US PATENT SUBCLASS 15 / 331
.~.~.~ Plural selective air draft means, e.g., on-floor to off-floor

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}
328  DF  .~.~ Convertible {4}
331.~.~.~ Plural selective air draft means, e.g., on-floor to off-floor {2}
332  DF  .~.~.~.~> With agitator and/or fan interlock, e.g., floor or rug safety feature {1}
334  DF  .~.~.~.~> Floor nozzle air flow diverted to off-floor cleaning means {2}

DEFINITION

Classification: 15/331

(under subclass 328) Cleaning apparatus having a plurality of alternatively usable provisions for applying an air draft and including means to select one or more of such means.

(1) Note. For the purpose of this and the indented subclasses, the provisions for applying may be a mere port or orifice or may include a flexible conduit with or without a cleaning tool on the working end; the selecting means may be a movable closure for a port.