US PATENT SUBCLASS 137 / 505.17
.~.~.~.~ Weight

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}
505.14  DF  .~.~.~ Bias variable during operation {3}
505.17.~.~.~.~ Weight

DEFINITION

Classification: 137/505.17

(under subclass 505.14) Devices in which the means comprises a weight varied in accordance with the pressure of the line fluid.