Patents by Inventor Toshio Tokune

Toshio Tokune 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).

  • High strength and high ductility tial-based intermetallic compound and process for producing the same
    Patent number: 5514333
    Abstract: A high strength and high ductility TiAl-based intermetallic compound includes a content of aluminum in a range represented by 42.0 atom %.ltoreq.Al.ltoreq.50.0 atom %, a content of vanadium in a range represented by 1.0 atom %.ltoreq.V.ltoreq.3.0 atom %, a content of niobium in a range represented by 1.0 atom %.ltoreq.Nb.ltoreq.10.0 atom %, a content of boron in a range represented by 0.03 atom %.ltoreq.B.ltoreq.2.2 atom %, and the balance of titanium and unavoidable impurities. A product of the TiAl-based intermetallic compound is formed by only casting or casting followed by a homogenizing thermal treatment.
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: May 7, 1996
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yoshiya Fujiwara, Toshio Tokune
  • TiAl-based intermetallic compound with excellent high temperature strength
    Patent number: 5431754
    Abstract: A TiAl-based intermetallic compound has a metallographic structure which includes a region A having fine .beta.-phases dispersed in a .gamma.-phase. The volume fraction Vf of the .beta.-phases in the region A is set equal to or more than 0.1% (Vf.gtoreq.0.1%). Thus, the .beta.-phases can exhibit a pinning effect to prevent a transgranular pseudo cleavage fracture in the .gamma.-phase, thereby providing an enhanced high-temperature strength of the TiAl-based intermetallic compound.
    Type: Grant
    Filed: October 5, 1993
    Date of Patent: July 11, 1995
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yoshiya Fujiwara, Toshio Tokune
  • Structural member made of titanium alloy having embedded beta phase of different densities and hard metals
    Patent number: 5139585
    Abstract: A structural member made of titanium or titanium alloy has a metal structure at its surface layer portion formed of a plurality of kinds of .beta.-phases of different characteristics which are present in combination.
    Type: Grant
    Filed: August 7, 1990
    Date of Patent: August 18, 1992
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Naoya Watanabe, Tatsuya Hohda, Toshio Tokune, Yoshihiko Wajima