Patents by Inventor Robert Wayne Nelson

Robert Wayne Nelson 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).

  • Vacuum-type circuit interrupter with means for protecting its bellows against mechanical damage
    Patent number: 4071727
    Abstract: A guide sleeve for the movable contact rod of a vacuum-type circuit interrupter fits within the usual tubular bellows of the interrupter. The bellows has some of its annular convolutions located axially-inwardly of the axially-inner end of the guide sleeve. A coating of self-lubricating plastic material is provided on the outer peripheral surface of the guide sleeve and on its inner end surface. This coating is sufficiently close to the internal surface of the bellows as to be contacted by said convolutions when the contact rod is axially moved during operation of the interrupter. The lubricating properties of the coating reduce friction between said convolutions and said coated sleeve.
    Type: Grant
    Filed: May 6, 1976
    Date of Patent: January 31, 1978
    Assignee: General Electric Company
    Inventors: Donald Wayne Crouch, Robert Wayne Nelson