Apparatus for removing a vacuum bag of a ship stern
OwnerI-Hua Tsuiinventor
Life of this patent
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Abstract
A device for removing a vacuum bag from a ship stern includes a passageway and plural valve units fixed in holes of an outer wall of the stern. The passageway is formed by air entrances in a rear deck, and a space between an inner wall and an outer wall of the stern is divided into plural sections with vertical support plates bored with air holes, and holes bored in the outer walls of the stern. Each valve unit is fixed with each of the holes, normally closing the hole and opening it when the speed of water filling the vacuum bag is slower than the speed of a moving ship enabling open air to flow into the vacuum bag just behind the stern.
Claims5
In a snip, a device for removing a vacuum bag from a stern thereof, comprising an air passageway formed in the stern of said ship for open air flow into said vacuum bag arising just behind said stern so as to diminish suction force of said vacuum bag acting on said stern, said passageway comprising a plurality of air entrances provided in an upper surface of a rear deck of said stern, a space formed between an inner wall and an outer wall of said stern, said space being separated with a plurality of vertical support plates into plural sections, a plurality of holes spaced apart in said outer wall and each provided with a valve unit, and a rearwardly projecting generally upwardly concave stop wall extending aft of the stern from a bottom of said ship, whereby air exhausted from said plurality of openings into an area above said stop wall and aft of said stern diminishing said suction drag caused by said vacuum bag.
Dependencies are inferred from the claim text.