INTERNAL COMBUSTION ENGINE PISTON
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United States of America
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Issued Date -
Jan 23, 2020
app pub date -
Mar 6, 2017
filing date -
Mar 6, 2017
priority date (Note) -
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Abstract
A piston for an internal combustion engine includes: a pair of groove portions which are positioned on the back surface side of the crown portion, and which extend along outer wall surfaces of the apron portions, each of the skirt portions having a width in the circumferential direction of the piston, the width being gradually decreased toward a piston axially lower side which is an axial direction of the piston from the piston crown surface toward the back surface of the crown portion, and each of the groove portions being positioned on an outer side in a radial direction of the piston as the each of the groove portions is positioned on the piston axially lower side, an entire of the each of the groove portions being inclined with respect to a center axis of the piston.
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