US PATENT SUBCLASS 123 / 289
.~.~ Fluid flow through passage controlled by working piston

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.~.~ Fluid flow through passage controlled by working piston {2}
290  DF  .~.~.~> With whirling
291  DF  .~.~.~> Multiple connecting passages

DEFINITION

Classification: 123/289

Fluid flow through passage controlled by working piston:

(under subclass 286) Subject matter wherein the flow or fluid in the connecting passage between the main and pre chamber is valved or otherwise controlled by some portion of or attachment to the engine working piston.