Valves and valve actuation – With means for blocking or disabling actuator – Fluid pressure biased latch
Patent
1999-09-13
2000-10-17
Shaver, Kevin
Valves and valve actuation
With means for blocking or disabling actuator
Fluid pressure biased latch
251 12, F16K 3500, F16K 3112
Patent
active
061318787
ABSTRACT:
A control valve for controlling flow of fuel from a fuel tank to a rocket engine having a valve body longitudinally displaceable between open and closed positions of the control valve, a piston rod secured in the valve body, and a piston secured to the piston rod. The piston is subjected to a pressure gas in a first control chamber to displace the piston to the open position of the valve, against the action of a spring which urges the valve to the closed position. A locking rod is operated by the pressure gas and carries a locking member for engaging in a groove in the piston rod in the open position of the valve. A switching disk is secured on the locking rod and is subjected to the pressure gas in a first gas chamber to displace the locking member from the groove. The switching disk is provided with a control hole for throttled passage of the control gas to the first control chamber to displace the piston with a slight delay to the open position of the valve against the action of the spring. When the first gas chamber is de-pressurized control gas in the control chamber flows out through the control hole in the switching disk. Pressure gas is supplied to a second gas chamber which acts on the locking rod to keep the locking member out of contact with the piston rod.
REFERENCES:
patent: 3688794 (1972-09-01), Bird et al.
patent: 4052995 (1977-10-01), Ellison
patent: 4700925 (1987-10-01), Russak
patent: 4903937 (1990-02-01), Jakubiec et al.
patent: 5325895 (1994-07-01), Pan
patent: 5540558 (1996-07-01), Harden et al.
Bonderer David A.
Daimler-Chrysler AG
Shaver Kevin
LandOfFree
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