Timothy A Hegemier

US Patent:

6450143, Sep 17, 2002

Filed:

May 17, 2001

Appl. No.:

09/859926

Inventors:

Timothy Alan Hegemier - Avilla IN
Mark Allen Stamback - Avilla IN

Assignee:

Dana Corporation - Toledo OH

International Classification:

F02N 300

US Classification:

1231886

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.

US Patent:

6764063, Jul 20, 2004

Filed:

Feb 6, 2001

Appl. No.:

09/777535

Inventors:

Troy Daniel McArthy - Auburn IN
Timothy Alan Hegemier - Avilla IN

Assignee:

Dana Corporation - Toledo OH

International Classification:

F16K 1500

US Classification:

251330, 251337, 277313

Abstract:

A valve stem seal assembly includes an elastomeric sealing member for sealing between a reciprocally moveable valve stem and an associated valve guide in an internal combustion engine. The assembly includes a cylindrical retainer that incorporates an end wall at a first end thereof for securing the elastomeric sealing member to the retainer. The valve assembly is installed over the valve guide, and the retainer is adapted for frictional securement to the guide, whereas the retainer extends down to and engages the surface or deck of the associated engine cylinder head. The retainer includes a radially extending bottom flange at a second end opposite the end wall, wherein the flange bears directly against the cylinder head deck. The upper surface of the flange provides a bearing surface for valve return springs, while the bottom surface of the flange includes an elastomeric sealing media bonded thereto. The sealing media assures positive sealing against oil leakage between the valve guide and the cylinder head deck.

US Patent:

6764079, Jul 20, 2004

Filed:

Apr 19, 2002

Appl. No.:

10/126565

Inventors:

Timothy A. Hegemier - Avilla IN
Alexander S. Williamson - Fort Wayne IN

Assignee:

Dana Corporation - Toledo OH

International Classification:

F02F 1100

US Classification:

277502, 1231886, 277437

Abstract:

A radially compliant valve stem seal assembly is adapted for installation over a valve guide of an internal combustion engine. The assembly includes a metallic cylindrical straight-walled retainer with an elastomeric sealing element chemically bonded to the interior surface of the retainer. The sealing element includes upper and lower portions; the upper portion includes a pair of sealing lips comprising an oil sealing lip and a gas sealing lip. The lips are adapted to meter oil through an interface between the seal assembly and the associated valve stem for assuring proper lubrication at the interface. The lower portion of the elastomeric sealing element provides one or more annular radially inwardly oriented gripping ribs adapted to engage the guide via an interference fit. The gripping ribs are adapted to balance forces of installation against those of securement of the valve stem seal assembly over a wide valve guide diameter tolerance range.

US Patent:

6848671, Feb 1, 2005

Filed:

Nov 29, 2001

Appl. No.:

09/997861

Inventors:

Timothy A. Hegemier - Avilla IN, US
Steven M. Fisher - Ft. Wayne IN, US

Assignee:

Dana Corporation - Toledo OH

International Classification:

F16K 4100

US Classification:

251214, 251337, 1231886

Abstract:

A valve stem seal assembly includes several protrusions or bumps on the bottom of a spring seat flange or on a spring wear washer surrounding the seal. The protrusions can be either cast formed or machined in place. In described embodiments, the protrusions are adapted to engage corresponding depressions, holes, or receptors in a cylinder head deck surface against which the flange or wear washer abuts. A positive mechanical anchor is thereby created for resisting any torque applied to the flange or washer through mechanical vibration induced rotation of the valve spring. Sliding contact is thereby avoided at the interface between the flange or washer and the cylinder head, and wear is prevented. Use of one disclosed embodiment will require that the cylinder head manufacturer provides a cylinder head that includes several small depressions or apertures in the valve spring seat area that correspond with the disclosed protrusions or bumps.

US Patent:

6938877, Sep 6, 2005

Filed:

Jul 2, 2003

Appl. No.:

10/612454

Inventors:

Troy D. Mc Arthy - Auburn IN, US
Timothy A. Hegemier - Avilla IN, US

Assignee:

Dana Corporation - Toledo OH

International Classification:

F01L003/08

US Classification:

251214, 1231886, 1231889

Abstract:

A valve stem seal assembly includes a retainer and a sealing element disposed within the retainer. The retainer includes a step and one or more installation pads. The sealing element includes a first sealing lip for sealing a valve stem, and a second sealing lip for sealing a chamfer of a valve guide. The step of the retainer exerts a compression force, F, against the second sealing lip to seal the second sealing lip against the chamber of the valve guide. The one or more installation pads exerts a frictional force against the valve guide to prevent movement of said valve stem seal assembly. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1. 72(b).

US Patent:

7013692, Mar 21, 2006

Filed:

Aug 20, 2003

Appl. No.:

10/644439

Inventors:

Timothy A. Hegemier - Avilla IN, US

Assignee:

Dana Corporation - Toledo OH

International Classification:

B21D 3/02

US Classification:

72118, 72121, 470185

Abstract:

A tool for grooving an outer surface of a valve guide comprising a tool body, a tightening nut disposed about a portion of the tool body, one or more rollers rotatably mounted within a bushing, and a handle for rotating the one or more rollers of the tool about the outer surface of the valve guide, wherein the tool is capable of grooving the outer surface of the valve guide while the cylinder head is mounted to an engine. The grooves on the outer surface of the valve guide allow the valve stem seal to grip the valve guide more effectively, thereby improving the retention force on the valve guide. As a result, the movement of the valve stem seal is minimized. A method of using the tool is also described.

US Patent:

7299779, Nov 27, 2007

Filed:

Sep 28, 2005

Appl. No.:

11/237097

Inventors:

Timothy A. Hegemier - Avilla IN, US
Cathy Stamback, legal representative - Avilla IN, US

Assignee:

Dana Corporation - Toledo OH

International Classification:

F02N 3/00

US Classification:

1231886, 1231907

Abstract:

A valve stem seal of an internal combustion engine is described wherein the valve stem seal includes an outer peripheral surface and an inner sealing surface. The inner sealing surface minimizes ingress of a liquid upwardly from an intake port area into an overhead engine area by having at least one sealing lip disposed on an upper portion of the inner sealing surface and extending away from the inner sealing surface. The sealing lip includes a generally square lower corner.

US Patent:

20030146580, Aug 7, 2003

Filed:

Feb 1, 2002

Appl. No.:

10/061132

Inventors:

Timothy Hegemier - Avilla IN, US

International Classification:

F02F011/00

US Classification:

277/502000

Abstract:

A radially compliant valve stem seal assembly for an internal combustion engine includes a metallic retainer having a plurality of circumferentially spaced, axially depending legs. Each of the legs includes at least one radially inwardly depending protuberance adapted to engage a valve guide surface. The legs are arranged and disposed on the retainer to be radially flexible, yet axially stiff, to balance forces of installation against those of securement of valve stem seal assembly over a wide valve guide diameter tolerance range. In one disclosed embodiment, the retainer has three separate circumferentially spaced legs, each including a single dimple in its structure. The dimples are adapted to provide the only direct contact of the legs with the valve guide circumference. The retainer legs are adapted to flex radially outwardly, and produce a spring tension between the dimples and the guide for maintaining the dimples in engagement with the valve guide.