The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2016
Filed:
Dec. 20, 2011
Erkki Ranki, Helsinki, FI;
Tom Mattsson, Helsinki, FI;
Maximilian Vocke, Helsinki, FI;
AKER ARCTIC TECHNOLOGY OY, Helsinki, FI;
Abstract
The invention relates to a watercraft having improved characteristics for travel in ice, particularly an icebreaker, supply vessel, cargo vessel or corresponding, which watercraft has a hull, which has at the stern portion a propulsion and steering arrangement, which is mainly responsible for movement and steering of the watercraft and which includes at least one skeg, in which is located at least one propeller device. In accordance with the invention, said skegs comprise two units located on different sides of the center line of the hull. Said propeller device is located at the stern end of the skeg. In addition, the skeg has between the propeller device and the hull of the watercraft, in the longitudinal direction on the skeg, one or more thruster devices to provide a water flow mainly transverse in relation to the hull.