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: 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
  • Patent number: 10473268
    Abstract: A gas supply apparatus includes; a compressor unit including a compression section compressing hydrogen gas and storing pressure accumulators with the compressed hydrogen gas and a drive portion including an electric motor as drive source and driving the compression section; and a control unit controlling the electric motor. The electric motor has output characteristics where rated torque can be maintained against rotational speed changes in a standard rotation region, rotation region at or below standard speed, and output torque decreases from the rated torque as electric motor rotational speed increases in an overspeed region, rotation region above the standard speed. The control unit performs, in at least part of a storage process where the compression section stores the pressure accumulators with the hydrogen gas until set pressure is reached, overspeed operation control for allowing driving of the electric motor in the overspeed region.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: November 12, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Takashi Okuno, Koichiro Hashimoto, Kenji Nagura
  • Patent number: 10400954
    Abstract: A gas delivery system including: a feeder for feeding a gas to a tank; a pressure storage container unit which has a plurality of pressure storage containers, and sends out the gas to the feeder; a gas supply unit; and a controller. The controller implements a storing operation that a specified pressure storage among the plurality of pressure storage containers is supplied with the gas until a pressure of the specified pressure storage container reaches a reference pressure or greater, after finish of a delivery of the gas to one tank carrier, and a sending operation that the gas is sent out from another pressure storage container except the specified pressure storage container to the feeder, and then sent out from the specified pressure storage container to the feeder on a receipt of a shift indication from the feeder, at a delivery of the gas to a subsequent tank carrier.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: September 3, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Takashi Okuno, Kenji Nagura, Hitoshi Takagi, Takuro Uba
  • Patent number: 10364810
    Abstract: A reciprocating compressor is provided with a compression section which compresses gas, and a crank section which has a crankshaft and drives the compression section. The compression section is provided with a wall body portion which includes a cylinder and constitutes a wall body of the compression section, a cylinder head attached to the cylinder, a piston which reciprocates within the cylinder, a piston rod which couples the crankshaft and the piston, and at least one sealing member fixed to the wall body portion and disposed in the circumference of the piston rod. The wall body portion has a first boundary wall which forms the boundary with the crank section in the crank section side with respect to the at least one sealing member and acts as a division surface when the crank section and the compression section are separated.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: July 30, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Kenji Nagura, Katsuhiro Seyama, Satoshi Tezuka
  • Patent number: 10317011
    Abstract: [Object] To enable a gas supply system to be easily transported and to increase a degree of freedom when the gas supply system is installed. [Solution] A hydrogen station includes: a filling facility for filling a tank-mounted device with a gas; and a gas supply system for supplying the gas to the filling facility. The gas supply system includes: a compressor for compressing the gas; a compressor accommodating body for accommodating the compressor; a refrigerator for cooling the gas flowed into the filling facility or the gas just before being flowed into the filling facility, the refrigerator including an evaporation part, an expansion part, and a compression part; and a cooler accommodating body for accommodating the evaporation part, the expansion part, and the compression part. The compressor accommodating body and the cooler accommodating body are detachable from each other.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: June 11, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Takashi Okuno, Hitoshi Takagi, Kenji Nagura, Daisuke Wada, Takuro Uba, Akitoshi Fujisawa
  • Publication number: 20190154022
    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: Application
    Filed: October 24, 2018
    Publication date: May 23, 2019
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Kenji NAGURA, Takayuki FUKUDA, Ryosuke YAMASAKI, Tomohiro OOTSUKA
  • Patent number: 10288062
    Abstract: A gas compressor of the present invention includes a reciprocating member, an accommodation portion, and a sealing portion, and the accommodation portion includes a compression chamber that compresses a gas and a non-compression chamber that is separated from the compression chamber by the reciprocating member and the sealing portion. Further, since the compression chamber includes a suction line that suctions a hydrogen gas, a discharge line that discharges a compressed gas, a connection line that is connected to the accommodation portion and is used so that at least a part of a gas flows therethrough when a gas passing through the sealing portion from the compression chamber exists, a flowmeter that is provided in the connection line, and a determination unit that determines whether a flow amount measured by the flowmeter is equal to or larger than a predetermined threshold value, it is possible to easily determine the abrasion state of the sealing portion.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: May 14, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Kenji Nagura, Hitoshi Takagi
  • Publication number: 20190128265
    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: Application
    Filed: October 16, 2018
    Publication date: May 2, 2019
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Takuya WASHIO, Koichiro HASHIMOTO, Daisuke WADA, Kenji NAGURA, Akitoshi FUJISAWA