Patents by Inventor David M. Hallman

David M. Hallman 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).

  • Flat belt roadway simulator with steer and/or camber adjustment and method for ascertaining rolling loss
    Patent number: 7908916
    Abstract: A testing machine includes a frame and a roadway assembly. The roadway assembly includes an endless belt and a carriage supporting the endless belt for rotation on the carriage and providing flat portion in the endless belt. The carriage is pivotally coupled to the frame to move relative to the frame about at least one axis. The carriage includes a bearing arranged to support an inner surface of the flat portion of the endless belt. A spindle carriage has a spindle arranged to support a tire and wheel assembly. The spindle carriage is movably mounted on the frame to move the spindle toward and away from the flat portion. A drive is operably coupled to the roadway assembly or the spindle. An actuator controls pivotal movement of the roadway assembly about said at least one axis. A method of ascertaining rolling loss of a tire mounted to such a machine is also provided.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: March 22, 2011
    Assignee: MTS Systems Corporation
    Inventors: Randal L. Jenniges, Jerome A. Vonderharr, David M. Hallman
  • FLAT BELT ROADWAY SIMULATOR WITH STEER AND/OR CAMBER ADJUSTMENT AND METHOD FOR ASCERTAINING ROLLING LOSS
    Publication number: 20090301183
    Abstract: A testing machine includes a frame and a roadway assembly. The roadway assembly includes an endless belt and a carriage supporting the endless belt for rotation on the carriage and providing flat portion in the endless belt. The carriage is pivotally coupled to the frame to move relative to the frame about at least one axis. The carriage includes a bearing arranged to support an inner surface of the flat portion of the endless belt. A spindle carriage has a spindle arranged to support a tire and wheel assembly. The spindle carriage is movably mounted on the frame to move the spindle toward and away from the flat portion. A drive is operably coupled to the roadway assembly or the spindle. An actuator controls pivotal movement of the roadway assembly about said at least one axis. A method of ascertaining rolling loss of a tire mounted to such a machine is also provided.
    Type: Application
    Filed: June 9, 2009
    Publication date: December 10, 2009
    Applicant: MTS Systems Corporation
    Inventors: Randal L. Jenniges, Jerome A. Vonderharr, David M. Hallman