(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.
