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Gate operator with speed and torque control

  • US 20040177558A1
  • Filed: 03/11/2003
  • Published: 09/16/2004
  • Est. Priority Date: 03/11/2003
  • Status: Active Grant
First Claim
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1. A barrier movement control apparatus, the apparatus comprising:

  • a) an ultrasonic measurement device positioned to measure a length of a barrier;

    b) an analysis unit to determine various characteristics of the barrier in communicative connection with said ultrasonic measurement device which generates a state signal based on information obtained from said ultrasonic measurement unit; and

    c) a barrier control unit responsive to a state signal from said analysis unit which controls the barrier operational characteristics based on said state signal.

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