Patents by Inventor Takashi Inaguchi
Takashi Inaguchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5583472Abstract: An object of the present invention is to obtain a superconductive magnet, the size of which can be reduced by shortening the radial length of a magnetic device thereof and the refrigerating performance of which can be improved. A cylinder for fastening a refrigerator has an end facing an ambience of helium gas evaporating in a helium chamber and another end which is substantially horizontally fastened to a vacuum chamber. Further, the three-stage regenerative refrigerator is inserted and fastened to the cylinder for fastening the refrigerator. A heat insulator, such as a convection prevention tube, made of a hollow Teflon tube is wound around the outer surface of each stage of the cylinder of the three-stage regenerative refrigerator. The convection prevention tube is enclosed into a gap between the cylinder for fastening the refrigerator and the three-stage regenerative refrigerator without no undesirable gap so that heat convection of the helium gas is prevented.Type: GrantFiled: February 13, 1995Date of Patent: December 10, 1996Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuki Moritsu, Takahiro Matsumoto, Shuichi Nakagawa, Shuji Ando, Mitsuhiro Kishida, Hideto Yoshimura, Masashi Nagao, Takashi Inaguchi
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Patent number: 5471841Abstract: Disclosed is a low-temperature regenerative type refrigerator installed in a low temperature environment, in which a cooling water flow rate controller for adjusting the flow rate of cooling water automatically in accordance with the temperature of gas fed to an expansion unit from a compressor, is provided in a water cooling type cooler for cooling the compressor, to keep the temperature of the gas discharged from the compressor high to the extent of not deteriorating the function of a seal due to shrinkage or not causing convection or deflecting flow in a regenerator, whereby it is made possible to prevent the deterioration in the cooling efficiency of the regenerator which is caused by a lowering of the ambient temperature in the refrigerator installed place, and hence possible to prevent the deterioration of the refrigerating capacity as the entire refrigerator.Type: GrantFiled: March 8, 1995Date of Patent: December 5, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Takashi Inaguchi
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Patent number: 5447033Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: August 23, 1994Date of Patent: September 5, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi
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Patent number: 5417071Abstract: Disclosed is a low-temperature regenerative type refrigerator installed in a low temperature environment, in which a cooling water flow rate controller for adjusting the flow rate of cooling water automatically in accordance with the temperature of gas fed to an expansion unit from a compressor, is provided in a water cooling type cooler for cooling the compressor, to keep the temperature of the gas discharged from the compressor high to the extent of not deteriorating the function of a seal due to shrinkage or not causing convection or deflecting flow in a regenerator, whereby it is made possible to prevent the deterioration in the cooling efficiency of the regenerator which is caused by a lowering of the ambient temperature in the refrigerator installed place, and hence possible to prevent the deterioration of the refrigerating capacity as the entire refrigerator.Type: GrantFiled: June 29, 1994Date of Patent: May 23, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Takashi Inaguchi
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Patent number: 5398511Abstract: 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 volume changes with movement of a movable member, the movable member being disposed within a cylinder through a predetermined gap between its outer peripheral surface and the inner peripheral surface of the cylinder, and is allowed to expand therein, then is discharged again through the same route. In this regenerative refrigerator, the size, d, of the said gap is set in the range of 1/1000.ltoreq.d/D.ltoreq.1/100 relative to the inside diameter, D, of the cylinders or a gas convection preventing member is disposed in the said gap, or seals which are in contact with the inner peripheral surface of the cylinder are provided on the outer peripheral surfaces of both end portions of the movable member.Type: GrantFiled: February 18, 1993Date of Patent: March 21, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takashi Inaguchi, Masashi Nagao, Hideto Yoshimura, Kazuki Moritsu, Takahiro Matsumoto, Shuuichi Nakagawa
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Patent number: 5398512Abstract: 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 cold accumulator and disposed within a cylinder in which first and second closed chambers are defined above and below the displacement member, respectively. A compressed gas discharged from a compressor is introduced into the second closed chamber through the cold accumulator upon opening of a suction valve and undergoes expansion within the second closed chamber, the gas being then fed back to the compressor through the cold accumulator upon opening of an discharge valve, whereupon one cycle of refrigerating operation is completed.Type: GrantFiled: September 10, 1993Date of Patent: March 21, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takashi Inaguchi, Masashi Nagao, Hideto Yoshimura, Mitsuhiro Kishida, Kazuki Moritsu, Takahiro Matsumoto, Shuuichi Nakagawa, Shuji Ando
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Patent number: 5379600Abstract: A superconducting magnet which is capable of improving the refrigerating and the assembling characteristics and of composing in small size. A helium vessel 2 contains a cylindrical superconducting coil for cryogenically refrigerating it by liquid helium. A second and a first heat-shields 5 and 6 and a vacuum vessel 4 are coaxially provided so as to surround the helium vessel 2. Over the helium vessel 2, a L-letter shaped duct 50 is provided to be exposed to helium gas atmosphere being evaporated in the helium vessel 2. A refrigerator-mounting cylinder 51 has an end coupled to the L-letter shaped duct 50 through the bellows 52 and is mounted on an end surface of the vacuum vessel 4 substantially in parallel to the axial direction of the superconducting coil. A three-stage cold heat accumulation refrigerator 30 is inserted into and fixed to the refrigerator-mounting cylinder 51 for reliquefying the helium gas having been drawn into the L-letter shaped duct 50 by a third heat state 43.Type: GrantFiled: March 26, 1993Date of Patent: January 10, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuki Moritsu, Takahiro Matsumoto, Mitsuo Horikawa, Shuichi Nakagawa, Hideto Yoshimura, Masashi Nagao, Takashi Inaguchi
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Patent number: 5365743Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: November 5, 1993Date of Patent: November 22, 1994Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi
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Patent number: 5345770Abstract: Disclosed is a low-temperature regenerative type refrigerator installed in a low temperature environment, in which a cooling water flow rate controller for adjusting the flow rate of cooling water automatically in accordance with the temperature of gas fed to an expansion unit from a compressor, is provided in a water cooling type cooler for cooling the compressor, to keep the temperature of the gas discharged from the compressor high to the extent of not deteriorating the function of a seal due to shrinkage or not causing convection or deflecting flow in a regenerator, whereby it is made possible to prevent the deterioration in the cooling efficiency of the regenerator which is caused by a lowering of the ambient temperature in the refrigerator installed place, and hence possible to prevent the deterioration of the refrigerating capacity as the entire refrigerator.Type: GrantFiled: January 21, 1993Date of Patent: September 13, 1994Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Takashi Inaguchi
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Patent number: 5293749Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: May 29, 1992Date of Patent: March 15, 1994Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi
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Patent number: 5293752Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: May 29, 1992Date of Patent: March 15, 1994Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi
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Patent number: 5251456Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: May 29, 1992Date of Patent: October 12, 1993Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi
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Patent number: 5207981Abstract: The present invention provides heat reserving materials comprising alloys of Ru and at least one rare earth metal which are represented by the formula (I):(A.sub.1-x B.sub.x).sub.z Ru.sub.1-y C.sub.ywherein A represents one or two or more of Er, Ho and Dy; B represents one or two or more of the other rare earth metals; C represents one or two or more of Co, Ni, Al, Cu, Pd, Rh, Au, Ag, Cr, Mn, V and B; x is not less than 0 and not more than 0.5; y is not less than 0 and less than 1.0; and z is more than 1.1 and less than 5.0.When the heat reserving materials of the present invention are used in a cryogenic refrigerator, very low temperatures of not higher than 10 K. can be achieved. Specific heat properties of the materials can be varied as desired by adjusting the content ratio of the plural phases each of which has a different magnetic transition temperature.Type: GrantFiled: September 27, 1991Date of Patent: May 4, 1993Assignees: Mitsubishi Materials Corporation, Mitsubishi Denki Kabushiki KaishaInventors: Yasuhiro Hanaue, Etsuji Kimua, Takuo Takeshita, Kouichi Ishiyama, Masashi Nagao, Takashi Inaguchi, Hideto Yoshimura
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Patent number: 5154063Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: June 26, 1991Date of Patent: October 13, 1992Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi
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Patent number: 5144805Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: June 26, 1991Date of Patent: September 8, 1992Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi
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Patent number: 5144810Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: June 26, 1991Date of Patent: September 8, 1992Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi
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Patent number: 5092130Abstract: 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 or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed on an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.Type: GrantFiled: November 1, 1989Date of Patent: March 3, 1992Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masashi Nagao, Hideto Yoshimura, Takashi Inaguchi