Patents by Inventor Thomas G. Elphick

Thomas G. Elphick 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).

  • Camshaft phasing drive with wedge actuators
    Patent number: 5033327
    Abstract: A phase adjuster for engine camshafts and the like includes in a preferred embodiment a sprocket driving a camshaft attached hub through paired wedge packs that transfer torque and maintain a lash free connection. A plunger actuated by engine oil pressure and coating drive springs axially move alternate active wedges to oppositely vary the arcuate lengths of the wedge packs and thereby change the phase angle between the sprocket and camshaft. A three way valve shuts off pressure oil flow except when needed to advance the plunger, thus minimizing oil flow requirements.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: July 23, 1991
    Assignee: General Motors Corporation
    Inventors: Thomas H. Lichti, Ronald A. Waydelis, Michael J. Niemiec, Mark A. Shost, Kenneth A. Kovacevich, Thomas G. Elphick
  • Fuel rail assembly
    Patent number: 4510909
    Abstract: A fuel rail assembly for a V engine has a pair of fuel rails connected by crossover and discharge conduits. The crossover and discharge conduits are secured to the fuel rails in a manner which permits relative motion between the fuel rails without loss of fuel from the fuel rail-conduit intersection.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: April 16, 1985
    Assignee: General Motors Corporation
    Inventors: Thomas G. Elphick, Edgar S. Eshleman, Martin J. Field