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United States of America Patent
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Sep 23, 2008
Grant Date -
Dec 2, 2004
app pub date -
May 26, 2004
filing date -
May 27, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A low friction sliding combination of a cam and a cam follower which are in slidable contact with each other in presence of a lubricating oil. The cam follower includes a cylindrical and hollow outer roller having an outer peripheral surface in slidable contact with the cam. A fixed pin is coaxially disposed inside the outer roller and rotatably movable relative to the outer roller. A diamond-like carbon material is coated on a sliding surface of at least one of the outer roller and the fixed pin. The lubricating oil contains at least one of ashless fatty acid ester friction modifier and ashless aliphatic amine friction modifier.
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