Patents by Inventor Kazuki Niwa

Kazuki Niwa 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: 20200208022
    Abstract: Provided is a PSA sheet with reduced dependence on fossil-resource-based materials while having an acrylic PSA. The PSA sheet provided includes a PSA layer. The PSA layer is formed from a PSA composition including an acrylic polymer. The acrylic polymer is a polymer of monomers that include more than 50% (by weight) acrylic monomer. At least 50% of all carbons in the PSA layer are biomass-derived carbons. The PSA sheet has a peel strength of less than 3 N/20 mm to a stainless steel plate.
    Type: Application
    Filed: December 20, 2019
    Publication date: July 2, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masahito Niwa, Shigeki Watanabe, Masataka Nishiwaki, Kazuki Minoura
  • Publication number: 20200208026
    Abstract: Provided is a PSA composition with greatly reduced dependence on fossil-resource-based materials while comprising an acrylic PSA. The PSA composition provided includes a PSA. The PSA is an acrylic PSA including an acrylic polymer. The acrylic polymer is formed from monomers including more than 50% (by weight) acrylic monomer. At least 50% of all carbons in the PSA are biomass-based carbons.
    Type: Application
    Filed: December 20, 2019
    Publication date: July 2, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masahito NIWA, Shigeki WATANABE, Masataka NISHIWAKI, Kazuki MINOURA
  • Publication number: 20200095473
    Abstract: Provided is a PSA sheet for use in electronic devices. The PSA sheet has a PSA layer formed from a natural rubber-based PSA. The base polymer of the PSA comprises a methyl methacrylate-modified natural rubber and at least 50% of all carbons in the PSA layer comes from biomass-derived carbons. The PSA sheet shows a displaced length of 1.0 mm/60 min or less in a heat-resistant holding power test carried out at 80° C.
    Type: Application
    Filed: September 20, 2019
    Publication date: March 26, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shigeki Watanabe, Masahito Niwa, Masataka Nishiwaki, Kazuki Minoura
  • Publication number: 20200095474
    Abstract: Provided is a PSA sheet for electronic devices with reduced dependence on fossil-resource-based materials and is also suited for use in electronic devices. The PSA sheet for use in electronic devices provided has a PSA layer formed from a natural rubber-based PSA. At least 20% by weight of all repeat units forming the base polymer of the PSA comes from an acrylic monomer and at least 50% of the total carbon content of the PSA layer is attributed to biomass-derived carbons. The PSA sheet has a shear bonding strength of 1.8 MPa or greater.
    Type: Application
    Filed: September 20, 2019
    Publication date: March 26, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shigeki WATANABE, Masahito NIWA, Masataka NISHIWAKI, Kazuki MINOURA
  • Patent number: 10589560
    Abstract: This invention forms a good unrepellent uniform coating film and an image having neither image missing nor image blur by using an inkjet printing method. Active energy ray curing inkjet ink contains (A) an active energy ray curing monomer and/or an active energy ray curing oligomer, (B) a photopolymerization initiator, and (C) a surface tension adjusting agent, and has a viscosity of 3.0 to 6.0 mPa·s at 35° C.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: March 17, 2020
    Assignees: DUPLO CORPORATION, ASIA STENCIL PAPER CO., LTD.
    Inventors: Shuhei Yamamoto, Kazuhiro Tanaka, Tomohiko Niwa, Kazuki Imai
  • Patent number: 10547225
    Abstract: A method for producing an electric motor provided with a stator core configured by laminating a required number of annular electromagnetic steel sheets having a plurality of tooth portions on an inner periphery thereof. The circumferential widths of the tooth portions become gradually narrower in a stepwise fashion toward an uppermost surface and an undermost surface of the plurality of laminated electromagnetic steel sheets, whereby the shoulder portions on both sides in a circumferential direction of the tooth portions smoothly change. A flexible, planar insulating member is provided having a first portion of a shape similar to a planar shape of said electromagnetic steel sheet, and further comprising flexible ear portions at positions corresponding to shoulder portions on both sides in a circumferential direction of the tooth portions.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: January 28, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa
  • Patent number: 10547224
    Abstract: An electric motor is provided with a stator core (3) configured by laminating a required number of annular electromagnetic steel sheets (5) having a plurality of tooth portions (4) around each of which a coil winding is wound, on the inner periphery side, wherein circumferential widths (B) of the tooth portion (4) in the plurality of electromagnetic steel sheets (5) which are laminated on both end sides of the stator core (3) become gradually narrow coward the respective end portion sides, and the coil winding is directly wound around the tooth portion (4) in which shoulder portions (7) on doth sides in a circumferential direction of the tooth portion (4) which is formed by lamination of the electromagnetic steel sheets (5) are shoulder portions (7) which smoothly change so as to narrow in width in a stepwise fashion toward the respective end portions.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: January 28, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa
  • Publication number: 20190181711
    Abstract: A method for producing an electric motor provided with a stator core configured by laminating a required number of annular electromagnetic steel sheets having a plurality of tooth portions on an inner periphery thereof. The circumferential widths of the tooth portions become gradually narrower in a stepwise fashion toward an uppermost surface and an undermost surface of the plurality of laminated electromagnetic steel sheets, whereby the shoulder portions on both sides in a circumferential direction of the tooth portions smoothly change. A flexible, planar insulating member is provided having a first portion of a shape similar to a planar shape of said electromagnetic steel sheet, and further comprising flexible ear portions at positions corresponding to shoulder portions on both sides in a circumferential direction of the tooth portions.
    Type: Application
    Filed: December 10, 2018
    Publication date: June 13, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto HATTORI, Masahiko ASAI, Kazuki NIWA
  • Patent number: 9909578
    Abstract: There is provided an integrated electric compressor that can be made small in size while reducing radio noise effectively. In an inverter of the electric compressor, a snubber circuit 21 comprising a resistor R and a capacitor C is provided between input/output terminals 20 of a power source and a switching element 18. The snubber circuit 21 is formed by surface mounting a resistive element constituting the resistor R and a capacitor element constituting the capacitor C on a power board 16. A leakage current from a motor 19 is thus restrained and radio noise is reduced. The resistive element and the capacitor element constituting the snubber circuit 21 are preferably surface mounted on the power board 16 on the side opposite to the side on which a control circuit board is arranged.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: March 6, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shigeo Kasai, Koji Nakano, Koji Toyama, Makoto Hattori, Kazuki Niwa
  • Patent number: 9494149
    Abstract: In an inverter-integrated electric compressor (1) provided with an inverter accommodating section (9) on the periphery of a housing (2) and an inverter (20) provided therein, the inverter accommodating section (9) is divided into a first accommodating section (9) accommodating an inverter module (21) equipped with a power system board on which semiconductor switching devices etc. are mounted and a CPU board on which a control and communication circuit etc. are mounted, and a second accommodating section (40) accommodating high-voltage-system components (30), such as a common-mode coil (35), a normal-mode coil (36), and a smoothing capacitor (37), provided on a high-voltage line (34) for supplying DC power from a high-voltage power supply to the inverter module (21), the accommodating sections (9) and (40) being separately provided on the periphery of the housing (2).
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: November 15, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takayuki Watanabe, Takeshi Hirano, Makoto Hattori, Kazuki Niwa, Takashi Nakagami, Koji Toyama
  • Patent number: 9293969
    Abstract: The present invention has an object to provide an inverter module and an inverter integrated electric compressor capable of reliably suppressing noise interference on a control circuit board and facilitating filling with a resin gel material. Provided is an inverter module including a power system circuit board and a control circuit board (30) that are integrated through a resin case, in which an insulating through hole (47) is provided in a region between: a frame ground (42) connected to a high voltage system formed on the control circuit board (30); and a low voltage circuit (46) adjacent to the frame ground (42).
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: March 22, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa
  • Patent number: 9033715
    Abstract: Provided are an inter-board connection terminal with which electrical connection between two boards can be simplified, the operability and productivity thereof can be enhanced, and reliability of electrical connection can also be ensured, as well as an inverter and an electric compressor employing the same. An inter-board connection terminal includes a group of numerous metal terminals which is inserted, individually at both tips thereof, into through-holes in boards to electrically connect two boards, wherein paired resin linking members are provided, which have a predetermined space therebetween with respect to the group of metal terminals and which join the group of metal terminals into a single unit by linking the terminals in the form of a row at both tips thereof near the bases of portions to be inserted into the through-holes in the boards.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: May 19, 2015
    Assignee: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa, Hiroyuki Kamitani, Takashi Hattori
  • Publication number: 20150069878
    Abstract: An electric motor is provided with a stator core (3) configured by laminating a required number of annular electromagnetic steel sheets (5) having a plurality of tooth portions (4) around each of which a coil winding is wound, on the inner periphery side, wherein circumferential widths (B) of the tooth portion (4) in the plurality of electromagnetic steel sheets (5) which are laminated on both end. sides of the stator core (3) become gradually narrow coward the respective end portion sides, and the coil winding is directly wound around the tooth portion (4) in which shoulder portions (7) on doth sides in a circumferential direction of the tooth portion (4) which is formed by lamination of the electromagnetic steel sheets (5) are shoulder portions (7) which smoothly change so as to narrow in width in a stepwise fashion toward the respective end portions.
    Type: Application
    Filed: April 23, 2013
    Publication date: March 12, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa
  • Patent number: 8842436
    Abstract: An object is to provide an inverter module that can ensure satisfactory anti-vibration strength, moisture resistance, and isolation for each of the upper and lower boards of the inverter module and that can reduce the weight and cost, and to provide an integrated-inverter electric compressor. In an inverter module (21) in which a power system board (23) and a control board (31) are integrated via a resin case (22), the inverter module (21) is configured such that the power system board (23), on which a semiconductor switching device (24) is mounted, is provided at the lower part of the resin case (22) and the control board (31), on which a control-and-communication circuit is mounted, is provided thereabove.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: September 23, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa, Takayuki Takashige, Koji Nakano, Takashi Nakagami, Shunsuke Yakushiji
  • Patent number: 8793051
    Abstract: The electrical power consumption and cost of a control system for an air conditioning apparatus are reduced. A control system for an air conditioning apparatus mounted in a vehicle includes a plurality of vehicle-side ECUs (control units) that control devices provided in the air conditioning apparatus; and a signal control unit that controls the plurality of vehicle-side ECUs wherein the plurality of vehicle-side ECUs are divided into groups each having a common ON/OFF combination for the individual operating modes of the vehicle, and the vehicle-side ECUs belonging to the same group are connected by a common signal line; and the signal control unit sends ON and OFF signals depending on the operating mode of the vehicle to the signal lines.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: July 29, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazuki Niwa, Makoto Hattori, Toyohisa Kawashima, Masahiko Asai
  • Patent number: 8764415
    Abstract: An integrated-inverter electric compressor whose grounding effect and grounding reliability are increased by reliably grounding an inverter device to a housing and in which the size the inverter device are reduced by simplifying the grounding structure is provided. The integrated-inverter electric compressor includes an inverter device provided in an inverter container on the outer circumference of a housing.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: July 1, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Hattori, Kazuki Niwa, Koji Nakano, Takashi Nakagami, Takayuki Takashige, Koji Toyama
  • Patent number: 8717765
    Abstract: An integrated-inverter electric compressor and an inverter unit thereof are provided, with which sufficient anti-vibration properties can be ensured and weight reduction can be achieved. In an integrated-inverter electric compressor, an inverter unit includes an inverter module in which a power-system metallic board having mounted thereon semiconductor switching elements and so forth is integrated with a plastic case, and a CPU board having mounted thereon a control and communication circuit that operates at a low voltage, such as a CPU, is provided on a top face of the inverter module, and inside the plastic case, a thermosetting resin layer for insulation and anti-humidity purposes is provided so as to cover a top face of the power-system metallic board, and a vibration-absorbing elastomeric adhesive layer that maintains a rubber state in an operating temperature range of the integrated-inverter electric compressor is provided between a bottom face of the CPU board and the thermosetting resin layer.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: May 6, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Hattori, Kazuki Niwa, Takashi Nakagami, Koji Nakano, Shunsuke Yakushiji
  • Publication number: 20130178078
    Abstract: Provided are an inter-board connection terminal with which electrical connection between two boards can be simplified, the operability and productivity thereof can be enhanced, and reliability of electrical connection can also be ensured, as well as an inverter and an electric compressor employing the same. An inter-board connection terminal includes a group of numerous metal terminals which is inserted, individually at both tips thereof, into through-holes in boards to electrically connect two boards, wherein paired resin linking members are provided, which have a predetermined space therebetween with respect to the group of metal terminals and which join the group of metal terminals into a single unit by linking the terminals in the form of a row at both tips thereof near the bases of portions to be inserted into the through-holes in the boards.
    Type: Application
    Filed: January 17, 2012
    Publication date: July 11, 2013
    Applicant: Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa, Hiroyuki Kamitani, Takashi Hattori
  • Publication number: 20130069494
    Abstract: The present invention has an object to provide an inverter module and an inverter integrated electric compressor capable of reliably suppressing noise interference on a control circuit board and facilitating filling with a resin gel material. Provided is an inverter module including a power system circuit board and a control circuit board (30) that are integrated through a resin case, in which an insulating through hole (47) is provided in a region between: a frame ground (42) connected to a high voltage system formed on the control circuit board (30); and a low voltage circuit (46) adjacent to the frame ground (42).
    Type: Application
    Filed: October 6, 2011
    Publication date: March 21, 2013
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa
  • Patent number: 8365545
    Abstract: The present invention has an object to provide an on-vehicle air conditioner that can prevent breakage or the like caused by applying a high voltage. In an inverter system 20 that controls an operation of a motor 30 of a compressor for the on-vehicle air conditioner, a motor control microcomputer 24 operates by converting a voltage supplied from an on-vehicle battery power source 50 into a low voltage. Thus, the motor control microcomputer 24 is operated to perform failure diagnosis of a high voltage circuit Cb without a high voltage power source 40 being turned on. The failure diagnosis can be performed without power being supplied from the high voltage power source 40 to the high voltage circuit Cb, thereby preventing the high voltage circuit Cb from being broken by applying the high voltage even when there is some failure in the high voltage circuit Cb.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: February 5, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Takehiro Adachi, Koji Nakano, Takashi Nakagami, Makoto Hattori, Kazuki Niwa, Takayuki Takashige