Patents by Inventor Tiffanie E. Coe

Tiffanie E. Coe 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).

  • Internal mandrel and method
    Patent number: 8631671
    Abstract: A method and system for forming a part from a workpiece including a hollow portion, using a mandrel and a conventional press such as a stamping press includes filling the hollow portion of the workpiece with a mandrel material and transforming the mandrel material to form a mandrel. The mandrel material is removable from the formed part and may be recycled to form a mandrel for another workpiece.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: January 21, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Paul E. Krajewski, Michael H. Lovell, Tiffanie E. Coe, Terry A. Kent, Kevin R. Marks, William R. Rodgers, Howard William Cox, William Parker, Darrell W. Rebman, John Collins
  • INTERNAL MANDREL AND METHOD
    Publication number: 20120260709
    Abstract: A method and system for forming a part from a workpiece including a hollow portion, using a mandrel and a conventional press such as a stamping press includes filling the hollow portion of the workpiece with a mandrel material and transforming the mandrel material to form a mandrel. The mandrel material is removable from the formed part and may be recycled to form a mandrel for another workpiece.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 18, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Paul E. Krajewski, Michael H. Lovell, Tiffanie E. Coe, Terry A. Kent, Kevin R. Marks, William R. Rodgers, Howard William Cox, William Parker, Darrell W. Rebman, John Collins
  • Two mode hydroform seal apparatus and method
    Patent number: 7685856
    Abstract: A hydroforming seal and method includes a nozzle having both a radially expandable O-ring seal and a conical tapered surface for separately sealing with the bore of the tube. The O-ring seal is expanded to seal the tube and pressurized fluid is added sufficient to support the interior of the tube while the dies are closed so that the tube is thereby bent and forced into the die cavity without collapse or injury to the tube. The O-ring seal is then contracted to a non-sealing position and the conical tapered surface provides metal-to-metal sealing while the higher hydroforming pressure is applied to expand the tube. The nozzle also has a radial shoulder that engages the end face of the tube so that advance of the nozzle feeds the tube into the die.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: March 30, 2010
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Mike M. Ghiran, Spyros P. Mellas, Tiffanie E. Coe, Kevin R. Marks