve element.

REFERENCES:
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patent: 2953344 (1960-09-01), Yancey
patent: 3046802 (1962-07-01), Cupedo
patent: 3793893 (1974-02-01), Heinen
patent: 3806082 (1974-04-01), Kellner
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patent: 4120479 (1978-10-01), Thompson et al.
patent: 4234157 (1980-11-01), Hodgeman et al.
patent: 4293117 (1981-10-01), Mueller
patent: 4350322 (1982-09-01), Mueller

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