Method of making a piston bottom
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United States of America Patent
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-
Aug 6, 1985
Grant Date -
N/A
app pub date -
Jun 10, 1983
filing date -
Jun 16, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piston bottom for large capacity internal-combustion engines is made by forging a saucer-shaped blank from refractory-forging steel and then in a second forging step transforming the saucer-shaped blank into a cup configuration with a planar rim of the blank being transformed into a cylindrical shoulder and an annular bulge of the blank being transformed into an annular boss for connecting the piston bottom of the cylindrical body of the piston. The blank has a convexity projecting on one side of the blank opposite that formed with the bulge.
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