Patents by Inventor Ronald S. Friedman

Ronald S. Friedman 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).

  • Hollow balance shaft
    Patent number: 5483932
    Abstract: A balance shaft for an automobile engine is disclosed. The balance shaft has a hollow tubular body and a pair of end plug members permanently secured thereto, as by welding. Notches or bob weights either in line or 180.degree. out of phase are provided in the two end plug members. The balance shaft is rotated at twice the crankshaft speed in order to balance second order forces.
    Type: Grant
    Filed: April 21, 1994
    Date of Patent: January 16, 1996
    Assignee: Simpson Industries, Inc.
    Inventors: Ronald S. Friedman, William C. Sisco