Patents by Inventor Kerry D. Severs

Kerry D. Severs 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).

  • Apparatus for installing a flexible cured in place lateral seal in an existing main pipeline
    Patent number: 6520719
    Abstract: An apparatus for installing a cured in place lateral seal in an existing main pipeline wherein the lateral seal includes a brim portion bonded to a short tubular portion. The apparatus includes a flexible bladder mounted on a cylindrical housing with the bladder having a recess with an inflatable arm which can be tucked within the housing for receiving the tubular portion of the seal with the brim portion along the outer portion of the bladder. The cartridge is removably mountable on a sled or robot device with positioning motors for positioning the seal at the opening of the lateral pipeline. The use of replaceable bladder cartridges allows an operator to load a second new seal on a cartridge a first seal on a bladder cartridge mounted on the sled is being cured in place.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: February 18, 2003
    Assignee: Insituform (Netherlands) B.V.
    Inventors: John Tweedie, Kerry D. Severs
  • Method of installation of a flexible cured in place lateral seal in an existing main pipeline
    Patent number: 6068725
    Abstract: A method for installing and curing a cured in place lateral seal at the connection between a main pipeline and a lateral connection is provided. The method includes placing a resin impregnated lateral seal in the form of a top hat with a brim portion and short tubular portion onto a cylindrical flexible bladder cartridge having a tubular recess for receiving the tubular portion of the seal with the brim portion along the outer portion of the bladder, placing an assembly carrying the bladder to the location of the lateral and pressing the brim portion of the seal against the interior of the main pipeline and everting the tubular portion out of the tubular recess into a portion of the lateral to form the seal. Radiant energy, preferably, light is then applied to the resin to initiate the cure, the bladder is cooled and then deflated.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: May 30, 2000
    Assignee: Insituform (Netherlands) B.V.
    Inventors: John Tweedie, Philip M. Smith, Jeff P. Wells, Kerry D. Severs, Kevin P. Murray
  • Apparatus for installing a flexible cured in place lateral seal in an existing main pipeline
    Patent number: 6029726
    Abstract: An apparatus for installing a cured in place lateral seal in an existing main pipeline wherein the lateral seal includes a brim portion bonded to a short tubular portion is provided. The apparatus includes a flexible bladder mounted on a cylindrical housing with the bladder having a recess with an inflatable arm which can be tucked within the housing for receiving the tubular portion of the seal with the brim portion along the outer portion of the bladder. The cartridge is removably mountable on a sled or robot device with positioning motors for positioning the seal at the opening of the lateral pipeline. The use of replaceable bladder cartridges allows an operator to load a second new seal on a cartridge a first seal on a bladder cartridge mounted on the sled is being cured in place.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: February 29, 2000
    Assignee: Insituform (Netherlands) B.V.
    Inventors: John Tweedie, Philip M. Smith, Jeff P. Wells, Kerry D. Severs, Kevin P. Murray