US PATENT SUBCLASS 137 / 505.22
.~.~.~ Through external pipe

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}
505.22.~.~.~ Through external pipe {2}
505.23  DF  .~.~.~.~> Modified valve casing
505.24  DF  .~.~.~.~> Adjustable external lever

DEFINITION

Classification: 137/505.22

(under subclass 505) Devices in which the pressure fluid is communicated to a chamber enclosing the reactor surface through a pipe external of the chamber.