Class 505/891 - Magnetic or electrical effect cooling

Subclass of Class 505 - Superconductor technology: apparatus, material, process
Definition: Subject matter wherein electromagnetic force is used to
No. of patents: 34
Last issue date: 10/03/2006

Number	Title	Issue Date
7114340	Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys An alloy made of heat treated material represented by Gd5(SixGe1−x)4 where 0.47≦x≦0.56 that exhibits a magnetic entropy change (−ΔSm) of at least 16 J/kg K, a magnetostriction of at least 2000 parts per...	10/03/2006
6069395	Current leads adapted for use with superconducting coil and formed of functionally gradient material Current leads are used for connecting a power supply placed in a room-temature environment and a superconducting coil placed in an ultralow-temperature environment. The current leads includes a first current lead and a second current lead. The first curr...	05/30/2000
5884485	Power lead for electrically connecting a superconducting coil to a power supply A power lead for electrically connecting a superconducting coil with a power supply, comprising thermoelectric cooling means, said means including at least an N-type thermoelectric member and a P-type thermoelectric member, being electrically connected to...	03/23/1999
5802855	Power lead for electrically connecting a superconducting coil to a power supply A power lead for electrically connecting a superconducting coil with a power supply, comprising thermoelectric cooling means, said means including at least an N-type thermoelectric member and a P-type thermoelectric member, being electrically connected to...	09/08/1998
5747418	Superconducting thermoelectric generator An apparatus and method for producing electricity from heat. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical ene...	05/05/1998
5743095	Active magnetic refrigerants based on Gd-Si-Ge material and refrigeration apparatus and process Active magnetic regenerator and method using Gd5 (Six Ge1-x)4, where x is equal to or less than 0.5, as a magnetic refrigerant that exhibits a reversible ferromagnetic/antiferromagnetic or ferromagnetic-II/ferro...	04/28/1998
5357756	Bipolar pulse field for magnetic refrigeration A magnetic refrigeration apparatus includes first and second steady state magnets, each having a field of substantially equal strength and opposite polarity, first and second bodies made of magnetocaloric material disposed respectively in the influence of...	10/25/1994
5260266	High-TC superconducting lead assembly in a cryostat dual penetration for refrigerated superconductive magnets This invention relates to high-Tc superconducting lead assemblies in a cryostat dual penetration for refrigerated superconductive magnets. Such structures of this type, generally, provide electrically isolated current paths with minimal heat leak between ...	11/09/1993
5231834	Magnetic heating and cooling systems A magnetic heating and cooling system is disclosed. A magnetic fluid is pumped through at least a portion of the heating and cooling system. The fluid moves through the field of a superconducting or other type of magnet. When the fluid enters the magnetic...	08/03/1993
5209068	Static magnetic refrigerator A static magnetic refrigerator comprising a magnet generating a high-intensity magnetic field, a magnetic working material disposed in the high-intensity magnetic field, a magnetic shield disposed between the magnet and the magnetic working material, and ...	05/11/1993
5182914	Rotary dipole active magnetic regenerative refrigerator The rotary dipole active magnetic regenerative refrigerator (10) of the present invention comprises a stationary first regenerative magnetic bed (12) positioned within a stationary first inner dipole magnet (14), a stationary second regenerative magnetic ...	02/02/1993
5166777	Cooling apparatus for superconducting devices using Peltier effect cooling element A superconductive apparatus including a superconductive member to be cooled, a cooling element which exhibits Peltier effect upon supply of electric power thereto such that the superconductive member is thermally coupled with a cooling portion of the cool...	11/24/1992
5156003	Magnetic refrigerator A magnetic refrigerator comprising a magnet generating a high-intensity magnetic field, a tube-shaped superconducting magnetic shield, a magnetic working material and a reciprocating means for reciprocatively moving the superconducting magnetic shield or ...	10/20/1992
5153804	Hybrid current limiter having superconductor windings A hybrid current limiter comprising a first winding of non-superconducting conductive material having a large number of turns and electrically connected in series with a superconductoring coil of low self-inductance and placed in a cryostat, and a second ...	10/06/1992
5057490	Low-temperature thermoelectric refrigerating device using current-carrying superconducting mode/nonsuperconducting mode junctions A refrigerating device (34 or 46) is formed using a refrigerating unit (10) having a hot end (32) at which heat is transferred to a heat sink (22), a cold end (30) at which heat is transferred from a cooling load (28) to the unit (10), a first junction (1...	10/15/1991
5052183	Open cryogenic microwave test chamber A cryogenic microwave test chamber consists of a dry-sample receiving char which is partly immersed in liquid nitrogen. Waveguides from either end of the interior of the dry chamber are connected to and sealed to outgoing waveguides in regions immersed i...	10/01/1991
5040373	Condensing system and operating method A cryogenic condensing system is provided wherein the working fluid is paramagnetic and entropy reduction is accomplished by means of a magnetic field. Condensation is obtained by isentropically expanding partially compressed vapor into a thermally insula...	08/20/1991
4910626	Current limiter A current limiter comprising a cryostat provided with a first insulating feedthrough for an inlet conductor and a second insulating feedthrough for an outlet conductor, and a conductor running from one feedthrough to the other inside the tank, said conduc...	03/20/1990
4625519	Rotary magnetic refrigerator A rotary magnetic refrigerator comprising two rotors which are packed with portions of a working substance at equal spacing along the outer circumference thereof, and which are made of a material having a low thermal conductivity, openings that are formed...	12/02/1986
4599866	Magnetic refrigerator A magnetic refrigerator includes a plurality of working substances each of which, when it is within a magnetic field, generates heat and, when it is outside the magnetic field, absorbs the heat to permit a gas to be condensed on the outer surface of the w...	07/15/1986
4554790	Magnetic refrigerating apparatus A magnetic refrigerating apparatus comprises two pairs of superconductive coils for generating magnetic fields, a tank for receiving helium to be cooled, and a pair of heat absorbers each including a working substance adapted to generate heat when located...	11/26/1985
4532770	Magnetic refrigerator In a magnetic refrigerator comprising working substances for the magnetic refrigeration and a magnetic field generating device which magnetizes and demagnetizes these working substances, this magnetic refrigerator is provided with a plurality of supercond...	08/06/1985
4507927	Low-temperature magnetic refrigerator The disclosure is directed to a low temperature 4 to 20 K. refrigeration apparatus and method utilizing a ring of magnetic material moving through a magnetic field. Heat exchange is accomplished in and out of the magnetic field to appropriately utilize th...	04/02/1985
4464903	Magnetic refrigerator A magnetic refrigerator comprises a working material radiating heat when a magnetic field is applied thereto and absorbing heat when the magnetic field is removed therefrom, and magnetic coil which is movable for selectively applying or removing the magne...	08/14/1984
4457135	Magnetic refrigerating apparatus A magnetic refrigerating apparatus including a working material for performing magnetic refrigeration, and a magnetic field system capable of varying the distribution or intensity of a magnetic field impressed on the working material. When the working mat...	07/03/1984
4441325	Refrigerating or heat pumping process and apparatus The invention relates to a refrigerating or heat pumping process, as well as to an apparatus for performing this process. The apparatus comprises a toroidal cryostat, provided with first and second pipes for supplying fluid at temperature T1 from a ...	04/10/1984
4408463	Wheel-type magnetic refrigerator The disclosure is directed to a wheel-type magnetic refrigerator capable of cooling over a large temperature range. Ferromagnetic or paramagnetic porous materials are layered circumferentially according to their Curie temperature. The innermost layer has ...	10/11/1983
4392356	Magnetic heat pumping The method of the invention employs ferromagnetic or ferrimagnetic elements, preferably of rare-earth based material, for example gadolinium, and preferably employs a regenerator. The steps of the method comprise controlling the temperature and applied ma...	07/12/1983
4362023	Thermoelectric refrigerator having improved temperature stabilization means A control system for thermoelectric refrigerators is disclosed. The thermoelectric refrigerator includes at least one thermoelectric element that undergoes a first order change at a predetermined critical temperature. The element functions as a thermoelec...	12/07/1982
4332135	Active magnetic regenerator The disclosure is directed to an active magnetic regenerator apparatus and method. Brayton, Stirling, Ericsson, and Carnot cycles and the like may be utilized in an active magnetic regenerator to provide efficient refrigeration over relatively large tempe...	06/01/1982
4136525	Dielectic refrigerator using orientable defect dipoles This disclosure describes a dielectric refrigerator using orientable defect dipoles and operating between a high temperature, Th reservoir illustratively supplied by a Stirling cycle refrigerator (8° K ࣘ Th ࣘ 20° K) and a low t...	01/30/1979
4112699	Heat transfer system using thermally-operated, heat-conducting valves A heat transfer system, e.g., refrigeration system or heater, particularly aluable at cryogenic temperatures which comprises a serial arrangement, in abutting contact and connected to the material or device to be cooled or heated, of a thermal reservoir ma...	09/12/1978
4107935	High temperature refrigerator A high temperature magnetic refrigerator which uses a Stirling-like cycle in which rotating magnetic working material is heated in zero field and adiabatically magnetized, cooled in high field, then adiabatically demagnetized. During this cycle said worki...	08/22/1978
4033734	Continuous, noncyclic magnetic refrigerator and method A continuous, noncyclic magnetic refrigerator consisting of a liquid nitrogen cryostat having a motor-driven wheel with a pressed, porous rare earth compound as a rim that rotates through two thermally separated inner reservoirs of liquid helium, the firs...	07/05/1977

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Class 505/891 - Magnetic or electrical effect cooling