Title:
ICE BREAKER UTILIZING ARCHIMEDIAN SCREW
Document Type and Number:
Japanese Patent JPS57104488
Kind Code:
A
Abstract:
PURPOSE: To perform ice breaking efficiently by arranging a pair of right and left Archimedian screws directly under the bow in the longitudinal direction of the ship, and drive the bow on the ice-plate applying a part of the ship's weight downwards through the screws.
CONSTITUTION: A pair of right and left Archimedian screws 1 are arranged directly under the bow 2 in the longitudinal direction of the ship, being rotatably driven unrestrictedly. The end of the screw 1 is projected up on the water line so that the blade 8 prepared around it can be brought in contact with the ice plate 3. When the said screws are rotated, the both blades 8 ride on the ice plate 3, and the ice plate will be broken when it cannot bear the weight.
Inventors:
OOSHIMA MASANAO
TAKAMOTO MIKINAGA
NAKAMURA MASATOSHI
TAKAMOTO MIKINAGA
NAKAMURA MASATOSHI
Application Number:
JP17757780A
Publication Date:
June 29, 1982
Filing Date:
December 16, 1980
Export Citation:
Assignee:
MITSUI SHIPBUILDING ENG
International Classes:
B63B35/08; B63B35/12; (IPC1-7): B63B35/12