Safety device for an air balancing hoist
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United States of America Patent
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Dec 6, 1994
Grant Date -
N/A
app pub date -
Mar 12, 1993
filing date -
Mar 12, 1993
priority date (Note) -
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Abstract
A safety device for an air balancing hoist includes one or more piston and cylinder shock absorbers engaged by one end of the drum ball nut, which creates a substantial retarding force at high speed but does not generate significant impeding forces at low speeds.
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