Patents by Inventor Donald R. Schumaker

Donald R. Schumaker 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).

  • Vehicle cab mounting arrangement
    Patent number: 3966009
    Abstract: A vehicle includes a cab mounted on a frame capable of vibratory, beam-like bending about at least one nodal point. To minimize the fore and aft motion of the cab caused by the vibratory bending of the frame and by pitching of the vehicle, while reducing vertical motion of the cab, one portion of the cab is resiliently mounted on the frame at or near a nodal point. Preferably, the resilient mount includes at least one pneumatic spring. Another portion of the cab is secured to the frame by a pivotal support that transmits to the cab vibratory movement of the frame at the support.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: June 29, 1976
    Assignee: Mack Trucks, Inc.
    Inventors: Leslie A. Meacock, II, Donald R. Schumaker, Robert F. Zalokar