Patents by Inventor Yukitsugu Kobayashi

Yukitsugu Kobayashi 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).

  • Device for adjusting the phase of roll dies in a cross-rolling machine
    Patent number: 4020664
    Abstract: Apparatus suitable for adjusting the phase between the roll dies in a cross rolling machine, the apparatus comprising a die roll mounted on a roll shaft for rotation by the roll shaft, a boss fixedly secured to the roll shaft for rotation therewith and a drive gear coaxial with the boss, and coupled to the boss, so as to be angularly adjustable with respect thereto, by means of an eccentric cam shaft, whereby rotation of the cam shaft causes angular displacement between the driving gear and the roll shaft.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: May 3, 1977
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Mokuji Koizumi, Yukitsugu Kobayashi
  • Device for holding raw material in a cross-rolling machine
    Patent number: 4020665
    Abstract: A cross-rolling machine including a device for holding a workpiece between the rolls during a forming operation, the device comprising a pair of guide boards each mounted on a frame assembly including a guide bar, so as to be arranged one on each side of the workpiece when the machine is in use, each guide board being movable from the machine frame integrally with its frame assembly by sliding movement of the guide bar along a guide track on the machine frame.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: May 3, 1977
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Mokuji Koizumi, Yukitsugu Kobayashi
  • Process and apparatus for rolling forming a cylindrical member having a reduced diameter portion at its intermediate portion
    Patent number: 3938375
    Abstract: A process and apparatus for rollingly forming a cylindrical member having a reduced diameter portion at its intermediate portion by using a cross-rolling forming apparatus. The width in cross-section each of the dies in the rolls of the apparatus is gradually varied or decreased as the working of the member advances by providing clearance surfaces in the beveled side surfaces of the dies at an appropriate escape angle so that the surfaces in the member which have been worked by the dies are held clear of the side surfaces of the dies.
    Type: Grant
    Filed: January 15, 1974
    Date of Patent: February 17, 1976
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Mokuji Koizumi, Yukitsugu Kobayashi, Hidehiko Tsukamoto, Nobutaka Maeda