US PATENT SUBCLASS 15 / 357
.~.~.~ Suction responsive

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}
354  DF  .~.~ With work-contacting carriage or mount, and relatively adjustable nozzle {5}
357.~.~.~ Suction responsive

DEFINITION

Classification: 15/357

(under subclass 354) Apparatus in which the nozzle adjustment is determined by the air pressure differential between the ambient atmosphere and the interior of the nozzle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

319, for nozzle adjustment continuously controlled by a sensing device continuously responsive to the air pressure in the nozzle.