Patents by Inventor Tsuguo Ieda

Tsuguo Ieda 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: 4056964
    Abstract: An improved apparatus for metal extrusion comprises a main container for receiving a billet as a material to be extruded, a press stem with a splitting disc in the front thereof for pushing the billet, a die assembly retaining a die for extruding the product, and a holding means such as a sub-container located between the main container and the die-assembly for retaining extrusion remnant or butt. An improved extrusion method is also disclosed comprising feeding the billet to the rear end of the main container by means of a billet loading means, inserting the billet into the container by means of the stem provided with a detachable disc or undetachable one in the front thereof, extruding the billet through the die by moving the stem toward the die while longitudinally splitting apart billet "shell" or crust produced during the extrusion into a plurality of strips or pieces, and retracting the stem to the original position. Each of the metal extrusion steps are repeated sequentially in the preset order.
    Type: Grant
    Filed: January 15, 1976
    Date of Patent: November 8, 1977
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Tadashi Shibasaki, Tsuguo Ieda