Stairlifts
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United States of America Patent
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Jul 5, 2016
Grant Date -
Mar 6, 2014
app pub date -
Mar 5, 2012
filing date -
Mar 4, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides a levelling system for the chair of a stairlift, a characteristic feature of the system being the provision of a safety back-up or locking mechanism that will lock the position of the chair in the event of failure within the levelling drive. This locking mechanism preferably includes a locking wheel that is in partial mesh with a geared wheel forming part of the levelling drive. In the event of failure within the drive the locking wheel meshes to lock the position of the chair.
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