Patent ID: 8869509

Claim:
An accessory flow recovery system comprising: a system inlet configured to receive a first fluid flow; a first pump with a pump inlet and a pump outlet, the first pump inlet configured to receive at least a portion of the first fluid flow from the system inlet and to discharge a second fluid flow from the pump outlet; an actuation unit to operate accessory components and for supplying a third fluid flow; a fluid metering system configured to regulate the flow rate of the second fluid flow based on a flow demand; an inlet pressurizing valve in fluid communication with the first pump outlet and with the fluid metering system, the inlet pressurizing valve positioned between the pump outlet and the fluid metering system, and configured to regulate the second fluid flow between the first pump and the fluid metering system based on a pressure of the third fluid flow; and a return switch valve configured to direct the third fluid flow to the fluid metering system when the accessory flow recovery system is operating in a first mode, and to direct the third fluid flow to the system inlet when the accessory flow recovery system is operating in a second mode.