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8181460 |
Thermoacoustic driven compressor
The present disclosure details a thermoacoustic driven compressor having a pressurized housing, which contains within a thermoacoustic engine and a working gas, coupled to a positive displacement...
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8171742 |
Pressure wave generator
A pressure wave generator (40) for driving one or more cryogenic refrigerator systems. The pressure wave generator (40) comprises a housing with one or more inlet/outlet ports (57,58) through which...
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8171741 |
Electrically conductive shield for refrigerator
A cryogenic magnet system, comprising a cryogenic vessel (1) housing a magnet winding, a vacuum jacket (3) enclosing the cryogenic vessel and a refrigerator (4) at least partially housed within the...
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8127560 |
Machined spring with integral retainer for closed cycle cryogenic coolers
A retainer and spring with threaded end are machined from a single piece of material for threading to a piston in a closed cycle cryogenic cooler. Since the machined retainer and spring are a...
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8117850 |
Refrigeration apparatus having warm connection element and cold connection element and heat pipe connected to connection elements
A heat pipe arranged between warm and cold connection elements is intended to be filled at least partially with a refrigerant, which can be circulated in the heat pipe by a thermosiphon effect. The...
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8117861 |
Cooling arrangement for an electrical connector for a superconductor
A cooling arrangement for an electrical connector for a superconductor including at least one superconductor arranged in a container and the container is arranged in a vacuum chamber. A cryocooler...
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8079224 |
Field integrated pulse tube cryocooler with SADA II compatibility
A unitary pulse tube expander for removable attachment to a SADA II coldfinger and insertion within a Dewar assembly. The regenerator of the pulse tube expander is encased in a regenerator sleeve...
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8079825 |
Sensor-less control method for linear compressors
A method of protecting a cylinder of a compressor comprising a piston, a linear permanent magnet (PM) having a coil and a magnet, and a sensor-less control of the PM for moving the piston in and...
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8074457 |
Folded cryocooler design
A compact cryocooler includes a gas compression piston (304) supported for reciprocal linear translation along a first longitudinal axis (308) and a gas displacing piston (362) supported for...
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8069675 |
Cryogenic vacuum break thermal coupler
A novel thermal coupler apparatus and method to couple a cryocooler or another cooling device to a superconducting magnet or cooled object allows for replacement without a need to break the...
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8069676 |
Water vapor distillation apparatus, method and system
A fluid vapor distillation apparatus. The apparatus includes a source fluid input, and an evaporator condenser apparatus. The evaporator condenser apparatus includes a substantially cylindrical...
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8065882 |
Compositions containing fluorine substituted olefins
Disclosed are the use of fluorine substituted olefins, including tetra- and penta-fluoropropenes, in a variety of applications, including connection with blowing agents, foams, foamable...
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8037695 |
Fault current limiter
A fault current limiter comprising: an input node; an output node; a variable impedance element coupled between the input node and the output node; a closed loop cryocooler circuit, comprising a...
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8037693 |
Method, apparatus, and system for cooling an object
A method for cooling an object includes coupling a cooling device to the object, wherein the cooling device includes at least one thermoacoustic engine and a plurality of gas diodes, generating...
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8033120 |
Compositions and methods containing fluorine substituted olefins
The use of pentafluoropropene (HFO-1225) and tetrafluoropropene (HFO-1234) in refrigeration equipment is disclosed. These materials are generally useful as refrigerants for heating and cooling, as...
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8015831 |
Cryocooler split flexure suspension system and method
A cryocooler in which two independently moving flexure systems are split across a single magnetic structure, decreasing package size and increasing resistance to cantilevered mass sag due to...
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7997088 |
Hybrid spool valve for multi-port pulse tube
The problems of reducing the torque required to turn the valve, eliminating wear dust, and extending the life of the valves in Gifford McMahon (G-M) type multi-port pulse tube refrigerators are...
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7987679 |
Air conditioning apparatus
By studying or storing refrigerating cycle characteristics of an air conditioning apparatus at the normal time and comparing them with refrigerating cycle characteristics acquired from the air...
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7937955 |
Solar and wind hybrid powered air-conditioning/refrigeration, space-heating, hot water supply and electricity generation system
A system for environmental control includes a hybrid wind and solar energy collection subsystem; a temperature control subsystem having a thermo-mechanical engine; an electrical generating...
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7914628 |
Magnetic refrigeration material and method of manufacturing thereof
A magnetic material comprising a NaZn13 type crystal structure with uniform and fine microstructure exhibiting excellent characteristics as a magnetic refrigeration material, and a method of...
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7908856 |
In-line stirling energy system
A high efficiency generator is provided using a Stirling engine to amplify an acoustic wave by heating the gas in the engine in a forward mode. The engine is coupled to an alternator to convert...
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7897898 |
Heat generator comprising a magneto-caloric material and thermie generating method
A heat generator comprising a magneto-caloric material and a method for generating efficient and reliable thermies enabling of substantially limiting displaceable inert masses in order to produce a...
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7832209 |
Miniaturised device that can operate as an engine or a cooler according to a stirling thermodynamic cycle
Miniaturised device, which can operate as an engine or a cooler according to a Stirling thermodynamic cycle, comprising an expansion chamber and a compression chamber, which are interconnected by...
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7833361 |
Alloy and method for producing magnetic refrigeration material particles using same
An alloy is used for production of magnetic refrigeration material particles. The alloy contains La in a range of 4 to 15 atomic %, Fe in a range of 60 to 93 atomic %, Si in a range of 3.5 to 23.5...
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7805934 |
Displacer motion control within air engines
Methods and apparatus are disclosed for generating power. A thermodynamic air engine is configured to convert heat provided in the form of a temperature differential to mechanical energy. The...
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7804046 |
Acoustic heater and acoustic heating system
In order that an object can be warmed through the use of thermoacoustic effect, the acoustic heating apparatus includes a first stack 3a sandwiched between a high-temperature-side heat exchanger 4...
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7784300 |
Refrigerator
This invention provides a refrigerator using a gaseous working fluid such as air and based upon the well-developed structure of reciprocating compressors or rotating engines. The invention combines...
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7779640 |
Low vibration cryocooler
Disclosed are a low vibration cryocooler and a method of reducing vibration in a cryocooler. The cryocooler can be a Stirling class cryocooler includes at least one motor that drives a mass, the...
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7775041 |
Stirling engine
A Stirling engine, wherein the inner yoke of a linear motor is installed on the outer peripheral surface of a cylinder. To keep a proper pressure balance between a compression space on one end side...
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7775239 |
Buffered rotary valve
There is provided a buffered rotary valve in which a valve is additionally installed in a rotary valve for supplying a fluid of high pressure and a fluid of low pressure being input from a...
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7694514 |
Direct contact thermal exchange heat engine or heat pump
Systems and methods for operating a thermodynamic engine are disclosed. The systems and methods may effect cyclic motion of a working fluid between hot and cold regions of a thermodynamic engine...
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7654096 |
Reduced torque valve for cryogenic refrigerator
A rotary valve unit which reduces the torque required to turn the valve disc, and the amount of wear dust that is blown into the cold head, using differential gas forces to keep the valve disc in...
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7631505 |
Wearless valve for cryorefrigerator
An improved method of reducing wear dust and torque required to turn a multi-port rotary disc valve utilizes a thrust bearing to hold the valve seat and/or valve disc such that they are not in...
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7628022 |
Acoustic cooling device with coldhead and resonant driver separated
An acoustic cooling device is provided. A coldhead and an acoustic power source of the acoustic cooling device are separated by way of a long tube connecting them to enable the cold tip to be...
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7614240 |
Control method for pulse tube cryocooler
Method of controlling a pulse tube cryocooler in which the power input to the acoustic source is varied to maintain temperature of a refrigeration load or a temperature that is at least referable...
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7603866 |
Thermoacoustic apparatus
In order to reduce the time until an acoustic wave is generated and perform heat exchange smoothly in a stack, a thermoacoustic apparatus 1 includes a first stack 3a sandwiched between a first...
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7600386 |
Pulse tube cryogenic cooler
A pulse tube cryogenic cooler, includes: a pressure vibration generating device configured to generate pressure vibration in operation gas; a regenerator connected to the pressure vibration...
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7600385 |
Pulse tube cryogenic cooler
A pulse tube cryogenic cooler, includes a cold storage device cartridge whose high temperature end is connected to a pressure change source; a pulse tube whose low temperature end is connected to a...
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7594406 |
Regenerator and cryogenics pump
The invention has an object to provide a regenerator and cryogenics pump using a regenerator material which fulfills such requirements as specific heat, thermal conductivity, manufacturing...
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7587896 |
Cooled infrared sensor assembly with compact configuration
An integrated sensor assembly (10) includes a gas compression unit (104) having a first longitudinal axis (308) and a gas expansion unit (112) having a second longitudinal axis (366) and the gas...
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7568351 |
Multi-stage pulse tube with matched temperature profiles
Convection losses associated with different temperature profiles in the pulse tubes and regenerators of multi-stage pulse tubes mounted in helium gas in the neck tube of a MRI cryostat are reduced...
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7568353 |
Method of storing biological samples
A method of storing biological samples in which the biological samples are stored in a stack within a vessel interior of an insulated vessel. A pool of liquid cryogen is maintained within the...
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7568521 |
Wellbore formation evaluation system and method
A formation evaluation tool positionable in a wellbore penetrating a subterranean formation is provided. The formation evaluation tool includes a cooling system adapted to pass a cooling fluid...
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7555908 |
Cable drive mechanism for self tuning refrigeration gas expander
A refrigeration device includes a gas displacing piston (362) movable within a gas expander cylinder (364). The volume of a gas expansion space (362) is varied as the gas displacing piston (362) is...
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7549296 |
Low temperature cryocooler regenerator of ductile intermetallic compounds
A multi-stage cryocooler having a relatively low temperature stage to cool to less than about 15K and having a regenerator including a ductile intermetallic compound including one or more rare...
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7549295 |
Three track valve for cryogenic refrigerator
A multi valve two-stage pulse tube type GM refrigerator having a rotary valve that comprises one track for flow to the regenerator and two tracks for flow to the pulse tubes where the valve has two...
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7509814 |
Compact integrated buffer for pulse tube refrigerator
A range of buffer volume/pulse tube volume ratios for two-stage hybrid GM type pulse tube cold-heads that are designed to produce refrigeration at 4 K are provided. The ranges of volume ratios for...
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7500366 |
Refrigerator with magnetic shield
A magnetic shield is mounted in its own vacuum enclosure in a regenerative type expander comprising a vacuum enclosure, magnetic material in a cold regenerator, and a magnetic shield, where the...
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7500367 |
Cooled cryostat device
A cooled cryostat device comprising: a cold finger having infrared detector means secured to the end thereof; an outer casing surrounding the cold finger; and stiffener means for stiffening the...
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7497084 |
Co-axial multi-stage pulse tube for helium recondensation
A two-stage pulse tube refrigerator having a compact design, low vibration and low heat loss is provided where at least the 2nd stage is co-axial but preferably, both stages are co-axial with the...
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