Deactivation hydraulic valve lifter having a pressurized oil...

Details Deactivation hydraulic valve lifter having a pressurized oil... Deactivation hydraulic valve lifter having a pressurized oil...

2005-07-26

2005-07-26

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090160, C123S090550, C123S090350, C123S19800E, C123S090120, C123S090570

Reexamination Certificate

active

06920857

ABSTRACT:
A deactivation hydraulic valve lifter which includes an elongate lifter body having a substantially cylindrical outer surface and an inner wall, the inner wall defining at least one annular pin chamber therein. The outer surface defining at least one annular groove in fluid communication with a high-pressure oil gallery of an engine, the lifter body having a lower end configured for engaging cam of the engine.

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patent: 5245958 (1993-09-01), Krieg et al.
patent: 6460499 (2002-10-01), Mason et al.
patent: 6497207 (2002-12-01), Spath et al.
patent: 6513470 (2003-02-01), Hendriksma et al.

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