Snorkel mast for a semi-submersible vehicle

Details Snorkel mast for a semi-submersible vehicle Snorkel mast for a semi-submersible vehicle

1984-12-14

1986-09-16

Blix, Trygve M.

Ships

Submersible device

Superstructure

114212, 137434, B63G 804

Patent

active

046115510

ABSTRACT:
There is described a snorkel mast for a submersible vehicle. The mast terminates at the upper end in an inverted U-shaped snorkel head pipe section closed by a butterfly valve. The butterfly valve is operated by a bell-crank lever having a float at one end and a water impact flap at the other. Operation of the bell-crank lever by water level action against the float or by water impact action on the flap if a wave washes over the top of the snorkel mast acts to close the butterfly valve. The mast carries a fairing which comprises a number of fairing elements of airfoil cross-section, vertically spaced on the mast so as to be freely rotatable thereon in water lubricated bearings. The segmented fairings on the snorkel mast maintains hydrodynamic stability during high speed turns.

REFERENCES:
patent: 2413350 (1946-12-01), Helmore
patent: 2941492 (1960-06-01), Wilcoxon
patent: 2949089 (1960-08-01), Reid
patent: 2949090 (1960-08-01), Gerber
patent: 3407779 (1968-10-01), Satterthwaite
Dolphin: On Trial; K. Malone; Lighthouse: Edition No. 28; Nov., 1983.
Design and Development of a Diesel Powered Semi-Submersible ROV; James S. Ferguson et al.; Mar., 1984.

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