US PATENT SUBCLASS 123 / 223
.~.~ Reciprocating or oscillating compression volume means

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

200  DF  ROTARY {12}
221  DF  .~ With transfer means intermediate single compression volume means and single expansion volume means {5}
223.~.~ Reciprocating or oscillating compression volume means {1}
224  DF  .~.~.~> Radially spaced from expansion volume means {2}

DEFINITION

Classification: 123/223

Reciprocating or oscillating compression volume means:

(under subclass 221) Apparatus wherein the means to pressurize the combustible material has a member capable of moving alternately backward and forward thereby pressurizing the combustible material.