Automatic pressure control system
AssigneeMarotta Scientific Controls, Inc.
InventorDonald A. Worden
Life of this patent
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Abstract
This gas pressure control system is intended primarily for testing gauges by providing an accurate static gas pressure over a wide range, preferably from zero to 10,000 pounds per square inch. The system is equipped with a pressure intensifier that operates automatically to raise the delivery pressure above the supply pressure when necessary. The supply may be a bottle of nitrogen under pressure of two thousand two hundred pounds per square inch, and the pressure intensifier is preferably a cylinder-and-piston motor-pump combination with a displacement ratio such as 70 to 1.
Claims16
A pressure supply system for supplying adjustable and controlled outlet pressure selectively lower or higher than a gas supply pressure, including in combination a first pressure regulator connected on its upstream side to a supply source for gas under pressure, a port on the downstream side of the first pressure regulator from which gas under controlled and reduced pressure is supplied to the system, a first passage connected with said port of the first regulator for connection with an ultimate delivery outlet, a pressure intentsifier pump connected at an intermediate location along the course of said first passage, an activator for operating the pressure intensifier pump to increase the delivery pressure from said first passage to the ultimate delivery outlet when the pressure necessary at the ultimate delivery outlet is in excess of the delivery pressure of the first regulator, a controller that operates the actuator, a connection between the first regulator and the controller for making the controller responsive to the pressure at the first pressure regulator, a second pressure regulator with an upstream port for connection with a source of intermediate pressure fluid, and means connected with the downstream side of the second pressure regulator for restoring the pressure intensifier pump actuator to position for a successive operation when the actuator has been operated by said controller through a stroke that intensifies the pressure delivered to the ultimate delivery outlet.
Dependencies are inferred from the claim text.