Patent ID: 7287727

Claim:
An inflatable aircraft evacuation slide system comprising: an inflatable evacuation slide stored in an undeployed condition; a source of inflation gas; and a control valve, said control valve comprising a valve body having an inlet port, a first chamber, a primary valve member, a second chamber, a secondary valve member, a primary outlet port fluidically interconnected to said inflatable evacuation slide, and a secondary outlet comprising an exhaust vent; said inlet port being disposed in a fluid path between said source of inflation gas and said first chamber, said inlet port being adapted to receive a flow of pressurized fluid from said source of inflation gas and to deliver said flow of pressurized fluid to said first chamber; said primary valve member being disposed in a fluid path between said first chamber and said second chamber, said primary valve member opening in response to an external signal to permit pressurized fluid to flow from said first chamber to said second chamber; said secondary valve member being disposed in a fluid flow path between said second chamber and said primary outlet port; said secondary valve member opening in response to a predetermined pressure in said second chamber to allow a flow of pressurized fluid from said second chamber into said primary outlet port for inflating said inflatable evacuation slide; said control valve further comprising a valve leakage trap, said valve leakage trap comprising a fixed, normally open fluid flow path from said second chamber to said secondary outlet.