US PATENT SUBCLASS 251 / 188
.~.~ 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}
187  DF  .~ Separate actuators or actuator motion {2}
188.~.~ Rotary valve

DEFINITION

Classification: 251/188

(under subclass 187) Subject matter wherein the valve is of the rotary type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

161, for similar independent actuators in rotary valves but which also provided for positive reduction of the seating pressure, and see the search notes to subclass 161.