US PATENT SUBCLASS 123 / 286
.~ Having specific connecting passage means between precombustion and main combustion chambers

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.~ Having specific connecting passage means between precombustion and main combustion chambers {5}
287  DF  .~.~> With ignition means in connecting passage
288  DF  .~.~> Having fuel, a combustible mixture, or air added in the connecting passage
289  DF  .~.~> Fluid flow through passage controlled by working piston {2}
292  DF  .~.~> With valve means or variable orifice means in the passage
293  DF  .~.~> Having multiple passages

DEFINITION

Classification: 123/286

Having specific connecting passage means between precombustion and main combustion chambers:

(under subclass 253) Subject matter wherein significance is attributed to the design of the passage between the pre and main combustion chambers.

(1) Note. The design is usually disclosed as being critical to the combustion process.