Patents by Inventor Scott R. Rister

Scott R. Rister 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).

  • Boat lift
    Patent number: 5485798
    Abstract: A free floating fully self contained boat lift has two floats which support a cantilever lifting device. The floats support the weight of the lift and the boat and always remain afloat. The cantilever lifting device has two hydraulic rams operated by water at household pressure. The rams raise and lower a cantilever which supports the boat hull. Once the lift is raised, it is locked in place by a locking mechanism. A pair of control valves regulate water to the rams.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: January 23, 1996
    Inventors: Ronald P. Samoian, Scott R. Rister