Self-expanding waterproof cover for crane hook
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United States of America Patent
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-
Mar 21, 1995
Grant Date -
N/A
app pub date -
Dec 29, 1993
filing date -
Dec 29, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A bellows-like construction which automatically extends upon immersion in water, is used to provide a relatively inexpensive water-tight enclosure for lifting equipment and the like. The lower end of the bellows is connected to the top of a rigid tubular member which extends up from a hook box or like type of structure, in a manner to form a hermetic seal. The upper end of the bellows-like arrangement is provided with a buoyant member which provides sufficient lift that, when the lifting equipment is lowered into the water to a predetermined depth, the buoyant member floats on the surface of the water in a manner which elongates a corrugated tubular portion of the arrangement and prevents radioactive water from spilling over into the box thus preventing contamination of a hook, hook block and associated apparatus which are enclosed therein.
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