US PATENT SUBCLASS 137 / 475
.~.~ Adjustable choke

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

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
469  DF  .~ Pop valves {5}
475.~.~ Adjustable choke {1}
476  DF  .~.~.~> Annular lip or baffle {2}

DEFINITION

Classification: 137/475

(under subclass 469) Valves in which the flow path giving access to the auxiliary reactor is controlled by an adjustable choke.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

118+, for flow restrictors or chokes in combination with valves of general application, especially subclass 121 for the adjustable type; and see the search notes to subclass 119.