US PATENT SUBCLASS 15 / 420
.~.~.~ With notched or grooved lips for localized intensification of air draft

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}
420.~.~.~ With notched or grooved lips for localized intensification of air draft

DEFINITION

Classification: 15/420

(under subclass 415) Nozzles in which the work-contacting lips have re-entrant portions functioning to provide a locally intensified inrush of air between the work surface and the nozzle lip.

SEE OR SEARCH THIS CLASS, SUBCLASS:

402, for nozzles having lips specially constructed or arranged to act as combs, or rakes, the construction being such that the air distribution is generally uniform throughout the nozzle with no locally intensified inrush of air.