Fixed shaft moisture intrusion shield for a valve pintle

Details Fixed shaft moisture intrusion shield for a valve pintle Fixed shaft moisture intrusion shield for a valve pintle

2005-04-05

2005-04-05

Nguyen, Tuan (Department: 3751)

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

C251S129150, C251S129170

Reexamination Certificate

active

06874755

ABSTRACT:
A solenoid-actuated pintle valve assembly having a pintle shaft extending from a metering base sub-assembly into a solenoid actuator sub-assembly, the pintle shaft being equipped with a radially-extending fixed shield outside the metering base sub-assembly. The shield moves axially with the pintle during valve actuation and is located on the shaft so that when the pintle is in the valve-closed position, the shield cooperates with the pintle bushing to form an effective impedance to gas leakage from the metering base sub-assembly along the pintle shaft. When the valve is in the fully open position at the opposite extreme of pintle travel, the shield cooperates with an armature shield in the actuator to prevent entrance of gases into the solenoid. The invention is especially useful for exhaust gas recirculation valves on internal combustion engines.

REFERENCES:
patent: 5911401 (1999-06-01), Hrytzak et al.
patent: 6439213 (2002-08-01), Bircann et al.
patent: 6453934 (2002-09-01), Bircann et al.
patent: 6467754 (2002-10-01), Bircann et al.
patent: 6484705 (2002-11-01), Bircann et al.
patent: 6497226 (2002-12-01), Bircann et al.
patent: 6543746 (2003-04-01), Bircann et al.
patent: 6634346 (2003-10-01), Bircann et al.

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