Patents by Inventor Yoshiyuki Yokoyama

Yoshiyuki Yokoyama 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: 20210078542
    Abstract: A snow removing device includes a heater that is disposed in a moving body that has a light including a cover and a cleaner that ejects a washer solution toward an outer surface of the cover. The cover is exposed to an outside of the moving body, covers a light source, and allows light emitted from the light source to pass therethrough. The snow removing device further includes a control unit that controls the heater to heat the cover first, and then controls the cleaner to eject a washer solution toward the outer surface of the cover.
    Type: Application
    Filed: November 23, 2020
    Publication date: March 18, 2021
    Inventors: Koji OTA, Kotaro FUKUDA, Yoshiyuki YOKOYAMA
  • Patent number: 10935051
    Abstract: An ejector includes a nozzle, a body including a refrigerant suction port and a pressure increasing portion, a passage forming member inserted into the nozzle, and an actuation device moving the passage forming member. A nozzle passage includes a smallest passage cross-sectional area portion, a convergent portion, and a divergent portion. The passage forming member includes a tip portion which changes the passage cross-sectional area at the smallest passage cross-sectional area portion when the actuation device moves the passage forming member. A positive displacement amount is defined as an amount of a displacement of the passage forming member when the passage forming member is moved so as to increase the passage cross-sectional area at the smallest passage cross-sectional area portion. The tip portion has a shape in which an increase rate of the smallest passage cross-sectional area portion is increased according to an increase of the positive displacement amount.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: March 2, 2021
    Assignee: DENSO CORPORATION
    Inventors: Yoshiyuki Yokoyama, Haruyuki Nishijima, Yoshiaki Takano
  • Patent number: 10767905
    Abstract: An ejector includes a body including an inflow space into which a refrigerant flows, a passage formation member disposed inside the body and having a conical shape, and a nozzle passage having an annular cross section functioning as a nozzle and a diffuser passage having an annular cross section functioning as a pressurizing portion between an inner wall surface of the body and a conical lateral surface of the passage formation member. A drive mechanism that displaces the passage formation member along a center axis is coupled to an upstream actuating bar which extends from the passage formation member toward the inflow space and is slidably supported by the body. A largest outer diameter portion of an annular member forming a wall surface of the nozzle passage provides a throat portion functioning as an edge for enlarging a passage cross-sectional area to cause a separation vortex in the refrigerant.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: September 8, 2020
    Assignee: DENSO CORPORATION
    Inventors: Haruyuki Nishijima, Yoshiaki Takano, Yoshiyuki Yokoyama, Hiroshi Oshitani, Yohei Nagano, Ryota Nakashima
  • Patent number: 10732220
    Abstract: Provided is a prober capable of suppressing the increase in installation area and the increase in device cost, and also improving the throughput, while maintaining the accuracy of the moving position of an alignment device shared by each of measuring units. The prober includes: a plurality of measuring units, each of which has a probe card electrically connected to a test head; a wafer chuck that holds a wafer in which a plurality of chips are formed; an alignment device which performs relative alignment between the probe card and the wafer held by the wafer chuck; a moving device which moves the alignment device among the measuring units; and a positioning and fixing device which is provided for every of the measuring units, and positions and fixes the alignment device which is moved to each of the measuring units.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: August 4, 2020
    Assignee: Tokyo Seimitsu Co., Ltd.
    Inventors: Hiroo Tamura, Katsura Tomotaki, Yoshiyuki Yokoyama, Tomohiro Yoshimochi, Masami Takatori
  • Publication number: 20200094781
    Abstract: An electromagnetic wave utilizing system includes an electromagnetic wave apparatus configured to perform transmitting and/or receiving of an electromagnetic wave, and a heater that heats a passage member. The heater includes a heating element and a holder. The heating element and the holder are transparent to allow the electromagnetic wave to transmit therethrough. The electromagnetic wave apparatus transmits and/or receives the electromagnetic wave while rotating on a horizontal plane. The heater is configured to rotate together with the electromagnetic wave apparatus or to surround the electromagnetic wave apparatus 360 degrees in a horizontal direction.
    Type: Application
    Filed: November 22, 2019
    Publication date: March 26, 2020
    Inventors: Koji OTA, Yoshiyuki YOKOYAMA, Shinichiro NAKAMURA, Kotaro FUKUDA
  • Patent number: 10495350
    Abstract: An ejector-type refrigeration cycle has a compressor, an ejector module, a discharge capacity control section, and a pressure difference determining section. The ejector module has a body providing a gas-liquid separating space. The pressure difference determining section determines whether a low pressure difference operating condition is met. The low pressure difference operating condition is an operating condition in which a pressure difference obtained by subtracting a low-pressure side refrigerant pressure from a high-pressure side refrigerant pressure a predetermined reference pressure difference or lower. The body is provided with an oil return passage that guides a part of a liquid-phase refrigerant to flow from the gas-liquid separating space to a suction side of the compressor. The discharge capacity control section sets a refrigerant discharge capacity to be a predetermined reference discharge capacity or higher when the low pressure difference operating condition is determined to be met.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: December 3, 2019
    Assignee: DENSO CORPORATION
    Inventors: Makoto Kume, Masahiro Yamada, Toshiyuki Tashiro, Yoshinori Araki, Haruyuki Nishijima, Youhei Nagano, Yoshiyuki Yokoyama
  • Patent number: 10465957
    Abstract: An ejector-type refrigeration cycle includes an upstream side gas-liquid separator that separates a refrigerant that has flowed out of a diffuser portion of an ejector into gas and liquid and allows the separated liquid-phase refrigerant to flow to an evaporator without storing the separated liquid-phase refrigerant, and a downstream side gas-liquid separator that separates the refrigerant flowing out of the upstream side gas-liquid separator into gas and liquid, stores the separated liquid-phase refrigerant, and allows the separated gas-phase refrigerant to flow out toward an inlet side of a compressor. The ejector-type refrigeration cycle includes a refrigerant oil bypass passage for introducing a refrigerator oil within the diffuser portion into the downstream side gas-liquid separator.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: November 5, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yoshiyuki Yokoyama, Etsuhisa Yamada, Haruyuki Nishijima, Yoshiaki Takano
  • Patent number: 10442274
    Abstract: An ejector refrigeration cycle device includes: a radiator that dissipates heat from a refrigerant discharged from a compressor; an ejector module that decompresses the refrigerant cooled by the radiator; and an evaporator that evaporates a liquid-phase refrigerant separated in a gas-liquid separation space of the ejector module. A grille shutter is disposed as an inflow-pressure increasing portion between the radiator and a cooling fan blowing the outside air toward the radiator. The grille shutter is operated to decrease the volume of the outside air to be blown toward the radiator when an outside air temperature is equal to or lower than a reference outside air temperature, thereby increasing the pressure of the inflow refrigerant to flow into a nozzle passage of the ejector module.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: October 15, 2019
    Assignee: DENSO CORPORATION
    Inventors: Toshiyuki Tashiro, Masahiro Yamada, Makoto Kume, Haruyuki Nishijima, Youhei Nagano, Yoshiyuki Yokoyama, Yoshinori Araki
  • Patent number: 10378795
    Abstract: An ejector refrigeration cycle includes a bypass passage that guides a refrigerant on an outlet side of an evaporator drawn from a refrigerant suction port of an ejector to a suction port side of a compressor while bypassing a diffuser passage of the ejector. A differential pressure regulating valve is disposed as a bypass flow-rate adjustment device that adjusts a bypass flow rate of the refrigerant circulating though the bypass passage. An enlarged portion for gradually enlarging the passage area is formed at a most downstream part of the refrigerant flow in the bypass passage. During a low-load operation, the differential pressure regulating valve increases the bypass flow rate, thereby allowing the refrigerant to flow into the evaporator connected to the upstream side of a refrigerant suction port using the suction effect of the compressor.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: August 13, 2019
    Assignee: DENSO CORPORATION
    Inventors: Ryu Fukushima, Yoshiyuki Yokoyama, Haruyuki Nishijima
  • Patent number: 10358947
    Abstract: This combined cycle gas turbine plant has a gas turbine (104) and a steam turbine (106) mounted on the same shaft. A control system is configured for switching the plant from a rated mode of operation, in which the plant is operated on gas turbine output and steam turbine output, to a reduced load mode of operation, in which the plant is operated on gas turbine output alone. The switch from the rated mode of operation to the reduced load mode of operation occurs if plant demand decreases below a predetermined threshold. The steam turbine is run under full speed no load conditions in the reduced load mode of operation, and is heated using controlled steam admission, to maintain the steam turbine in a heated ‘stand-by’ state.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: July 23, 2019
    Assignees: MITSUBISHI HITACHI POWER SYSTEMS, LTD., MITSUBISHI HITACHI POWER SYSTEMS EUROPE, LTD.
    Inventors: Yoshiyuki Yokoyama, Jose Manuel Martinez, Elvio Rubio, Pablo Ratia
  • Patent number: 10316865
    Abstract: An ejector has a nozzle, a body, a passage defining member and a drive portion. The body has a refrigerant suction port and a pressure increasing portion. A nozzle passage is defined between an inner surface of the nozzle and an outer surface of the passage defining member and has a minimum sectional area portion, a tapered portion, and an expansion portion. The minimum sectional area portion has a smallest passage sectional area. The tapered portion is located upstream of the minimum sectional area portion in a refrigerant flow direction and has a passage sectional area decreasing toward the minimum sectional area portion gradually. The expansion portion is located downstream of the minimum sectional area portion in the refrigerant flow direction and has a passage sectional area increasing gradually. The passage defining member has a groove that is recessed to increase the passage sectional area of the nozzle passage.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: June 11, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yoshiyuki Yokoyama, Haruyuki Nishijima, Etsuhisa Yamada, Ryota Nakashima, Yoshiaki Takano, Kazunori Mizutori, Yorito Kohara, Hiroshi Shintani
  • Patent number: 10222697
    Abstract: The invention provides a fiber containing (A) a polymer compound containing a structural unit having, in a side chain, at least one kind of organic group selected from a hydroxy group, a hydroxymethyl group and an alkoxymethyl group having 1-5 carbon atoms, and (B) a photoacid generator.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: March 5, 2019
    Assignees: NISSAN CHEMICAL INDUSTRIES, LTD., TOYAMA PREFECTURE
    Inventors: Takahiro Kishioka, Yoshiyuki Yokoyama
  • Publication number: 20190041101
    Abstract: An ejector includes a body including an inflow space into which a refrigerant flows, a passage formation member disposed inside the body and having a conical shape, and a nozzle passage having an annular cross section functioning as a nozzle and a diffuser passage having an annular cross section functioning as a pressurizing portion between an inner wall surface of the body and a conical lateral surface of the passage formation member. A drive mechanism that displaces the passage formation member along a center axis is coupled to an upstream actuating bar which extends from the passage formation member toward the inflow space and is slidably supported by the body. A largest outer diameter portion of an annular member forming a wall surface of the nozzle passage provides a throat portion functioning as an edge for enlarging a passage cross-sectional area to cause a separation vortex in the refrigerant.
    Type: Application
    Filed: January 24, 2017
    Publication date: February 7, 2019
    Inventors: Haruyuki NISHIJIMA, Yoshiaki TAKANO, Yoshiyuki YOKOYAMA, Hiroshi OSHITANI, Yohei NAGANO, Ryota NAKASHIMA
  • Publication number: 20190032677
    Abstract: An ejector includes a body including an inflow space into which a refrigerant flows, a passage formation member disposed inside the body and having a conical shape, and a nozzle passage having an annular cross section which functions as a nozzle and a diffuser passage having an annular cross section which functions as a pressure increase portion, the nozzle passage and the diffuser passage being disposed between an inner wall surface of the body and a conical lateral surface of the passage formation member. A drive mechanism that displaces the passage formation member in a direction along a center axis is coupled to an upstream actuating bar which extends from the passage formation member toward the inflow space and is slidably supported by the body. Center axes of the passage formation member, the upstream actuating bar and the inflow space are coaxial with each other.
    Type: Application
    Filed: January 24, 2017
    Publication date: January 31, 2019
    Inventors: Haruyuki NISHIJIMA, Yoshiaki TAKANO, Yoshiyuki YOKOYAMA, Hiroshi OSHITANI, Yohei NAGANO, Ryota NAKASHIMA
  • Patent number: 10184704
    Abstract: An ejector includes a nozzle, a swirl flow generation portion, a body including a refrigerant suction port and a diffuser portion, a passage forming member, and an actuation device moving the passage forming member. A nozzle passage is defined between the nozzle and the passage forming member. A smallest passage cross-sectional area portion is provided in the nozzle passage. A swirl space that has a shape of a revolution and is coaxial with the nozzle, and a refrigerant inflow passage through which the refrigerant flows into the swirl space are defined in the swirl flow generation portion. The ejector further includes an area adjustment device that changes the passage cross-sectional area of the refrigerant inflow passage. According to this, an efficiency of energy conversion in the nozzle passage can be improved.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: January 22, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yoshiyuki Yokoyama, Haruyuki Nishijima, Yoshiaki Takano
  • Patent number: 10179500
    Abstract: An ejector-type refrigeration cycle includes an ejector module integrated with a gas-liquid separation device. A length of an inlet pipe that connects a liquid-phase refrigerant outflow port of an ejector module to a refrigerant inflow port of an evaporator is shorter than a length of a suction pipe that connects a gas-phase refrigerant outflow port of the ejector module to a suction port of the compressor.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: January 15, 2019
    Assignee: DENSO CORPORATION
    Inventors: Hiroshi Kataoka, Shun Kurata, Isamu Takasugi, Haruyuki Nishijima, Youhei Nagano, Yoshiyuki Yokoyama
  • Patent number: 10145588
    Abstract: An ejector refrigeration cycle has a compressor, a radiator, an ejector, a swirl flow generator, an evaporator, and an oil separator. The compressor compresses refrigerant, mixed with refrigerant oil compatible with a liquid-phase refrigerant, and discharges the high-pressure refrigerant. The ejector has a nozzle and a body having a refrigerant suction port and a pressure increasing part. The swirl flow generator is configured to cause a decompression boiling in the refrigerant by causing the refrigerant to swirl about a center axis of the nozzle. The oil separator separates the refrigerant oil from the high-pressure refrigerant compressed by the compressor and guides the refrigerant oil to flow to a suction side of the compressor. The oil separator decreases a concentration of the refrigerant oil in the refrigerant, which is to flow into the swirl flow generator, so as to promote the decompression boiling of the refrigerant in the swirl flow generator.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: December 4, 2018
    Assignee: DENSO CORPORATION
    Inventors: Youhei Nagano, Haruyuki Nishijima, Yoshiyuki Yokoyama
  • Patent number: 10029538
    Abstract: An ejector-type refrigeration cycle includes a radiator radiating heat of refrigerant discharged from a compressor, an ejector depressurizing the refrigerant cooled in the radiator, a gas-liquid separator separating gas and liquid of the refrigerant flowing out of a diffuser portion of the ejector, an evaporator disposed in a refrigerant passage connecting the gas-liquid separator and a refrigerant suction port of the ejector, and an opening-closing valve switching between a first refrigerant flow path, in which an ejection refrigerant ejected from a nozzle portion of the ejector flows out of the diffuser portion, and a second refrigerant flow path, in which the ejection refrigerant flows out of the refrigerant suction port. When a rotation rate of the compressor is lower than or equal to a standard rotation rate, the first refrigerant flow path is switched to the second refrigerant flow path.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: July 24, 2018
    Assignee: DENSO CORPORATION
    Inventors: Yoichiro Kawamoto, Etsuhisa Yamada, Haruyuki Nishijima, Yoshiaki Takano, Yoshiyuki Yokoyama
  • Publication number: 20180148859
    Abstract: The invention provides a method capable of conveniently producing an intricate and fine resist pattern. The invention also provides a fiber containing a positive-type or negative-type photosensitive material.
    Type: Application
    Filed: April 22, 2016
    Publication date: May 31, 2018
    Applicants: Nissan Chemical Industries, Ltd., Toyama Prefecture
    Inventors: Takahiro KISHIOKA, Yoshiyuki YOKOYAMA
  • Publication number: 20180080482
    Abstract: An ejector includes a nozzle, a body including a refrigerant suction port and a pressure increasing portion, a passage forming member inserted into the nozzle, and an actuation device moving the passage forming member. A nozzle passage includes a smallest passage cross-sectional area portion, a convergent portion, and a divergent portion. The passage forming member includes a tip portion which changes the passage cross-sectional area at the smallest passage cross-sectional area portion when the actuation device moves the passage forming member. A positive displacement amount is defined as an amount of a displacement of the passage forming member when the passage forming member is moved so as to increase the passage cross-sectional area at the smallest passage cross-sectional area portion. The tip portion has a shape in which an increase rate of the smallest passage cross-sectional area portion is increased according to an increase of the positive displacement amount.
    Type: Application
    Filed: February 26, 2016
    Publication date: March 22, 2018
    Inventors: Yoshiyuki YOKOYAMA, Haruyuki NISHIJIMA, Yoshiaki TAKANO