Patents by Inventor Robert F. Derrien

Robert F. Derrien 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).

  • Machine tools having a rotating spindle such as milling machines
    Patent number: 4084482
    Abstract: A machine tool comprising a rotatable spindle, at least one fly-wheel, at least one first roller carried by the spindle and at least one further roller for driving the fly-wheel, wherein the at least one further roller can be engaged with and disengaged from the at least one first roller, so that the fly-wheel can be optionally rotated with the spindle without any play.
    Type: Grant
    Filed: March 16, 1976
    Date of Patent: April 18, 1978
    Assignee: Societe Hure S A
    Inventor: Robert F. Derrien