US PATENT SUBCLASS 123 / 190.1
.~ Rotary

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

188.1  DF  VALVE {10}
190.1.~ Rotary {7}
190.12  DF  .~.~> Sleeve {1}
190.3  DF  .~.~> For crankcase
190.4  DF  .~.~> Double function type {4}
190.14  DF  .~.~> Disc, cone, or sphere shaped {1}
190.2  DF  .~.~> Single function, (i.e., exhaust and intake by separate tube)
190.16  DF  .~.~> Lubricant
190.17  DF  .~.~> Seal

DEFINITION

Classification: 123/190.1

Rotary:

(under subclass 188.1) Apparatus having a valve that rotates, or revolves during opening and closing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

80, for rotating valve, specific to a 4 cycle engine.