Patents Assigned to Plummer's Environmental Services, LLC
  • Patent number: 10202736
    Abstract: The instant invention provides an apparatus and method for renewing and repairing a manhole including the barrel, the plenum, and the chimney, in a single installation to seal off penetration of ground water into the manhole. The manhole repair liner and method utilizes a stretchable liner material which is precut and fused together to loosely approximate the geometry of the manhole. The liner material includes an acid-resistant layer made from an elastic closed-cell polymeric material. Included and fixed to one side or surface of the elastic liner is a felt, or other loosely woven or organized fabric of fibers intended to receive and retain in place a resin, which when cured, fixes the shape of the liner in position.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: February 12, 2019
    Assignee: Plummer's Environmental Services, LLC
    Inventors: Todd Plummer, David C Van Dyken