A self-powered icebreaker attachment for connection to a parent vessel. In the preferred embodiment, the icebreaker attachment includes a spoon-shaped bow, an ice knife positioned aft of the bow, and a propulsion system including fully rotatable Z-drives. Preferably, the icebreaker attachment is itself a flotable vessel whose propulsion system can be coordinated with the propulsion system of the parent vessel to minimize ice-breaking-related forces on the parent vessel. The propulsion systems of the two vessels can be controlled by either the crew of the parent vessel or of the icebreaker attachment vessel.
申请公布号
US5660131(A)
申请公布日期
1997.08.26
申请号
US19960644254
申请日期
1996.05.10
申请人
GULLING, DANIEL L.;CASSIDY, DAVID;RIGBY, CRAIG W.;BENTGEN, BERNARD F.
发明人
GULLING, DANIEL L.;CASSIDY, DAVID;RIGBY, CRAIG W.;BENTGEN, BERNARD F.