Patents by Inventor Randall E. Roberts

Randall E. Roberts 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).

  • Patent number: 5529320
    Abstract: A top jaw for attachment to a master jaw slidable radially in a front face of a rotary chuck toward and away from a central rotational axis of the chuck, the top jaw being suitable for alternate gripping of the inside and outside periphery of a tubular workpiece. When positioned for gripping the outside periphery of a workpiece the top jaw includes a base having a radial locating face and a second locating face directed centrally of a chuck and an insert having a radial locating surface and a transverse locating surface facing away from the chuck axis and cooperating with said base second locating face. One of the base and insert have a slot with side locating faces perpendicular to the radial locating face and the other of the base and insert have a projection with locating surfaces perpendicular to the radial locating face, each opposing an associated one of the side locating faces. A fastener connects the insert to the base.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: June 25, 1996
    Assignee: Illinois Tool Works, Inc.
    Inventors: Randall E. Roberts, Garry Paulin