Patents by Inventor Dirk Holtkamp

Dirk Holtkamp 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).

  • Turbine for a hydroelectric power station
    Patent number: 8294291
    Abstract: There is provided a turbine for a hydroelectric power installation. The turbine has a rotor with a plurality of blades, with the rotor being arranged in front of a guide apparatus (in the flow direction). The pitch angle of the blades of the rotor is adapted to be variable. As the rotor is arranged in front of the guide apparatus (in the flow direction) the flow meets the rotor first and only thereafter meets the guide apparatus, thus affording optimum flow conditions for the rotor.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: October 23, 2012
    Inventors: Rolf Rohden, Dirk Holtkamp
  • Ship rudder and ship provided therewith
    Patent number: 8215255
    Abstract: A twisted rudder blade for a ship having a twist that is adapted to the configuration of the flow of the water in the region of the rudder blade if no propeller in operation is disposed in front of the rudder blades in the direction of travel of the ship.
    Type: Grant
    Filed: October 8, 2007
    Date of Patent: July 10, 2012
    Assignee: Aloys Wobben
    Inventors: Aloys Wobben, Rolf Rohden, Dirk Holtkamp
  • SHIP RUDDER AND SHIP PROVIDED THEREWITH
    Publication number: 20100186648
    Abstract: A twisted rudder blade for a ship having a twist that is adapted to the configuration of the flow of the water in the region of the rudder blade if no propeller in operation is disposed in front of the rudder blades in the direction of travel of the ship.
    Type: Application
    Filed: October 8, 2007
    Publication date: July 29, 2010
    Inventors: Aloys Wobben, Rolf Rohden, Dirk Holtkamp
  • Turbine for a Hydroelectric Power Station
    Publication number: 20090214343
    Abstract: There is provided a turbine for a hydroelectric power installation. The turbine has a rotor with a plurality of blades, with the rotor being arranged in front of a guide apparatus (in the flow direction). The pitch angle of the blades of the rotor is adapted to be variable. As the rotor is arranged in front of the guide apparatus (in the flow direction) the flow meets the rotor first and only thereafter meets the guide apparatus, thus affording optimum flow conditions for the rotor.
    Type: Application
    Filed: July 10, 2006
    Publication date: August 27, 2009
    Inventors: Rolf Rohden, Dirk Holtkamp
  • Ship
    Patent number: D536657
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: February 13, 2007
    Inventors: Rolf Rohden, Dirk Holtkamp
  • Ship
    Patent number: D580844
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 18, 2008
    Inventors: Rolf Rohden, Dirk Holtkamp, Thomas Bohlen