Piston formed by powder metallurgical methods
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United States of America Patent
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Dec 13, 2005
Grant Date -
Jul 8, 2004
app pub date -
Jan 8, 2003
filing date -
Jan 8, 2003
priority date (Note) -
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Abstract
A piston includes a piston structure being unitarily formed in a powder metallurgy process, the piston structure having a crown assembly and a skirt assembly, at least a partial combustion chamber being formed intersecting a piston crown surface during the powder metallurgy process, the skirt assembly depending from the crown assembly and having two spaced apart pin bosses, each pin boss having a pin bore defined therein, a pair of opposed semi-circular skirt members, each skirt member extending outwardly from and being integrally joined to both of the pin bosses. The piston may be formed by executing a powder metallurgy process on at least two different metallic constituents to define a non-homogenous piston structure. A method of forming a piston is further included.
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