Patents by Inventor Kiyotaka Touma

Kiyotaka Touma 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).

  • Aluminum alloy material for forging and continuous casting process therefor
    Patent number: 7070735
    Abstract: An aluminum alloy material for forging obtained by a continuous casting process, the alloy comprising: a surface of which roughness is not more than Ra 35, and a segregation layer having 0.1 to 2 mm thickness and generated in the surface. The cast surface after continuous casting is smooth without peeling, a cast material can be forged without any treatment, and a segregation layer remains in a surface layer, thereby inhibiting coarsening of recrystallization grains and exhibiting superior toughness and strength.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: July 4, 2006
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Toyama Alloy Co., Ltd.
    Inventors: Kiyotaka Touma, Yushi Amaki, Ichiro Fujimoto, Tomokazu Yamashita, Hidetoshi Takagi, Toru Watanabe
  • Aluminum alloy material for forging and continuous casting process therefor
    Publication number: 20040134572
    Abstract: An aluminum alloy material for forging obtained by a continuous casting process, the alloy comprising: a surface of which roughness is not more than Ra 35, and a segregation layer having 0.1 to 2 mm thickness and generated in the surface. The cast surface after continuous casting is smooth without peeling, a cast material can be forged without any treatment, and a segregation layer remains in a surface layer, thereby inhibiting coarsening of recrystallization grains and exhibiting superior toughness and strength.
    Type: Application
    Filed: July 22, 2003
    Publication date: July 15, 2004
    Inventors: Kiyotaka Touma, Yushi Amaki, Ichiro Fujimoto, Tomokazu Yamashita, Hidetoshi Takagi, Toru Watanabe
  • Tool holding an elongate profile material to be sliced
    Patent number: 5499801
    Abstract: An end holder (5) has a main recess (8) and cavities (8a) to fit on an end of an extruded aluminum profile material (1) having a semi-hollow portions (1a). Each of chucks (6) can protrude into the semi-hollow portion placed in the cavity (8a) so as to chuck the inner surface of said portion (1a), so that the end of material (1) can be firmly held in place while it is being severed from a body of the material to thereby produce high quality slices of an improved precision in dimension and shape.
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: March 19, 1996
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Showa Aluminum Corporation
    Inventors: Yasushi Nakazawa, Kiyotaka Touma, Masatoshi Enomoto