Engine piston with rolling element skirt
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United States of America Patent
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May 10, 2011
Grant Date -
Oct 22, 2009
app pub date -
Apr 16, 2008
filing date -
Apr 16, 2008
priority date (Note) -
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Abstract
The present invention utilizes rolling elements, such as balls or rollers acting as bearings carried in openings in the skirt or equivalent portion of a piston, to engage the cylinder walls and replace the sliding bearings of the skirt with the roller elements in the skirt. The rolling elements then absorb all or some of the thrust loads conventionally absorbed by the skirt walls sliding along surfaces of an associated cylinder and thereby reduce the friction forces developed by the reciprocating action of the piston skirt.
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