Ships – Building – Freighters
Patent
1977-06-27
1978-11-21
Blix, Trygve M.
Ships
Building
Freighters
220 18, 220435, 220445, 220468, 220901, B63B 2516
Patent
active
041260996
ABSTRACT:
In combination, a ship having a hold, a tank which expands and contracts in the hold for transporting a liquefied gas, the tank comprising a metal shell having a substantially flat metal bottom portion supported by load bearing insulation on the ship hold bottom, the tank having a horizontal collar comprising vertical or sloped wall portions, the hold having a stationary horizontally positioned block having vertical or sloped wall portions having a periphery smaller than the collar, at least the collar wall portions or the block wall portions insulated, whereby at ambient temperature the collar is spaced outwardly from the stationary block periphery and when the tank is at a service lower temperature carrying a liquefied gas the collar contracts with the tank and the collar wall portions tightly contact the block wall portions, and restraining apparatus which prevents horizontal or lateral movement of the tank when empty and at ambient temperature when the ship rolls and pitches.
REFERENCES:
patent: 2993460 (1961-07-01), Preyer
patent: 3076423 (1963-02-01), Leathard
patent: 3261586 (1966-07-01), Bengtsson
patent: 3882809 (1975-05-01), Johnson et al.
patent: 3903824 (1975-09-01), Laverman et al.
Basinger Sherman D.
Blix Trygve M.
Chicago Bridge & Iron Company
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