US PATENT SUBCLASS 251 / 187
.~ Separate actuators or actuator motion


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



251 /   HD   VALVES AND VALVE ACTUATION

157  DF  WITH MEANS TO INCREASE HEAD AND SEAT CONTACT PRESSURE {8}
187.~ Separate actuators or actuator motion {2}
188  DF  .~.~> Rotary valve
189  DF  .~.~> Piston with expansible packing


DEFINITION

Classification: 251/187

(under subclass 157) Devices comprising a different actuating means for valving and pressing motion, or different functions of the same actuator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

161, for independent actuation of both pressure increase and pressure reduction.