US PATENT SUBCLASS 137 / 505.28
.~.~.~.~.~ Also through reactor surface

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
494  DF  .~ With separate connected fluid reactor surface {8}
505  DF  .~.~ With opening bias (e.g., pressure regulator) {13}
505.26  DF  .~.~.~ Reactor surface separated by apertured partition {3}
505.27  DF  .~.~.~.~ In valve stem {1}
505.28.~.~.~.~.~ Also through reactor surface

DEFINITION

Classification: 137/505.28

(under subclass 505.27) Devices in which said passage further extends through the reactor surface so as to apply pressure to the rear of the reactor surface.