Patents by Inventor Tadashi Kumazawa

Tadashi Kumazawa 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 and method for cool air cooling type machining
    Patent number: 6669532
    Abstract: A cold-gas-blow-cooling type machining apparatus including a relative movement device which moves a workpiece and a machining tool relative to each other, and a cold-gas-blow supply device which supplies a cold gas blow to a machining point at which the workpiece is machined by the machining tool. The machining apparatus includes: a workpiece-temperature detecting device which detects a temperature of the workpiece; and a machining-condition control device which controls at least one of the relative movement device and the cold-gas-blow supply device, on the basis of the detected temperature of the workpiece. The machining-condition control device includes a cooling-condition control device which controls the cold-gas-blow supply device so as to control at least one of a temperature and a flow rate of the cold gas blow.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: December 30, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Ryohei Mukai, Mamoru Katsuta, Takayuki Yoshimi, Koji Nishi, Naoto Ono, Yoshihiro Mizutani, Yasunori Kobayashi, Tadashi Kumazawa, Masaaki Sato, Yuji Kubo
  • Device and method for machining in which cool air cooling is used
    Patent number: 6328636
    Abstract: A cold-gas-blow-cooling type machining apparatus in which a cold gas blow is provided to cool a machining tool and a workpiece while the workpiece is machined by the machining tool. The machining apparatus includes: a rectifying device which rectifies the machining tool; a workpiece-temperature detecting device which detects a temperature of the workpiece; and a rectifying-device control device which controls an operation of the rectifying device on the basis of the temperature of the workpiece which is detected by the workpiece-temperature detecting device.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: December 11, 2001
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takayuki Yoshimi, Naoto Ono, Ryohei Mukai, Yasunori Kobayashi, Masaaki Sato, Tadashi Kumazawa, Yuji Kubo, Masanori Matsumoto
  • Method of machining crankshaft
    Patent number: 6161991
    Abstract: A method of machining a crankshaft from a workpiece whereby all of pin and journal portions of the workpiece are milled and thereby machined with a single crankshaft miller unit.
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: December 19, 2000
    Assignee: Komatsu Machinery Corp.
    Inventors: Tadashi Kumazawa, Masumi Shimomura