Patent ID: 7766030
Filing Date: 2010-08-03
Classification: F15B,Y10T

Abstract:
1. A high pressure transducer comprising: a supply inlet configured to provide a gas supply to the high pressure transducer at a variable supply pressure, wherein the variable supply pressure is greater than or equal to 750PSI; a pressure divider section comprising a ratio piston assembly having a lower small area piston and an upper large area piston, coupled to the supply inlet and configured to reduce the variable supply pressure, by a fixed ratio equal to a ratio of the diameter of the lower small area piston to the diameter of the upper large area piston, and wherein the reduced pressure is variable, proportional to the variable supply pressure, and less than or equal to 200PSI; a low pressure control section coupled to the pressure divider section, the low pressure control section comprising at least one pair of feed and bleed valves, the low pressure control section configured to receive the reduced pressure gas from the pressure divider section and to vary the pressure to produce a variable control pressure; an amplifying section coupled to the low pressure control section and coupled to a main supply valve, wherein the low pressure control section actuates the amplifying section in response to the variable control pressure, the amplifying section configured to control the main supply valve to produce an output pressure that is a multiple of the variable control pressure by modulating the variable input pressure applied to the main supply valve; and an electrical feedback control circuit having a first pressure sensor for monitoring pressure in the pressure divider section and a second pressure sensor for monitoring output pressure in the amplifying section, the feedback control circuit configured to control the low pressure control section as a function of the pressure in the pressure divider section, the pressure in the amplifying section, and a control signal.