Helical seamed structural vessel and method of forming same

Details Helical seamed structural vessel and method of forming same Helical seamed structural vessel and method of forming same

1983-06-28

1985-04-09

Blix, Trygve M.

Ships

Building

138148, 138154, 138113, 138114, 138149, 138150, B63B 906, B63B 300, F16L 916, F16L 918

Patent

active

045094470

ABSTRACT:
A double-wall structural vessel includes an inner tubular liner and an outer tubular shell surrounding the liner in spaced relation, both the liner and the shell comprising helically curved strips of material, and a continuous and helically curved spacer/stiffener therebetween. The liner and shell are relatively shifted axially such that the shell edges are out of alignment with the liner edges, and the spacer spans contiguous edges at successive turns of the liner as well as at successive turns of the shell, and is secured to the strips as well as to the liner edges and to the shell edges.

REFERENCES:
patent: 3693648 (1972-09-01), Sassin
patent: 4068478 (1978-01-01), Meyers
patent: 4129152 (1978-12-01), Davis
patent: 4429654 (1984-02-01), Smith

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