Abstract: Containers for storing fluids, especially carbon dioxide, under pressure comprise a tubular component (made of a deformable material capable of at least 7% elongation before fracture) which is preferably closed by a top plug with a filling/emptying device (and any end plug) by crimping open end(s) of the component over a circumferential shoulder on the plug(s). A primary pressure relief device comprising a poppet with a piston section, a return spring and a control (exit) orifice tolerates and ejects dirt, prevents the formation of solid phase material and vents the contents in brief spurts so as to minimize loss. Desirably, a narrow helical conduit connects the primary pressure relief device to the container interior and, by being in thermal contact with the tubular component, chills the contents during venting so as to minimize loss.

Abstract: A fluid valve (3) for incorporation in a container (1) for storing a fluid under pressure and arranged for charging the container therethrough with, and dispensing therethrough from the container, a pressurized fluid, has a chamber (4) having at one end an inlet (15) and at the other end an outlet (9) for the fluid; a valve piston (5) sealingly guided and movable within the chamber (4); and a valve member (10) which is also movable within the chamber (4); the piston (5) having a valve seat (7) and the valve piston having a valve seal (12) arranged for sealingly cooperating with the seat (7) which is disposed towards the inlet (15). A passageway (8) leads from the seat (7) to the outlet (9). The valve member (10) is biased by a spring (13) against the seat (7) to close the passageway (8), and has an extension (11) passing through the passageway (8) and the outlet (9).

Abstract: The gas powered vehicle has a reservoir for holding liquified gas, means to evaporate the liquified gas and a delivery conduit to deliver gas from the evaporating means to a motor to power the motor. A heat exchanger is provided for thermal communication between a condensing buffer substance and the expanded gas flowing into the receiving means. A refrigeration means pumps heat from and cools the condensing substance to a temperature low enough to condense the expanded gas received from the motor.

Abstract: A pressure-liquefiable gas or vapor fed into the interior of a container which may constitute the fuel tank of a power unit for a model aircraft or other working model, is condensed within the container by introducing either a liquid derived from said gas or vapor or a liquid refrigerant from an external source into the interior of a hollow condensing element mounted in the container with its outer surface in contact with said gas or vapor inside the container, and then exhausting the contents of the condensing element to cool the outer surface thereof to a temperature below the condensation temperature of said gas or vapor.

Abstract: A garden cloche comprising an umbrella structure, a spike 12 and a handle 11. A canopy 10 of transparent sheet plastics material is supported on a framework so that an apex part 23 of the shaft 20 projects through the canopy and carries the handle above the canopy. A bottom end part 32 of the shaft serves as or is located in said spike means which is inserted into the soil 40 of a garden to locate the periphery 30 of the canopy proximal to the surface of the soil 40.

Abstract: A gas powered motor has a reservoir for liquefied gas, a supply passage from the reservoir leading through one side of a heat exchanger to the motor and a container holding a buffer substance in heat conductive relationship with the reservoir. The buffer substance acts to supply heat to the liquefied gas while undergoing a chemical, physical crystallographic or other change of state to assist in maintaining the supply of gas to the motor from the reservoir. The motor exhaust leads to a vessel containing a condensing buffer substance which absorbs, persorbs or otherwise associates with the gas accompanied by a release of heat. The condensing buffer substance is in heat conductive relation with the other side of the heat exchanger in the gas supply to the motor to superheat the gas supplied.

Abstract: A gas-operated motor system of the stored energy type--as disclosed in U.S. Pat. No. 4,092,830--in which the gas exhausted from the motor is ducted to a chamber during operation of the motor and thereafter compressed back into the gas reservoir vessel. Recompression may be achieved e.g. by providing the exhaust gas chamber with a movable piston, or by running the motor in the reverse mode as a compressor.