Patents by Inventor Hiroyuki Koba

Hiroyuki Koba 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: 10999918
    Abstract: An X-ray tube, including: an envelope (11) that holds inside thereof at a predetermined pressure; a filament (12) for emitting electrons and a focus electrode (13) provided in the envelope: and a target (15) for generating X-ray provided in the envelope facing to the filament (12) and the focus electrode (13), wherein the envelope (11) has an envelope body (11a) and an X-ray window portion (16) having a higher X-rays transmissivity and a higher electric conductivity than the envelope body (11a), when the X-ray window portion (16) or the anode (14) is set to a lower electric potential than both of an electric potential of the anode (14) or the X-ray window portion (16) and an electric potential of the filament (12) and the focus electrode (13), detection of at least one of an ion current (Ii) or an electron current (Ie) through the X-ray window portion (16) or the anode (14) is possible.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: May 4, 2021
    Assignees: ANRITSU INFIVIS CO., LTD., YAMAGUCHI UNIVERSITY
    Inventors: Hiroyuki Koba, Jyunichi Moriya, Yoshifumi Takahashi, Hiroki Kurisu
  • Publication number: 20210092823
    Abstract: An X-ray tube, including: an envelope (11) that holds inside thereof at a predetermined pressure; a filament (12) for emitting electrons and a focus electrode (13) provided in the envelope: and a target (15) for generating X-ray provided in the envelope facing to the filament (12) and the focus electrode (13), wherein the envelope (11) has an envelope body (11a) and an X-ray window portion (16) having a higher X-rays transmissivity and a higher electric conductivity than the envelope body (11a), when the X-ray window portion (16) or the anode (14) is set to a lower electric potential than both of an electric potential of the anode (14) or the X-ray window portion (16) and an electric potential of the filament (12) and the focus electrode (13), detection of at least one of an ion current (Ii) or an electron current (Ie) through the X-ray window portion (16) or the anode (14) is possible.
    Type: Application
    Filed: December 11, 2018
    Publication date: March 25, 2021
    Inventors: Hiroyuki KOBA, Jyunichi MORIYA, Yoshifumi TAKAHASHI, Hiroki KURISU
  • Patent number: 6462466
    Abstract: In a color cathode ray tube, inner lead pin segments which extend inside the neck of a funnel constituting an vacuum envelope, outer lead pin segments which are led out of the neck and interconnecting wires which respectively connect both lead pin segments together are provided in a stem for sealing the end portion of the neck. The inner lead pin segments are arranged along a first circumference and are supported by respective projections protruding from the stem. The outer lead pin segments are arranged along a second circumference having a larger diameter than that of the first circumference. The inner lead pin segments are connected to the respective outer lead pin segments by the respective interconnecting wires which are bent in the stem and the respective projections.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: October 8, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shigeru Sugawara, Hiroyuki Koba, Fumitaka Hoshino, Hidenori Takata, Masatoshi Ichikawa
  • Patent number: 5676355
    Abstract: A suspension system includes a shock absorber, a coil spring, a tubular dust cover, and an insulator. The shock absorber is provided with a first seat and a second seat at the opposite ends. The insulator is disposed between the first seat and the coil spring, and includes a body for holding the coil spring, and a contact projecting from the body in a centripetal direction and having a portion being brought into contact with one of the opposite ends of the dust cover. The insulator forms a space between the first seat and an outer portion with respect to the portion of the contact. Thus, the insulator reduces the wear of the first seat resulting from the contact with the dust cover, inhibits the first seat from corroding, and keeps the strength of the first seat from decreasing.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: October 14, 1997
    Assignees: Tokai Rubber Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Naoki Hayashi, Yoshikazu Tsukamoto, Hiroyuki Koba
  • Patent number: 5669728
    Abstract: A bracket made from a metal sheet for connecting a strut of a suspension and a wheel carrier has at least two attaching portions attached to the wheel carrier. A holding portion holds the strut at a predetermined position, and at least one welding portion substantially exactly surrounds the predetermined position of the strut and is welded to the strut.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: September 23, 1997
    Assignee: Toyota Jidosh Kabushiki Kaisha
    Inventor: Hiroyuki Koba
  • Patent number: 4975618
    Abstract: In a color picture tube apparatus, a deflection unit is provided around a color picture tube and a leakage magnetic is generated from the deflection unit. A metal cover made of aluminum, which covers an electrical power source is located in a space to which leakage magnetic field is reached and a first opposition magnetic field is generated from the metal cover due to the leakage magnetic field which produces an eddy current in the metal cover. A metal plate made of a conductive and non-magnetic material is so located between the deflection unit and the metal cover as to be substantially perpendicular to the metal cover. Thus, a second opposition magnetic field is so generated from the metal plate due to the leakage magnetic field as to substantially cancel the first opposition magnetic field.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: December 4, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroyuki Koba, Hisakazu Okamoto
  • Patent number: 4818919
    Abstract: A color picture tube apparatus comprises a color picture tube including an envelope having a phosphor screen excited by a plurality of electron beams, and deflection means generating horizontal deflection field and barrel type vertical deflection field for the beams, including non-linear magnetic field correction means generating an additional pin-cushion type magnetic field in the vertical field to have preferably convergence characteristics such that vertical direction coma errors can be appropriately corrected throughout every portion of the vertical axis on the screen, whereby high-definition color images can be obtained thereon.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: April 4, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenichi Kobayashi, Hiroyuki Koba, Naoto Nakamura