Patents by Inventor Hideyo Yamasaki

Hideyo Yamasaki 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).

  • Liner for pressure vessel and process for fabricating same
    Publication number: 20070158343
    Abstract: A pressure vessel liner includes a tubular trunk, and head plates for closing opposite end openings of the trunk. Provided inside the trunk is a reinforcing member integral with the trunk and extending longitudinally of the trunk for dividing the interior of the trunk into a plurality of spaces. The two head plates are joined respectively to opposite ends of the reinforcing member. The pressure vessel liner has an enhanced pressure resistant strength against longitudinal forces.
    Type: Application
    Filed: February 8, 2005
    Publication date: July 12, 2007
    Applicant: SHOWA DENKO K.K.
    Inventors: Toshiaki Shimada, Yasuki Yoshida, Hirokazu Kuwabara, Yasuhiro Osame, Yasuharu Kanno, Yasuji Kawamata, Hideyo Yamasaki
  • Extrusion die for manufacturing tube with small hollow portions, mandrel used for said extrusion die, and multi-hollowed tube manu-factured by using said extrusion die
    Patent number: 7093474
    Abstract: An extrusion die for manufacturing a tube with a plurality of small hollow portions arranged in a width direction of the tube, includes a female die for defining an outer periphery of the tube and a mandrel combined with the female die. The mandrel includes a body portion and a comb-shaped portion protruded from the body portion, the combe-shaped portion including a plurality of columnar portions desposed in a width direction of the comb-shaped portion at certain intervals. An outer periphery of a tip end portion of each of the plurality of columnar portion constitutes a bearing portion for defining an inner periphery of each of the plurality of small hollow portions of the tube. Each of the plurality of columnar portions has outside surfaces opposed in a thickness direction of the comb-shaped portion, and at least one of the outside surfaces has an inwardly dented portion behind the bearing portion, the inwardly dented portion constituting an extrusion material filling space.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: August 22, 2006
    Assignee: Showa Denko K.K.
    Inventors: Kimihisa Hiramoto, Hideyo Yamasaki, Fumio Shimizu
  • Extrusion die for manufacturing tube with small hollow portions, mandrel used for said extrusion die, and multi-hollowed tube manu-factured by using said extrusion die
    Publication number: 20040244457
    Abstract: An extrusion die for manufacturing a tube with a plurality of small hollow portions arranged in a width direction of the tube, includes a female die for defining an outer periphery of the tube and a mandrel combined with the female die. The mandrel includes a body portion and a comb-shaped portion protruded from the body portion, the combe-shaped portion including a plurality of columnar portions desposed in a width direction of the comb-shaped portion at certain intervals. An outer periphery of a tip end portion of each of the plurality of columnar portion constitutes a bearing portion for defining an inner periphery of each of the plurality of small hollow portions of the tube. Each of the plurality of columnar portions has outside surfaces opposed in a thickness direction of the comb-shaped portion, and at least one of the outside surfaces has an inwardly dented portion behind the bearing portion, the inwardly dented portion constituting an extrusion material filling space.
    Type: Application
    Filed: March 31, 2004
    Publication date: December 9, 2004
    Inventors: Kimihisa Hiramoto, Hideyo Yamasaki, Fumio Shimizu