Patents by Inventor John Wallace Keller

John Wallace Keller 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).

  • Advances in watercraft hull lift, efficiency, and reduced hump drag with increased stability
    Patent number: 10647385
    Abstract: Watercraft hulls and parts thereof are disclosed which improve hydrodynamic performance for yachts, sailboards, and other craft. Drag at the transition from displacement mode to planing mode may be reduced to be the same or less than the minimum drag experienced in planing mode. Exemplary embodiments may include a bow with a center planing surface and tunnels to either side. The bow tunnels may each end in a step. At least part of the center planing surface may be cambered. A spoiler and/or interceptor may be provided at an aft end of a camber of a planing surface. For some hulls, the bow is followed by a main lift surface which is followed by a back lift surface (from stem to stern). In the back lift surface behind the main lift surface, a tunnel surface may be provided to add longitudinal stability.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: May 12, 2020
    Inventors: John H. Keller, John Wallace Keller
  • ADVANCES IN WATERCRAFT HULL LIFT, EFFICENCY, AND REDUCED HUMP DRAG WITH INCREASED STABILITY
    Publication number: 20190061879
    Abstract: Watercraft hulls and parts thereof are disclosed which improve hydrodynamic performance for yachts, sailboards, and other craft. Drag at the transition from displacement mode to planing mode may be reduced to be the same or less than the minimum drag experienced in planing mode. Exemplary embodiments may include a bow with a center planing surface and tunnels to either side. The bow tunnels may each end in a step. At least part of the center planing surface may be cambered. A spoiler and/or interceptor may be provided at an aft end of a camber of a planing surface. For some hulls, the bow is followed by a main lift surface which is followed by a back lift surface (from stem to stern). In the back lift surface behind the main lift surface, a tunnel surface may be provided to add longitudinal stability.
    Type: Application
    Filed: August 29, 2018
    Publication date: February 28, 2019
    Inventors: John H. Keller, John Wallace Keller