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:
Mar. 20, 2007
Filed:
Feb. 17, 2003
Adam Grzonka, Gdansk, PL;
Björn A. Henriksen, Oslo, NO;
Jan Kanar, Gdansk, PL;
Ryszard Lech, Gdansk, PL;
Kay Tigges, Harsefeld, DE;
Adam Grzonka, Gdansk, PL;
Björn A. Henriksen, Oslo, NO;
Jan Kanar, Gdansk, PL;
Ryszard Lech, Gdansk, PL;
Kay Tigges, Harsefeld, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A seagoing boat is driven by at least two rudder propellers and has a hull for transporting cargo or passengers. The rudder propellers are preferably embodied as electric rudder propellers. The hull has an approximately rectangular cross section amidships, to which flow-directing bodies are connected. A flow channel is configured between the skegs, the flow channel being embodied in a wedge-shaped manner with a continuous, preferably slightly bent enlargement in the direction of the bottom astern. The side walls of the flow channel are configured at least in part as even surfaces and taper off in the form of fin-shaped teeth having water displacement volume. The streaming effect of the flow channel generates a low boat resistance. The influence of the flow channel on the wake has a positive effect on the propulsion efficiency.