Patents by Inventor Eiji Isogai

Eiji Isogai 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: 7957918
    Abstract: A computer performs press forming analysis based on a shape of a formed product or of a member, a blank holder force, a friction coefficient, a tensile strength of a material, a yield strength, a stress-strain relation, and a sheet thickness, as press forming conditions, to calculate sheet thickness distribution and post-formation strain distribution of the formed product. The computer also performs performance analysis based on the sheet thickness distribution, the post-formation strain distribution, and the shape of the formed product or of the member, as state amounts of the formed product. This calculate performance of the member.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: June 7, 2011
    Assignees: Nippon Steel Corporation, Arcelor France
    Inventors: Toshiyuki Niwa, Hiroshi Yoshida, Eiji Isogai, Yuichi Yoshida
  • Publication number: 20110048380
    Abstract: A fuel delivery pipe for delivering fuel to a plurality of fuel injection valves corresponding to cylinders of an internal -combustion engine. The fuel delivery pipe includes a pipe body made of carbon steel for machine structural use and a plating film disposed on an inner surface of the pipe body. Preferably the fuel delivery pipe includes a plating film disposed on an outer surface of the pipe body.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 3, 2011
    Inventor: Eiji ISOGAI
  • Publication number: 20090119031
    Abstract: A first step where a computer performs press forming analysis based on a shape of a formed product or a shape of a member, a blank holder force, a friction coefficient, a tensile strength of a material, a yield strength, a stress-strain relation, and a sheet thickness, as press forming conditions, to calculate sheet thickness distribution and post-formation strain distribution of the formed product; and a second step where the computer performs performance analysis based on the sheet thickness distribution, the post-formation strain distribution, and the shape of the formed product or the shape of the member, as state amounts of the formed product, to calculate performance of the member are included, in which the computer repeats the calculations performed in the process from the first step through the second step a predetermined number of times, with at least one of the press forming conditions being changed, to output an optimum press forming condition that gives a maximum value or a target value of the per
    Type: Application
    Filed: June 28, 2006
    Publication date: May 7, 2009
    Inventors: Toshiyuki Niwa, Hiroshi Yoshida, Eiji Isogai, Yuichi Yoshida
  • Publication number: 20080250895
    Abstract: An inner hole 31 to which a driving shaft 2 is inserted is formed in a campiece 3 of a camshaft 1, and a plurality of grooves 34 extending in the insertion direction of the driving shaft 2 are formed in the inner hole 31. The driving shaft 2 is inserted into the inner hole 31 with the cam piece 3 heated to expand the diameter of the inner hole 31. By reducing again the diameter of the inner hole 31 by cooling it in this state, an outer circumferential surface of the driving shaft 2 is pressed and raised by the inner hole 31 and enters the groove 34, by which the cam piece 3 is firmly fixed onto the driving shaft 2.
    Type: Application
    Filed: January 19, 2006
    Publication date: October 16, 2008
    Inventors: Tamotsu Yamamoto, Eiji Isogai, Kazumasa Kinoshita, Kunihiro Nishimura, Hidekazu Sato