US PATENT SUBCLASS 137 / 308
.~.~.~.~ Waste through lower valve guide

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

272  DF  HYDRANT TYPE {15}
301  DF  .~ Protection against freezing {1}
302  DF  .~.~ Stop and waste {3}
307  DF  .~.~.~ Reciprocating relatively fixed valves {1}
308.~.~.~.~ Waste through lower valve guide

DEFINITION

Classification: 137/308

(under subclass 307) Apparatus in which the drain passage is through a guide channel for a valve extension or the valve stem or actuator projection and below the normal travel

limits of the valve.