Patents by Inventor Tetsuya Tokumitsu

Tetsuya Tokumitsu 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).

  • Electric discharge machining electrode wire and manufacturing method therefor
    Patent number: 10399167
    Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an ?-phase of a copper-zinc based alloy. The outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu concentration in a longitudinal direction of the electrode wire.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: September 3, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Takayuki Tsuji, Hiromitsu Kuroda, Tetsuya Tokumitsu, Takamitsu Kimura, Yosuke Shiba, Hiroshi Matsuzaki, Yuichi Komuro, Shingo Amamiya
  • Electric discharge machining electrode wire and manufacturing method therefor
    Patent number: 10384282
    Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an ?-phase of a copper-zinc based alloy. The outermost layer has a Vickers hardness of 200 to 300 Hv.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: August 20, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Takayuki Tsuji, Hiromitsu Kuroda, Tetsuya Tokumitsu, Takamitsu Kimura, Yosuke Shiba, Hiroshi Matsuzaki, Yuichi Komuro, Shingo Amamiya
  • Electrical discharge machining electrode wire and manufacturing method for same
    Patent number: 10307848
    Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer covering a periphery of the core and including a zinc. The covering layer includes an inner layer including a ?-phase of copper-zinc based alloy and covering the periphery of the core, and an outer layer including an ?-phase of copper-zinc based alloy and covering a periphery of the inner layer. An x-ray diffraction intensity of (0001) of the ?-phase is more than twice an x-ray diffraction intensity of (332) of the ?-phase.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: June 4, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Takayuki Tsuji, Hiromitsu Kuroda, Tetsuya Tokumitsu, Takamitsu Kimura, Yosuke Shiba, Hiroshi Matsuzaki, Yuichi Komuro, Shingo Amamiya
  • ELECTRIC DISCHARGE MACHINING ELECTRODE WIRE AND MANUFACTURING METHOD THEREFOR
    Publication number: 20170072489
    Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an ?-phase of a copper-zinc based alloy. The outermost layer has a Vickers hardness of 200 to 300 Hv.
    Type: Application
    Filed: January 7, 2015
    Publication date: March 16, 2017
    Inventors: Takayuki TSUJI, Hiromitsu KURODA, Tetsuya TOKUMITSU, Takamitsu KIMURA, Yosuke SHIBA, Hiroshi MATSUZAKI, Yuichi KOMURO, Shingo AMAMIYA
  • ELECTRIC DISCHARGE MACHINING ELECTRODE WIRE AND MANUFACTURING METHOD THEREFOR
    Publication number: 20170014927
    Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an s-phase of a copper-zinc based alloy. The outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu concentration in a longitudinal direction of the electrode wire.
    Type: Application
    Filed: January 7, 2015
    Publication date: January 19, 2017
    Inventors: Takayuki TSUJI, Hiromitsu KURODA, Tetsuya TOKUMITSU, Takamitsu KIMURA, Yosuke SHIBA, Hiroshi MATSUZAKI, Yuichi KOMURO, Shingo AMAMIYA
  • Composite material
    Patent number: 8771839
    Abstract: A composite material includes a clad material including a base material that includes an iron-chromium alloy and vibration-damping layers that are provided on both surfaces of the base material and include a metal to suppress a vibration. A total thickness of the vibration-damping layers provided on the both surfaces of the base material is in a range of not less than 10% and not more than 40% relative to a total thickness of the clad material.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: July 8, 2014
    Assignee: Hitachi Metals, Ltd.
    Inventors: Kazuma Kuroki, Hiromitsu Kuroda, Tetsuya Tokumitsu