US PATENT SUBCLASS 37 / 275
.~.~.~.~ Top flap

Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
266  DF  .~ Scraper blade {5}
272  DF  .~.~ V-shaped {5}
274  DF  .~.~.~ And auxiliary wing or extension {1}
275.~.~.~.~ Top flap

DEFINITION

Classification: 37/275

Top flap:

(under subclass 274) Apparatus wherein the auxiliary wing or extension is a moldboard like element adapted to be attached adjacent and parallel to the top edge of its primary moldboard.

(1) Note. A common function of a top flap is to prevent snow or ice from blowing over the plow.