Patents by Inventor Hiroshi Tsukiyasu

Hiroshi Tsukiyasu 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: 5297916
    Abstract: A cargo handling vehicle such as a forklift truck having a push-pull unit is improved in responsibility, operation speed and in precise operability by: replacing a conventional hydraulic cylinder for moving a face member 10 back and forth along forks 9 of the vehicle with an electric motor 32. The thus employed motor 32 also eliminates a fear that a cargo 26 is smudged with oil leaking from the hydraulic cylinder and pressurized-oil supply pipes thereof. In cargo loading and discharging operation conducted by the cargo handling vehicle, the face member 10 of the push-pull unit of the vehicle is automatically operated so as to move back and forth along the forks 9 of the vehicle at the substantially same traveling speed as that of the vehicle in a direction counter to a vehicle traveling direction, whereby the sheet pallet B' carrying the cargo 26 is kept substantially stationary during cargo loading and discharging operation or the vehicle.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: March 29, 1994
    Assignee: Komatsu Forklift Kabushiki Kaisha
    Inventors: Shinsuke Fujikawa, Haruo Kanauchi, Hiroshi Tsukiyasu
  • Patent number: 4710091
    Abstract: In a loading and unloading apparatus, a plurality of guide rails are disposed as directed in the horizontal direction on a front surface of a support plate for a main body of the loading and unloading apparatus, which support plate has a fork at its bottom portion, base portions of a pair of arms which can be arbitrarily opened and closed in the directions of coming close to and separating from each other for clamping and releasing an object, are movably supported by these guide rails, and at the tip end portions of the respective arms are provided hooks which can be arbitrarily moved in the back and forth directions of the arms.
    Type: Grant
    Filed: November 15, 1985
    Date of Patent: December 1, 1987
    Assignees: Toyo Seikan Kaisha, Ltd., Komatsu Forklift Kabushiki Kaisha
    Inventors: Toshio Ochiai, Akio Tsujimura, Hiroshi Tsukiyasu