Patents by Inventor Charles W. Shultz

Charles W. Shultz 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).

  • Coupling for plain end pipe
    Patent number: 6302450
    Abstract: A segmented pipe coupling is disclosed which includes a successive series of circumferentially discontinuous teeth which extend radially inward along the interior arcuate surface of the coupling and are intended to securely engage a plain ended pipe without cutting into the pipe exterior. The teeth are preferably formed by superimposed multi-lead right hand and left hand threads along the inner arcuate portion of the segmented pipe coupling.
    Type: Grant
    Filed: October 22, 1998
    Date of Patent: October 16, 2001
    Assignee: Victaulic Company of America
    Inventors: Douglas R. Dole, Charles W. Shultz