Patents by Inventor Mike T. Zimmer

Mike T. Zimmer 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).

  • Electronic valve actuator
    Patent number: 4845416
    Abstract: Apparatus is provided for mechanically actuating a valve stem in response to signals generated by an electronic control. A signal means and a sensor means send signals to the electronic control in response to a desired valve stem position and a sensed valve stem position, respectively. The electronic control formulates an error signal if the sensed position is not the desired position. A motor receives a control signal in response to the error signal and drives a linkage for moving the valve stem to the desired position.
    Type: Grant
    Filed: February 13, 1987
    Date of Patent: July 4, 1989
    Assignee: Caterpillar Inc.
    Inventors: Rolland D. Scholl, Mike T. Zimmer, William E. Allen