Patents by Inventor Mark W. Hillenburg

Mark W. Hillenburg 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).

  • Chuck with movable jaw halves
    Patent number: 4946176
    Abstract: A chuck comprises a scroll to simultaneously move a plurality of chuck jaw assemblies radially toward and away from a work piece. The chuck jaw assemblies include an inner chuck jaw part in engagement with the scroll and an outer chuck jaw part movable relative to the inner chuck jaw part radially toward and away from the axis. A ball detent mechanism returns to return the outer chuck jaw part to a predetermined or centered location after one work piece has been machined in preparation for work on the next work piece.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: August 7, 1990
    Inventor: Mark W. Hillenburg