Patents by Inventor Mark Allen Stamback

Mark Allen Stamback 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).

  • Heavy-duty valve stem seal assembly
    Patent number: 6450143
    Abstract: An integral valve stem seal retainer and spring seat for a valve seal subassembly is disclosed having lower and upper portions. An annular sealing member engages the upper portions of the metal retainer and an annular flange extends radially outwardly of the lower portion of the retainer to engage at least one coil of a valve spring. The annular sealing member further includes upper and lower portions, wherein the upper portion engages an outer surface of a valve stem while the lower portion engages a transitional surface of a valve guide.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: September 17, 2002
    Assignee: Dana Corporation
    Inventors: Timothy Alan Hegemier, Mark Allen Stamback
  • Heavy-duty valve stem seal assembly
    Patent number: 6244235
    Abstract: An integral valve stem seal retainer and spring seat for a valve seal subassembly is disclosed having lower, intermediate and upper portions. An annular sealing member is bonded to the intermediate and upper portions of the metal retainer and an annular flange extends radially outwardly of the lower portion of the retainer to engage at least one coil of a valve spring. The annular sealing member further includes upper and lower portions, wherein the upper portion engages an outer surface of a valve stem while the lower portion engages a top of a thin-walled valve guide.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: June 12, 2001
    Assignee: Dana Corporation
    Inventors: Timothy Alan Hegemier, Mark Allen Stamback
  • Heavy-duty valve stem seal
    Patent number: 6209504
    Abstract: An integral valve stem seal retainer and spring seat for a reduced diameter valve seal subassembly is disclosed having lower and upper portions. An annular sealing member is bonded to the upper portion of the metal retainer and an annular flange extends radially outwardly of the lower portion of the retainer to engage at least one coil of a reduced diameter valve spring. The annular sealing member further includes upper and lower portions, wherein the upper portion engages an outer surface of a valve stem while the lower portion engages a top of a thin-wall valve guide.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: April 3, 2001
    Assignee: Dana Corporation
    Inventors: Timothy Alan Hegemier, Mark Allen Stamback