US PATENT SUBCLASS 123 / 59.1
.~.~ Rotary valve

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

52.1  DF  MULTIPLE CYLINDER {7}
58.1  DF  .~ Cylinders in-line {10}
59.1.~.~ Rotary valve {3}
59.2  DF  .~.~.~> Tapered
59.3  DF  .~.~.~> Sleeve valve
59.4  DF  .~.~.~> Disc valve

DEFINITION

Classification: 123/59.1

Rotary valve:

(under subclass 58.1) Multiple cylinder engine including a rotating valve mechanism.