US PATENT SUBCLASS 251 / 161
.~.~.~ Independent actuation

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  DF  .~.~ Rotary valve {3}
161.~.~.~ Independent actuation

DEFINITION

Classification: 251/161

(under subclass 160) Subject matter wherein the means to increase the seating pressure is operated by means independent of the means actuating the valve.

SEE OR SEARCH CLASS

137, Fluid Handling,

637+, for a plurality of valves in a distribution system provided with individual actuator mechanisms.