Abstract: The sensor assembly includes a sensor tube in communication with the inner tank. A flush line extending from the liquid cryogen fill line is connected to the sensor tube at a three-way valve. The three way valve also connects the sensor tube to a pressure transducer. During normal operation, the sensor tube is in communication with the pressure transducer such that the level of liquid in the dewar can be monitored. When the liquid level falls below a predetermined level, the pressure transducer activates the three-way valve to connect the sensor tube to the flush line and opens a solenoid located in the fill line. As the cryogen liquid enters the fill line, a portion of it is diverted through the flush line, is vaporized and is passed through the sensor tube. The relatively warm gas flow in the sensor tube prevents the formation of ice and eliminates the problems associated therewith.

Abstract: A supply tank having a plurality of dip tubes extending therein is provided. One dip tube is provided for each storage tank that is to be filled by the supply tank. The dip tubes are of different lengths, and their lengths are related to the amount of syrup each dip tube is to deliver. A source of compressed gas communicates with the tank to force the syrup in the tank up the desired dip tube and into the delivery line connected to the onsite syrup storage tank. When the level of syrup in the tank falls below the end of the dip tube through which delivery is being made, the flow of fluid therethrough stops, and the compressed gas forces all of the syrup in the delivery line into the storage tank. By controlling the length of the dip tubes the amount of syrup delivered can be controlled.

Abstract: The delivery system of the invention overcomes the above-noted shortcomings and consists of at least two stainless steel, rigid syrup storage tanks. The tanks are connected to a carbonated beverage mixer and dispenser via a automatic vacuum selector valve. The valve operates to change over between tanks when the tank providing syrup becomes empty and a vacuum is created in the supply line to the selector valve. The vacuum is created in the supply line by an automatically operating valve that closes the supply line when the tank is empty. A cleaning system is also provided that can be connected to the vent of the empty tank to clean it before it is refilled with syrup. A drain line cooperates with the valve to maintain the valve in its open position and allow the cleaning fluid to drain from the tank.

Abstract: A carbonated beverage delivery system having at least two syrup storage tanks. Each storage tank is provided with a valve that allows air to vent from the tank during delivery, acts as a nozzle to deliver cleaning solution during clean-up operations and, most significantly, meters the amount of fluid delivered to the tank and prevents inadvertent overfill. The tanks are also provided with a syrup feed pipe and drain pipe for filling and discharging the tank, respectively. The drain pipe can be connected to a mixing valve that also receives carbon dioxide and water from separate sources. These components are mixed at the mixing valve to create the desired carbonated beverage which is then delivered to a beverage dispenser. The feed pipe can be connected to a delivery truck supply tank such that its supply of syrup can be replenished. The volume of syrup carried by the truck supply tank is less than the total volume of all the storage tanks to be filled from the supply tank.

Abstract: The regulator of the invention includes a pressure builder inlet, economizer outlet and a pressure builder outlet/economizer inlet. A valve is moved in response to the pressure of the gas head in the tank to connect the pressure builder outlet/economizer inlet with either the pressure builder inlet or economizer outlet. As a result, the single dual-function regulator of the invention allows gas to be delivered from either the gas head or the liquid body as determined by the pressure of the gas head. A manual pressure build up valve is provided to allow isolation of the pressure build up system.

Abstract: The delivery system of the invention consists of a pair of LNG fuel tanks mounted on a vehicle. A solenoid valve associated with each tank allows the vehicle operator to select the tank from which LNG is to be delivered to the engine. An automatic override system is provided whereby if the pressure in the non-selected tank rises above a predetermined level, the operator's tank selection is overridden and gas from the non-selected tank is used until the pressure falls below the predetermined level. This override system eliminates the need to vent gas to the atmosphere to avoid pressure build up and thereby eliminates waste of the LNG. Each tank is also provided with a pressure building capability such that the gas will always be delivered to the engine with sufficient pressure. The system is designed such that LNG from a stationary low pressure storage tank can be delivered at high pressure to refuel the tanks.

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.

Abstract: An improved carbonated beverage storage and dispensing system is disclosed which employs separate tanks for carbon dioxide and syrup. Mixing occurs during dispensing. For each type of syrup there are preferably two syrup supply tanks. Each syrup tank may be selectively connected to either a syrup filling source or to a sanitizing system for cleaning the tank. This system allows one of the syrup supply tanks to be sanitized or refilled, while another supplies syrup for dispensing, thus allowing uninterrupted beverage service.