US 2011/0214746 A1 · VALVE WITH VENTING PORT

Abstract

A valve includes a valve housing. A bore is in the valve housing. An inlet supply port fluidly communicates a pressurized supply fluid to the bore. A piston is movably positioned in the bore based on the pressure of the supply fluid. A portion of the piston extends into a frusto-conically shaped portion of the bore. A sealing member is associated with the portion of the piston sealingly engaging a surface of the frusto-conically shaped portion of the bore based on the pressure of the supply fluid. An inlet valve, movably positioned in the bore, is biased to sealingly engage a wall of the bore based on the pressure of the supply fluid. A control pressure supply port fluidly communicates a pressurized control fluid to the bore through the valve housing. A control pressure delivery port fluidly communicates with the control pressure supply port, via the bore, based on the pressure of the supply fluid. A venting port fluidly communicates with the control pressure delivery port, via the bore, based on the pressure of the supply fluid.

Claims20

Dependent claims

A valve, comprising:

a valve housing;
a bore in the valve housing;
an inlet supply port fluidly communicating a pressurized supply fluid to the bore;
a piston movably positioned in the bore based on the pressure of the supply fluid, a portion of the piston extending into a frusto-conically shaped portion of the bore, a sealing member associated with the portion of the piston sealingly engaging a surface of the frusto-conically shaped portion of the bore based on the pressure of the supply fluid;
an inlet valve, movably positioned in the bore, biased to sealingly engage a wall of the bore based on the pressure of the supply fluid;
a control pressure supply port fluidly communicating a pressurized control fluid to the bore through the valve housing;
a control pressure delivery port fluidly communicating with the control pressure supply port, via the bore, based on the pressure of the supply fluid;
and
a venting port fluidly communicating with the control pressure delivery port, via the bore, based on the pressure of the supply fluid.

6 more elements

A valve, comprising:

a valve housing;
a bore in the valve housing;
an inlet supply port fluidly communicating a pressurized supply fluid to the bore;
a piston, movably positioned in the bore based on the pressure of the supply fluid, a portion of the piston extending into a frusto-conically shaped portion of the bore, a sealing member on the portion of the piston sealingly engaging a surface of the frusto-conically shaped portion of the bore based on the position of the piston;
an inlet valve movably positioned in the bore and biased to sealingly engage a wall of the bore, the inlet valve becoming unsealed from the wall based on the position of the piston;
a control pressure supply port fluidly communicating a pressurized control fluid to the bore through the valve housing;
a control pressure delivery port fluidly communicating with the control pressure supply port, via the bore, based on the position of the inlet valve;
and
a venting port fluidly communicating with the control pressure delivery port, via the bore, based on the position of the inlet valve.

6 more elements

A method for controlling venting of a control pressure delivery port of a valve, the method comprising:

communicating a pressurized supply fluid to a bore of the valve;
movably positioning a piston in the bore based on the pressure of the supply fluid;
sealingly engaging/unengaging a sealing member, associated with a portion of the piston, with a surface of a frusto-conically shaped portion of the bore based on the pressure of the supply fluid;
movably positioning an inlet valve in the bore, the inlet valve being biased to sealingly engage a wall of the bore based on the pressure of the supply fluid;
communicating a pressurized control fluid to a supply port;
communicating the pressurized control fluid to a control pressure delivery port based on the pressure of the supply fluid;
and
fluidly communicating the control pressure delivery port with a venting port based on the pressure of the supply fluid.

5 more elements

Dependencies are inferred from the claim text.

Valve with venting port

Life of this patent

Valve with venting port

Life of this patent

Abstract

Claims20