Apparatus and method for maintaining controlled orientation of a roller lifter follower used in conjunction with a variable phased lifter
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United States of America Patent
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Aug 12, 2008
Grant Date -
May 31, 2007
app pub date -
Nov 30, 2005
filing date -
Nov 30, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a variable phased valve lifter of an internal combustion engine, two or more roller lifter are allowed to move along constraining faces of a constraining mechanism in a first direction, and the constraining mechanism is allowed to move freely in a second direction. As the roller lifters move through their parallel arcuate paths, the engaging surface(s) of the roller lifters will engage with the constraining face(s) of the constraining mechanism, and each roller lifter will prevent the other from rotating about its longitudinal axis. The roller lifter is thus prevented from rotating about its longitudinal axis as it moves in arcuate fashion in cooperation with the constraining mechanism.
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