Patent 7971545 was granted and assigned to SkySails on July, 2011 by the United States Patent and Trademark Office.
The invention relates to a water craft comprising a kite element, which is connected to the water craft by a traction cable. The water craft is characterized in that the kite element is equipped with adjusting devices and an energy generation unit, which delivers energy when the tractive force that is exerted on the traction cable is modified.