Patents by Inventor Vaughn Johnston

Vaughn Johnston 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).

  • Stripper rubber on a steel core with an integral sealing gasket
    Publication number: 20070209841
    Abstract: An elongated stripper rubber having a converging internal passage extending to a neck portion elastically expanded to snugly receive a drill string. The elongated stripper rubber is adhered to a steel core having a truncated conical load bearing surface containing an annular gasket cavity containing a truncated conical gasket. The volume of elastic material protruding from the truncated conical load bearing surface can be compressed into the gasket cavity between the steel core and a truncated conical annulus in an outer housing.
    Type: Application
    Filed: March 7, 2006
    Publication date: September 13, 2007
    Inventor: Vaughn Johnston