Elevator car control in a landing zone using a machine brake in response to undesired car movement
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United States of America Patent
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Aug 23, 2016
Grant Date -
Dec 12, 2013
app pub date -
Feb 28, 2011
filing date -
Feb 28, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An exemplary method is useful for controlling movement of an elevator car in an elevator system that includes a machine that selectively moves the elevator car and a machine brake that selectively resists movement of the elevator car. The method includes determining whether the elevator car is near a landing and determining whether a door of the elevator car is open. A desired operation includes desired movement of the elevator car while the elevator car is near the landing and the door is open. A determination is made whether the elevator car moves other than according to the desired movement. The machine brake is applied for stopping movement of the elevator car responsive to elevator car movement other than the desired movement while the elevator car is near the landing and the door is open.
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