US PATENT SUBCLASS 172 / 445.1
.~ Including blade, scraper, or smoother


Current as of: June, 1999
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172 /   HD   EARTH WORKING

439  DF  MAST TYPE HITCH (E.G., THREE POINT HITCH, ETC.) {10}
445.1.~ Including blade, scraper, or smoother {1}
445.2  DF  .~.~> Angularly adjustable about vertical axis


DEFINITION

Classification: 172/445.1

Including blade, scraper, or smoother:

(under subclass 439) Apparatus in which at least one earth working element is supported by a mast structure, wherein the element has either (a) a substantially vertical working surface adapted to strike off or level the earth, or (b) a substantial area adapted to contact the earth in a horizontal direction to compact or smooth the earth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4.5, for a scraper which is automatically power-controlled for leveling.

26.5+, for a dragline scraper.

72, for a driven tool followed by a leveling drag or furrow shaper.

189, and 612, for flexible implements including flexible matlike drags.

197, and 199+, for diverse tools, one of which comprises a drag or smoother that may be mounted on a vehicle by a three-point hitch. 777+, for a scraper supporting a narrow depending tool.

779, for a scraper whose position is controlled by a linkage for leveling.

780, and 781+, for a scraper between front and rear vehicle supports.

799.5, for a towed scraper on a wheel-supported frame.

810+, for a scraper ahead of a motor vehicle.