Abstract: A cryogenic delivery tank includes a vessel having inner and outer shells and an interior that may contain a cryogenic liquid with a headspace above. A transfer pipe passes through the interior of the vessel and includes a head space coil positioned within an upper portion of the interior and a liquid side coil positioned in the lower portion of the interior. The transfer pipe has a first port adjacent to the head space coil and a second port adjacent to the liquid side coil. The first and second ports of the transfer pipe are configured to be removably attached to a second tank.

Abstract: An annular seal for sealing an opening in a pump housing surrounding a piston rod includes a primary sealing portion with an inner surface adjacent to the piston rod and an outer surface adjacent to the pump housing. An initial sealing portion features an inner wall and an outer wall so that an annular space is defined therebetween. A top wall extends between the inner and outer walls. A coil spring is positioned within the annular space of the initial sealing portion and urges the inner wall into engagement with the piston rod and the outer wall into engagement with the pump housing.

Abstract: A body structure has an inlet port that receives fluid, a first outlet port that connects to a top-fill line of a cryogenic tank, a second outlet port that connects to a bottom-fill line of a cryogenic tank and a slider tube cylinder. A cylinder housing connects to the body structure and has a pressure comparison cylinder with upper and lower volumes, with the latter in fluid communication with a cryogenic tank. A piston having a piston shaft slides within the pressure comparison cylinder. A pressure regulator is in fluid communication with the upper volume and the slider tube cylinder. A slider tube is connected to the piston shaft and slides within the slider tube cylinder. The slider tube cylinder selectively directs fluid to a top-fill line through the first outlet port or to a bottom-fill line through the second outlet port.

Abstract: A system for cryogenic gas delivery includes a cryogenic tank configured to contain a cryogenic liquid and a gas within a headspace above the cryogenic liquid. The system also includes first and second vaporizers and a use outlet. A first pipe is configured to transfer gas from the headspace through the first vaporizer to the use outlet. A second pipe is configured to transfer liquid from the tank through the first vaporizer so that a first vapor stream is directed to the use outlet. A third pipe is configured to build pressure within the tank by transferring liquid from the tank through the second vaporizer so that a second vapor stream is directed back to the headspace of the tank. A first regulator valve is in fluid communication with the second pipe and opens when a pressure on an outlet side of the first regulator drops below a first predetermined pressure level.

Abstract: A dosing vessel includes a reservoir having an inlet and an outlet and is configured to contain a supply of a cryogenic liquid with a headspace above. The outlet is configured to be connected to a dosing arm having a dosing head. A low pressure sensor is configured to detect a vapor pressure in the headspace. A high pressure sensor is configured to detect a pressure in a bottom portion of the reservoir. An inlet valve is in fluid communication with the inlet of the reservoir and is placed in communication with a source of cryogenic liquid.

Abstract: Gas pressure actuated fill termination valves for cryogenic liquid storage tanks and storage tanks containing the same.

Abstract: A doser for dispensing a cryogenic fluid includes a doser body configured to receive the cryogenic fluid. A dosing arm has a proximal end and a distal end, with a central passage extending between the proximal and distal ends and configured to receive cryogenic fluid from the doser body. Multiple dosing heads are mounted to the distal end of the dosing arm with each of the dosing heads including a dosing valve. The dosing heads are configured to receive cryogenic fluid from the central passage of the dosing arm and to dispense the cryogenic fluid when the dosing valve is opened.

Abstract: A storage tank system features a tank made of rigid material and an insulation assembly. The insulation assembly includes an inner membrane and an outer membrane wherein the inner membrane is located within the outer membrane and at least one of the inner membrane and outer membrane is made of a flexible material. An insulation medium is located in a space between the inner membrane and the outer membrane and a vacuum is applied to the space.

Abstract: Gas pressure actuated fill termination valves for cryogenic liquid storage tanks and storage tanks containing the same.

Abstract: A tank is configured to store a supply of cryogenic liquid and a heat exchanger has a main line and a reheat line. A liquid pickup line directs cryogenic liquid from the tank to the main line of the heat exchanger. A trim heater exit tee receives fluid from the main line of the heat exchanger. Fluid exits the trim heater exit tee through an engine outlet and a trim heater outlet. Fluid exiting through the engine outlet flows through a flow restriction device and to a primary inlet of a trim heater return tee. A trim heater line receives fluid from the trim heater outlet of the trim heater exit tee and directs it to the reheat line of the heat exchanger after the fluid passes through a portion of the trim heater line positioned within the tank. Warmed fluid leaving the reheat line of the heat exchanger travels to a trim heater inlet of the trim heater return tee.

Abstract: A system for dispensing cryogenic liquid includes a container defining an interior with a partition dividing the interior into primary and reserve chambers. Cryogenic liquid within the primary chamber is separated from cryogenic liquid in the reserve chamber. The partition provides a headspace cornrnurrrcation passage. A primary pressure building circuit has an inlet selectively in liquid communication with the primary chamber and an outlet in fluid communication with the headspaces of the primary and reserve chambers. A reserve pressure building circuit has an inlet selectively in liquid communication with the reserve chamber and an outlet in fluid communication with the headspaces of the primary and reserve chambers. An equalizing circuit is selectively in liquid communication with the primary and reserve chambers. A dispensing line is selectively in liquid communication with the primary chamber.

Abstract: A cryogenic liquid dispensing system having a tank that holds cryogenic liquid and a basin configured to hold cryogenic liquid at a height above a bottom portion of the tank. The system is configured to pump cryogenic liquid for dispensing from the bottom portion of the tank when the cryogenic liquid in the tank is of a sufficient level to provide an adequate liquid head to permit pump operation, and is configured to pump cryogenic liquid for dispensing from the basin when the liquid in the tank is of an insufficient level to provide an adequate liquid head to permit pump operation to dispense cryogenic liquid.

Abstract: A cryogenic fluid delivery system includes a main tank system with a main tank adapted to contain a first supply of cryogenic liquid, and reserve tank system with reserve tank adapted to contain a second supply of cryogenic liquid. A pressure building circuit is adapted to delivery vapor to the head space of the main tank to build pressure in the main tank and a fuel delivery line supplies cryogenic fuel from either the main tank or the reserve tank to a use device. The reserve tank stores saturated cryogenic fuel that is delivered to the use device via the fuel delivery line while the cryogenic liquid in the main tank is being saturated. The fluid delivery system automatically switches to delivering cryogenic fuel from the main tank to the use device via the fuel delivery line upon saturation of the cryogenic liquid in the main tank.

Abstract: A system for dispensing a cryogenic fluid includes a bulk storage tank configured to contain a supply of the cryogenic fluid. A heat exchanger coil is positioned in the headspace of at least one intermediate fluid tank, which contains an intermediate fluid, and is configured to receive and warm a cryogenic fluid from the bulk storage tank via heat exchange with intermediate fluid vapor in the headspace. A buffer tank receives fluid from the heat exchanger coil. A chiller coil is positioned within the intermediate fluid tank and is submerged within intermediate fluid liquid contained within the at least one intermediate fluid tank. The chiller coil receives fluid from the buffer tank and cools it via heat exchange with intermediate fluid liquid within which the chiller coil is submerged for dispensing.

Abstract: A dental charting system and method of generating a dental chart are provided. The dental charting system comprises a display unit, an input unit and an output unit. The display unit is configured to display a quadrant view of a set of teeth. The quadrant view comprises a quadrant subset of the set of teeth, and at least one of a diagnosis field and a procedure field for each tooth in the quadrant subset. Each tooth in the quadrant subset displayed having a crown, a root and an outline. The input unit is configured to receive an input for at least one of the diagnosis field and the procedure field for at least one tooth in the quadrant set of teeth. The output unit is configured to generate a dental chart displaying the set of teeth. Each tooth in the set of teeth displayed in a color associated with the received input for at least one of the diagnosis field and the procedure field.

Abstract: An integrated cryogenic fluid delivery system includes a tank adapted to hold a supply of cryogenic liquid and having an end wall. A shroud is positioned on the end wall and contains a shell and tube heat exchanger. The heat exchanger includes a shell defining a warming fluid chamber and having a shell inlet and a shell outlet in fluid communication with the warming fluid chamber. A number of cryogenic fluid coils are positioned within the warming fluid chamber and are in fluid communication with a cryogenic fluid inlet port and a cryogenic fluid outlet port. A fuel shutoff valve has an inlet in fluid communication with a liquid side of the tank and an outlet in fluid communication with the cryogenic fluid inlet port of the heat exchanger. A manual vent valve has an inlet in fluid communication with a headspace of the tank and an outlet. The fuel shutoff valve and the manual vent valve each have a control knob that is accessible from the first or second side of the shroud.

Abstract: A system for transferring cryogenic fluid from a dispensing tank to a receiving tank is disclosed. The dispensing tank stores a supply of cryogenic liquid with a dispensing tank headspace above the liquid. A compressor has an inlet connected to the headspace of a receiving tank and an outlet connected to the headspace of the dispensing tank. A liquid transfer line is in fluid communication with the liquid side of the dispensing tank and the receiving tank. Cryogenic liquid is transferred from the dispensing tank to the receiving tank when the compressor is activated so as to transfer vapor from the headspace of the receiving tank to the headspace of the dispensing tank to create a pressure differential between the dispensing and receiving tanks.

Abstract: A cryocooler is described that can include a pressure wave generator, and a refrigeration device (for example, a cold-head), which can be used to liquefy a gas when the gas is exposed to a surface of the refrigeration device. The pressure wave generator can include one or more motors. Each motor can include a stator, and at least one electrical coil wound around a portion of the stator. The electrical coil can generate a reversing magnetic field when alternating electric current is passed through the electrical coil. The motor can further include a pressurized container that can be placed within the space enclosed by the stator, and a piston that can be placed inside the pressurized container. The stators can be placed external to the pressurized container. The piston is made by combining magnets that have opposite and transverse polarities, and are combined adjacently on a common reciprocating axis.