Patents by Inventor Barbara M. Springman

Barbara M. Springman 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).

  • Material spreader and method for using same
    Patent number: 7191965
    Abstract: A material spreader includes a belt/chain assembly. The belt is mounted within the chamber of the material spreader and the chain remains out of contact with the material during the operation of the device. A sliding barrier is mounted at the rear of the belt, and moves from a forward position adjacent the front of the spreader to a rear position adjacent the rear of the spreader. One form of the hydraulic system utilizes a sensor for built up pressure within independently driven augers. In response to this pressure build up the sliding barrier speed is reduced.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: March 20, 2007
    Assignee: Roto-Mix, LLC
    Inventors: Benjamin R. Neier, Rodney R. Neier, Gregory R. Reimer, David J. Brouwer, Luke D. Prouty, Elizabeth B. Rheingans, Jeff A. Schultz, Jason M. Schwiderski, Barbara M. Springman, Jeremy J. Waltz, David J. Gelhar, Kevin R. Wald, Todd E. Osman, James E. Shafer, Ross M. Groening
  • Material spreader and method for using same
    Patent number: 7172137
    Abstract: A material spreader includes a belt/chain assembly. The belt is mounted within the chamber of the material spreader and the chain remains out of contact with the material during the operation of the device. A sliding barrier is mounted at the rear of the belt, and moves from a forward position adjacent the front of the spreader to a rear position adjacent the rear of the spreader.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: February 6, 2007
    Assignee: Roto-Mix, LLC
    Inventors: Benjamin R. Neier, Rodney R. Neier, Gregory R. Reimer, David J. Brouwer, Luke D. Prouty, Elizabeth B. Rheingans, Jeff A. Schultz, Jason M. Schwiderski, Barbara M. Springman, Jeremy J. Waltz, David J. Gelhar, Kevin R. Wald, Todd E. Osman, James E. Shafer