Abstract: The invention consists of an outer jacket surrounding and spaced from an inner tank to create an insulated space therebetween. The inner tank closely conforms to the outer jacket such that the insulation chamber is substantially uniform and the capacity of the inner tank is increased. An insulated support assembly that extends into the inner tank allows communication between the exterior of the vessel and the inner tank for pipes, pressure gauges and the like. The support assembly allows for a long insulated path without reducing the capacity of the tank to the same extent as the prior art devices.

Abstract: A cryogenic meter is mounted in an insulated container having an inlet and outlet in circuit with the LNG delivery flow path. The container is filled with LNG to a level above the cryogenic meter to pre-cool it to a desired operating temperature. To maintain the level of LNG in the container during use and to separate vapor from liquid, a float device allows vapor to be returned to the storage tank from the container to refill it with LNG. Because the meter is continuously immersed in LNG during use, it is maintained at a constant temperature permitting the quantity of LNG delivered to a use device to be accurately metered. Temperature and/or pressure signals are sent to a microprocessor which computes the density of the LNG and displays the metered amount of LNG on a display.

Abstract: The invention consists of at least one layer of super insulation surrounding the vessel containing the cryogenic liquid. A thin layer of high temperature insulation surrounds the super insulation. Both layers of insulation are surrounded by an outer jacket.

Abstract: Liquid natural gas is pumped into a main tank until the main tank is completely filled with liquid. Once filled, high pressure gas is pumped into the main tank. This high pressure gas forces the liquid from the main tank into an overflow tank until the liquid level in the main tank reaches a predetermined level. High pressure gas is then pumped through the main tank to the overflow tank until the LNG in the overflow tank is saturated at a pressure slightly higher than the pressure needed at the use device. Once the desired pressure is achieved the delivery of LNG to the delivery system is stopped. LNG is initially delivered from the overflow tank to the use device as a high pressure gas. Some of the high pressure gas being delivered from the overflow tank is diverted from the use device to saturate the LNG in the main tank at the desired pressure.

Abstract: A pressure building circuit for a double-walled tank containing a low temperature fluid, including a settling ring and an orifice between the tank outlet and the pressure building coil for maintaining a minimum pressure.