Patents by Inventor Dennis Robert Allen

Dennis Robert Allen 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).

  • Protective enclosure for watercraft hulls
    Patent number: 6568343
    Abstract: Apparatus for protecting a hull of a watercraft floating in a body of water includes a waterproof shroud of flexible sheet material suspended from a collar which is floatable in the body of water. The collar includes a buoyant forward section and a controllably buoyant rearward section pivotally connected to the rearward section for pivotal movement between a horizontal floating position and a sunken position. The rearward section includes an interior chamber and an opening or channel that extends from the chamber to provide a water flow path between the chamber and the surrounding body of water. Controllably, the chamber may be filled either with air from an external source of pressurized air or may be allowed to flood through the channel with water from the surrounding body of water. When the chamber is flooded, the rearward section is non-buoyant and pivots to its sunken position. When the chamber is filled with sufficient air, the rearward section becomes buoyant and pivots to its floating position.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: May 27, 2003
    Inventors: Grant Roy Hill, Dennis Robert Allen
  • PROTECTIVE ENCLOSURE FOR WATERCRAFT HULLS
    Publication number: 20030084834
    Abstract: Apparatus for protecting a hull of a watercraft floating in a body of water includes a waterproof shroud of flexible sheet material suspended from a collar which is floatable in the body of water. The collar includes a buoyant forward section and a controllably buoyant rearward section pivotally connected to the rearward section for pivotal movement between a horizontal floating position and a sunken position. The rearward section includes an interior chamber and an opening or channel that extends from the chamber to provide a water flow path between the chamber and the surrounding body of water. Controllably, the chamber may be filled either with air from an external source of pressurized air or may be allowed to flood through the channel with water from the surrounding body of water. When the chamber is flooded, the rearward section is non-buoyant and pivots to its sunken position. When the chamber is filled with sufficient air, the rearward section becomes buoyant and pivots to its floating position.
    Type: Application
    Filed: November 5, 2001
    Publication date: May 8, 2003
    Inventors: Grant Roy Hill, Dennis Robert Allen