Vented hatch cover
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Nov 12, 1991
Grant Date -
N/A
app pub date -
Mar 8, 1990
filing date -
Mar 8, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vented hatch cover for an enclosed vessel having a cover body sized to overlie and cover a hatch opening defined by an upstanding coaming. A pair of air passages are defined by the cover body and a pair of hoods connected thereto. The hoods define air inlet opening and a plenum which communicates with air outlet openings in the interior of the cover body. The air passages permit air flow in sufficient volume to vent the vessel and to empty the vessel by high speed vacuum unloading. A filter is removably retained on the hoods in the air inlet openings. A filter screen on the interior of the cover prevents contamination of the air passages from the inside. A latching arm provides downward pressure on the hatch when in a sealing position and the capability of pivoting the hatch cover together with the latching arm when it is moved. The cover is floatingly engaged in the arm.
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