US PATENT SUBCLASS 37 / 233
.~.~ Resilient impeller or blade

Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
232  DF  .~ Vehicle mount with obstacle responsive trip, or yieldable tool (e.g., brush) {1}
233.~.~ Resilient impeller or blade

DEFINITION

Classification: 37/233

Resilient impeller or blade:

(under subclass 232) Apparatus including either a van means carried by a shaft, or a moldboard, which contains either an elastically deformable portion or a plurality of segments mounted elastically relative to one another.