MULTILAYER GASKET WITH EXTENDED RIM LABYRINTH FEATURE
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United States of America Patent
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Issued Date -
Sep 13, 2012
app pub date -
Mar 8, 2012
filing date -
Feb 19, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A multilayer metal gasket having first and second functional layers. Each layer includes an opening for sealing a fluid passage or combustion chamber. Each layer includes a folded lip or rim bent in opposite directions and overlapping one another in a nested configuration to form a labyrinth which serves also as the compression stopper feature for the gasket assembly. Sealing beads are formed in each layer and, preferably, are arranged to contact each other in crest-to-crest orientation to perfect a seal. In one embodiment, the first rim is extended in length, and extends into and partially fills a crevice volume defined in the space between a piston and the side wall of a combustion chamber above the top piston ring.
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