Piston and method of making a piston
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United States of America Patent
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Sep 25, 2018
Grant Date -
Jul 24, 2014
app pub date -
Jan 21, 2014
filing date -
Jan 21, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A monobloc piston assembly for an internal combustion engine is provided. The piston assembly includes a piston body which extends along an axis and is formed of at least two pieces of material which are joined together at least one friction weld joint which extends continuously through an annular shape around the axis. One of the pieces has an upper surface with a combustion bowl having a rotationally asymmetrical shape around the axis formed therein. Another of the pieces has a dome-shaped receiving surface which is rotationally symmetrical around the axis for slidingly receiving a portion of a connecting rod.
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