Two-piece piston and method of manufacturing the same
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United States of America Patent
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Nov 19, 1991
Grant Date -
N/A
app pub date -
Oct 19, 1989
filing date -
Oct 26, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for the manufacture of a two-piece piston wherein the top portion and the pin boss portion, which define the piston head, are fabricated separately by cold or hot forming, casting or sintering, and joined together by welding such as, for instance, friction welding. The top portion and the pin boss portion may be of the same material or different materials, and obtained by the same method or by different methods.
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