Piston for internal combustion engine
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United States of America Patent
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-
Feb 5, 2008
Grant Date -
Sep 21, 2006
app pub date -
Feb 27, 2006
filing date -
Mar 18, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A piston includes: in a cross-section that is perpendicular to a piston pin and that includes a center axis of the piston, a great thickness-reduction portion provided to attain a thin thickness as stress applied to the piston on a side without a cavity is small, and a small thickness-reduction portion provided to attain a thick thickness as stress applied to the piston on a side with the cavity is great; and in a cross-section that is perpendicular to the piston pin and that does not include a center axis of the piston, a great thickness-reduction portion provided on a side without the cavity to attain a thin thickness to achieve balance of the piston, and a small thickness-reduction portion provided on a side with the cavity.
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