Navigation in ice covered waterways

Details Navigation in ice covered waterways Navigation in ice covered waterways

1979-12-17

1982-04-27

Hill, Ralph J.

Ships

Ice breakers

B63B 3508

Patent

active

043264760

ABSTRACT:
A navigation channel is made in the ice covering the surface of a waterway by propelling a vessel so that its bow breaks the ice to form a channel having a width of the beam of the ship and an auxiliary channel is similarly formed at each side of the ship in rear of its bow to provide leeway for the ship to turn. As the ship is turned, the auxiliary channel is enlarged by breaking the ice on the edge of the auxiliary channel toward the stern of the ship to give it greater leeway to turn. The auxiliary channel may be broken out by fin means projecting from the side of the ship effective to exert forward, upward and outward force against the ice blanket to break pieces from it.

REFERENCES:
patent: 3521591 (1970-07-01), Alexander
patent: 3636904 (1972-01-01), Blanchet
patent: 4208977 (1980-06-01), Jahns et al.

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