Patents by Inventor Yasue Sato

Yasue Sato 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).

  • Patent number: 10068742
    Abstract: The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: September 4, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Yamazaki, Yasue Sato, Kazuyuki Ueda
  • Publication number: 20180158641
    Abstract: The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.
    Type: Application
    Filed: December 28, 2017
    Publication date: June 7, 2018
    Inventors: Koji Yamazaki, Yasue Sato, Kazuyuki Ueda
  • Patent number: 9887063
    Abstract: The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: February 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Yamazaki, Yasue Sato, Kazuyuki Ueda
  • Patent number: 9653252
    Abstract: Provided is an X-ray generating tube with improved withstand voltage property by a simple structure, the X-ray generating tube including a cathode connected to one opening of an insulating tube and an anode connected to the other opening, in which a resistive film having a lower sheet resistance value than that of the insulating tube is disposed on an outer periphery of the insulating tube, and the cathode and the anode are electrically connected to each other via the resistive film.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: May 16, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihiro Yanagisawa, Yasue Sato, Noritaka Ukiyo, Kazuhiro Sando
  • Patent number: 9570264
    Abstract: Provided is an X-ray generator which includes: an electron path 8; a target 9c disposed on a substrate 9a, in which electrons having passed through the electron path 8 are made to emit at the target 9c and to generate an X-ray, wherein: the target 9c is disposed at the central area of the substrate 9a; at least a part of a peripheral area of the substrate 9a which is not covered with the target 9c has higher transmittance than that of the central area of the substrate 9a covered with the target 9c, with respect to the X-ray generated when electrons having reflected from the target enter an inner wall of the electron path. X-ray generation efficiency may be improved by effectively using electrons reflected off the target 9c.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: February 14, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Ogura, Yasue Sato
  • Patent number: 9524846
    Abstract: In a target structure according to the present invention, a target is provided on a central area of an insulating substrate, and a first conductive member for supplying a voltage to the target is provided on a peripheral area of the insulating substrate which is exclusive of an area overlapping the target and is not covered by the target, so that the first conductive member is in contact with and electrically connected to the peripheral portion of the target. Consequently, it is possible to easily form a voltage supply line to the target without preventing diffusion of a heat generated in the target to the substrate and while suppressing emission of an unnecessary X-ray.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: December 20, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasue Sato, Takao Ogura, Kazuyuki Ueda, Ichiro Nomura
  • Patent number: 9401259
    Abstract: Provided is a radiation generating tube in which an insulating tube is prevented from being damaged by heat generation of a target or an electron emitting source during drive. Extending portions extending along an outer periphery of an insulating tube are provided to a cathode and an anode, respectively, and the insulating tube is joined to the extending portions to enhance the strength of joint portions. At the same time, the insulating tube can be deformed easily by setting a tube wall thickness of the insulating tube at a central portion in a longitudinal direction to be smaller than a tube wall thickness of an opening end, and thus the concentration of thermal stress on the joint portions caused by an increase in temperature of the cathode and the anode is alleviated.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: July 26, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noritaka Ukiyo, Yasue Sato, Yoshihiro Yanagisawa, Kazuhiro Sando
  • Patent number: 9373478
    Abstract: There is provided a radiation generating apparatus having a simple structure and capable of shielding unnecessary radiation, cooling a target, reducing the size and weight of the apparatus, and achieving higher reliability, and a radiation imaging apparatus having the same. A transmission type radiation tube is held inside a holding container filled with a cooling medium. The transmission type radiation tube includes an envelope having an aperture, an electron source arranged inside the envelope so as to face the aperture of the envelope, a target unit for generating a radiation responsive to an irradiation with an electron emitted from the electron source, and a shield member for shielding a part of the radiation emitted from the target unit. The cooling medium contacts at least a part of the shield member.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: June 21, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Miki Tamura, Kazuyuki Ueda, Takao Ogura, Yasue Sato, Ichiro Nomura, Shuji Aoki
  • Publication number: 20160086761
    Abstract: Provided is an X-ray generating tube with improved withstand voltage property by a simple structure, the X-ray generating tube including a cathode connected to one opening of an insulating tube and an anode connected to the other opening, in which a resistive film having a lower sheet resistance value than that of the insulating tube is disposed on an outer periphery of the insulating tube, and the cathode and the anode are electrically connected to each other via the resistive film.
    Type: Application
    Filed: December 3, 2015
    Publication date: March 24, 2016
    Inventors: Yoshihiro Yanagisawa, Yasue Sato, Noritaka Ukiyo, Kazuhiro Sando
  • Patent number: 9281158
    Abstract: An X-ray emitting target including a diamond substrate, a first layer disposed on the diamond substrate and including a first metal, and a second layer disposed on the first layer and including a second metal whose atomic number is 42 or more and which has a thermal conductivity higher than that of the first metal. Carbide of the first metal is present at a boundary between the diamond substrate and the first layer. The target is prevented from overheating, so that output variation due to rising temperature is suppressed. Thus it is possible to emit stable and high output X-rays.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: March 8, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Ogura, Yasue Sato, Nobuhiro Ito
  • Patent number: 9281155
    Abstract: A radiation generating apparatus has a radiation generating tube held in a holding container 12 and a cooling medium between the holding container and the radiation generating tube. The radiation generating tube includes an envelope with an aperture, an electron emitting source arranged in the envelope, a target arranged facing the source, for generating radiation responsive to irradiation with an electron beam emitted from the source, and a tubular shield for holding the target by an inner wall thereof and shielding part of the radiation emitted from the target. The shield is arranged to protrude outward of the envelope so that the target is positioned on an outer side of the aperture, and the cooling medium contacts at least a part of the shield.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: March 8, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuyuki Ueda, Miki Tamura, Yasue Sato, Takao Ogura, Ichiro Nomura, Shuji Aoki
  • Patent number: 9251995
    Abstract: A radiation generating tube 1 includes: an electron emitting source 3; a target 9 spaced from the electron emitting source 3, for generating radiation 11 responsive to irradiation with an electron beam from the electron emitting source 3; and a tubular shielding member 10 having an electron passing hole 8, wherein the electron passing hole 8 has an electron incident aperture at one end thereof and has a target supporting surface 9b supporting the target 9 at the other end thereof, wherein the target supporting surface 9b is connected through a brazing filler 14 to a periphery of a surface of the target at a side on which the electron is incident, and an opening size of the other end of the electron passing hole 8 is larger than an opening size of the electron incident aperture at the one end thereof.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: February 2, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takao Ogura, Kazuyuki Ueda, Yasue Sato, Ichiro Nomura
  • Patent number: 9230774
    Abstract: Provided is an X-ray generating tube with improved withstand voltage property by a simple structure, the X-ray generating tube including a cathode connected to one opening of an insulating tube and an anode connected to the other opening, in which a resistive film having a lower sheet resistance value than that of the insulating tube is disposed on an outer periphery of the insulating tube, and the cathode and the anode are electrically connected to each other via the resistive film.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: January 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihiro Yanagisawa, Yasue Sato, Noritaka Ukiyo, Kazuhiro Sando
  • Patent number: 9208987
    Abstract: A radioactive ray generating apparatus includes a second shielding member, a target, and a first shielding member, which are sequentially disposed from an electron emission source side. A shortest distance from a maximum radiation intensity portion of the target to the first shielding member is shorter than a shortest distance from the maximum radiation intensity portion of the target to the second shielding member.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: December 8, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuya Miyazaki, Takao Ogura, Kazuyuki Ueda, Yasue Sato, Ichiro Nomura, Shuji Aoki, Miki Tamura
  • Patent number: 9070531
    Abstract: Provided is an X-ray generator comprising an X-ray tube including a cylindrical body; an electron source in the body; a target at an end of the X-ray tube facing the electron source, the target generating X-rays by irradiation with electrons; a container in which the X-ray tube is arranged; insulating liquid filled between the X-ray tube and the container; and a holding member holding the body of the X-ray tube in the container, with a channel for the insulating liquid around the X-ray tube. The distance between the holding member and the end face at the end of the body in the direction in which the electron source and the target face is twice or more as large as the minimum width of the channel that is in contact with the outer surface of the X-ray tube at the end face side with respect to the holding member. This allows heat in the target to be quickly radiated, thus allowing X-rays to be generated stably for a long time.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: June 30, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuyuki Ueda, Miki Tamura, Yoshihiro Yanagisawa, Yasue Sato, Koji Yamazaki, Takao Ogura, Shuji Aoki, Ichiro Nomura
  • Patent number: 9029795
    Abstract: A radiation generating tube includes an electron emitting source configured to emit an electron beam; a target configured to generate radiation when the target is irradiated with the electron beam; a rear shield body having a tube-shaped electron passage with openings thereof at each end of the passage, and being located at the side of the electron emitting source with respect to the target, a first opening of the passage facing the electron emitting source and being separated from the electron emitting source, a second opening of the passage facing the target; and a brazing material joining the rear shield body with a peripheral edge of the target, at a position separated from the second opening. A closed space isolated from the electron passage is provided between the target and the rear shield body.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Sando, Noritaka Ukiyo, Yasue Sato, Yoshihiro Yanagisawa
  • Publication number: 20140369469
    Abstract: In an X-ray generation apparatus of transmission type including an electron passage surrounded by and formed in an electron passage forming member, and generating an X-ray by colliding electrons having passed through the electron passage against a target, wherein the electron passage includes a secondary X-ray generation portion that generates an X-ray with collision of electrons reflected by the target against the secondary X-ray generation portion, the secondary X-ray generation portion and the target are arranged such that the X-ray generated with direct collision of the electrons against the target and the X-ray generated with the collision of the electrons reflected by the target against the secondary X-ray generation portion are both radiated to an outside, and an atomic number of a material of the electron passage forming member is larger than that of the target. X-ray generation efficiency is increased by effectively utilizing the electrons reflected by the target.
    Type: Application
    Filed: August 29, 2012
    Publication date: December 18, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takao Ogura, Miki Tamura, Yasue Sato, Tamayo Hiroki
  • Publication number: 20140369467
    Abstract: The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.
    Type: Application
    Filed: October 25, 2012
    Publication date: December 18, 2014
    Inventors: Koji Yamazaki, Yasue Sato, Kazuyuki Ueda
  • Publication number: 20140369470
    Abstract: Provided is a radiation generating tube in which an insulating tube is prevented from being damaged by heat generation of a target or an electron emitting source during drive. Extending portions extending along an outer periphery of an insulating tube are provided to a cathode and an anode, respectively, and the insulating tube is joined to the extending portions to enhance the strength of joint portions. At the same time, the insulating tube can be deformed easily by setting a tube wall thickness of the insulating tube at a central portion in a longitudinal direction to be smaller than a tube wall thickness of an opening end, and thus the concentration of thermal stress on the joint portions caused by an increase in temperature of the cathode and the anode is alleviated.
    Type: Application
    Filed: June 2, 2014
    Publication date: December 18, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Noritaka Ukiyo, Yasue Sato, Yoshihiro Yanagisawa, Kazuhiro Sando
  • Publication number: 20140362974
    Abstract: Provided is an X-ray generating tube with improved withstand voltage property by a simple structure, the X-ray generating tube including a cathode connected to one opening of an insulating tube and an anode connected to the other opening, in which a resistive film having a lower sheet resistance value than that of the insulating tube is disposed on an outer periphery of the insulating tube, and the cathode and the anode are electrically connected to each other via the resistive film.
    Type: Application
    Filed: April 22, 2014
    Publication date: December 11, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yoshihiro Yanagisawa, Yasue Sato, Noritaka Ukiyo, Kazuhiro Sando