Patents by Inventor Dwight B. Whitfield

Dwight B. Whitfield 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).

  • Electric power actuator
    Patent number: 4175248
    Abstract: An electrically driven linear actuator has a housing with a plurality of bus bars mounted within the housing. An electric motor is positioned in the housing and is in driving relationship with a linearly movable actuator member. The actuator member carries a contact which moves along and in contact with the bus bars. There is an electrical connection between the bus bars and the motor with the flow of current through this connection being controlled by the movable contact.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: November 20, 1979
    Assignee: Lake Center Industries
    Inventors: Dwight B. Whitfield, Kenneth K. Ferryman, Jr.