US PATENT SUBCLASS 251 / 148
.~ Pipe coupling or union

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

142  DF  WITH CORRELATED FLOW PATH {9}
148.~ Pipe coupling or union {3}
150  DF  .~.~> Flexible or expansible
151  DF  .~.~> Non-rotatable conduit coupling
152  DF  .~.~> Valve seat and coupling element removable as a unit

DEFINITION

Classification: 251/148

(under subclass 142) Subject matter wherein the flow path includes a pipe coupling or union.

SEE OR SEARCH THIS CLASS, SUBCLASS:

149+, for a valved pipe joint wherein the valve is operated by the coupling act.

149.9, for a valve pipe joint wherein the valve, or its actuator, is interlocked with the coupling means.

155+, for valves combined with nozzles and spouts, and see the search notes thereto.

SEE OR SEARCH CLASS

137, Fluid Handling, 231, for couplings in inflatable article filling chucks and

stems, subclasses 479+ for suction operated valves in governor attachments for carburetors, subclasses 515+ for direct response check and safety valves mounted in pipe couplings, especially drill pipe check valves, subclasses 614+ for separable, valved, flow path sections, and subclass 637.05 for separable, valved, flow path sections wherein the valves have separate correlated actuators.

141, Fluent Material Handling, With Receiver or Receiver Coacting Means,

335, 336, 348+, and 351+ for a valved joint between a portable supply and a receiver, the valve being operated by the act of connecting or disconnecting them.