Reverse flow fueldraulic valve

Details Reverse flow fueldraulic valve Reverse flow fueldraulic valve

2011-03-29

2011-03-29

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

With material guide or restrictor

Movable or resilient guide or restrictor

C251S030020, C251S063600

Reexamination Certificate

active

07913973

ABSTRACT:
A reverse flow valve for metering high pressure gaseous media, such as ignition media to the injectors of a scramjet engine in a hyerpsonic flight vehicle, has a metering member that moves parallel to the flow direction of the metered media and throttles the valve in a direction counter to the flow direction. This reduces side loading on the metering member and permits the use of a lighter and smaller actuating mechanism. The metering member can be a pintle having a uniquely configured pintle seat providing bubble tight shut off of the inlet flow without effecting the critical flow contour of the media. The pintle can be driven by a piston that is responsive to push-pull forces of pressurized drive fluid under servo control. The drive fluid is isolated from the gaseous media by a primary seal, which can be seated on the piston without deformation by a seal retainer. The drive fluid can be fuel diverted from the sustained combustion fuel system of the vehicle so that a separate hydraulic system is not required.

REFERENCES:
patent: 1970726 (1934-08-01), Barrett
patent: 2061852 (1936-11-01), Schweitzer
patent: 2439523 (1948-04-01), Miller et al.
patent: 3180360 (1965-04-01), Pavlin
patent: 3788400 (1974-01-01), Tufts
patent: 5813801 (1998-09-01), Newbolt et al.
patent: 6250602 (2001-06-01), Jansen
patent: 6749173 (2004-06-01), Heiling
patent: 6783108 (2004-08-01), Jansen

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