Lever drive for a cryogenic valve

Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve

Reexamination Certificate

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Details

C251S243000

Reexamination Certificate

active

10960958

ABSTRACT:
A valve assembly for controlling flow of cryogenic fluids is disclosed. In an embodiment, the valve assembly includes a valve housing and a valve member supported at the valve housing for movement between a valve opened and a valve closing position. A pneumatic cylinder is disposed laterally spaced from the valve member and thermally isolated with respect to cryogenic fluids controlled by the valve member. A lever operatively connects the pneumatic cylinder with the valve member and a linkage is pivotally connected with the lever at a position spaced from the valve member. The valve member is a needle valve member supported for axial movement at the housing.

REFERENCES:
patent: 677940 (1901-07-01), Carr
patent: 2490555 (1949-12-01), Songer
patent: 2708093 (1955-05-01), Leber
patent: 3260496 (1966-07-01), Borcherdt
patent: 3684237 (1972-08-01), Hyde et al.
patent: 3765438 (1973-10-01), Di Sciascio
patent: 3970280 (1976-07-01), Kunz
patent: 5074325 (1991-12-01), Rumberger et al.
patent: 5078180 (1992-01-01), Collins
patent: 5333989 (1994-08-01), Missana et al.
patent: 5586745 (1996-12-01), Knapp
patent: 5967486 (1999-10-01), McCrory et al.
patent: 852211 (1940-01-01), None
patent: 853148 (1960-11-01), None

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