US PATENT SUBCLASS 261 / 121.4
.~.~.~.~ Air inlet valve

Current as of: June, 1999
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261 /   HD   GAS AND LIQUID CONTACT APPARATUS

75  DF  CONTACT DEVICES {11}
119.1  DF  .~ Liquid tank {5}
121.1  DF  .~.~ Submerged blast {5}
121.3  DF  .~.~.~ Carburetor vented nozzle {1}
121.4.~.~.~.~ Air inlet valve

DEFINITION

Classification: 261/121.4

Air inlet valve:

(under subclass 121.3) Apparatus including valve means controlling flow of the mixing air.