Patents by Inventor Koji Yamashita

Koji Yamashita 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: 10208987
    Abstract: An air-conditioning apparatus includes a bypass pipe that has one end connected to the discharge side of a compressor and through which refrigerant exiting the compressor flows, an auxiliary heat exchanger that is connected to the other end of the bypass pipe and the suction part of the compressor, and cools refrigerant flowing through the bypass pipe and supplies the cooled refrigerant to the suction part of the compressor, and a flow regulating unit that is provided on the refrigerant outlet side of the auxiliary heat exchanger, and regulates the flow rate of refrigerant routed into the suction part of the compressor from the auxiliary heat exchanger.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: February 19, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Soshi Ikeda, Shinichi Wakamoto, Naofumi Takenaka, Koji Yamashita, Takeshi Hatomura
  • Patent number: 10211879
    Abstract: A front-end module includes a duplexer, a band pass filter, and a terminating circuit element. A first signal path connects an output terminal of a power amplifier and a transmit node of the duplexer. The band pass filter is disposed on a second signal path between a branch point and a ground. The second signal path branches off from the first signal path at the branch point. The band pass filter has frequency characteristics in which, among frequency components of a transmit signal output from the power amplifier, frequency components that overlap at least part of the pass band of a receive filter of the duplexer are allowed to pass through the band pass filter. The terminating circuit element is disposed on the second signal path between the band pass filter and the ground. The terminating circuit element attenuates a transmit signal passing through the band pass filter.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: February 19, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takeshi Abiru, Koji Yamashita, Takeshi Kogure
  • Patent number: 10168068
    Abstract: An air-conditioning apparatus includes: a first bypass pipe connected to an inlet-side passage of an accumulator through a second expansion device, a second passage of a subcooling heat exchanger for exchanging heat between refrigerant flowing through the second passage of the subcooling heat exchanger and refrigerant flowing through a first passage of the subcooling heat exchanger, and a first opening and closing device; a second bypass pipe branched from the first bypass pipe between the subcooling heat exchanger and the first opening and closing device and connected to an injection port of a compressor through a second opening and closing device; and a third bypass pipe branched from a refrigerant pipe between a heat source-side heat exchanger and a use-side heat exchanger and connected to a refrigerant pipe between an inlet side of the compressor and an outlet side of the accumulator through a third expansion device.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: January 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventor: Koji Yamashita
  • Patent number: 10156060
    Abstract: A rotation drive apparatus for rotating an upper rotary body of a construction machine, the rotation drive apparatus eliminating, while achieving a fundamental goal of stopping a rotation when an emergency stop operation is performed, wasteful stopping by a parking brake. The apparatus includes: an emergency stop switch; a rotation control section which performs control to stop a rotating motor when the emergency stop operation is applied to the emergency stop switch; and a timer which activates the parking brake when a set period of time has elapsed after the emergency stop operation is performed. Preferably, the rotation control section detects a failure of an inverter and causes the parking brake to perform a braking operation before the elapse of the set period of time when the failure is detected.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: December 18, 2018
    Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Koji Yamashita, Takayuki Doi
  • Patent number: 10111342
    Abstract: Provided is a solder transfer sheet which is capable of increasing the amount of solder to be transferred without the occurrence of bridging. A solder transfer sheet 1A includes a base material 5, an adhesive layer 4 formed on the surface of the base material 5, a solder powder-containing adhesive layer 3 formed on the surface of the adhesive layer 4, and a solder powder layer 2 formed on the surface of the solder powder-containing adhesive layer 3. In the solder powder layer 2, particles of solder powder 20 are arranged in a one-layer sheet form. In the solder powder-containing adhesive layer 3, solder powder 30 and an adhesive component 31 are mixed so as to have such a thickness that two or more layers of the solder powder 30 are stacked.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: October 23, 2018
    Assignees: Senju Metal Industry Co., Ltd., Nitta Corporation
    Inventors: Kaichi Tsuruta, Takeo Saitoh, Manabu Muraoka, Hiroki Oshima, Koji Yamashita, Shinichiro Kawahara
  • Patent number: 10107514
    Abstract: An air-conditioning apparatus includes a refrigerant circuit connecting a compressor, a first heat exchanger, a first expansion device, and a second heat exchanger. The compressor and the first heat exchanger are housed in a heat source unit, the heat source unit, houses a second expansion device provided at a location on a downstream side with respect to the first heat exchanger and on an upstream side with respect to the first expansion device, and the second expansion device and the first expansion device are connected via an extension pipe. The second expansion device reduces a pressure of refrigerant flowing into the extension pipe in cooling operation to cause the refrigerant to turn into refrigerant having a medium pressure and in a two-phase state, and the medium pressure is lower than a refrigerant pressure in a condenser and higher than a refrigerant pressure in an evaporator.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: October 23, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventor: Koji Yamashita
  • Patent number: 10107537
    Abstract: A controller performs medium pressure control that controls the opening degree of a second expansion device based on a deviation between a target value of medium pressure, and a detection result of a medium pressure detector or a predicted value. The controller controls the opening degree of a third expansion device based on a target value of a discharge refrigerant temperature of a compressor or a target value related to the discharge refrigerant temperature, and a detection result of a discharge refrigerant temperature detector or a value related to the discharge refrigerant temperature computed using a detected detection result, and regulates a flow rate of refrigerant to supply to a suction side of the compressor via an injection pipe.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: October 23, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Katsuhiro Ishimura, Koji Yamashita, Shinichi Wakamoto, Naofumi Takenaka
  • Patent number: 10107533
    Abstract: An air-conditioning apparatus includes a refrigerant circuit formed by connecting, with pipes, a compressor to compress refrigerant and discharge the compressed refrigerant, a first heat exchanger, a subcooling heat exchanger exchanges heat between a portion of the refrigerant flowing in a first flow passage and another portion of the refrigerant flowing in a second flow passage to subcool the portion of refrigerant flowing in the first flow passage, a first expansion device to decompress the refrigerant, a second heat exchanger, and an accumulator connected to a suction side of the compressor and configured to store excess refrigerant, so that the refrigerant is circulated through the refrigerant circuit. The air-conditioning apparatus is configured to prevent the discharge temperature of the compressor from being excessively increased irrespective of the operation mode and therefore prevent damage to the compressor.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: October 23, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yamashita, Katsuhiro Ishimura, Takeshi Hatomura, Soshi Ikeda, Shinichi Wakamoto, Naofumi Takenaka
  • Patent number: 10094604
    Abstract: An air-conditioning apparatus cools and heats a first heat transfer medium at the same time in a relay unit, and the cooled first heat transfer medium and the heated first heat transfer medium are separately distributed to a plurality of indoor units.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: October 9, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventor: Koji Yamashita
  • Patent number: 10088205
    Abstract: An air-conditioning apparatus includes: a first bypass pipe connected to an inlet-side passage of an accumulator through a second expansion device, a second passage of a subcooling heat exchanger for exchanging heat between refrigerant flowing through the second passage of the subcooling heat exchanger and refrigerant flowing through a first passage of the subcooling heat exchanger, and a first opening and closing device; a second bypass pipe branched from the first bypass pipe between the subcooling heat exchanger and the first opening and closing device and connected to an injection port of a compressor through a second opening and closing device; and a third bypass pipe branched from a refrigerant pipe between a heat source-side heat exchanger and a use-side heat exchanger and connected to a refrigerant pipe between an inlet side of the compressor and an outlet side of the accumulator through a third expansion device.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: October 2, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventor: Koji Yamashita
  • Publication number: 20180269922
    Abstract: A front-end module includes a duplexer, a band pass filter, and a terminating circuit element. A first signal path connects an output terminal of a power amplifier and a transmit node of the duplexer. The band pass filter is disposed on a second signal path between a branch point and a ground. The second signal path branches off from the first signal path at the branch point. The band pass filter has frequency characteristics in which, among frequency components of a transmit signal output from the power amplifier, frequency components that overlap at least part of the pass band of a receive filter of the duplexer are allowed to pass through the band pass filter. The terminating circuit element is disposed on the second signal path between the band pass filter and the ground. The terminating circuit element attenuates a transmit signal passing through the band pass filter.
    Type: Application
    Filed: March 14, 2018
    Publication date: September 20, 2018
    Inventors: Takeshi ABIRU, Koji YAMASHITA, Takeshi KOGURE
  • Publication number: 20180266743
    Abstract: An air-conditioning apparatus is capable of efficiently performing defrosting operation without suspending a heating operation of an indoor unit. The air-conditioning apparatus includes a main circuit sequentially connecting, via a pipe, a compressor, indoor heat exchangers, first flow control devices, and a plurality of parallel heat exchangers connected in parallel to each other to allow refrigerant to circulate, first defrost pipes branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant to flow into one of the plurality of parallel heat exchangers and to be defrosted, an interface heat exchanger located between the plurality of parallel heat exchangers, a first bypass pipe branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant to flow into the interface heat exchanger, and a second bypass pipe causing the part of the refrigerant flowing out of the interface heat exchanger to flow into the main circuit.
    Type: Application
    Filed: January 13, 2015
    Publication date: September 20, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kazuya WATANABE, Shinichi WAKAMOTO, Naofumi TAKENAKA, Naomichi TAMURA, Tadashi ARIYAMA, Koji YAMASHITA, Takeshi HATOMURA
  • Patent number: 10054337
    Abstract: An air-conditioning apparatus is capable of cooling a first heat medium and heating the first heat medium at the same time in a relay unit, and the cooled first heat medium and the heated first heat medium can be separately distributed to a plurality of indoor units. Waste heat of a first refrigerant circuit can be discharged to an outdoor space via a second heat medium and the second refrigerant.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: August 21, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventor: Koji Yamashita
  • Publication number: 20180218924
    Abstract: A substrate liquid treatment apparatus includes an inner tank configured to store a treatment liquid and having an upper opening, an outer tank disposed outside the inner tank, and a lid movable between a close position for closing the upper opening of the inner tank and an open position for opening the upper opening of the inner tank. The lid includes a main portion that covers the upper opening of the inner tank when the lid is positioned at the close position, and a splash shielding portion connected to the main portion. When the lid is positioned at the close position, the splash shielding portion extends from a position higher than an upper end of a side wall of the inner tank adjacent to the splash shielding portion to a position which is lower than the upper end of the side wall and which is on the outer tank side of the side wall.
    Type: Application
    Filed: January 30, 2018
    Publication date: August 2, 2018
    Applicant: Tokyo Electron Limited
    Inventors: Koji TANAKA, Toshiyuki SHIOKAWA, Koji YAMASHITA, Hiroyuki MASUTOMI, Hitoshi KOSUGI, Takao INADA, Takashi IKEDA, Tsukasa HIRAYAMA
  • Patent number: 10036562
    Abstract: An air-conditioning apparatus divides an outdoor heat exchanger to form parallel heat exchangers and supplies part of refrigerant from a compressor to the parallel heat exchangers alternately to perform defrosting, performs medium-pressure defrosting in which part of the refrigerant from the compressor is decompressed and supplied to a parallel heat exchanger to be subjected to defrosting, and the refrigerant after being used for defrosting is injected into the compressor. A first flow switching unit performs switching of a connection mode of ends of the parallel heat exchangers on compressor side, where the pressure changes among high pressure, medium pressure, and low pressure according to operation contents, to one of three modes: a mode with the ends connected to the compressor discharge side, a mode with the ends connected to the compressor suction side, and a mode with the ends connected to neither the discharge nor suction side.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: July 31, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Takeshi Hatomura
  • Patent number: 10018389
    Abstract: An air-conditioning apparatus including a refrigeration cycle configured by connecting one or more load-side units including a load-side heat exchanger and a load-side expansion device with a heat-source-side unit including a heat-source-side heat exchanger and a compressor and by causing refrigerant to circulate through a refrigerant circuit including the load-side heat exchanger, the load-side expansion device, the heat-source-side heat exchanger, and the compressor, controls, during a heating operation, the opening degree of the load-side expansion device, based on the discharge pressure of the compressor, so that the pressure of refrigerant at the outlet of the compressor becomes equal to a target pressure, in the case where the operation capacity of the compressor is approximately at the maximum value of the operation capacity of the compressor.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: July 10, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kosuke Tanaka, Koji Yamashita, Takeshi Hatomura, Shinichi Wakamoto, Naofumi Takenaka
  • Patent number: 10018388
    Abstract: An outdoor unit, connected with indoor units by pipes to constitute a refrigerant circuit, includes a compressor configured to compress and discharge refrigerant, a plurality of parallel heat exchangers configured to allow heat exchange between air and the refrigerant, a first defrosting pipe serving as a flow path for branching a part of the refrigerant discharged by the compressor and allowing the refrigerant to flow into the parallel heat exchanger to be defrosted for defrosting, a first expansion device configured to decompress the refrigerant passing through the first defrosting pipe, a second expansion device configured to adjust the pressure of the refrigerant that passed through the parallel heat exchanger to be defrosted, and a controller configured to control the second expansion device such that the pressure of the refrigerant that passed through the parallel heat exchanger to be defrosted falls within a predetermined range.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: July 10, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naofumi Takenaka, Shinichi Wakamoto, Kazuya Watanabe, Koji Yamashita, Takeshi Hatomura
  • Publication number: 20180179734
    Abstract: When it is confirmed that a distal end portion of an attachment has reached a predetermined distance detection start position apart from a cab on the basis of a posture of the attachment detected by posture detector, a control apparatus determines whether or not an object to be detected has reached a predetermined stop position closer to the cab than the distance detection start position on the basis of a distance of the object to be detected by a distance detection sensor, and controls the drive unit so as to stop the attachment when determining that the object to be detected has reached the stop position, and the control apparatus controls the drive unit so that the speed of the distal end portion of the attachment becomes a predetermined target speed or lower when the distal end portion of the attachment reaches the distance detection start position.
    Type: Application
    Filed: April 13, 2016
    Publication date: June 28, 2018
    Applicant: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventor: Koji YAMASHITA
  • Patent number: 10005938
    Abstract: A thermosensitive adhesive contains a side chain crystal polymer having a melting point of 20-30° C., and a tackifier. The side chain crystal polymer is obtainable by adding a metal chelate compound in the following amount of addition (A) into the following copolymer, followed by a crosslinking reaction. Adhesive strength is to be deteriorated at a temperature below the melting point. The copolymer is obtainable by polymerizing 25-30 parts by weight of (meth)acrylate having a straight-chain alkyl group having 16 to 22 carbon atoms, 60-65 parts by weight of (meth)acrylate having an alkyl group having 1 to 6 carbon atoms, 1-10 parts by weight of a polar monomer, and 1-10 parts by weight of a reactive fluorine compound. The amount of addition (A) is 3-10 parts by weight with respect to 100 parts by weight of a copolymer.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: June 26, 2018
    Assignee: Nitta Corporation
    Inventors: Minoru Nanchi, Koji Yamashita, Ayumi Nagao, Shinichiro Kawahara
  • Patent number: 10001317
    Abstract: An air-conditioning apparatus includes a main circuit in which a compressor, an indoor heat exchanger, a first flow control device, and a plurality of parallel heat exchangers connected in parallel to each other are sequentially connected via a pipe to allow refrigerant to circulate, a first defrost pipe that branches a part of the refrigerant discharged from the compressor and allows the refrigerant to flow into the parallel heat exchanger to be defrosted among the plurality of parallel heat exchangers, a expansion device provided in the first defrost pipe and configured to depressurize the refrigerant discharged from the compressor, and a connection switching device that allows the refrigerant flowing out of the parallel heat exchanger to be defrosted to flow into the main circuit at a position upstream of the parallel heat exchangers other than the parallel heat exchanger subject to defrosting.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: June 19, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Takeshi Hatomura