LIFTING DEVICE
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United States of America
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Issued Date -
Jan 9, 2025
app pub date -
Jun 3, 2024
filing date -
Jun 3, 2024
priority date (Note) -
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Abstract
A hanging hand-driven chain hoist, is able to lift, sustain and lower a load hanging on a chain and a hook, by employing a sprocket built in a spherical helical gear driven by the rotational movement of a ring with internal spiral thread, coupled to a drive gear engaged by an drive chain pulled by an operator. An overload prevention and detection system provides safety against operator attempts to lift loads having weights over the capacity of the system.
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