Patents by Inventor Norman E. Charlson

Norman E. Charlson 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: 5211429
    Abstract: A pipe junction device is disclosed for mounting on an exterior surface of a resilient pipe, such as polyethylene pipe. The pipe junction device includes a generally cylindrical sleeve member having an inner surface including at least one barb, preferably two, projecting inwardly and extending circumferentially around the inner surface. The inner diameter of the sleeve at the barbs is less than a diameter of the exterior surface of said pipe in the uncompressed state. The sleeve slidably receives the pipe wherein the resilient properties of the pipe expand the exterior surface of the pipe in the regions adjacent the region at the barbs to define diameters greater than the diameter of the pipe at the region at the barbs to restrict sliding movement of the sleeve member with respect to the pipe to securely mounting the sleeve to the pipe. An intermediate trough surface portion is disposed between two barbs having multiple levels.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: May 18, 1993
    Inventors: Norman E. Charlson, Gregory D. Charlson, Giancarlo Dallai