US PATENT SUBCLASS 15 / 419
.~.~.~ With air flow control means, e.g., work-operated valve

Current as of: June, 1999
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15 /   HD   BRUSHING, SCRUBBING, AND GENERAL CLEANING

3  DF  MACHINES {11}
300.1  DF  .~ With air blast or suction {26}
415.1  DF  .~.~ Nozzle {7}
419.~.~.~ With air flow control means, e.g., work-operated valve

DEFINITION

Classification: 15/419

(under subclass 415) Nozzles having means to regulate the quantity or to cut off the flow of air therethrough.

SEE OR SEARCH THIS CLASS, SUBCLASS:

328, for nozzles having agitators or the like wherein the air flow may be cut off to convert the nozzle into a nonair-draft device.

417, for air blast cleaning devices having a work-operated valve.