Patents by Inventor Ronald E. DiFrancia

Ronald E. DiFrancia 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).

  • O-ring seal flat face fitting
    Publication number: 20020135136
    Abstract: The present invention is an improved O-ring seal flat face fitting of the type having a male portion including an O-ring, and a female portion having a tube with an inside diameter, an extended peripheral limit having a diameter corresponding to said inside diameter, a nut, and a joinder portion. It is improved by the joinder portion including a void having a portion extending radially beyond the extended peripheral limit.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 26, 2002
    Inventors: Michael A. Cottrell, Ronald E. DiFrancia