Patents by Inventor David R. Hedrick

David R. Hedrick 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).

  • Patent number: 5755387
    Abstract: A spreader assembly for use with a dump-truck vehicle has a conventional spinner unit, an outer trough member mounted on the vehicle body with an outlet opening over the spinner unit, an inner trough member contained within the outer trough member and positioned with a discharge chute projected through the outer trough member outlet opening, and a hydraulic motor connected to the inner trough member for reciprocating the inner trough member with respect to the outer trough member to move materials to the spinner unit.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: May 26, 1998
    Inventor: David R. Hedrick