Patents by Inventor Cullen B. Crawford, deceased

Cullen B. Crawford, deceased 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).

  • Tube coupling
    Patent number: 5308122
    Abstract: A tube coupling is disclosed which electrically insulates the tube from the coupling. A metallic nut and body interact with a non-metallic coupling to constrict the non-metallic coupling about the tube end providing multiple seals and seats while avoiding metal-to-metal contact between the tube and either the nut or body. Multiple cooperating cam surfaces are provided on the body and non-metallic coupling to achieve a tube coupling stronger than, yet electrically insulated from, the tube.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: May 3, 1994
    Assignee: Tylok International, Inc.
    Inventors: Cullen B. Crawford, deceased, Carole C. Hahl, executrix