Patents by Inventor Terrence Christensen

Terrence Christensen 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).

  • Radial lip seal
    Patent number: 7004471
    Abstract: A radial lip seal including an annular support with a radially extending portion having an inner periphery. An annular seal lip formed of elastomeric material such as polytetrafluoroethylene is connected to the inner periphery. The lip has an inner side adapted to seal a circumferential surface of a shaft and an outer side. The outer side of the lip has a plurality of grooves or protrusions to vary the diameter of the lip. The varied diameter creates a substantial leak between the outer side of the lip and the circumferential surface. The leak created is sufficient to be detected by a low-pressure air test.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: February 28, 2006
    Assignee: General Motors Corporation
    Inventors: Steven G. Bryde, Terrence Christensen, Marcos Basile Teixeira, Marcio Caldas Camargo Lima, Antonio Rangel Machado, Marcos Castanho Santanna
  • Radial lip seal
    Publication number: 20050134003
    Abstract: A radial lip seal including an annular support with a radially extending portion having an inner periphery. An annular seal lip formed of elastomeric material such as polytetrafluoroethylene is connected to the inner periphery. The lip has an inner side adapted to seal a circumferential surface of a shaft and an outer side. The outer side of the lip has a plurality of grooves or protrusions to vary the diameter of the lip. The varied diameter creates a substantial leak between the outer side of the lip and the circumferential surface. The leak created is sufficient to be detected by a low-pressure air test.
    Type: Application
    Filed: December 17, 2003
    Publication date: June 23, 2005
    Inventors: Steven Bryde, Terrence Christensen, Marcos Teixeira, Marcio Camargo Lima, Antonio Machado, Marcos Santanna