STAIRLIFTS
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Jan 6, 2011
app pub date -
May 14, 2008
filing date -
May 18, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention provides a enhancement to stairlift safety by separately monitoring the angular movement of a stairlift chair levelling motor, and the angular position of a chair leveled by that motor. By comparing the angular positions, any failure in the levelling system can be readily determined and, in response, a seat locking device can be deployed.
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