Patents by Inventor Nobuyuki Izumisawa

Nobuyuki Izumisawa 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).

  • Grinding machine
    Patent number: 4575973
    Abstract: Compressed air fed into a directional control sleeve is alternatingly delivered to two cylinders via a directional control valve. Pistons within the respective cylinders are each provided with a rack gear moved by feeding compressed air into the cylinders. A grindstone attached to a second set of rack gears is reciprocated through pinion gears by movement of the first-mentioned rack gears. As the grindstone reciprocates, a valve operating arm pivotally supported by a pin is caused to rotate back and forth to switch the directional control valve, thereby switching the cylinder that receives the compressed air. The grinding machine is thus capable of performing grinding in continuous fashion.
    Type: Grant
    Filed: June 13, 1984
    Date of Patent: March 18, 1986
    Inventor: Nobuyuki Izumisawa
  • Pneumatic belt sander
    Patent number: D340849
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: November 2, 1993
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Spot weld drill
    Patent number: D344439
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: February 22, 1994
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Air saw
    Patent number: D344878
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: March 8, 1994
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Jitterbug sander
    Patent number: D350467
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: September 13, 1994
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Compact belt sander
    Patent number: D351544
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: October 18, 1994
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Belt sander
    Patent number: D351545
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: October 18, 1994
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Dual action sander
    Patent number: D353310
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: December 13, 1994
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Light weight grinder
    Patent number: D353311
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: December 13, 1994
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Dual action water supply sander
    Patent number: D353312
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: December 13, 1994
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Wet dual action sander
    Patent number: D354425
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: January 17, 1995
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Dust free dual action sander
    Patent number: D357163
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: April 11, 1995
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa
  • Heavy duty belt sander
    Patent number: D357164
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: April 11, 1995
    Assignee: Shinano, Inc.
    Inventor: Nobuyuki Izumisawa