US PATENT SUBCLASS 123 / 225
.~.~.~.~ Abutment acts as compression 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  DF  .~.~ Reciprocating or oscillating compression volume means {1}
224  DF  .~.~.~ Radially spaced from expansion volume means {2}
225.~.~.~.~ Abutment acts as compression means

DEFINITION

Classification: 123/225

Abutment acts as compression means:

(under subclass 224) Apparatus wherein the means to receive the combusted material is formed in part by a first portion of a partition structure mounted within the cylinder structure for oscillation or reciprocation relative thereto during rotation of the piston structure, wherein the first portion of the partition structure engages the periphery of the piston structure to form a seal therebetween, and further wherein a second portion of the partition structure acts as a means to compress the air or combustible material.