Patents by Inventor Keitaro Ishikawa

Keitaro Ishikawa 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: 10604279
    Abstract: To provide a propellant tank such as a fuel tank and an oxidant tank for a spacecraft, the propellant tank discharging propellant such as liquid hydrogen and liquid oxygen accumulated therein toward a rocket engine by pressurizing an inside thereof by operating gas. The propellant tank includes a tank body that accumulates therein the propellant in a liquid state, and a holding container that is provided inside the tank body and disposed with a predetermined gap from an inner wall of the tank body, so that the propellant in a liquid state can be held therein, when the inside of the tank body is in a microgravity state or a zero-gravity state.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: March 31, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keitaro Ishikawa, Taichi Aoyama, Kiyoshi Kinefuchi, Koichi Okita, Wataru Sarae
  • Patent number: 10414265
    Abstract: A connection member for coolant passages is provided. The connection member includes: a first end portion configured to be connected to the first opening via a shaft seal member; a second end portion configured to be connected to the second opening via a face seal member; a communication portion providing communication between the first end portion and the second end portion; a first fastening portion provided at a position in one direction such that a distance between the first fastening portion and the second end portion is larger than a distance between the first fastening portion and the first end portion; and a second fastening portion provided around the second end portion, and configured to be fastened to the case.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: September 17, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keitaro Ishikawa
  • Patent number: 10046665
    Abstract: A coolant passage connection structure includes: a first coolant passage attached to a case which houses a cooler and has a second opening, and extending from the cooler; a second coolant passage that communicates with the second opening; a first connection member connected to the first coolant passage, and having a first opening; a first face seal member; and a second connection member connected to the first opening and the second opening via the first face seal member. The second opening is provided in the case so as to be positioned below the first connection member in a vertical direction. The first connection member is positioned above the first face seal member in the vertical direction and includes a tapered portion that includes an inclined surface inclined further away from a surface of the case toward a lower side in the vertical direction.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: August 14, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keitaro Ishikawa
  • Publication number: 20180072436
    Abstract: To provide a propellant tank such as a fuel tank and an oxidant tank for a spacecraft, the propellant tank discharging propellant such as liquid hydrogen and liquid oxygen accumulated therein toward a rocket engine by pressurizing an inside thereof by operating gas. The propellant tank includes a tank body that accumulates therein the propellant in a liquid state, and a holding container that is provided inside the tank body and disposed with a predetermined gap from an inner wall of the tank body, so that the propellant in a liquid state can be held therein, when the inside of the tank body is in a microgravity state or a zero-gravity state.
    Type: Application
    Filed: March 18, 2016
    Publication date: March 15, 2018
    Inventors: Keitaro ISHIKAWA, Taichi AOYAMA, Kiyoshi KINEFUCHI, Koichi OKITA, Wataru SARAE
  • Publication number: 20170067589
    Abstract: A connection member for coolant passages is provided. The connection member includes: a first end portion configured to be connected to the first opening via a shaft seal member; a second end portion configured to be connected to the second opening via a face seal member; a communication portion providing communication between the first end portion and the second end portion; a first fastening portion provided at a position in one direction such that a distance between the first fastening portion and the second end portion is larger than a distance between the first fastening portion and the first end portion; and a second fastening portion provided around the second end portion, and configured to be fastened to the case.
    Type: Application
    Filed: August 31, 2016
    Publication date: March 9, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keitaro ISHIKAWA
  • Publication number: 20170066344
    Abstract: A coolant passage connection structure includes: a first coolant passage attached to a case which houses a cooler and has a second opening, and extending from the cooler; a second coolant passage that communicates with the second opening; a first connection member connected to the first coolant passage, and having a first opening; a first face seal member; and a second connection member connected to the first opening and the second opening via the first face seal member. The second opening is provided in the case so as to be positioned below the first connection member in a vertical direction. The first connection member is positioned above the first face seal member in the vertical direction and includes a tapered portion that includes an inclined surface inclined further away from a surface of the case toward a lower side in the vertical direction.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 9, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keitaro ISHIKAWA
  • Patent number: 9587769
    Abstract: A connecting structure includes a housing, a cooler, an inner refrigerant pipe, an outer refrigerant pipe, and a joint pipe. The joint pipe is attached to a through hole of the housing. The inner refrigerant pipe is fitted to the joint pipe from a housing inner side. The outer refrigerant pipe is fitted to the joint pipe from a housing outer side. A tip of the inner refrigerant pipe and a tip of the outer refrigerant pipe define a gap inside the joint pipe. An end surface of a flange or a rib of the outer refrigerant pipe in a refrigerant-pipe axis direction abuts with an end surface of a flange or a rib of the joint pipe in the refrigerant-pipe axis direction.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: March 7, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keitaro Ishikawa
  • Patent number: 9565792
    Abstract: Two opening through which a refrigerant runs are connected by a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is connected to a first opening by a planar seal. Another end of the first connecting pipe is connected to one end of a second connecting pipe by a shaft seal. Another end of the second connecting pipe is connected to a second opening by a planar seal. An axial direction of a shaft seal is perpendicular to a plane that includes the first opening.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: February 7, 2017
    Assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Keitaro Ishikawa, Akio Kitami, Takashi Hamatani, Kunihiro Iwata, Satoshi Iguchi
  • Patent number: 9476654
    Abstract: An aircraft/spacecraft fluid cooling system and an aircraft/spacecraft fluid cooling method in which a fluid in a pipe installed in aircraft or spacecraft can be cooled efficiently so that the amount of fluid required for cooling the fluid can be reduced. A fluid cooling system includes a feed line that feeds a fluid from a storage tank to a pump, and a cooling section that expands a propellant having traveled through the pump, feeds the propellant to the outer periphery of the feed line so as to cool the propellant in the feed line, and discharges the expanded propellant outside.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: October 25, 2016
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Osamu Kitayama, Keitaro Ishikawa, Yorichika Mihara, Taichi Aoyama, Shinji Nishimura
  • Publication number: 20150152987
    Abstract: A connecting structure includes a housing, a cooler, an inner refrigerant pipe, an outer refrigerant pipe, and a joint pipe. The joint pipe is attached to a through hole of the housing. The inner refrigerant pipe is fitted to the joint pipe from a housing inner side. The outer refrigerant pipe is fitted to the joint pipe from a housing outer side. A tip of the inner refrigerant pipe and a tip of the outer refrigerant pipe define a gap inside the joint pipe. An end surface of a flange or a rib of the outer refrigerant pipe in a refrigerant-pipe axis direction abuts with an end surface of a flange or a rib of the joint pipe in the refrigerant-pipe axis direction.
    Type: Application
    Filed: December 2, 2014
    Publication date: June 4, 2015
    Inventor: Keitaro Ishikawa
  • Publication number: 20140146588
    Abstract: In order to provide a capacitance element housing unit with which the effect of suppressing heat transfer between capacitance elements can be increased more suitably, a capacitance element housing unit (10) is equipped with: a common package (104), which integrally houses a filter-use capacitance element (14) and a smoothing-use capacitance element (18), and which is provided with a slit part (105) at the location between the filter-use capacitance element (14) and the smoothing-use capacitance element (18) where the temperature is high; a case (102) having cooling flow paths (108) for cooling a DC/DC converter (16) and an inverter (20); and an anchoring part (106) that anchors the common package (104) and the case (102) in the slit part (105).
    Type: Application
    Filed: June 27, 2011
    Publication date: May 29, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keitaro Ishikawa
  • Publication number: 20140140118
    Abstract: Two opening through which a refrigerant runs are connected by a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is connected to a first opening by a planar seal. Another end of the first connecting pipe is connected to one end of a second connecting pipe by a shaft seal. Another end of the second connecting pipe is connected to a second opening by a planar seal. An axial direction of a shaft seal is perpendicular to a plane that includes the first opening.
    Type: Application
    Filed: November 18, 2013
    Publication date: May 22, 2014
    Applicants: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keitaro ISHIKAWA, Akio Kitami, Takashi Hamatani, Kunihiro Iwata, Satoshi Iguchi
  • Publication number: 20140020872
    Abstract: An aircraft/spacecraft fluid cooling system and an aircraft/spacecraft fluid cooling method in which a fluid in a pipe installed in aircraft or spacecraft can be cooled efficiently so that the amount of fluid required for cooling the fluid can be reduced. A fluid cooling system includes a feed line that feeds a fluid from a storage tank to a pump, and a cooling section that expands a propellant having traveled through the pump, feeds the propellant to the outer periphery of the feed line so as to cool the propellant in the feed line, and discharges the expanded propellant outside.
    Type: Application
    Filed: March 21, 2012
    Publication date: January 23, 2014
    Inventors: Osamu Kitayama, Keitaro Ishikawa, Yorichika Mihara, Taichi Aoyama, Shinji Nishimura
  • Publication number: 20130292091
    Abstract: A cooler comprising a coolant space (R) which is in contact with a heat dissipator; an inflow-side coolant reservoir (Ri) which is in communication with one end of the coolant space (R) via an inflow-side narrowed portion (Rsi); and an outflow-side coolant reservoir (Ro) which is in communication with another end of the coolant space (R) via an outflow-side narrowed portion (Rso). By forming fins (22, 23) or a guide (24, 25) to stand upright in an area located near a downstream side end portion of the inflow-side coolant reservoir (Ri), the flow channel cross-sectional area is reduced and regulated, and the flow velocity of a coolant in this area is increased.
    Type: Application
    Filed: January 12, 2011
    Publication date: November 7, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keitaro Ishikawa
  • Patent number: 5507618
    Abstract: This invention provides a package-type oil-cooled air compressor in which the housing is divided into two chambers, in one of which, a first chamber, are located the compressor unit, motor used to drive the compressor unit, air intake filter and intake regulator valve connected to the compressor unit, and in the other of which, a second chamber, are located the oil cooler and sirocco fan. An air duct connects the two chambers. Air outlets are formed in each of the chambers and an air inlet is formed in the second chamber. Air is introduced through the rotation of the sirocco fan into the second chamber via the air inlet. A portion of this air is directed into the first chamber via the air duct where a part is used to supply the compressor unit and the remainder flows over the components located in the first chamber to cool them and leaves via the outlet formed in the first chamber.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: April 16, 1996
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Kazuo Kubo, Koji Akashi, Keitaro Ishikawa