Automatic variable demand flow regulator

A variable demand flow regulator valve for regulating fluid flow based on variable pressure supply and variable pressure demand, the valve comprising:

• a cylindrical housing having an inlet side and an outlet side;
• a hollow pipe coaxial with the cylindrical housing, the hollow pipe having a closed inlet end and an open outlet end, the hollow pipe further having a plurality of openings along an exterior wall adjacent to the inlet end;
• a slidable cylindrical piston valve which slides about the exterior circumference of the hollow pipe adjacent to the inlet end, the piston valve having a first position for substantially covering the exterior wall openings of the hollow pipe, the piston valve having at least one through-hole running from a first end to a second end;
• a compression spring coaxially mounted about the hollow pipe adjacent to the open outlet end, the compression spring having a first end and a second end, the first end abutting against the first end of the piston valve and the second end abutting against an edge adjacent to the outlet side of the cylindrical housing, wherein fluid passing into the inlet side of the cylindrical housing passes through the at least one through hole of the piston valve until supply side pressure of the incoming fluid and demand side pressure of the outgoing fluid causes the piston valve to compress against the compression spring to allow incoming fluid to pass into the plurality of exterior wall openings of the hollow pipe and to the open outlet end of the hollow pipe.

A variable demand flow regulator valve for regulating fluid based on variable pressure supply and variable pressure demand, comprising:

• a hollow housing having an inlet and an outlet;
• a hollow valve element within the housing, the valve element having a closed inlet and an open outlet and having a plurality of openings through an exterior wall for allowing fluid flow into an interior of the hollow valve element;
• a piston within the housing and circumscribing the hollow valve element, the piston being slidable about the exterior wall of the hollow valve element, from a first position substantially covering the plurality of openings of the valve element to a second position exposing one or more of the plurality of openings,
• whereby fluid passing into the inlet of the housing pushes the piston toward the outlet of the housing, thereby exposing one or more of the plurality of openings in the hollow valve element, and the fluid flows through the plurality of openings into the interior of the hollow valve element and thence through the open outlet, until supply-side pressure of the incoming fluid and demand-side pressure of the outgoing fluid causes the piston to reach an equilibrium position within the housing.