Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1977-12-12
1980-09-02
Rosenthal, Arnold
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
137334, 62 52, 62514R, 251 38, 251 43, F16K 3106, F16K 31122, F16K 4900
Patent
active
042203120
ABSTRACT:
An internally piloted shut-off valve for use with cryogenic fluids incorporates a short valve housing with normally closed valve closure means incorporated therein and fluid passages with ports for fluid flow therethrough including an elongated extended stem protruding therefrom on top of which a solenoid operator is received in the stem end opening so as to define a cavity therein housing a large piston interconnected with the valve closure means by an internally piloted concentric tubing disposed coaxially with the stem and, in combination with large piston, comprising valve actuating means which permit the use of conventional solenoid operator and a trickle of cryogenic fluid converted to vapor inside pilot passage of the tubing and supplied to the cavity at atmospheric temperature when solenoid is enerized, creating pressure differential therein capable of maintaining valve open until the solenoid operator is de-energized, allowing valve closing automatically.
REFERENCES:
patent: 2654393 (1953-10-01), Ghormley
patent: 3404865 (1968-10-01), Nelson
patent: 3460798 (1969-08-01), Carsten
patent: 3698682 (1972-10-01), Berning et al.
patent: 3801063 (1974-04-01), Holmes
patent: 3833015 (1974-09-01), Knever
Pauliukonis Richard S.
Rosenthal Arnold
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