Patent ID: 8336575

Claim:
A fluid pressure regulating apparatus, comprising: a chamber comprising a first bore diameter, and a second bore diameter, with the first bore diameter larger than the second bore diameter; a fluid inlet for receiving fluid at an unregulated pressure, and a fluid outlet for discharging fluid at a regulated pressure; a shuttle assembly located in the chamber, the shuttle assembly moveable during operation of the fluid pressure regulating apparatus, the shuttle assembly comprising: a Schrader valve that is in fluid communication with both the fluid inlet and the fluid outlet, the Schrader valve including a pin element that moves relative to the shuttle assembly and abuts an adjustable pressure release element to open the Schrader valve when the shuttle assembly moves during operation; a first sealing member located within the first bore diameter, the first sealing member preventing fluid communication between the fluid inlet and the fluid outlet except through the Schrader valve; and a second sealing member located within the second bore diameter, the second sealing member preventing fluid communication between the fluid inlet and a fluid pressure control zone, with the fluid inlet located between the first sealing member and the second sealing member, and the first sealing member having a diameter larger than the second sealing member; an unregulated pressure zone communicating with the fluid inlet; a regulated pressure zone communicating with the fluid outlet; and the fluid pressure control zone including a plurality of springs that communicate with a portion of the shuttle assembly, the fluid pressure control zone and the plurality of springs structured to variably control the regulated pressure at the fluid outlet.