US PATENT SUBCLASS 123 / 291
.~.~.~ Multiple connecting passages

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

253  DF  PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES {22}
286  DF  .~ Having specific connecting passage means between precombustion and main combustion chambers {5}
289  DF  .~.~ Fluid flow through passage controlled by working piston {2}
291.~.~.~ Multiple connecting passages

DEFINITION

Classification: 123/291

Multiple connecting passages:

(under subclass 289) Subject matter wherein there are multiple connecting passages or divisions of a single passage between the pre and main chambers.