Hoistway access detection system
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United States of America Patent
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-
Aug 5, 2003
Grant Date -
May 22, 2003
app pub date -
Nov 16, 2001
filing date -
Nov 16, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An improved hoistway access detection system including three safety chains, one for monitoring door position on the even numbered floors, one for monitoring door position on the odd numbered floors, and one for monitoring the position of the pit door, wherein an elevator car is slowly moved to the alternate floor upon detection and subsequent closure of an open pit door and any landing door.
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