US PATENT SUBCLASS 123 / 237
.~.~.~ Abutment

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}
234  DF  .~.~ Compression volume means axially disposed relative to expansion volume means {4}
237.~.~.~ Abutment

DEFINITION

Classification: 123/237

Abutment:

(under subclass 234) 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.

SEE OR SEARCH CLASS

418, Rotary Expansible Chamber Devices,

243+, for abutment-type rotary chamber devices.