Patents by Inventor Ralph Derr, Jr.

Ralph Derr, Jr. 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).

  • Cam activated planetary turning machine
    Patent number: 4423991
    Abstract: An apparatus for turning or milling a workpiece is provided. The apparatus includes a first sleeve having an eccentric bore and a second sleeve positioned within this bore. The second sleeve also has an eccentric bore within which a tool mandrel or spindle is rotatably positioned. The sleeves are rotatable both as a unit and with respect to each other. When rotated with respect to each other, the axis of the mandrel may be moved off center to permit the turning or milling of the workpiece.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: January 3, 1984
    Assignee: Gulf & Western Manufacturing Company
    Inventor: Ralph Derr, Jr.