Ice cutting and breaking vessel

Details Ice cutting and breaking vessel Ice cutting and breaking vessel

1979-08-17

1981-07-07

Blix, Trygve M.

Ships

Ice breakers

Cutters

299 26, B63B 3508

Patent

active

042768454

ABSTRACT:
An ice cutting and breaking vessel is disclosed for providing a shipping channel through an ice layer. The bow of the vessel is provided with a plurality of reciprocating cutting blades for cutting the ice into slabs. The slabs of ice slide under the bow and are pushed under the surrounding ice layer by a wedge-shaped prow depending from the bow and by water discharged laterally from the prow. The vessel is also provided with an emergency ballast tank, located above the water line, which can be quickly emptied through large ports. A pair of grapnels with attached cables may also be provided which are shot from the vessel. When the grapnel hits the ice layer, it pierces the ice and becomes wedged under the ice layer. Using the cables to pull on, the vessel can then haul itself toward the grapnels.

REFERENCES:
patent: 529379 (1894-11-01), Hallett
patent: 3530814 (1970-09-01), Rastorgueu
patent: 3670681 (1972-06-01), Upchurch
patent: 3762354 (1973-10-01), Waas
patent: 3850125 (1974-11-01), Anders
patent: 3886882 (1975-06-01), Thornburg
patent: 3985091 (1976-10-01), Waas
patent: 4067282 (1978-01-01), Guinn
patent: 4198917 (1980-04-01), Oshima

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