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Lift system with reduced power

  • US 20040089502A1
  • Filed: 11/11/2002
  • Published: 05/13/2004
  • Est. Priority Date: 11/11/2002
  • Status: Abandoned Application
First Claim
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1. A lift system with reduced power comprising:

  • a car running inside a special lift-shaft; and

    at least one drive unit which raises and lowers the car, with the at least one drive unit having;

    at least two power systems; and

    wherein the car includes;

    a sensor system to detect the load in the car in order to switch the at least one drive unit to one of the at least two power systems.

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