B - Operations – Transporting – 63 – B
Patent
B - Operations, Transporting
63
B
114/25, 114/58.2
B63B 9/06 (2006.01) B63B 35/44 (2006.01)
Patent
CA 1217389
ABSTRACT OF THE DISCLOSURE 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 may fully overlie one another, or may be disposed relatively 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. A floatable work housing is provided for vessel fabrication, the housing having a sealed opening through which the completed portion of the vessel progressively extends and is floated on a body of water to avoid a need for external supports and bearings.
446089
Fincham Eric
Universal Spiral-Weld Enterprises Inc.
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