US PATENT SUBCLASS 123 / 248
.~.~ Abutment

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

200  DF  ROTARY {12}
247  DF  .~ Only combustion and expansion of charge in engine {2}
248.~.~ Abutment

DEFINITION

Classification: 123/248

Abutment:

(under subclass 247) Apparatus wherein the enclosed space is formed at least in part by a partition structure mounted within the cylinder structure for oscillation or reciprocation relative thereto during rotation of the piston

structure, wherein 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.