Patents by Inventor Ryouji Wakizaka

Ryouji Wakizaka 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).

  • Stair climbing vehicle
    Patent number: 5579857
    Abstract: A vehicle which goes up and down stairs includes a vehicle body (101), front and rear wheels (102) and (103) provided at the front and rear of the vehicle body (101), respectively, front and rear auxiliary wheels (105) and (107) for lifting up or down the front and rear wheels (102) and (103) by one step of stairs, respectively, a driving unit for driving each wheel, a pivoting unit for pivoting the front and rear auxiliary wheels (105) and (107), sensors (121) to (124) for detecting a riser portion of stairs, and a control unit (120) for controlling the driving unit and the rotating unit in accordance with results of the sensors (121) to (124). Since the vehicle goes up and down stairs by rotation of the auxiliary wheels (105) and (107), a corner portion of the step of stairs is not damaged while the vehicle goes up and down stairs.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: December 3, 1996
    Assignee: Kabushiki Kaisha Daikin Seisakusho
    Inventors: Minoru Abe, Heiji Fukutake, Yasuhiko Eguchi, Ryouji Wakizaka, Kyousuke Kitazawa, Akira Takeuchi
  • Stair climbing vehicle
    Patent number: 5507358
    Abstract: A vehicle which goes up and down stairs includes a vehicle body 101, front and rear wheels 102 and 103 provided at the front and rear of the vehicle body 101, respectively, front and rear auxiliary wheels 105 and 107 for lifting up or down the front and rear wheels 102 and 103 by one step of stairs, respectively, a driving unit for driving each wheel, a pivoting unit for pivoting the front and rear auxiliary wheels 105 and 107, sensors 121 to 124 for detecting a riser portion of stairs, and a control unit 120 for controlling the driving unit and the rotating unit in accordance with results of the sensors 121 to 124. Since the vehicle goes up and down stairs by rotation of the auxiliary wheels 105 and 107, a corner portion of the step of stairs is not damaged while the vehicle goes up and down stairs.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: April 16, 1996
    Assignee: Kabushiki Kaisha Daikin Seisakusho
    Inventors: Minoru Abe, Heiji Fukutake, Yasuhiko Eguchi, Ryouji Wakizaka, Kyousuke Kitazawa, Akira Takeuchi