Patent ID: 9310812
Filing Date: 2016-04-12
CPC Classification: G05D,Y10T

Claim Text:
1. A multi-stage fluid pressure regulator comprising: a first stage valve comprising a moveable first stage piston comprising a central axis and arranged to open and close a fluid flow path to control flow of fluid through the valve, and a gas delivery conduit formed as a single, unitary part with said first stage piston, wherein said gas delivery conduit extends along said central axis such that a distal end of said gas delivery conduit is in direct fluid communication with a second valve chamber of a second stage valve; a second stage valve in fluid communication with the gas delivery conduit, the second stage valve including said second valve chamber into which the distal end of the gas delivery conduit is positioned; a body, wherein said first stage valve is disposed within said body, and wherein said body is formed to include a vent extending therethrough; a first piston spring disposed within said body and urging said moveable first stage piston downwardly; a piston seal arranged to engage with a stepped surface of said moveable first stage piston and with a tapered surface of said piston bore to control the flow of gas from inside said moveable first stage piston; when said moveable first stage piston is moved downwardly by said piston spring, fluid flow from inside said moveable first stage piston is stopped by said piston seal, although fluid flow from said first valve chamber is permitted; when said moveable first stage piston is moved upwardly, fluid flow from inside said moveable first stage piston is permitted, but fluid flow from said first valve chamber is stopped.