US PATENT SUBCLASS 220 / 203.22
.~.~.~.~ Locking feature

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
202  DF  .~ With condition responsive vent or valve {1}
203.01  DF  .~.~ Responsive to pressure {10}
203.19  DF  .~.~.~ Specified valve structure provides a diverse function (e.g., leakage preventing, lock releasing) {3}
203.22.~.~.~.~ Locking feature

DEFINITION

Classification: 220/203.22

Locking feature:

(under subclass 203.19) Device wherein said secondary function comprises a feature which maintains the closure in a locked condition so as to eliminate the risk of unintentional removal.