US PATENT SUBCLASS 251 / 152
.~.~ Valve seat and coupling element removable as a unit

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

142  DF  WITH CORRELATED FLOW PATH {9}
148  DF  .~ Pipe coupling or union {3}
152.~.~ Valve seat and coupling element removable as a unit

DEFINITION

Classification: 251/152

(under subclass 148) Devices in which the valve seat and a pipe coupling element are a unitary subassembly.