US PATENT SUBCLASS 416 / 169 A
.~ Engine cooling fans

Current as of: June, 1999
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416 /   HD   FLUID REACTION SURFACES (I.E., IMPELLERS)

169 R  DF  HAVING CLUTCH OR BRAKE MEANS {1}
169 A.~ Engine cooling fans

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 416/169

(under the class definition) Apparatus comprising means which selectively (1) engages the impeller* with a driving or driven mechanism or (2) retards or stops rotary motion of the impeller*.