Deactivation hydraulic valve lifter having a pressurized oil groove
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United States of America Patent
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Oct 12, 2004
Grant Date -
Oct 23, 2003
app pub date -
Apr 22, 2003
filing date -
Apr 22, 2002
priority date (Note) -
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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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