US PATENT SUBCLASS 251 / 160
.~.~ Rotary valve

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

157  DF  WITH MEANS TO INCREASE HEAD AND SEAT CONTACT PRESSURE {8}
158  DF  .~ With positive reduction {3}
160.~.~ Rotary valve {3}
161  DF  .~.~.~> Independent actuation
162  DF  .~.~.~> Cam or wedge {1}
164  DF  .~.~.~> Screw {1}

DEFINITION

Classification: 251/160

(under subclass 158) Subject matter wherein the valve member is of the rotary type, e.g., plug or disk.