Camshaft and camshaft manufacturing method
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United States of America Patent
Stats
-
May 10, 2011
Grant Date -
Jul 16, 2009
app pub date -
Nov 11, 2008
filing date -
Jan 10, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A cam lobe of a camshaft has a base circle portion and a lifting lobe portion. A camshaft journal of the camshaft has first and second bearing portions that bear reaction forces from the base circle portion and the lifting lobe portion, respectively. The first bearing portion has an axial width smaller than that of the second bearing portion with at least a portion of an axial end surface of the first bearing portion facing the cam lobe being disposed away from the cam lobe relative to an axial end surface of the second bearing portion. The base circle portion has an axial width smaller than that of the lifting lobe portion with at least a portion of an axial end surface of the base circle portion facing the camshaft journal being disposed away from the camshaft journal relative to an axial end surface of the lifting lobe portion.
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