Apparatus for removing a vacuum bag of a ship stern

Details Apparatus for removing a vacuum bag of a ship stern Apparatus for removing a vacuum bag of a ship stern

1997-02-11

1997-12-30

Swinehart, Ed L.

Ships

Building

Antifriction surfaces

114 56, B63B 134

Patent

active

057018367

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.

REFERENCES:
patent: 688672 (1901-12-01), Niemeyer
patent: 1005698 (1911-10-01), Dillon
patent: 1093692 (1914-04-01), Gawley
patent: 1254892 (1918-01-01), Elniff

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