Patents by Inventor Ryuya Ando
Ryuya Ando 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: 7714574Abstract: A superconducting magnet includes: a superconducting coil for generating a static magnetic field; a refrigerant container for containing the superconducting coil and a refrigerant; a vacuum container for holding the refrigerant container in a vacuum state; a radiation shield between the refrigerant container and the vacuum container; a refrigerator for re-liquidfying the refrigerant; and a dynamic magnetic field shield. The refrigerator includes: first and second regenerative refrigerants. The dynamic magnetic field shield is an electric good conductor and arranged around the first regenerative refrigerant along a motion axis of the first regenerative refrigerant, wherein a direction of the motion axis is aligned with a direction of a magnetic force line of the static magnetic field at the first regenerative refrigerant.Type: GrantFiled: November 19, 2007Date of Patent: May 11, 2010Assignee: Hitachi, Ltd.Inventors: Ryuya Ando, Mitsushi Abe, Tsutomu Yamamoto, Tomoo Chiba
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Publication number: 20100045293Abstract: The magnetic field homogeneity adjusting device (20) is characterized by comprising a magnetic field distribution measuring unit (21) for measuring the magnetic field distribution in the magnetic field space, a temperature variation calculating unit (22) for calculating the temperature variation of the ferromagnetic bodies needed to improve the homogeneity of the magnetic field space based on the measured magnetic field distribution, and a temperature control unit (12) for setting a temperature control value of the ferromagnetic bodies according to the calculated temperature variation.Type: ApplicationFiled: April 10, 2008Publication date: February 25, 2010Applicant: Hitachi Medical CorporationInventors: Ryuya Ando, Kenji Sakakibara
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Publication number: 20090040664Abstract: The active shield superconducting electromagnet apparatus includes: a main switching circuit in which first and second main coils, first and second shield coils, and a first superconducting persistent current switch are connected in series; a sub switching circuit in which a bypass circuit, in which a superconducting fault current limiter and a second superconducting persistent current switch are connected in series, are connected to a series circuit of the first main coil and the second main coil in parallel; a first closed circuit in which at least one of the first main coil and the first shield coil, and a first quench protection circuit are connected in series; and a second closed circuit in which one of the second main coil and the second shield coil, and a second quench protection circuit are connected in series.Type: ApplicationFiled: August 6, 2008Publication date: February 12, 2009Inventors: Yoshiya Higuchi, Mitsushi Abe, Ryuya Ando, Tsutomu Yamamoto, Takuro Honda
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Patent number: 7436179Abstract: A magnet device has main coils in a pair positioned facing each other to form a static magnetic field space in between and external magnetic flux shielding coils placed coaxially to the main coils. The external magnetic flux shielding coils have a first coil group having a small coefficient of coil coupling and a second coil group having a coefficient of coil coupling greater than that of the first coil group. The first coil group is connected in series to the second coil group. External magnetic flux entering the magnetic field imaging space formed by main coils in a pair positioned facing each other is effectively warded off.Type: GrantFiled: August 31, 2006Date of Patent: October 14, 2008Assignee: Hitachi, Ltd.Inventors: Ryuya Ando, Mitsushi Abe, Takeshi Nakayama, Tsutomu Yamamoto
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Publication number: 20080180100Abstract: A superconducting magnet includes: a superconducting coil for generating a static magnetic field; a refrigerant container for containing the superconducting coil and a refrigerant; a vacuum container for holding the refrigerant container in a vacuum state; a radiation shield between the refrigerant container and the vacuum container; a refrigerator for re-liquidfying the refrigerant; and a dynamic magnetic field shield. The refrigerator includes: first and second regenerative refrigerants. The dynamic magnetic field shield is an electric good conductor and arranged around the first regenerative refrigerant along a motion axis of the first regenerative refrigerant, wherein a direction of the motion axis is aligned with a direction of a magnetic force line of the static magnetic field at the first regenerative refrigerant.Type: ApplicationFiled: November 19, 2007Publication date: July 31, 2008Inventors: Ryuya Ando, Mitsushi Abe, Tsutomu Yamamoto, Tomoo Chiba
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Patent number: 7323963Abstract: An object of the present invention is to provide a MRI superconductive magnet enables sharp images representing patients' health states to be produced. [Means for Achieving the Object] A MRI superconductive magnet having a superconductive coil, a liquid vessel of liquid helium used to cool the superconductive coil, a heat shield to accommodate the liquid vessel therein, a vacuum chamber to accommodate the heat shield therein, a load supporting body for supporting the superconductive coil from the vacuum chamber and securing the superconductive coil, a second cold part of a multi-stage refrigerator for cooling a heat exchanger to condense evaporated helium gas, and a first cold part of the multi-stage refrigerator for cooling the heat shield, wherein a magnetic shield is provided from the first cold part of the multi-stage refrigerator to an outer periphery of the second cold part of the multi-stage refrigerator.Type: GrantFiled: June 29, 2006Date of Patent: January 29, 2008Assignee: Hitachi, Ltd.Inventors: Takeo Nemoto, Ryuya Ando, Hiroyuki Watanabe
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Patent number: 7245128Abstract: A magnetic resonance imaging apparatus and the magnet apparatus thereof comprise plural pairs of magnetic field generation sources, arranged face to face with each other, for forming a magnetic field space 3; and magnetic field homogeneity adjusting apparatuses 17 and 18 for providing homogeneity adjustment of the magnetic field formed in the magnetic field space 3. The magnetic field homogeneity adjusting apparatuses 17 and 18 contain a plurality of tapped holes 24 for installing a magnetic field homogeneity adjusting member 26 of smaller volume in a plate-formed tray made of a non-magnetic substance; and a plurality of mounts 25 for installing the magnetic field homogeneity adjusting member 27 of greater volume, these mounts being formed over the area containing a plurality of through-holes for permitting installation of a magnetic field homogeneity adjusting member 26 of smaller volume, whereby major magnetic field adjusting work can be performed independently of minor magnetic field adjusting work.Type: GrantFiled: June 30, 2005Date of Patent: July 17, 2007Assignee: Hitachi, Ltd.Inventors: Ryuya Ando, Mitsushi Abe, Hiroyuki Watanabe
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Publication number: 20070057667Abstract: A magnet device has main coils in a pair positioned facing each other to form a static magnetic field space in between and external magnetic flux shielding coils placed coaxially to the main coils. The external magnetic flux shielding coils have a first coil group having a small coefficient of coil coupling and a second coil group having a coefficient of coil coupling greater than that of the first coil group. The first coil group is connected in series to the second coil group. External magnetic flux entering the magnetic field imaging space formed by main coils in a pair positioned facing each other is effectively warded off.Type: ApplicationFiled: August 31, 2006Publication date: March 15, 2007Inventors: Ryuya Ando, Mitsushi Abe, Takeshi Nakayama, Tsutomu Yamamoto
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Publication number: 20070001792Abstract: [Object]An object of the present invention is to provide a MRI superconductive magnet enables sharp images representing patients' health states to be produced. [Means for Achieving the Object]A MRI superconductive magnet having a superconductive coil, a liquid vessel of liquid helium used to cool the superconductive coil, a heat shield to accommodate the liquid vessel therein, a vacuum chamber to accommodate the heat shield therein, a load supporting body for supporting the superconductive coil from the vacuum chamber and securing the superconductive coil, a second cold part of a multi-stage refrigerator for cooling a heat exchanger to condense evaporated helium gas, and a first cold part of the multi-stage refrigerator for cooling the heat shield, wherein a magnetic shield is provided from the first cold part of the multi-stage refrigerator to an outer periphery of the second cold part of the multi-stage refrigerator.Type: ApplicationFiled: June 29, 2006Publication date: January 4, 2007Inventors: Takeo Nemoto, Ryuya Ando, Hiroyuki Watanabe
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Publication number: 20060001427Abstract: A magnetic resonance imaging apparatus and the magnet apparatus thereof comprise plural pairs of magnetic field generation sources, arranged face to face with each other, for forming a magnetic field space 3; and magnetic field homogeneity adjusting apparatuses 17 and 18 for providing homogeneity adjustment of the magnetic field formed in the magnetic field space 3. The magnetic field homogeneity adjusting apparatuses 17 and 18 contain a plurality of tapped holes 24 for installing a magnetic field homogeneity adjusting member 26 of smaller volume in a plate-formed tray made of a non-magnetic substance; and a plurality of mounts 25 for installing the magnetic field homogeneity adjusting member 27 of greater volume, these mounts being formed over the area containing a plurality of through-holes for permitting installation of a magnetic field homogeneity adjusting member 26 of smaller volume, whereby major magnetic field adjusting work can be performed independently of minor magnetic field adjusting work.Type: ApplicationFiled: June 30, 2005Publication date: January 5, 2006Applicant: Hitachi Ltd.Inventors: Ryuya Ando, Mitsushi Abe, Hiroyuki Watanabe
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Patent number: 6908050Abstract: A press-machined fuel induction pipe 40, a hollow tubular type of fixed core 1 with a flange at its upper end, and a nozzle holder 18 that was press-machined into a slender tubular shape and has an orifice plate equipped with a valve seat at the lower end of the nozzle holder, are connected by welding. The upper inner surface of nozzle holder 18 and the outer surface of fixed core 1 are welded after being press-fit. A movable core 14 and a valve body 16 are connected to the welded assembly via a point 15 having a spring function. On the outer surface of nozzle holder 18 is provided an electromagnetic coil 2, the outside of which is provided with a tubular yoke 4 whose upper end is connected by welding to the flange 1a of fixed core 1 and whose lower end is press-fit on the outer surface of nozzle holder 18.Type: GrantFiled: January 7, 2004Date of Patent: June 21, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsushi Sekine, Kiyotaka Ogura, Ryuya Ando, Makoto Yamakado, Noriyuki Maekawa
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Publication number: 20040135014Abstract: A press-machined fuel induction pipe 40, a hollow tubular type of fixed core 1 with a flange at its upper end, and a nozzle holder 18 that was press-machined into a slender tubular shape and has an orifice plate equipped with a valve seat at the lower end of the nozzle holder, are connected by welding. The upper inner surface of nozzle holder 18 and the outer surface of fixed core 1 are welded after being press-fit. A movable core 14 and a valve body 16 are connected to the welded assembly via a point 15 having a spring function. On the outer surface of nozzle holder 18 is provided an electromagnetic coil 2, the outside of which is provided with a tubular yoke 4 whose upper end is connected by welding to the flange 1a of fixed core 1 and whose lower end is press-fit on the outer surface of nozzle holder 18.Type: ApplicationFiled: January 7, 2004Publication date: July 15, 2004Applicants: HITACHI, LTD., HITACHI CAR ENGINEERING CO., LTD.Inventors: Atsushi Sekine, Kiyotaka Ogura, Ryuya Ando, Makoto Yamakado, Noriyuki Maekawa
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Patent number: 6695233Abstract: A press-machined fuel induction pipe 40, a hollow tubular type of fixed core 1 with a flange at its upper end, and a nozzle holder 18 that was press-machined into a slender tubular shape and has an orifice plate equipped with a valve seat at the lower end of the nozzle holder, are connected by welding. The upper inner surface of nozzle holder 18 and the outer surface of fixed core 1 are welded after being press-fit. A movable core 14 and a valve body 16 are connected to the welded assembly via a point 15 having a spring function. On the outer surface of nozzle holder 18 is provided an electromagnetic coil 2, the outside of which is provided with a tubular yoke 4 whose upper end is connected by welding to the flange 1a of fixed core 1 and whose lower end is press-fit on the outer surface of nozzle holder 18.Type: GrantFiled: September 4, 2001Date of Patent: February 24, 2004Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., LtdInventors: Atsushi Sekine, Kiyotaka Ogura, Ryuya Ando, Makoto Yamakado, Noriyuki Maekawa
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Publication number: 20020043575Abstract: A press-machined fuel induction pipe 40, a hollow tubular type of fixed core 1 with a flange at its upper end, and a nozzle holder 18 that was press-machined into a slender tubular shape and has an orifice plate equipped with a valve seat at the lower end of the nozzle holder, are connected by welding. The upper inner surface of nozzle holder 18 and the outer surface of fixed core 1 are welded after being press-fit. A movable core 14 and a valve body 16 are connected to the welded assembly via a point 15 having a spring function. On the outer surface of nozzle holder 18 is provided an electromagnetic coil 2, the outside of which is provided with a tubular yoke 4 whose upper end is connected by welding to the flange 1a of fixed core 1 and whose lower end is press-fit on the outer surface of nozzle holder 18.Type: ApplicationFiled: September 4, 2001Publication date: April 18, 2002Applicant: Hitachi Ltd.Inventors: Atsushi Sekine, Kiyotaka Ogura, Ryuya Ando, Makoto Yamakado, Noriyuki Maekawa
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Publication number: 20020010526Abstract: The present invention provides a method for providing a three dimensional model based upon an instruction of a client including storing a three dimensional object image data provided by a client and extracting a three dimensional model image data from the object image data and producing the three dimensional model with the model image data and providing the client with the three dimensional model.Type: ApplicationFiled: April 23, 2001Publication date: January 24, 2002Inventors: Ryuya Ando, Kikuo Umegaki, Takashi Okazaki, Tarou Takagi