Method and equipment for the evacuation of lift passengers
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United States of America Patent
Stats
-
Feb 1, 2005
Grant Date -
Aug 1, 2002
app pub date -
Jan 10, 2002
filing date -
Jan 26, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and equipment is provided to allow a stuck elevator lift cage to be moved in situations when the lift cage and passengers is in weight equalization with the lift counterweight. With the lift's safety brake dis-engaged and the lift drive unactuated, the drive brake is released and an additional force is applied to the lift cage from a source external to the lift drive to move the lift cage to a position for passenger evacuation. The additional force may be applied through a cable pull connected to the limiter cable of the elevator's speed monitor system.
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