Patents by Inventor William Ratlieff

William Ratlieff 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).

  • Patent number: 10501150
    Abstract: Pontoon hulls for providing lower friction surfaces on the hulls to increase the efficiency of pontoon boats moving through the water. The inner side walls between the pontoons can be provided with a plurality of longitudinal vents. The vents can have open ends facing the stern and opposite closed ends facing the bow. As the water craft moves forward, a bubbling effect can occur in low pressure zones about the stern facing open ends of the vents to reduce the water surfaces in contact with the pontoon hull surfaces. A plurality of open rear ends of the vents can be arranged in series and in parallel on left inner sides of the left pontoon, and on right inner sides of the right pontoon.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: December 10, 2019
    Inventor: William Ratlieff
  • Patent number: 10173751
    Abstract: Pontoon hulls, devices, systems and methods for providing lower friction surfaces on the hulls to increase the efficiency of motorized pontoon boats moving through the water. The inner side walls and the tunnel ceiling surface between the pontoons in a motorized pontoon boat can be provided with a plurality of longitudinal vent channels in a U shaped configuration. The vent channels can have open ends facing the rear end (stern) of the water craft and opposite closed ends facing the forward end (bow) of the water craft. As the water craft moves forward, a bubbling effect can occur in low pressure zones about the rear (stern) facing open ends of the plurality of vents to reduce the water surfaces in contact with the pontoon hull surfaces.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: January 8, 2019
    Inventor: William Ratlieff