US PATENT SUBCLASS 15 / 417
.~.~.~.~ Top and bottom reversible type

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}
416  DF  .~.~.~ With plural mouths selectively usable, e.g., "duplex" nozzles {1}
417.~.~.~.~ Top and bottom reversible type

DEFINITION

Classification: 15/417

(under subclass 416) Nozzles having oppositely facing or diverging nozzle mouths and in which the nozzle unit is arranged so that one of the mouths can be brought selectively into a working position wherein the air-draft flows therethrough, the other mouths being isolated or cut off from the air flow.