US PATENT SUBCLASS 220 / 203.04
.~.~.~ Manually adjustable

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}
203.04.~.~.~ Manually adjustable {2}
203.05  DF  .~.~.~.~> Having rotatably adjustable closure which places vent or valve in operative position {1}
203.07  DF  .~.~.~.~> Valve operated by distinct actuator or closure

DEFINITION

Classification: 220/203.04

Manually adjustable:

(under subclass 203.01) Device wherein the vent or valve is provided with manually operable means to (a) adjust the position of the vent or valve to a venting or nonventing position or (b) adjust the vent or valve to respond to varied pressures.