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US 4,008,733 AGranted
Filling valves for pressure fueling devices
AssigneeZenith Aviation
InventorsJacques Courant, Robert Gonnet, Marc Thore
Life of this patent
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Abstract
A filling valve for a pressure fueling device, particularly for aircraft refueling, comprises a movable sleeve responsive to the flow rate of fuel through the valve and which increases the ratio between the fuel pressures acting on first and second surfaces of the valve closure unit, respectively, and exerting valve closure and opening forces, respectively, in proportion as the rate of flow increases.
Claims4
A filling valve for a pressure refueling device comprising:
- a hollow body;
- an annular passage in said body between upstream connection means and downstream connection means;
- a movable closure unit co-operating with a seat in said passage;
- means in said body for axially guiding said closure unit and co-operating with said closure unit for limiting an outer chamber forming part of the annular passage and an inner chamber communicating with the upstream connection means;
- control means for opening and closing communication of said inner chamber and a discharge duct;
- the pressure of the fuel acting on that surface of the closure unit which limits the outer chamber tending to move the closure member away from its seat, and the pressure of the fuel acting on that surface of the closure unit which limits the inner chamber tending to move the closure unit into its seat, and the resulting force exerted on the closure unit in the opening direction being greater than the force exerted in the closing direction when communication with the discharge duct is fully opened by the control means and conversely when communication with the discharge duct is fully closed by the control means;
- and means responsive to the flow rate of fuel across the valve for increasing the ratio between the fuel pressure in the inner chamber and the fuel pressure in the outer chamber as the flow rate increases, said means responsive to the flow rate of fuel including a movable sleeve guided in said body parallel to the flow direction of fuel in the body, said sleeve being provided with a driving surface disposed transversely with respect to the fuel flow direction and being constructed so as to increase the cross-section through which the upstream connection means communicates with the inner chamber, in proportion as the flow rate increases, and resilient means acting on said sleeve in the direction opposite to the flow direction.
4 more elements
A filling valve for a pressure refueling device comprising:
- a hollow body;
- an annular passage in said body between upstream connection means and downstream connection means;
- a movable closure unit co-operating with a seat in said passage;
- means in said body for axially guiding said closure unit and co-operating with said closure unit for limiting an outer chamber forming part of the annular passage and an inner chamber communicating with the upstream connection means;
- control means for opening and closing communication of said inner chamber and a discharge duct;
- the pressure of the fuel acting on that surface of the closure unit which limits the outer chamber tending to move the closure member away from its seat, and the pressure of the fuel acting on that surface of the closure unit which limits the inner chamber tending to move the closure unit into its seat, and the resulting force exerted on the closure unit in the opening direction being greater than the force exerted in the closing direction when communication with the discharge duct is fully opened by the control means and conversely when communication with the discharge duct is fully closed by the control means;
- and means responsive to the flow rate of fuel across the valve for increasing the ratio between the fuel pressure in the inner chamber and the fuel pressure in the outer chamber as the flow rate increases, wherein said inner chamber communicates with said upstream connection means through port means having a cross-sectional flow area which is controlled by said flow rate responsive means and with said downstream connection means through said control means and said discharge duct.
4 more elements
Dependencies are inferred from the claim text.