Patents by Inventor David E. Armstrong

David E. Armstrong 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).

  • Patent number: 4856848
    Abstract: The present invention in a preferred embodiment provides an apparatus and method of utilization there of of a fore and aft adjustable vehicle seat headrest. The headrest includes a base providing means of attachment of the headrest to said vehicle seat. A frame is connected with the base. A cushion support with an attached shaft is slidably mounted with the frame for fore and aft movement. The shaft has a series of unidirectional cam slots. A spring biases the cushion support to a rearward position with respect to the frame. Levers pivotally connected with the frame engage with the shaft slots to set the position of the headrest. Release means are provided to remove the levers and retain the levers from reengagement with the slots upon extreme forward movement of the cushion support thereby allowing the spring to return the cushion support to an extreme rearward position.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: August 15, 1989
    Assignee: General Motors Corporation
    Inventors: Terence J. O'Sullivan, George W. Mould, David E. Armstrong, Graham S. Foulkes, Michael B. Davis
  • Patent number: 4264390
    Abstract: An apparatus and method for providing permanent pipe sections in a foam-backed material that utilizes two rotating members which cooperate to form alternate ridges and valleys in the material after which the valley portions are bonded to a backing sheet so as to maintain the pipe sections in the material.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: April 28, 1981
    Assignee: General Motors Corporation
    Inventor: David E. Armstrong