Patents by Inventor Shigeo Hanajima

Shigeo Hanajima 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).

  • Ti-base wire rod for forming molten metal
    Patent number: 6582833
    Abstract: A Ti-base wire rod for forming molten metal excellent both in rod feeding smoothness and arc stability is disclosed. A wire rod 301 is composed of Ti metal, and has in the surficial portion including the surface thereof an oxygen enriched layer having an oxygen concentration higher than that in an inner portion. Ratio Tw/Dw of the thickness Tw of the oxygen enriched layer and the diameter Dw of the wire rod is adjusted within a range of 1×10−3 to 1×10−1, and the average oxygen concentration of the oxygen enriched layer is adjusted to 1 wt % or above.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: June 24, 2003
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Kazuhiro Toyoda, Makoto Chujoya, Shigeo Hanajima, Takashi Suzuki, Takashi Orii, Takao Shimizu, Toshiharu Noda, Bunji Naito, Kohachiro Ohashi
  • Ti-base wirerod for forming molten metal
    Publication number: 20030084969
    Abstract: A Ti-base wire rod for forming molten metal excellent both in rod Seeding smoothness and arc stability is disclosed. A wire rod 301 is composed of Ti metal, and has in the surficial portion including the surface thereof an oxygen enriched layer having an oxygen concentration higher than that in an inner portion. Ratio Tw/Dw of the thickness Tw of the oxygen enriched layer and the diameter Dw of the wire rod is adjusted within a range from 1×10−3 to 1×10−1, and the average oxygen concentration of the oxygen enriched layer is adjusted to 1 wt % or above.
    Type: Application
    Filed: July 11, 2002
    Publication date: May 8, 2003
    Applicant: Daido Tokushuko Kabushiki Kaisha
    Inventors: Kazuhiro Toyoda, Makoto Chujoya, Shigeo Hanajima, Takashi Suzuki, Takashi Orii, Takao Shimizu, Toshiharu Noda, Bunji Naito, Kohachiro Ohashi
  • Gas shielded arc welding method
    Patent number: 6538234
    Abstract: Gas shielded arc welding is performed using gas nozzle 10 which includes a straight portion 14 that permits the shielding gas flows from orifices 18 to flow parallel to the axial direction and a constricted portion 20 continuous from the straight portion 14 that constricts the gas flows from the straight portion 14 as they travel toward the distal end and the nozzle 10 satisfies the following relations (1) and (2): 1.5≦(Dp/Do)≦2.5  (1) 1.0≦(L/Dp)  (2) where Dp is the inside diameter of the straight portion 14, Do is the inside diameter of the distal gas outlet of the constricted portion 20, and L is the axial length of the constricted portion 20.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: March 25, 2003
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Kazuhiro Toyoda, Noboru Yamamoto, Shigeo Hanajima
  • Gas shielded arc welding method
    Publication number: 20020017504
    Abstract: Gas shielded arc welding is performed using gas nozzle 10 which comprises a straight portion 14 that permits the shielding gas flows from orifices 18 to flow parallel to the axial direction and a constricted portion 20 continuous from the straight portion 14 that constricts the gas flows from the straight portion 14 as they travel toward the distal end and the nozzle 10 satisfies the following relations (1) and (2):
    Type: Application
    Filed: July 3, 2001
    Publication date: February 14, 2002
    Applicant: Daido Tokushuko Kabushiki Kaisha
    Inventors: Kazuhiro Toyoda, Noboru Yamamoto, Shigeo Hanajima