Patent ID: 6257277
Filing Date: 2001-07-10
Classification: F15B,F16K,Y10T

Abstract:
A control valve assembly for supplying a choice of preselected pressure levels from a pneumatic supply; said assembly characterized by:a manifold having a primary supply passage connectable to a supply of primary pressure;first and second regulators mounted onto said manifold each having an inlet for receiving pneumatic pressure from said primary supply passage and each having an outlet for providing respective different first and second lower secondary pressures from said primary supply passage;an electrically actuated selector valve mounted onto said manifold, said selector valve includes a housing with two inlet ports, two outlet ports and an exhaust port connected to a valve chamber and at least one valve element operably mounted in said chamber, said selector valve element being moveable to a selected one of two positions based on the actuation or de-actuation of the selector valve such that a respective inlet port is connected to its respective outlet port and the other inlet port is closed from its respective outlet port which in turn is in communication with said exhaust port;said inlet ports being in fluid connection with said respective outlet ports of said regulators for supplying said respective secondary pressures to said selector valve;the respective outlet port of the selector valve being connected to respective inlets of a shuttle valve, said shuttle valve having a single outlet selectively in communication with its inlet containing a higher pneumatic pressure therein;the exhaust port of the selector valve being in communication with an exhaust passage in the manifold; andthe single outlet of the shuttle valve being in communication with an outlet passage in said manifold for receiving a selected one of the secondary pressures from the respective regulators via the selector valve.