US PATENT SUBCLASS 137 / 284
.~.~ With extension to facilitate removal

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

272  DF  HYDRANT TYPE {15}
283  DF  .~ Removable valve and valve seat {1}
284.~.~ With extension to facilitate removal

DEFINITION

Classification: 137/284

(under subclass 283) Apparatus in which the valve seat is provided with an extension independent of the riser, to facilitate its removal.