Patents by Inventor Hideaki Ikezawa

Hideaki Ikezawa 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).

  • Patent number: 9003857
    Abstract: A current density changing portion is formed in a heating process on an upper base side with respect to a center portion of a flat metal plate in a direction of current flow, by passing current from a lower base side to the upper base side of the flat metal plate which is rectangular when viewed from above. As a result, a quenchable portion is formed on the upper base side with respect to the center portion of the flat metal plate in the direction of current flow, and a non-quenchable portion is formed on the lower base side with respect to the center portion of the flat metal plate in the direction of current flow. The flat metal plate is press-formed after the heating process, so a complex die cooling structure is not necessary during press-forming, which enables the die cost to be reduced.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: April 14, 2015
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Takaoka Co., Ltd.
    Inventors: Kiyoshi Nonomura, Hiroshi Sato, Hideaki Ikezawa, Yuki Ishiguro, Masashi Ozawa
  • Publication number: 20140302341
    Abstract: In a hot press molding method for press-molding a heated material and cooling the material while holding the material in a mold, during press molding of the material, shape changes including a portion that curves with respect to a longitudinal direction of the material are molded at longitudinal opposite end portions of the material and resistance to thermal contraction force of the material in the longitudinal direction during cooling is imparted. In one embodiment of the present invention, the shape changes molded on the material during the press molding are minute protrusions provided on surfaces of the longitudinal opposite end portions of the material. The invention makes it possible to suppress thermal contraction of the material during cooling in hot press molding to thereby prevent defects associated therewith.
    Type: Application
    Filed: December 26, 2011
    Publication date: October 9, 2014
    Applicants: AISIN TAKAOKA CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuji Egawa, Takanobu Suzuki, Hidetoshi Kimura, Hideaki Ikezawa, Kenji Kato, Masaki Furuhashi
  • Publication number: 20100285328
    Abstract: A current density changing portion is formed in a heating process on an upper base side with respect to a center portion of a flat metal plate in a direction of current flow, by passing current from a lower base side to the upper base side of the flat metal plate which is rectangular when viewed from above. As a result, a quenchable portion is formed on the upper base side with respect to the center portion of the flat metal plate in the direction of current flow, and a non-quenchable portion is formed on the lower base side with respect to the center portion of the flat metal plate in the direction of current flow. The flat metal plate is press-formed after the heating process, so a complex die cooling structure is not necessary during press-forming, which enables the die cost to be reduced.
    Type: Application
    Filed: May 14, 2009
    Publication date: November 11, 2010
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN TAKAOKA CO., LTD.
    Inventors: Kiyoshi Nonomura, Hiroshi Sato, Hideaki Ikezawa, Yuki Ishiguro, Masashi Ozawa