Hull hole closure for an oil tanker

Ships – Leak stoppers – Aprons – mats – etc.

Patent

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Details

114227, B63B 4316

Patent

active

050091808

ABSTRACT:
A hull hole closure apparatus for use with an oil tanker having a hull hole, to seal the hull hole. A first embodiment of the hull hole closure consists of a flexible, waterproof, rectangular sheet, having forward and aft longitudinal reinforcing straps on its concave side edges, as well as transverse reinforcing straps on the concave top edges, joined at the corners with reinforced corner pieces. The hull hole closure is symmetrical about the keel of the tanker, passing under the keel from the starboard to the port side. Cables, secured to winches or cleats, attach to corners of the hull hole closure, drawing it tightly against the hull. Inflatable forward and aft longitudinal high pressure sealing hoses attached to the inner surface of the sheet, adjacent the side edges, seal the sheet to the hull and keel, while longitudinal inflatable bladders extend outward past the high pressure sealing hoses to fill irregular concave areas in the hull not in contact with the high pressure sealing hoses. Transverse inflatable bladders on the upper portions of the sheet seal the top edges to the hull, preventing oil from washing into the sea. Flaps, secured together by tape or a cable, entrap the longitudinal inflatable bladders in a compacted position until inflation. A second embodiment passes around the bow and under the keel, and has a flap which hooks over the bow. This second embodiment has only aft longitudinal straps and hoses, omitting the forward straps and hoses.

REFERENCES:
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patent: 4026233 (1977-05-01), Cox
patent: 4161155 (1979-07-01), Cloutier
patent: 4569303 (1986-02-01), McDuff et al.
patent: 4712502 (1987-12-01), McDuff et al.

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