ENGINE PISTON AND METHOD FOR MANUFACTURING THE SAME
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United States of America Patent
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Issued Date -
Nov 12, 2020
app pub date -
Apr 27, 2020
filing date -
May 10, 2019
priority date (Note) -
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Abstract
There is provided an engine piston including a piston main body and a piston pin. The piston main body includes a piston head that has a crown surface forming a part of a wall of a combustion chamber and a pair of pin bosses that are connected to a side of the piston head opposite to the crown surface, arranged with a distance between the pin bosses in a first direction included in a radial direction of the piston head, and respectively have pin holes for the piston pin, the pin holes penetrating in the first direction. The piston head includes a pair of hollow parts extending in a second direction orthogonal to both the axial direction and the first direction at a position between the crown surface and each of the pin holes in the axial direction and a particulate filler filled in the pair of hollow parts.
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