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5447034 |
Cryogenic refrigerator and regenerative heat exchange material
A cryogenic refrigerator includes a first refrigerant filled in a final refrigerating force storage chamber on a high temperature side thereof and consisting essentially of a composition expressed...
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5447033 |
Multi-stage cold accumulation type refrigerator and cooling device including the same
In a multi-stage cold accumulation type refrigerator including a compressor disposed at an ordinary temperature, a helium gas as a common operating fluid to be compressed by the compressor, and one...
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5442923 |
Rotary compressor or rotary displacement pump
A rotary fluid displacement machine includes a stator having a wall provided with an inner wall face defining a work chamber; shaft bearings supported in the stator; a rotor; a rotor drive shaft...
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5440883 |
Pulse-tube refrigerator
A double piston type pulse-tube refrigerator includes a compression cylinder, a compression piston reciprocably disposed within the compression cylinder, an expansion cylinder, an expansion piston...
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5438848 |
Product freezer utilizing a Stirling cycle refrigerator
A Stirling cycle refrigerator comprises a refrigerating force supplying section including a Stirling freezing unit driven in Stirling cycle, a motor for driving the Stirling freezing unit, and a...
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5435136 |
Pulse tube heat engine
A pulse tube refrigerator includes a compression space defined by a compression piston inside a cylinder, an expansion space defined by an expansion piston inside a cylinder, the expansion piston...
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5435137 |
Ternary Dy-Er-Al magnetic refrigerants
A ternary magnetic refrigerant material comprising (Dy 1 -x Er x )Al 2 for a magnetic refrigerator using the Joule-Brayton thermodynamic cycle spanning a temperature range from about 60K to about...
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5429177 |
Foil regenerator
This invention relates to compact, high efficiency foil regenerators for use in regenerative gas cycle (e.g. Stirling cycle, Ericsson cycle, Vuilleumier cycle, Gifford-McMahon cycle, Sibling Cycle...
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5412952 |
Pulse tube refrigerator
The present invention provides a pulse tube refrigerator, comprising a regenerator having an inlet port and an outlet port, a pulse tube having one end portion connected in series to the outlet...
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5412950 |
Energy recovery system
This invention is a gas wave refrigeration method and a corresponding device used in an energy recovery system, which employs a mechanism creating a pulsating flow wave resonant interactions to...
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5412951 |
Cyrogenic cooling system with active vibration control
A cryogenic cooling system having a mechanism for canceling vibration at a fundamental frequency and at harmonics thereof. The inventive system includes a first apparatus (28, 32) for cooling a...
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5406801 |
Thermally operated refrigerator
A thermally operated refrigerator includes a hot space absorbing a heat from an outer heat source at a high temperature, an ambient space having a first portion and a second portion, a heat...
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5400599 |
Hot gas machine
Gas displacement volumes of a high temperature chamber and a middle temperature chamber in a high temperature portion of a hot gas machine are different. Alternatively, a gas displacement volume of...
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5398511 |
Regenerative refrigerator
According to the present invention there is provided a regenerative refrigerator wherein a gas discharged from a compressor is introduced through a regenerator into a closed chamber whose internal...
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5398512 |
Cold accumulation type refrigerating machine
A cold accumulation type refrigerating machine having a high refrigeration efficiency. Rotation output of a stepping motor is converted to a reciprocative motion of a displacement member carrying a...
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5392607 |
Stirling-cycle cyrogenic cooler using adaptive feedforward vibration control
A Stirling-cycle cryogenic cooler that employs a vibration control procedure based on adaptive feedforward principles. The vibration control procedure is particularly adapted for use as a...
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5385010 |
Cryogenic cooler system
A cryogenic cooler system which allows continuous and uninterrupted cooling ithin the system with minimized moving parts. A compressor assembly is included with more than one compressor so that at...
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5385021 |
Free piston stirling machine having variable spring between displacer and piston for power control and stroke limiting
Free piston Stirling coolers and engines are improved by a spring coupling the displacer to the piston and having a variable spring constant. Controllable variation of its spring constant permits...
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5367880 |
Displacer apparatus of a split stirling cooler
There is disclosed a Stirling cooler comprising a compressor and a displacer apparatus. To prevent undesirable displacement of a displacer due to leakage of working fluid, the displacer apparatus...
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5361588 |
Cryogenic refrigerator
In a cryogenic refrigerator using a Gifford MacMahon (GM) cycle, a rotary valve device (RV) for controlling the supply and discharge of refrigerant gas with respect to the refrigerator (2) is...
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5357757 |
Compression-evaporation cooling system having standing wave compressor
A compressor for compression-evaporation cooling systems, which requires no moving parts. A gaseous refrigerant inside a chamber is acoustically compressed and conveyed by means of a standing...
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5355679 |
High reliability gas expansion engine
An expansion engine incorporates various structural features in which all cold seals are stationary, and only warm seals move. Moving parts which are subject to cryogenic temperatures are designed...
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5351490 |
Piston/displacer support means for a cryogenic refrigerator
A cryogenic refrigerator comprises a compressor including a compressor housing within which a cylinder is mounted, and a piston reciprocal within the cylinder, and a cold finger including a low...
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5349823 |
Integrated refrigerated computer module
The present invention is an integrated computer module that has a chip carrier assembly attached to a cryogenic cooler. The carrier assembly includes a multichip that has a CPU comprising a...
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5345769 |
Cryogenic refrigeration apparatus
A system for providing a cold environment which has a number of cooling stages with variable displacement volumes into which input fluid from a compressor flows in an input channel to and from the...
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5343707 |
Methods and apparatus for removing cyclic noise from the output signal of a magnetic sensor
A cyclic noise removing method first generates a template of a cyclic noise caused by a cryogenic refrigerator, which template is generated by arithmetically averaging the output signal from a...
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5339640 |
Heat exchanger for a thermoacoustic heat pump
The efficiency of a thermoacoustic device including a gas-filled, elongated resonator tube (10), an acoustic driver (16) and a tube (10) for establishing a standing wave therein, an elongated stack...
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5339639 |
Freon free refrigerator
A refrigerator includes a cylinder containing a bed of adsorbent material and a gas, e.g. carbon dioxide. A piston compresses the gas which is adsorbed by the adsorbent material and the heat of...
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5335506 |
Regenerative heat pump
A regenerative heat pump includes a main compartment divided into three chambers by two reciprocable displacers. Gas in the main compartment is heated. A drive mechanism is driven by a start-up...
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5333460 |
Compact and serviceable packaging of a self-contained cryocooler system
A 250 watt cryocooler employs a Stirling cycle and is capable of maintaining a constant temperature of 77° K. while fitting a standard electronic equipment rack.
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5332029 |
Regenerator
Disclosed is a regenerator loaded with a relatively cheap heat regenerative material which exhibits excellent specific heat, heat transfer capability and recuperativeness under cryogenic...
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5323615 |
Cryogenic cooler
A closed system for effecting cryogenic cooling. The system includes a cylinder which houses therewithin a piston disposed for reciprocation within the cylinder. The cylinder is in fluid...
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5319948 |
Low temperature generation process and expansion engine
In a low temperature generation process, compressed gas (3) at high pressure enters from an inlet nozzle (1) and alternately expands into one of two resonator tubes (A,B) of an expansion engine....
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5319938 |
Acoustic resonator having mode-alignment-canceled harmonics
An acoustic resonator includes a chamber which contains a fluid. The chamber has a geometry which produces self-destructive interference of at least one harmonic in the fluid to avoid shock wave...
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5318412 |
Flexible suspension for an oil free linear motor compressor
This invention relates to linear motor compressors which operate without the use of oil and a gas bearing while providing a flexible suspension for such a compressor. Such structures of this type,...
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5317874 |
Seal arrangement for an integral stirling cryocooler
The seal bellows of a Stirling cycle device is connected between the bottom of a reciprocating piston and a cylinder wall to form a buffer space between the cycle working space and the lubricated...
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5317878 |
Cryogenic cooling apparatus
The invention provides a controlled connection, or heat switch, between a source of cryogenic cooling and an item which is to be cooled, using control valve means which is not itself subjected to...
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5309716 |
Rotary pump or engine with spherical body
There is disclosed a rotary pump or engine or compressor or expander comprising a spherical cavity divided by a pivotable disc into two sections. First and second wedges are pivotally connected at...
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5303555 |
Electronics package with improved thermal management by thermoacoustic heat pumping
Electronic chips are cooled to an efficient operating temperature by engaging their exposed planar surfaces with a heat sink assembly. The heat sink assembly is a part of the cold end heat sink of...
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5301506 |
Thermal regenerative device
Vuilleumier type heat pumps and other thermal regenerative devices of the same type are improved by the provision of agitation and circulation of the working fluid within the working spaces for...
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5295355 |
Multi-bypass pulse tube refrigerator
A multi-bypass pulse tube refrigerator comprising a pressure wave generator, a regenerator, a heat exchanger of cold ends (cold finger), a pulse tube, an orifice means and a reservoir volume,...
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5293748 |
Piston cylinder arrangement for an integral Stirling cryocooler
The guide portion of the cylinder of a Stirling cycle device is located at least partially within and is axially coextensive with the bellows thereby providing a reduction in the height/length of...
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5284022 |
Stirling cycle type cold air generating device
A Stirling cycle type cold air generating device comprising a Stirling module having a module cylinder and a module piston disposed in the module cylinder to be vertically reciprocated, a magnetic...
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5275002 |
Pulse tube refrigerating system
A pulse tube refrigerating system includes a first space, a second space, a pulse tube disposed between the first and the second spaces so as to constitute a closed operating space in which an...
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5269147 |
Pulse tube refrigerating system
A pulse tube refrigerating system comprising a compressing cavity for compressing a working fluid, a heat radiator connected with the compressing cavity and a regenerator connected with the heat...
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5269854 |
Regenerative material
The present invention provides a regenerative material having a peak specific heat at a low temperature. The material is made of a solid solution of at least two different magnetic type metal...
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5261799 |
Balanced linear motor compressor
This invention relates to balanced linear motor compressors which operate without the use of oil and externally tuned resonant balancers. Such structures of this type, generally, provide a highly...
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5259197 |
Compression type heat pump
The present invention relates to a compression type heat pump which can obtain cooling and heating output by way of pressure changes in gases, comprising a casing member formed with a housing space...
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5255521 |
Gas cycle engine for refrigerator
A gas cycle engine for a small-sized, low-vibration and long-life refrigerator which is high in centering accuracy of a moving member and excellent in durability. In the gas cycle engine for such a...
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5251448 |
Heat machine
A heat machine comprising a displacer reciprocating within a housing. The displacer incorporates first and second independent, co-axial, overlapping regenerators. A first working volume is formed...
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