Patents by Inventor Randy J. McDonald

Randy J. McDonald 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).

  • Dual tensioner system for balance shaft drive
    Patent number: 6106423
    Abstract: A chain tensioning system includes a pair of tensioners located one on each side of a driving sprocket, such as a crankshaft sprocket, between the driving sprocket and each of two driven sprockets, such as balance shaft sprockets. The dual tensioning system provides a tensioner to absorb torsional vibrations from the driving shaft in each of the two relative rotational directions of the driving shaft.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: August 22, 2000
    Assignee: BorgWarner Inc.
    Inventors: David C. White, Kevin B. Todd, Randy J. McDonald, Michael Marsh