US PATENT SUBCLASS 123 / 249
.~.~ Interengaging rotors

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}
249.~.~ Interengaging rotors

DEFINITION

Classification: 123/249

Interengaging rotors:

(under subclass 247) Apparatus wherein the enclosed space is formed at least in part by a seal produced by the engagement of a rotatable element structure with the periphery of the piston structure.

SEE OR SEARCH CLASS

418, Rotary Expansible Chamber Devices,

191+, for gear-type rotary chamber devices.