US PATENT SUBCLASS 123 / 190.4
.~.~ Double function type

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.~.~ Double function type {4}
190.5  DF  .~.~.~> For two or more cylinders
190.6  DF  .~.~.~> Elongated rotary double-function valve {1}
190.8  DF  .~.~.~> In horizontal plane above cylinder {1}
190.11  DF  .~.~.~> In horizontal plane on the side of the cylinder

DEFINITION

Classification: 123/190.4

Double function type:

(under subclass 190.1) Apparatus wherein a single rotary valve handles both intake and exhaust gases for cylinder.