Patents by Inventor Sadatsugu NAGATA

Sadatsugu NAGATA 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).

  • Publication number: 20220170554
    Abstract: In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.
    Type: Application
    Filed: February 4, 2022
    Publication date: June 2, 2022
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mitsuyoshi ITAHARA, Kazuhiro YONESHIGE, Hiroshi KAWAZOE, Makoto FUKUI, Sadatsugu NAGATA
  • Publication number: 20220170553
    Abstract: In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.
    Type: Application
    Filed: February 4, 2022
    Publication date: June 2, 2022
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mitsuyoshi ITAHARA, Kazuhiro YONESHIGE, Hiroshi KAWAZOE, Makoto FUKUI, Sadatsugu NAGATA
  • Patent number: 11274750
    Abstract: In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: March 15, 2022
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mitsuyoshi Itahara, Kazuhiro Yoneshige, Hiroshi Kawazoe, Makoto Fukui, Sadatsugu Nagata
  • Publication number: 20200173562
    Abstract: In a double eccentric valve, a valve seat or valve body includes a rubber seal part in which a seat surface or seal surface is formed. An interference between the valve seat and the valve body is made minimum at a position of a rotary-shaft-directional end of the valve body in the radial direction of the valve body which is parallel to an extending direction of the axis of a rotary shaft.
    Type: Application
    Filed: June 1, 2018
    Publication date: June 4, 2020
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mitsuyoshi ITAHARA, Kazuhiro YONESHIGE, Hiroshi KAWAZOE, Makoto FUKUI, Sadatsugu NAGATA
  • Publication number: 20180038317
    Abstract: In a fuel injection apparatus, a movable core includes a large-diameter portion and a small-diameter portion, and a fixed core, includes a large-diameter recessed portion and a small-diameter recessed portion in which the large-diameter portion and the small-diameter portion are respectively slidable. While a coil is energized, a first magnetic circuit is formed allowing a magnetic flux to flow between a large-diameter-portion corner of a large-diameter portion and a large-diameter recessed-portion corner of a large-diameter recessed portion, and a second magnetic circuit is formed allowing a magnetic flux to flow between a small-diameter-portion corner of a small-diameter portion and a small-diameter recessed-portion corner of a small-diameter recessed portion.
    Type: Application
    Filed: July 10, 2017
    Publication date: February 8, 2018
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu NAGATA
  • Patent number: 9876241
    Abstract: A fuel supply unit including injectors to adjust a flow rate and a pressure of fuel gas and an outflow passage of which the fuel gas injected from the injectors will flow out, wherein the fuel supply unit further includes: a branch passage that branches off from the outflow passage and communicates with an injection port of the injector; a specified injector defined as N?1 or less pieces of the injectors when N pieces of the injectors are provided, in which N denotes an integer more than 1; and a pressure reduction member provided in the branch passage that communicates with an injection port of the specified injector, only the specified injector is operated during idling, and the pressure reduction member is configured to decompress injection pressure of the fuel gas which will be injected from the specified injector.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: January 23, 2018
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu Nagata
  • Patent number: 9831508
    Abstract: A fuel injection apparatus includes a valve element provided with a flow passage allowing a fuel to flow therethrough, a valve seat which the valve element will contact with or separate from, and a casing accommodating therein the valve element and the valve seat. During valve opening in which the valve element is separated from the valve seat, the fuel flowing through the flow passage is discharged through a gap between the valve element and the valve seat. A direction in which the valve seat is placed relative to the valve element is the same as a direction of the fuel flowing in the flow passage. The fuel injection apparatus further includes a discharge-side flow passage in which the fuel to be discharged during valve opening is allowed flow. The discharge-side flow passage is formed outside an outer peripheral portion of the valve seat.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: November 28, 2017
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu Nagata
  • Patent number: 9784228
    Abstract: A fuel supply apparatus includes a valve seat, a valve element, and a sealing member formed of a circular-disc or annular shape placed in the valve element to face the valve seat. The valve element includes an outside facing surface corresponding to a surface facing the valve seat and formed more outside than the sealing member in a radial direction thereof. The sealing member includes an annular protrusion protruding toward the valve seat more than the outside facing surface, and a flat portion formed between the outside facing surface and an distal end of the protrusion on a side toward the valve seat in a central axis direction of the sealing member so that the flat portion will contact with the valve seat during valve closing.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: October 10, 2017
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu Nagata
  • Patent number: 9692065
    Abstract: A hydrogen supply unit is provided with an inflow block having an inflow passage for hydrogen gas, an outflow block having an outflow passage for hydrogen gas, injectors for adjusting a flow rate and a pressure of hydrogen gas, a secondary pressure sensor for detecting hydrogen gas pressure in the inflow passage, and a tertiary pressure sensor for detecting hydrogen gas pressure in the outflow passage. An inlet side of each injector is connected to the inflow passage and an outlet side of each injector is connected to the outflow passage. The hydrogen gas allowed to flow in the inflow passage is injected by each injector into the outflow passage and thereby reduced in pressure. Each of the injectors, secondary pressure sensor, and tertiary pressure sensor are held between the inflow block and outflow block.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: June 27, 2017
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu Nagata
  • Patent number: 9570765
    Abstract: A hydrogen supply unit is configured to inject hydrogen gas having flowed in an inflow passage into an outflow passage by use of an injector to reduce the pressure of the hydrogen gas. The hydrogen supply unit includes a primary-side relief valve for releasing the hydrogen gas from inside to outside of the inflow passage when the internal pressure of the inflow passage rises to a first predetermined value, and a secondary-side relief valve for releasing the hydrogen gas from inside to outside of the outflow passage when the internal pressure of the outflow passage rises to a second predetermined value. The primary-side relief valve and the secondary-side relief valve are held between the inflow block and the outflow block.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: February 14, 2017
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu Nagata
  • Publication number: 20170018788
    Abstract: Each injector is placed and held between an inflow block and an outflow block. An inlet pipe of each injector is connected with an inlet hole of the inflow block via a sealing member, and an outlet pipe of each injector is connected with an outlet hole of the outflow block via a sealing member. An inflow pipe to introduce fuel gas is connected with an inflow port of the inflow block via a sealing member, and an outflow pipe to allow the fuel gas to flow out is connected with an outflow port of the outflow block via a sealing member. The inflow block has inner peripheral surfaces defining the inflow port and the inlet hole and each being formed as a smooth sealing surface finished by one of pressurizing and pressing, the corresponding sealing member being held in contact with a part of the inner peripheral surface.
    Type: Application
    Filed: July 5, 2016
    Publication date: January 19, 2017
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu NAGATA
  • Publication number: 20160363105
    Abstract: A fuel supply apparatus includes a valve seat, a valve element, and a sealing member formed of a circular-disc or annular shape placed in the valve element to face the valve seat. The valve element includes an outside facing surface corresponding to a surface facing the valve seat and formed more outside than the sealing member in a radial direction thereof. The sealing member includes an annular protrusion protruding toward the valve seat more than the outside facing surface, and a flat portion formed between the outside facing surface and an distal end of the protrusion on a side toward the valve seat in a central axis direction of the sealing member so that the flat portion will contact with the valve seat during valve closing.
    Type: Application
    Filed: May 20, 2016
    Publication date: December 15, 2016
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu NAGATA
  • Publication number: 20160305354
    Abstract: A hydrogen supply system includes a hydrogen supply passage connected to a FC stack, a plurality of fuel supply units arranged in parallel with each other in the hydrogen supply passage to supply hydrogen gas to the FC stack through the hydrogen supply passage, and a controller to control operations of the fuel supply units. The fuel supply units include an electrically-operated small-flow regulating valve adjustable to any opening degree between full closed and full open and one or more injectors configured to allow fuel gas to flow at a larger flow rate than a flow rate allowed by the small-flow regulating valve in full open.
    Type: Application
    Filed: March 29, 2016
    Publication date: October 20, 2016
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu NAGATA
  • Publication number: 20160230987
    Abstract: A fuel injection apparatus for adjusting a flow rate of gas fuel and injecting and supplying the gas fuel through a discharge hole includes an open portion having a larger diameter than the discharge hole and being communicated with a downstream end of the discharge hole, and a separation suppressing member placed in the open portion. The separation suppressing member is configured to suppress generation of separation of the gas fuel flow when the gas fuel flows out from the discharge hole into the open portion.
    Type: Application
    Filed: January 22, 2016
    Publication date: August 11, 2016
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu NAGATA
  • Publication number: 20160177904
    Abstract: A fuel supply unit including injectors to adjust a flow rate and a pressure of fuel gas and an outflow passage of which the fuel gas injected from the injectors will flow out, wherein the fuel supply unit further includes: a branch passage that branches off from the outflow passage and communicates with an injection port of the injector; a specified injector defined as N?1 or less pieces of the injectors when N pieces of the injectors are provided, in which N denotes an integer more than 1; and a pressure reduction member provided in the branch passage that communicates with an injection port of the specified injector, only the specified injector is operated during idling, and the pressure reduction member is configured to decompress injection pressure of the fuel gas which will be injected from the specified injector.
    Type: Application
    Filed: November 30, 2015
    Publication date: June 23, 2016
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu NAGATA
  • Publication number: 20160181635
    Abstract: A fuel supply unit includes side-feed injectors each having a side surface formed with a communication port through which fuel is supplied in each injector, and a block body provided with an inflow passage in which the fuel flows, an outflow passage through which the fuel injected from the injectors flows out, fitting holes which are connected to the inflow passage and the outflow passage and in which the respective injectors are fitted. The fitting holes and the injectors are arranged in series in a central axis direction of the inflow passage. The inflow passage is connected to the fitting holes from a radial direction thereof.
    Type: Application
    Filed: October 29, 2015
    Publication date: June 23, 2016
    Inventor: Sadatsugu NAGATA
  • Publication number: 20160161005
    Abstract: A fuel injection apparatus includes a valve element provided with a flow passage allowing a fuel to flow therethrough, a valve seat which the valve element will contact with or separate from, and a casing accommodating therein the valve element and the valve seat. During valve opening in which the valve element is separated from the valve seat, the fuel flowing through the flow passage is discharged through a gap between the valve element and the valve seat. A direction in which the valve seat is placed relative to the valve element is the same as a direction of the fuel flowing in the flow passage. The fuel injection apparatus further includes a discharge-side flow passage in which the fuel to be discharged during valve opening is allowed flow. The discharge-side flow passage is formed outside an outer peripheral portion of the valve seat.
    Type: Application
    Filed: October 23, 2015
    Publication date: June 9, 2016
    Inventor: Sadatsugu NAGATA
  • Publication number: 20160133961
    Abstract: A hydrogen supply unit is configured to inject hydrogen gas having flowed in an inflow passage into an outflow passage by use of an injector to reduce the pressure of the hydrogen gas. The hydrogen supply unit includes a primary-side relief valve for releasing the hydrogen gas from inside to outside of the inflow passage when the internal pressure of the inflow passage rises to a first predetermined value, and a secondary-side relief valve for releasing the hydrogen gas from inside to outside of the outflow passage when the internal pressure of the outflow passage rises to a second predetermined value. The primary-side relief valve and the secondary-side relief valve are held between the inflow block and the outflow block.
    Type: Application
    Filed: October 8, 2015
    Publication date: May 12, 2016
    Inventor: Sadatsugu NAGATA
  • Publication number: 20160006050
    Abstract: A hydrogen supply unit is provided with an inflow block having an inflow passage for hydrogen gas, an outflow block having an outflow passage for hydrogen gas, injectors for adjusting a flow rate and a pressure of hydrogen gas, a secondary pressure sensor for detecting hydrogen gas pressure in the inflow passage, and a tertiary pressure sensor for detecting hydrogen gas pressure in the outflow passage. An inlet side of each injector is connected to the inflow passage and an outlet side of each injector is connected to the outflow passage. The hydrogen gas allowed to flow in the inflow passage is injected by each injector into the outflow passage and thereby reduced in pressure. Each of the injectors, secondary pressure sensor, and tertiary pressure sensor are held between the inflow block and outflow block.
    Type: Application
    Filed: June 19, 2015
    Publication date: January 7, 2016
    Inventor: Sadatsugu NAGATA