Patents by Inventor Ikuo Yanagisawa

Ikuo Yanagisawa 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: 5461768
    Abstract: An electrical caulking method for a work made from a magnesium or a magnesium alloy wherein a caulking pin integrally projects from a body, wherein an electric caulking apparatus having two opposing electrodes is used. The work is held between the opposing electrodes so that one electrode contacts the caulking pin and the other electrode contacts the body while an electric current is applied between the electrodes and pressure is exerted therebetween, thereby caulking the caulking pin into a desired shape, and providing at least the one electrode that is brought into contact with the caulking pin of the work of a material having low thermal diffusivity and which is difficult to alloy with magnesium.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: October 31, 1995
    Assignee: Nippon Light Metal Co., Ltd.
    Inventors: Jiro Matsumoto, Ikuo Yanagisawa
  • Patent number: 3945428
    Abstract: A die assembly for squeeze casting of metals wherein a tubular reinforcing die is set on a base, a forming die consists of split dies is inserted in internal contact with the reinforcing die and the surface in internal contact with the reinforcing die is tapered so as to be narrower downward so that, in case a downward force is applied by a sealing die to a molten metal poured into the forming die, the split dies may be pushed in downward along the tapered surface to prevent the molten metal from spitting out.
    Type: Grant
    Filed: June 24, 1974
    Date of Patent: March 23, 1976
    Assignee: Nippon Light Metal Research Laboratory Ltd.
    Inventors: Ikuo Yanagisawa, Toshiyuki Kawai