Patents by Inventor Michael C. Keiper

Michael C. Keiper 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: 7513023
    Abstract: Broken conduit is repaired by enlarging the inner diameter at the broken end portion to provide a socket for receiving a coupling that has a male end portion with a reduced radial wall thickness and is configured so that the external diameter of the male end portion is closely received in the socket while the inner diameter thereof corresponds to the original inner diameter of the conduit.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: April 7, 2009
    Inventor: Michael C. Keiper
  • Patent number: 7513719
    Abstract: A reaming tool for reaming a socket in a broken end portion of a cylindrical conduit enlarges the internal diameter of the broken end portion to provide a socket for receiving a male end portion on a repair coupling. The reaming tool is guided by the inner diameter of the conduit while reaming out the broken end portion to a socket diameter that is about midway between the original internal and outer diameters of the conduit.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: April 7, 2009
    Inventor: Michael C. Keiper
  • Patent number: 7438324
    Abstract: A broken conduit end portion is repaired by reducing its radial wall thickness and attaching thereto a repair coupling that is configured to provide an internal passage therethrough that is not smaller than the internal passages in the broken conduit end portion and in a second conduit that is attached to the repair coupling.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: October 21, 2008
    Inventor: Michael C. Keiper
  • Publication number: 20040261874
    Abstract: A method and component for repairing broken conduit ends extending from concrete foundations is disclosed. The method and component for repairing broken conduit ends of this invention eliminates the need to break up the concrete foundation around the broken conduit end. The specialized repair components include a reaming bit for milling out and turning down the inside wall of the broken conduit end and repair coupling for joining a new section of conduit to the broken conduit end. The reaming bit is designed to be used with any conventional handheld power drill. The reaming bit mills out the inside of the broken conduit end so that the repair coupling can be inserted into the broken conduit end. With the coupling fitted into the broken conduit end, a new section of conduit can be connected completing the repair.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Inventor: Michael C. Keiper