US PATENT SUBCLASS 123 / 190.7
.~.~.~.~ Tapered

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

188.1  DF  VALVE {10}
190.1  DF  .~ Rotary {7}
190.4  DF  .~.~ Double function type {4}
190.6  DF  .~.~.~ Elongated rotary double-function valve {1}
190.7.~.~.~.~ Tapered

DEFINITION

Classification: 123/190.7

Tapered:

(under subclass 190.6) Apparatus wherein the cross section of the rotary valve becomes gradually narrower along the rotational axis.