Thrust device

Claim 1

A SELF-CONTAINED THRUST PRODUCING DEVICE COMPRISING A SPHERICAL CONTAINER FOR CONTAINING A PROPELLANT FLUID UNDER PRESSURE, SAID CONTAINER BEING EFFECTIVE TO EXPAND AND CONTRACT IN RESPONSE TO CHANGES IN PRESSURE THEREIN, SAID CONTAINER HAVING AN OPENING THEREIN, A CYLINDRICAL HOUSING REMOVABLY FITTED IN SAID OPENING AND EXTENDING WITHIN SAID CONTAINER, AN OUTLET NOZZLE ON SAID HOUSIND AND OPENING TO THE EXTERIOR OF SAID CONTAINER, A FLUID VALVE DEVICE IN SAID HOUSING HAVING AN OULET COMMUNICATING WITH SAID NOZZLE AND AN INLET COMMUNICATION WITH THE INTERIOR OF SAID CONTAINER, SAID VALVE DEVICE HAVING A BORE EXTENDING COAXIALLY OF SAID HOUSING, AN ANNULAR VALVE SEAT IN SAID HOUSING EXTENDING COAXIALLY THEREOF AND COMMUNICATING WITH SAID OUTLET, A VALVE MEMBER SLIDABLE IN SAID BORE AND ENGAGEABLE WITH SAID VALVE SEAT; AND MEANS FOR MOVING SAID VALVE MEMBER TOWARD AND AWAY FROM SAID VALVE SEAT.