Patents by Inventor Gregory Charleson

Gregory Charleson 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).

  • Fitting to connect a polyvinyl chloride pipe and a polyethylene pipe
    Patent number: 7980602
    Abstract: A pipe fitting facilitates joining of a high-density polyethylene (HDPE) pipe to a polyvinyl chloride (PVC) pipe. The fitting has a HDPE body. A ring-shaped PVC insert is positioned within an inner surface of the body at one opening of the body. An inner surface of the PVC insert is threaded so that a PVC pipe that has a threaded outer surface can be screwed into the PVC insert. A compression ring is installed over the outer surface of a portion of the body that surrounds the PVC insert. Prior to installation, the inner diameter of the compression ring is smaller than the outer diameter of the portion of the body that surrounds the PVC insert. For this reason, when the compression ring is installed, the compression ring compresses the portion of the body that surrounds the PVC insert, holding the PVC insert within the body.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: July 19, 2011
    Assignee: Poly-Cam, Inc.
    Inventors: Charles Charlson, Gregory Charleson