Patents by Inventor Gerd Elger

Gerd Elger 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).

  • Waterjet propulsion unit for water craft with control elements for changing the direction of thrust of the waterjet
    Patent number: 5649843
    Abstract: Water jet propulsion unit for watercraft having a pump and stators arranged upstream and downstream of the pump for eliminating turbulence in the entering water and in the water jet generated by the pump, having coaxially arranged nozzles which are associated with the respective stator and are supported so as to be displaceable axially independently of one another, and having a switchable gear unit for driving the pump in the clockwise or counterclockwise direction in order to change the direction of motion of the watercraft, the water jet propulsion unit being supported at the watercraft so as to be swivelable by .+-.90.degree. approximately vertically to the axis of rotation of the pump rotor.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: July 22, 1997
    Inventor: Gerd Elger
  • Linear coupling
    Patent number: 4710052
    Abstract: A linear coupling device is disclosed for a play-free, safe and dust-protected transmission of large tractive, alternating or radial forces by means of coupling members comprising of fir tree-shaped cones. The coupling members are secured together in combination with corresponding connection members comprising of a plurality of segments and a locking member comprising of a sliding coupling sleeve.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: December 1, 1987
    Inventor: Gerd Elger