Patents by Inventor Milford R. Derrick

Milford R. Derrick 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).

  • Non-minimum phase linear controller for hydraulic mechanisms
    Patent number: 3935523
    Abstract: The disclosure relates to a non-minimum phase linear controller which uses positive servomechanism rate feedback to control hydraulic mechanisms. The disclosure also relates to a controller comprising, in combination, a conventional linear controller and a non-minimum phase linear controller, the outputs of the combined controllers being weighted in a predetermined ratio to provide a single output control signal.
    Type: Grant
    Filed: April 22, 1974
    Date of Patent: January 27, 1976
    Assignee: Adaptronics, Inc.
    Inventors: Dixon Cleveland, Milford R. Derrick