US PATENT SUBCLASS 15 / 413
.~.~.~ Air cooling by other than main air stream

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}
412  DF  .~.~ Motor features, e.g., housing or casing assemblies {1}
413.~.~.~ Air cooling by other than main air stream

DEFINITION

Classification: 15/413

(under subclass 412) Apparatus including provisions for causing a draft of air other than the entire main cleaning air stream to contact the motor for cooling or ventilating.

(1) Note. Patents in which the motor merely is located in the main air stream are excluded from this subclass. Such arrangements generally are found in "tank type" cleaners, see subclass 327 for example.