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US 2006/0137745 A1Published application
Gas pressure regulator
AssigneeEvolve Paintball Ltd.
InventorMartin Carnall
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AssigneeEvolve Paintball Ltd.
InventorMartin Carnall
Estimating the term…
A gas pressure regulator of the kind in which a valve member is spring biased to the valve-open position and is moved to the valve-closed position when upstream pressure at an outlet overcomes the spring is arranged such that gas pressure at an inlet end of the valve member 12 does not influence it in the valve-opening direction. In the embodiment of FIGS. 3 and 4 a bottom end of the valve member receives a piston-like plug. Openings in the wall of the valve member are occluded when the valve is closed. In the open position of the valve-member pressure is equal all round each opening. In another embodiment of the invention a spool is provided having one enlarged end within the valve member and another outside it. Pressure on the combined surfaces of the end and the end of the valve member is equal to the pressure on the end of the spool.
A gas pressure regulator comprising a housing having inlet and outlet ports, a valve member moveable in a bore in the housing between positions opening and closing communication between the inlet and outlet and means biasing the valve member toward the valve open position, the valve member having a through passage for communicating the inlet with the outlet and a surface presented to the outlet such that downstream pressure on said surface will urge the valve member to the valve closed position against the action of the biasing means, characterised in that the inlet communicates with the through passage via gas admission means arranged such that upstream gas pressure acting on the valve member in the valve-opening direction is compensated by gas pressure acting on the valve member in the opposite direction.
Dependencies are inferred from the claim text.