Patents by Inventor David D. Bryant

David D. Bryant 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: 6941613
    Abstract: A pipe cleaning vacuum sealing apparatus includes an intra piping sealing frustum. The frustum is generally shaped as a frustum of a circular cone with an interior and exterior surface. The interior surface is adapted to releasably receive a plurality of various vacuum suction sources. The exterior surface of the frustum is adapted to be releasably received by a plurality of configurations of pipe openings. Alternatively, the pipe cleaning vacuum sealing apparatus includes an extra piping system sealing boot. The sealing boot releasably seals at the surface surrounding a pipe and is adapted to releasably receive a plurality of various vacuum suction sources. Embodiments of the pipe cleaning vacuum sealing apparatuses include a plurality of annular engaging rings to enhance sealing, fixed and telescoping suction tubes, and varying embodiments of separation and retainage chambers further including separation and retainage chambers with at least one ingress port.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: September 13, 2005
    Assignee: Trap Vac, LLC
    Inventor: David D. Bryant
  • Publication number: 20030226229
    Abstract: A pipe cleaning vacuum sealing apparatus includes an intra piping sealing frustum. The frustum is generally shaped as a frustum of a circular cone with an interior and exterior surface. The interior surface is adapted to releasably receive a plurality of various vacuum suction sources. The exterior surface of the frustum is adapted to be releasably received by a plurality of configurations of pipe openings.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 11, 2003
    Inventor: David D. Bryant