Apparatus for preventing valve stem coking
An exhaust gas recirculation valve having a reciprocating pintle shaft supported by a sleeve bushing and having a labyrinthine pathway between a valve operating chamber and a shaft/bushing interface to minimize intrusion of exhaust gases into the interface. The labyrinthine pathway is formed between fixed annular elements of the valve body and shaft bushing and a movable annular element of the valve head telescopically disposed between the fixed elements.
Delphi Technologies, Inc.
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F16K F02M F02M F02M
inventional additional inventional inventional
Christopher D. Craig D. Mark A. Mahoro M. Paul L. Mark S. Todd P. Jerry L.
Marlowe Smith Reeves Fujita Gluchowski Lockwood Geib Kelly