Kvaerner Masa-yards Oy

Abb Azipod Oy

Torsten Heideman

Erkki Ranki

Risto Kurimo

Matti Arpiainen

Tom Mattson

Magnus Backstrom

Isko Kuha

A relatively wide vessel is assisted through an ice field by an icebreaker having a relatively narrow hull. The icebreaker includes two steerable propulsion mechanisms at the opposite ends respectively of the hull, and the propulsion mechanisms are used to propel the icebreaker through the ice field in a direction at a substantial angle to its keel line, thereby opening in one pass of the icebreaker a passage having a width substantially greater than the waterline width of the icebreaker.

Icebreaking method and icebreaker

A main propulsion device of a ship includes a turnable underwater propeller pod, a screw propeller journalled in the propeller pod at one end thereof and a substantially vertical turning shaft journalled at its upper end portion in the ship3 s hull and attached at its lower end portion to the propeller pod. The upper end portion of the turning shaft is offset relative to the lower end portion of the turning shaft perpendicular to the propeller plane toward the propeller.

Propulsion device

Growing community of inventors

Grankulla, Finland

Torsten Heideman