Patents by Inventor Lars-Erik Akersten

Lars-Erik Akersten has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Propeller arrangement for a marine propulsion unit
    Patent number: 5423701
    Abstract: A double propeller arrangement for a marine propulsion unit, for example of the type which includes a so-called stern-drive. Each propeller has a hub consisting of an inner sleeve with splines for attachment to a propeller shaft, an outer sleeve with propeller blades, and an elastic bushing between the sleeves. Particular to the propeller arrangement is that the inner sleeve of respective propeller hubs is provided with an axial passage for the discharge of exhaust gases from an internal combustion engine connected to the propeller drive.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: June 13, 1995
    Assignee: AB Volvo Penta
    Inventors: Christian Rodskier, Stig Johansson, Lars-Erik Akersten