Patents by Inventor Masayuki Yosida

Masayuki Yosida 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: 5441127
    Abstract: An elevator control apparatus comprises a torque command generating device for generating a torque command, a converter device for supplying electric power to a motor for driving an elevator car, a car position calculation device for calculating the present position of the elevator car, a compensation device for calculating an unbalanced rope torque on the sides of the elevator car and a counterweight from the torque command generated by the torque command generating device and the present position of the elevator car calculated by the car position calculation device, a load weighing device for detecting a load in the elevator car, and a final torque command supply device for adding outputs of the compensation device and the load weighing device to the torque command generated by the torque command generating device and supplying the torque command as a final torque command to the converter device.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: August 15, 1995
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroyuki Ikejima, Sigemi Iwata, Masayuki Yosida