VERTICAL LIFT MECHANISM FOR USE IN CONFINED SPACES
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United States of America Patent
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Issued Date -
Oct 18, 2012
app pub date -
Apr 17, 2012
filing date -
Apr 18, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A compact lift apparatus for use in confined spaces to raise and lower an object is described. The apparatus includes first and second drag chains with upper object mourning ends that are moveable along paths having adjacent vertical inner sections with lower ends and chain storage sections extending outwardly from the lower ends of the lower sections, the chain storage sections extending outwardly in opposite directions; spaced parallel plates on opposite sides of the chains, the plates including inner faces that together define drag chain raceways forming the paths; and drive means simultaneously conveying the drag chains along the paths between the lowered and raised positions to raise and lower the mounting ends, the drive means including first and second rotatable sprockets having teeth engaging the chain lengths and a drive means to rotate at least one of the sprockets.
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