Patents by Inventor John P. Mitcham

John P. Mitcham 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).

  • Rotary stepper actuator
    Patent number: 4534235
    Abstract: A pair (20) of unidirection actuators are opposingly disposed coaxially about an elongated member (1) for controllably imparting a series of stepwise rotary movements thereto. An outer race (5) disposed within a housing (2) is rotationally reciprocated as a result of the axial reciprocation of a coaxial drive member (3) under the influence of reciprocation means (12, 15, 9). An overrunning clutch (6) converts the reciprocal rotary motion of the outer race (5) into a series of uniform unidirectional stepwise angular movements.
    Type: Grant
    Filed: November 1, 1983
    Date of Patent: August 13, 1985
    Assignee: Gray Tool Company
    Inventors: John P. Mitcham, Michael A. Karr, Jr.