Braking device for elevating platform assembly
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United States of America Patent
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Mar 22, 2011
Grant Date -
Nov 6, 2008
app pub date -
May 19, 2006
filing date -
May 19, 2006
priority date (Note) -
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Abstract
A braking device for an elevated platform assembly comprising a platform moveable along a generally vertical mast supporting an upright rack comprises an input gear assembly in mating engagement with the rack, a centrifugal actuator communicating with the input assembly and a spring-loaded brake responsive to the centrifugal actuator. The spring-loaded brake engages the rack and arrests the platform when the platform descends the mast at a rate above an upper threshold limit.
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