Patents by Inventor Katsumasa Toyoda

Katsumasa Toyoda 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).

  • Oil removing method for a pipe coil
    Patent number: 5784803
    Abstract: A pipe coil is heated in the furnace of a heat treatment apparatus. The oil adhered to the inside of the pipe is vaporized by this heating. In this state the oil removing gas is fed at one end into the pipe which gas is in the high temperature enough to maintain the vaporizing condition of the oil. The vaporized oil within the pipe is discharged by the feeding of the gas at the other end of the pipe while the oil is in the vaporized state.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: July 28, 1998
    Assignee: Daidotokushuko Kabushikikaisha
    Inventors: Katsumasa Toyoda, Takashi Miyajima, Yoshihiro Umeda
  • Hardening process and apparatus for holed flat parts
    Patent number: 5667603
    Abstract: A process for hardening a plurality of holed flat parts. The holed flat parts are heated by inserting a cantilever hanger into the holes of the holed flat parts to support them in vertical positions within a furnace. The holed flat parts are then removed from the hanger by inserting a moving fork into the holes of the holed flat parts and moved to a cooling section while being supported in the vertical positions on the moving fork. Then, the holed flat parts in the vertical positions are quenched in the cooling section by blowing a gas downward to them. Also disclosed is an apparatus for practicing the holed flat part hardening process.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: September 16, 1997
    Assignee: NTN Corporation
    Inventors: Masanori Ichikawa, Tadayoshi Yoshioka, Katsumasa Toyoda, Shinichi Takizawa
  • Oil removing apparatus and oil removing method for a pipe coil
    Patent number: 5603167
    Abstract: A pipe coil is heated in the furnace of a heat treatment apparatus, The oil adhered to the inside of the pipe is vaporized by this heating, In this state the oil removing gas is fed at one end into the pipe which gas is in the high temperature enough to maintain the vaporizing condition of the oil.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: February 18, 1997
    Assignee: Daidotokushuko Kabushikikaisha
    Inventors: Katsumasa Toyoda, Takashi Miyajima, Yoshihiro Umeda