Patents by Inventor Takeshi Ojiro

Takeshi Ojiro 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).

  • Abrasion resistant copper alloy, copper alloy powder for build-up cladding, and engine cylinder head
    Patent number: 6531003
    Abstract: A valve seat (2) is formed by build-up cladding by irradiating a laser beam on a copper alloy powder (4) provided in the rim of a port (3) formed in an engine cylinder head (1). The copper alloy powder (4) consists of copper (Cu), 6-9 wt % nickel (Ni), 1-5 wt % silicon (Si), and 1-5 wt % of one of molybdenum (Mo), tungsten (W), tantalum (Ta), niobium (Nb) and vanadium (V). Due to this composition, the valve seat (2) has few microcracks and excellent abrasion resistance.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: March 11, 2003
    Assignees: Mitsui Mining & Smelting Co., Ltd., Nissan Motor Co., Ltd.
    Inventors: Ryuji Ninomiya, Takeshi Ojiro, Koichi Miyake, Makoto Kano, Kenji Tsushima, Hidenobu Matsuyama, Kenji Suzuki
  • ABRAION RESISTANT COPPER ALLOY, COPPER ALLOY POWDER FOR BUILD-UP CLADDING, AND ENGINE CYLINDER HEAD
    Publication number: 20010001641
    Abstract: A valve seat (2) is formed by build-up cladding by irradiating a laser beam on a copper alloy powder (4) provided in the rim of a port (3) formed in an engine cylinder head (1). The copper alloy powder (4) consists of copper (Cu), 6-9 wt % nickel (Ni), 1-5 wt % silicon (si), and 1-5 wt % of one of molybdenum (Mo), tungsten (W), tantalum (Ta), niobium (Nb) and vanadium (V). Due to this composition, the valve seat (2) has few microcracks and excellent abrasion resistance.
    Type: Application
    Filed: February 22, 1999
    Publication date: May 24, 2001
    Applicant: Ryuji Ninomiya
    Inventors: RYUJI NINOMIYA, TAKESHI OJIRO, KOICHI MIYAKE, MAKOTO KANO, KENJI TSUSHIMA, HIDENOBU MATSUYAMA, KENJI SUZUKI
  • Abrasion resistant copper alloy
    Patent number: 5911949
    Abstract: An abrasion resistant copper alloy suitable for the material of an overlaid layer formed at the valve seat of an engine cylinder head formed of aluminum alloy. The copper alloy consists essentially of nickel in an amount ranging from 10 to 30% by weight; silicon in an amount ranging from 0.5 to 5.0% by weight; at least one element selected from the group consisting of molybdenum, tungsten, tantalum, niobium and vanadium, in an amount ranging from 2.0 to 15.0% by weight; and balance being copper and impurities.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: June 15, 1999
    Assignees: Nissan Motor Co., Ltd., Mitsui Mining & Smelting Co., Ltd.
    Inventors: Ryuji Ninomiya, Takeshi Ojiro, Makoto Kano, Hidenobu Matsuyama