US PATENT SUBCLASS 123 / 59.4
.~.~.~ Disc 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  DF  .~.~ Rotary valve {3}
59.4.~.~.~ Disc valve

DEFINITION

Classification: 123/59.4

Disc valve:

(under subclass 59.1) Multiple cylinder engine wherein the rotary valve has one or more thin, circular member(s) with at least one flat surface perpendicular to the axis of rotation.