Piston, especially cooling channel piston, comprising three friction-welded zones
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United States of America Patent
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Sep 6, 2011
Grant Date -
Sep 25, 2008
app pub date -
Sep 17, 2005
filing date -
Sep 17, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A piston, especially a cooling channel piston of an internal combustion engine, has an upper part and a lower part which can be produced separately from each other and subsequently be assembled. The upper part has at least three radially peripheral joining webs and the lower part likewise at least three radially peripheral joining webs. During assembly, the webs are put together and connect the upper part firmly to the lower part.
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