Patent ID: 8362408

Claim:
A steerable projectile that uses pressurized gas for guidance during flight, the steerable projectile comprising: a pressure chamber to hold the pressurized gas; and a body section coupled to the pressure chamber, the body section having a flight system to use the pressurized gas for adjusting a trajectory of the steerable projectile; wherein the pressure chamber comprises: an orifice in a wall of the pressure chamber; and a check valve communicating with the orifice, the check valve configured to allow the pressurized gas that results from ignition of a propellant to enter the pressure chamber via the orifice and to prevent the pressurized gas, once inside the pressure chamber, from exiting the pressure chamber via the orifice, whereby external pressure produced by ignition of the propellant moves the check valve to open the orifice permitting entry of the pressurized gas into the pressure chamber and the orifice is closed in response to pressure from a portion of the check valve, wherein a lower pressure limit in the pressure chamber is controlled by the check valve and an upper pressure limit is at least partially controlled by a diameter of the orifice.