Ships – Building – Freighters
Patent
1977-08-01
1978-10-03
Blix, Trygve M.
Ships
Building
Freighters
220 85B, B63B 2512
Patent
active
041177967
ABSTRACT:
A special type of tank that can be built into or placed in the cargo space of a ship to contain ballast water or another liquid without cross-contamination with the cargo residues, i.e. allowing for the carriage of segregated ballast in the cargo space. Allowance is also made for double-bottom space in the ship's loaded condition. A large part of the top, or lid, of the special tank is movable in a vertical direction from the highest part of the tank to the lowest part of the tank and special machinery and safety devices are fitted to expedite this movement. A rubber or flexible fabric sheet, which is watertight, connects the moveable and stationary part of the tank top and divides the tank into an upper and a lower section between which there is no communication. The flexible sheet is designed to take the internal contours of the inner tank when the cargo is loaded.
REFERENCES:
patent: 2461537 (1949-02-01), Feild
patent: 3477401 (1969-11-01), Hayama
patent: 3821876 (1974-07-01), Glaspell
patent: 3943873 (1976-03-01), Hering
Blix Trygve M.
Kent W. Charles
Kern D. W.
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