US PATENT SUBCLASS 123 / 257
.~ Two-cycle

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

253  DF  PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES {22}
257.~ Two-cycle

DEFINITION

Classification: 123/257

Two-cycle:

(under subclass 253) Subject matter in which the engine operates on the two-stroke cycle principle.

(1) Note. An engine operating in the two-stroke cycle principle completes its operating cycle in one crankshaft revolution.