Patent ID: 8448662
Filing Date: 2013-05-28
Classification: G05D,Y10T

Abstract:
1. A three-stage pressure regulator comprising: a regulator body having portions defining a first valve chamber, a second valve chamber and a third valve chamber, wherein the first valve chamber is in fluid communication with the second valve chamber and wherein the second valve chamber is in fluid communication with the third valve chamber; a first-stage valve comprising a piston, wherein the piston comprises a piston head and a piston shaft wherein the piston has portions defining a piston channel open at a top end of the piston and wherein the piston has portions defining a piston hole formed on a sidewall of the piston shaft in fluid communication with the piston channel, a poppet housed in the first valve chamber, a piston cap secured to the regulator body first valve chamber with a piston nut secured to a wail of the first valve chamber, wherein the piston cap is superposed about the piston to create a piston gap; a second-stage valve comprising a diaphragm and a ball valve housed in the second valve chamber; and, a third-stage valve comprising a second diaphragm and a second ball valve housed in the third valve chamber.