Patents by Inventor Takeshi Nakahira

Takeshi Nakahira 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: 10889526
    Abstract: An environmental resistant coating member includes a SiC long fiber-reinforced ceramics substrate and an environmental barrier coating layer provided on the whole surface of the SiC long fiber-reinforced ceramics substrate. The environmental barrier coating layer includes a SiAlON bonding layer laminated on the SiC long fiber-reinforced ceramics substrate, a mullite layer laminated on the SiAlON bonding layer, a reaction inhibition layer laminated on the mullite layer, and a gradient layer formed on the reaction inhibition layer that gradually changes from a rare-earth disilicate to a rare-earth monosilicate. The reaction inhibition layer includes at least one of an alumina layer, a garnet layer, and a rare-earth (mono)silicate layer. When the reaction inhibition layer includes two or more of these layers, the layers are formed in the order of the alumina layer, the garnet layer, and the rare-earth (mono)silicate layer from a mullite layer side toward a gradient layer side.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: January 12, 2021
    Assignees: Japan Fine Ceramics Center, IHI Cornoration
    Inventors: Norio Yamaguchi, Taishi Yokoi, Kenji Nakahira, Hiroshi Nomura, Satoshi Kitaoka, Takeshi Nakamura, Tsuyoshi Takemoto
  • Patent number: 10746080
    Abstract: An exhaust system device (1) for a vehicle (100) comprises an exhaust purification device (18) and a first exhaust gas recirculation (EGR) cooler (24). The exhaust purification device (18) is disposed with a central axis of a downstream-side end inclined downwardly toward a rear side of the vehicle (100). The EGR cooler (24) is provided so as to introduce exhaust from a downstream side of the exhaust purification device (18), is adjacent to the exhaust purification device (18) and fixed to the exhaust purification device (18), and is disposed such that a central axis of the EGR cooler (24) is inclined downwardly toward the rear side of the vehicle.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: August 18, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Takeshi Nakahira, Yuji Kojima, Amane Tsuda
  • Publication number: 20200191100
    Abstract: An engine (1) of a vehicle powertrain unit (P) includes: an electric exhaust S-VT (27) that is mounted on one end of an exhaust camshaft (26) and changes a rotational phase of the exhaust camshaft; and an EGR device (60) that is provided outside an engine body (10) and connects an intake passage (30) and an exhaust passage (50) together. The EGR device is located closer to a cylinder block (13) than the electric exhaust S-VT in a direction from a cylinder head (14) to the cylinder block, and is arranged so that at least a part of the EGR device and the electric exhaust S-VT overlap with each other when viewed in the direction from the cylinder head to the cylinder block.
    Type: Application
    Filed: August 1, 2018
    Publication date: June 18, 2020
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Tomohiro KOGUCHI, Shinji FUJIHIRA, Ryotaro NISHIDA, Takeshi NAKAHIRA
  • Patent number: 10626805
    Abstract: The present disclosure improves serviceability of an automotive powertrain unit without deteriorating NVH characteristics. A powertrain includes an engine having a cylinder head; and a transmission coupled to the engine. The engine includes an EGR connected between an intake passage and an exhaust passage. The transmission is provided below the cylinder head in a vehicle height direction. The EGR is provided along a side of the cylinder head toward the transmission, and supported by the transmission.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: April 21, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Tomohiro Koguchi, Shinji Fujihira, Ryotaro Nishida, Takeshi Nakahira
  • Publication number: 20200095923
    Abstract: An intake and exhaust device (1) for a vehicle engine is capable to perform a compression self-ignition operation, the device comprising on an intake passage a supercharger (9) driven by a force other than an exhaust gas, wherein an exhaust purification device (18) disposed on an exhaust passage is disposed adjacent to an outer surface of the engine (2).
    Type: Application
    Filed: July 27, 2017
    Publication date: March 26, 2020
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hirokazu HASEGAWA, Keishi KITABATAKE, Taku KURAMASHI, Ryotaro NISHIDA, Mitsunori WASADA, Takeshi NAKAHIRA, Yuji KOJIMA, Amane TSUDA
  • Publication number: 20200025158
    Abstract: An exhaust system device (1) for a vehicle (100) comprises an exhaust purification device (18) and a first exhaust gas recreation (EGR) cooler (24). The exhaust purification device (18) is disposed with a central axis of a downstream-side end inclined downwardly toward a rear side of the vehicle (100). The EGR cooler (24) is provided so as to introduce exhaust from a downstream side of the exhaust purification device (18), is adjacent to the exhaust purification device (18) and fixed to the exhaust purification device (18), and is disposed such that a central axis of the EGR cooler (24) is inclined downwardly toward the rear side of the vehicle.
    Type: Application
    Filed: July 27, 2017
    Publication date: January 23, 2020
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Takeshi NAKAHIRA, Yuji KOJIMA, Amane TSUDA
  • Publication number: 20200003104
    Abstract: A vehicle engine 2 comprises an exhaust system having an exhaust manifold 12 and an exhaust purification device 18. The exhaust manifold 12 is disposed at a predetermined distance from a dash panel 106 constituting a body of the vehicle 100, the exhaust purification device 18 is disposed in a position overlapping a floor tunnel region 114, formed by a floor tunnel of the body, and is disposed below the exhaust manifold 12 and to one side of the center of the engine 2 in the cylinder-array direction, as viewed from the longitudinal direction of the vehicle 100. An exhaust purification device introduction passage 17 connecting the exhaust manifold 12 and the exhaust purification device 18 is disposed on the other side of the center of the exhaust manifold 12 in the cylinder-array direction, and extends below the exhaust manifold 12 to be connected to the exhaust purification device 18.
    Type: Application
    Filed: July 27, 2017
    Publication date: January 2, 2020
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Keishi KITABATAKE, Taku KURAMASHI, Tamotsu TAKAMURE, Takeshi NAKAHIRA, Yuji KOJIMA, Amane TSUDA
  • Publication number: 20190063340
    Abstract: The present disclosure improves serviceability of an automotive powertrain unit without deteriorating NVH characteristics. A powertrain includes an engine having a cylinder head; and a transmission coupled to the engine. The engine includes an EGR connected between an intake passage and an exhaust passage. The transmission is provided below the cylinder head in a vehicle height direction. The EGR is provided along a side of the cylinder head toward the transmission, and supported by the transmission.
    Type: Application
    Filed: August 14, 2018
    Publication date: February 28, 2019
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Tomohiro KOGUCHI, Shinji FUJIHIRA, Ryotaro NISHIDA, Takeshi NAKAHIRA
  • Patent number: 6341570
    Abstract: A method of sewing the toe of a sock is provided which can automatically take out a sock pattern of knitted fabric from a sock knitting machine and sew up the selvedge at the toe portion of the sock pattern of knitted fabric thus improving both the efficiency of production and the energy saving. When a sock pattern of knitted fabric has been fabricated by the sock knitting machine, the transfer needles mounted on a group of transfer needles equipped movable tables are advanced at their tips close to the hooks of knitting needles. Then, the sock pattern of knitted fabric is lifted up and turned inside out by suction to transfer its loops at the toe portion from the knitting needles to the corresponding transfer needles. As a result, the sock pattern of knitted fabric turned inside out is transferred from the sock knitting machine to the transfer needles equipped movable tables.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: January 29, 2002
    Assignee: Maruzen Sangyo Co., Ltd.
    Inventors: Toshifumi Fujiwara, Takeshi Nakahira, Takahiro Ueda, Yusuke Shibata
  • Publication number: 20010039816
    Abstract: A method of sewing the toe of a sock is provided which can automatically take out a sock pattern of knitted fabric from a sock knitting machine and sew up the selvedge at the toe portion of the sock pattern of knitted fabric thus improving both the efficiency of production and the energy saving.
    Type: Application
    Filed: April 2, 2001
    Publication date: November 15, 2001
    Inventors: Toshifumi Fujiwara, Takeshi Nakahira, Takahiro Ueda, Yusuke Shibata