Patent ID: 6598385
Filing Date: 2003-07-29
Classification: B64G,F02K,F16K

Abstract:
A reaction jet for a maneuvering aerospace vehicle comprising:a pyrotechnic gas generator for providing a source of pressurized gas; a nozzle for directing said pressurized gas, said nozzle comprising a primary valve regulating a flow of gas through said nozzle, said primary valve operatively coupled to a control chamber; a pilot valve for selectively supplying said pressurized gas to and venting pressurized gas from said control chamber, the pilot valve comprising: a first stage valve comprising a first pressure inlet, a first service port and a first exhaust outlet, said first stage valve further comprising a first stage valve member moveable between a first position and a second position, the first position allowing fluid communication between said first pressure inlet and said first service port, the second position allowing fluid communication between said first service port and said first exhaust outlet; and a second stage valve comprising a second stage valve chamber, a second pressure inlet, a second service port and a second exhaust outlet, said second stage valve further comprising a second stage valve member disposed within said second stage valve chamber and moveable between an inlet position and an exhaust position, the inlet position allowing fluid communication between said second pressure inlet and said second service port, the exhaust position allowing fluid communication between said second service port and said second exhaust outlet, said second stage valve member being responsive to pressure in the first service port to move said second stage valve member.