Patents by Inventor Steven W. Wyatt

Steven W. Wyatt 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).

  • Concentric cam with check valves in the spool for a phaser
    Patent number: 8186319
    Abstract: A camshaft assembly for an internal combustion engine has a hollow outer shaft with slots along its length and an inner shaft with holes along its length. The holes on the inner shaft are aligned with the slots on the outer shaft. A first set of cam lobes are fixed to the outer shaft and a second set of cam lobes are placed on the slots of outer shaft with a clearance fit. A means fixes the second set of cam lobes to the inner shaft, while simultaneously allowing the second set of cam lobes to be a clearance fit to the outer shaft. The means fixing the second set of cam lobes to the inner shaft may be a hollow pin which is hydroformed or a rivet insert which is expanded by insertion, pulling, and removal of a threaded rod.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: May 29, 2012
    Assignee: BorgWarner Inc.
    Inventors: Christopher J. Pluta, Mark M. Wigsten, Steven W. Wyatt
  • CONCENTRIC CAM WITH CHECK VALVES IN THE SPOOL FOR A PHASER
    Publication number: 20100170458
    Abstract: A camshaft assembly for an internal combustion engine has a hollow outer shaft with slots along its length and an inner shaft with holes along its length. The holes on the inner shaft are aligned with the slots on the outer shaft. A first set of cam lobes are fixed to the outer shaft and a second set of cam lobes are placed on the slots of outer shaft with a clearance fit. A means fixes the second set of cam lobes to the inner shaft, while simultaneously allowing the second set of cam lobes to be a clearance fit to the outer shaft. The means fixing the second set of cam lobes to the inner shaft may be a hollow pin which is hydroformed or a rivet insert which is expanded by insertion, pulling, and removal of a threaded rod.
    Type: Application
    Filed: June 13, 2008
    Publication date: July 8, 2010
    Applicant: BORGWARNER INC.
    Inventors: Christopher J. Pluta, Mark M. Wigsten, Steven W. Wyatt