Patents by Inventor Dennis P Townsend

Dennis P Townsend 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).

  • Helical and spur gear drive with double crowned pinion tooth surfaces and conjugated gear tooth surfaces
    Patent number: 6205879
    Abstract: Helical or spur gear drive comprising a driven gear and driving gear wherein the driving gear has double crowned teeth defined as (i) an envelope to a family of surfaces generated by a skew or straight rack-cutter having a parabolic tooth profile in normal section and then (ii) as an envelope to a family of tool surfaces that are generated while the tool performs a plunging motion with respect to the driving gear in the direction of the shortest distance between the axes of rotation of the tool and the driving gear and tool plunging motion is varied by a parabolic function, whose variable is displacement of the tool in a direction parallel to the rotational axis of the driving gear. The driven gear has a tooth surface defined as the envelope to a family of surfaces generated by a rack-cutter which surface is parabolic cylinder or a plane.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: March 27, 2001
    Assignees: Visteon Global Technologies, Inc., The Board of Trustees of the University of Illinois
    Inventors: Faydor L. Litvin, Pin Hao Feng, Sergey A Lagutin, Dennis P Townsend, Thomas M Sep