Patent ID: 8733729
Filing Date: 2014-05-27
Classification: F16K

Abstract:
1. A unidirectional flow valve assembly comprising: an inlet port; an outlet port; a valve seat disposed fluidicly between the inlet port and the outlet port; an isolation member configured to selectively allow fluid communication between the inlet port and the outlet port, the isolation member including a first bleed path from the inlet port to the second side of the diaphragm and a second bleed path from the outlet port to the second side of the diaphragm; a one way flow device in each of the first and second bleed paths, each one way flow device configured to allow fluid flow from the first side to the second side of the diaphragm and prevent fluid flow from the second side to the first side of the diaphragm; and a spring loaded and solenoid operated plunger configured to selectively seal and unseal the pilot port to thereby selectively allow fluid communication from the second side of the diaphragm to the outlet port through the pilot port; wherein the first bleed path and the second bleed path are configured so that fluid flow through the pilot port occurs only from the inlet port to the outlet port.