Patents Represented by Law Firm Leydigt, Voit & Mayer
  • Patent number: 5174416
    Abstract: A linear induction motor for an elevator which includes a secondary, stationary element having a body formed with a plurality of iron-core mounting holes arranged longitudinally of the body at a certain interval, and iron cores disposed in the holes. The stationary, secondary element allows magnetic flux flowing therethrough to pass through the iron cores, thereby reducing the dimension of the total magnetic gap in the motor. Furthermore, the combination of the iron cores in which eddy currents flow with difficulty and the body along which eddy currents tend to flow makes it possible to reduce the ineffective eddy currents.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: December 29, 1992
    Assignee: Mitsubishi Denki Kabushika Kaisha
    Inventors: Shigekazu Sakabe, Takehiko Kubota, Kazuhiko Sugita, Toshiaki Ishii, Hiroyuki Ikejima