Manual hoist with overload preventer
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United States of America Patent
Stats
-
Sep 6, 1988
Grant Date -
N/A
app pub date -
Aug 26, 1987
filing date -
Sep 10, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A manual hoist with overload preventer wherein rotation in the winding direction under overload is automatically arrested; however, when an overload develops after hoisting or pinching of a load, unwinding is possible. The apparatus includes an operation ring, and a friction ring and a drive ring both being capable of engaging the operation ring. When the driving ring is turned in the winding direction, the operation ring remains engaged with both the friction ring and the drive ring, enabling the relative rotation of the drive ring and the friction ring. When the drive ring is turned in the unwinding direction, the drive ring and the friction ring are rotated as a unit through the operation ring.
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