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High torque gearless actuation at low speeds for swing gate, roll-up gate, slide gate, and vehicular barrier operators

  • US 7,816,875 B2
  • Filed: 01/24/2008
  • Issued: 10/19/2010
  • Est. Priority Date: 01/24/2008
  • Status: Active Grant
First Claim
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1. A method for gearless operation of a slide gate capable of high torque actuation at slow speeds, comprising:

  • adapting a frame member to support a Lorentz force motor;

    attaching said Lorentz force motor directly to a slide gate so that said swing gate moves at a substantially similar speed as a rotation speed of said Lorentz force motor;

    adapting a controller to control said rotation of said Lorentz force motor;

    connecting a sensor to said controller, said sensor adapted to generate a signal after detecting a predefined event;

    retrofitting said Lorentz force motor with a sprocket, wherein said sprocket is rotably coupled to said Lorentz force motor;

    attaching a chain to said sprocket;

    attaching an idle wheel for maintaining said chain mechanically connected to said sprocket, wherein said chain runs parallel to a track, and wherein said chain is adapted to transfer a mechanical force generated by said Lorentz motor to said slide gate; and

    adapting said slide gate to move on said track.

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