Patents by Inventor Kenji Nagura

Kenji Nagura 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: 11079071
    Abstract: A hydrogen station operation method capable of adjusting pressure in a reservoir to the pressure suitable for liquid hydrogen replenishment while cutting hydrogen waste is for replenishing liquid hydrogen into the reservoir in a hydrogen station including: a gasification path partially gasifying liquid hydrogen out of the reservoir and returning it; and a gas delivery path delivering gasified hydrogen in the reservoir into a path between a vaporizer and a compressor or the vaporizer, when the remainder of liquid hydrogen in the reservoir becomes a first threshold or less, by reducing the liquid hydrogen amount flowing through the gasification path by a valve therein, reducing the gasification amount of liquid hydrogen in the reservoir, and increasing the hydrogen gas amount delivered through the gas delivery path from the reservoir by a valve therein, pressure in the reservoir is reduced, thereby performing operation where suction pressure of the compressor is reduced.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: August 3, 2021
    Assignee: Kobe Steel, Ltd.
    Inventors: Kenji Nagura, Tomohiro Ootsuka
  • Patent number: 11035520
    Abstract: A method for controlling a compression system that includes a compressor for compressing gas, a first on-off valve provided on a suction flow passage connected to a suction side of the compressor, a pressure reducing valve provided on a portion of the suction flow passage upstream of the first on-off valve, a second on-off valve provided on a discharge flow passage connected to a discharge side of the compressor, a bypass flow passage connecting the suction flow passage and the discharge flow passage to detour the compressor, and a bypass valve provided on the bypass flow passage, includes closing the first on-off valve while driving the compressor, opening the bypass valve simultaneously with or after the closing of the first on-off valve, closing the second on-off valve after the opening of the bypass valve, and continuing to drive the compressor after the closing of the second on-off valve.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: June 15, 2021
    Assignee: Kobe Steel, Ltd.
    Inventors: Koichiro Hashimoto, Masashi Takano, Takuro Uba, Takayuki Fukuda, Kenji Nagura
  • Patent number: 11028839
    Abstract: The present application includes a compressor having a cylinder forming a compression chamber in which gas is compressed, a housing having a peripheral wall forming an internal space in which the compressor is stored, and a supporting member situated above the compressor in the internal space. The peripheral wall includes an opening wall in which a carry-out port is formed through which the cylinder is carried out. The supporting member extends to guide movement of a first lifting device between a position above the compressor and a position above the carry-out port. The cylinder is hung from the first lifting device.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: June 8, 2021
    Assignee: Kobe Steel, Ltd.
    Inventors: Koichiro Hashimoto, Kenji Nagura, Takuya Washio, Ryosuke Mori, Daisuke Wada
  • Publication number: 20210164618
    Abstract: A method for controlling a compression system that includes a compressor for compressing gas, a first on-off valve provided on a suction flow passage connected to a suction side of the compressor, a pressure reducing valve provided on a portion of the suction flow passage upstream of the first on-off valve, a second on-off valve provided on a discharge flow passage connected to a discharge side of the compressor, a bypass flow passage connecting the suction flow passage and the discharge flow passage to detour the compressor, and a bypass valve provided on the bypass flow passage, includes closing the first on-off valve while driving the compressor, opening the bypass valve simultaneously with or after the closing of the first on-off valve, closing the second on-off valve after the opening of the bypass valve, and continuing to drive the compressor after the closing of the second on-off valve.
    Type: Application
    Filed: October 14, 2020
    Publication date: June 3, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Koichiro HASHIMOTO, Masashi TAKANO, Takuro UBA, Takayuki FUKUDA, Kenji NAGURA
  • Patent number: 11015589
    Abstract: A gas supplying apparatus includes a compressor, a housing having an exhaust port, and an exhaust duct. The housing has a circumferential wall and a top wall. The circumferential wall has an access section. The exhaust port is provided on at least one of the circumferential wall and the top wall at a location higher than the access section. The exhaust duct includes a discharge port for discharging the air, exhausted from the exhaust port, to the outside. The discharge port is opened upward or opened downward in an area overlapping the top wall in an up-and-down direction.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: May 25, 2021
    Assignee: Kobe Steel, Ltd.
    Inventors: Takuya Washio, Koichiro Hashimoto, Daisuke Wada, Kenji Nagura, Akitoshi Fujisawa
  • Patent number: 10883662
    Abstract: A gas supply device includes a first compressor that compresses hydrogen gas, an accumulator disposed downstream of the first compressor and supplying the hydrogen gas to a dispenser that fills the hydrogen gas in a vehicle, and a gas flow passage that connects the first compressor, the accumulator, and the dispenser, and a control device. The gas flow passage includes a lead-in line for leading the hydrogen gas into the accumulator, a lead-out line for leading out the hydrogen gas from the accumulator, a lead-in side valve, and a lead-out side valve. The control device is capable of simultaneously bringing the lead-in side valve and the lead-out side valve into an open state.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: January 5, 2021
    Assignee: KOBE STEEL, LTD.
    Inventors: Kenji Nagura, Hitoshi Takagi, Takuro Uba
  • Patent number: 10801671
    Abstract: A gas supply system (2) includes a compressor unit (21), an accumulator unit (23), a pre-cooling system (24) and a housing (4). In the gas supply system (2), the compressor unit (21) is vertically arranged and the pre-cooling system (24) is arranged above the accumulator unit (23) in the housing (4). The compressor unit (21) and the accumulator unit (23) are covered by one rectangular parallelepiped housing (4).
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: October 13, 2020
    Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Kenji Nagura, Tetsuya Kakiuchi, Takashi Okuno, Koji Noishiki, Akitoshi Fujisawa, Shinichi Miura
  • Patent number: 10746162
    Abstract: The present application discloses a compressor including a crank shaft, a first reciprocation converter, a first cylinder body, a first pressurizing portion, a second reciprocation converter, which is connected to the crank shaft with a phase different by 180 degrees from the first reciprocation converter, a second cylinder body, a second pressurizing portion, and a connecting portion configured to interconnect the compression chambers. The compression chambers are arranged so that a timing at which the gas is discharged from a specific compression chamber among the compression chambers becomes the same as a timing at which the discharged gas is suctioned into another compression chamber at a higher side by one stage than the specific compression chamber.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: August 18, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Kenji Nagura, Takayuki Fukuda, Ryosuke Yamasaki, Tomohiro Ootsuka
  • Patent number: 10711946
    Abstract: A combustible gas supply unit includes a high pressure gas facility for handling combustible gas which is compressed and a housing provided with a high pressure gas handling area containing the high pressure gas facility. The housing has a portion that is disposed in a side close to a boundary between premises of a hydrogen station and an outer region of the premises and constitutes the high pressure gas handling area, the portion being substantially composed of a partitioning wall member that resists an impact of an explosion of combustible gas.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: July 14, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Takayuki Fukuda, Kenji Nagura, Koichiro Hashimoto, Daisuke Wada, Takuya Washio
  • Patent number: 10704284
    Abstract: A combustible gas supply unit is for supplying compressed combustible gas to a dispenser. The combustible gas supply unit includes a high pressure gas facility for handling compressed combustible gas, a base plate having the high pressure gas facility installed thereon and a barrier supported by the base plate to surround at least a part of an outer periphery of the high pressure gas facility. A barrier is shaped to surround at least a part of an outer periphery of the high pressure gas facility and includes a part to be supported by a base plate having the high pressure gas facility installed thereon.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: July 7, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Shota Harada, Akitoshi Fujisawa, Kenji Nagura, Daisuke Wada, Takayuki Fukuda
  • Publication number: 20200182408
    Abstract: A hydrogen station operation method capable of adjusting pressure in a reservoir to the pressure suitable for liquid hydrogen replenishment while cutting hydrogen waste is for replenishing liquid hydrogen into the reservoir in a hydrogen station including: a gasification path partially gasifying liquid hydrogen out of the reservoir and returning it; and a gas delivery path delivering gasified hydrogen in the reservoir into a path between a vaporizer and a compressor or the vaporizer, when the remainder of liquid hydrogen in the reservoir becomes a first threshold or less, by reducing the liquid hydrogen amount flowing through the gasification path by a valve therein, reducing the gasification amount of liquid hydrogen in the reservoir, and increasing the hydrogen gas amount delivered through the gas delivery path from the reservoir by a valve therein, pressure in the reservoir is reduced, thereby performing operation where suction pressure of the compressor is reduced.
    Type: Application
    Filed: September 27, 2019
    Publication date: June 11, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kenji NAGURA, Tomohiro OOTSUKA
  • Patent number: 10677235
    Abstract: This compression device is provided with a reciprocating compressor which compresses a gas, and a heat exchanger which cools gas compressed by the compressor. The heat exchanger is provided with a cooling unit for cooling the gas and with a connection unit which abuts against the outside surface of the compressor and has a gas inlet passage to allow gas discharged from the compression chamber of the compressor to flow into the cooling unit.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: June 9, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Kenji Nagura, Hitoshi Takagi, Takuro Uba, Toshio Hirai
  • Patent number: 10655784
    Abstract: A gas supply device includes a storage container that accumulates liquefied gas, a vaporizer for vaporizing liquefied gas derived from the storage container, a compression device that compresses gas vaporized from the liquefied gas in the vaporizer, a pressure accumulator that accumulates gas compressed in the compression device, and a supply path linked to a dispenser from the pressure accumulator.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: May 19, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Akitoshi Fujisawa, Kenji Nagura
  • Patent number: 10634283
    Abstract: A gas supply system—includes a compressor unit, an accumulator unit, a pre-cooling system and a housing. In the gas supply system, the compressor unit is vertically arranged and the pre-cooling system is arranged above the accumulator unit in the housing. The compressor unit and the accumulator unit are covered by one rectangular parallelepiped housing.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: April 28, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Kenji Nagura, Tetsuya Kakiuchi, Takashi Okuno, Koji Noishiki, Akitoshi Fujisawa, Shinichi Miura
  • Patent number: 10563820
    Abstract: A gas supply device includes a first compressor that compresses hydrogen gas, an accumulator disposed downstream of the first compressor and supplying the hydrogen gas to a dispenser that fills the hydrogen gas in a vehicle, and a gas flow passage that connects the first compressor, the accumulator, and the dispenser, and a control device. The gas flow passage includes a lead-in line for leading the hydrogen gas into the accumulator, a lead-out line for leading out the hydrogen gas from the accumulator, a lead-in side valve, and a lead-out side valve. The control device is capable of simultaneously bringing the lead-in side valve and the lead-out side valve into an open state.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: February 18, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Kenji Nagura, Hitoshi Takagi, Takuro Uba
  • Patent number: 10550968
    Abstract: A joint unit includes a first joint member, a second joint member, and a gasket. The first joint member has a female screw portion. The second joint member has a second pipe portion and a second fastener. The second pipe portion has a male screw portion. The second fastener has a second fastener body and a second collar having an annular shape. The second fastener body has an external screw portion that is a male screw. The second collar has at an inner circumferential portion thereof an internal screw portion that is a female screw. The external screw portion is engaged with the female screw portion, and the male screw portion is engaged with the internal screw portion. In the joint unit, the second fastener body and the first joint member are fastened so that the second collar presses the second pipe portion toward the gasket.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: February 4, 2020
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Kenji Nagura, Hitoshi Takagi
  • Patent number: 10533708
    Abstract: The present invention is to properly manage life of an accumulator and extend the life of the accumulator. A gas supply system includes a control section, an acquiring section, a classifying section, and a judging section. The acquiring section acquires stress amplitude of accumulators from a pressure difference between first pressure on the gas storage side and second pressure on the gas lead-out side. The classifying section classifies the stress amplitude into a plurality of groups. The judging section divides the calculated acquirement number ni of the stress amplitude for each of the groups by the predetermined breaking cycle number Ni, and determines a fatigue degree ?ni/Ni. In a case where this value becomes a predetermined threshold value or more, the judging section judges that the accumulator comes to the end of the life.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: January 14, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Takashi Okuno, Kenji Nagura
  • Publication number: 20190368426
    Abstract: A gas supply system includes a first tank, a first path into which a first gas generated by vaporization of a first low-temperature liquefied gas flows, a gas boosting mechanism being disposed in the first path, a second path that is a path configured to extract the first low-temperature liquefied gas from the first tank, a pump and a vaporization mechanism being disposed in the second path and a reliquefaction path that is a path configured to liquefy at least part of the first gas extracted from an upstream side of the gas boosting mechanism in the first path and to cause the liquefied first gas to flow into an upstream side of the pump in the second path, a cooling heat exchanger configured to cool the first gas by a second low-temperature liquefied gas or a second gas being disposed in the reliquefaction path.
    Type: Application
    Filed: May 20, 2019
    Publication date: December 5, 2019
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Naofumi KANEI, Kenji NAGURA
  • Publication number: 20190353306
    Abstract: The present application includes a compressor having a cylinder forming a compression chamber in which gas is compressed, a housing having a peripheral wall forming an internal space in which the compressor is stored, and a supporting member situated above the compressor in the internal space. The peripheral wall includes an opening wall in which a carry-out port is formed through which the cylinder is carried out. The supporting member extends to guide movement of a first lifting device between a position above the compressor and a position above the carry-out port. The cylinder is hung from the first lifting device.
    Type: Application
    Filed: May 6, 2019
    Publication date: November 21, 2019
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Koichiro HASHIMOTO, Kenji NAGURA, Takuya WASHIO, Ryosuke MORI, Daisuke WADA
  • Patent number: 10480715
    Abstract: A gas supply device for supplying a hydrogen gas to a dispenser of a hydrogen station includes: a refrigerant flow path through which a refrigerant for cooling the gas before being discharged from the dispenser flows; a refrigerator that can cool the refrigerant; a cooling device that can cool the refrigerant by latent heat when liquid hydrogen changes to the hydrogen gas; and a control unit that performs control to activate the refrigerator while stopping the cooling device when a condition set in advance is satisfied after performing control to activate the cooling device in activation of the hydrogen station.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: November 19, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Akitoshi Fujisawa, Kenji Nagura