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US 3,954,143 AGranted
Rotary ploughs
OwnerCornelis van der Lelyinventor
Life of this patent
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OwnerCornelis van der Lelyinventor
Estimating the term…
A rotary plough has a rotor that rotates about a horizontal axis defined by a central support. The rotor comprises three spaced apart groups of soil working tines and each group includes a row of tines mounted on arms that extend radially with respect to the support. Each row of tines is independently connected via a chain transmission to a toothed pinion on the central support so that as the entire rotor turns about the support, each row of tines is also revolved about a horizontal axis. The central support is rotated by a further sprocket and chain transmission connected to a gear box with a P.T.O connection. The central support is surrounded by a second rotatable support on which radial scrapers are mounted. The gear box is connected to rotate the entire rotor as a whole and the three groups of tines in the same direction so that the tines are moved through the soil rearwardly with respect to the normal direction of travel. The scrapers are turned in an opposite direction to intersect the paths of travel of the tines and to scrape some of the earth. The scrapers and tine rows are geared to revolve twice for each full turn of the rotor. The tines are bolted to their holding supports and curved to dig out and lift up slices of soil which are then inverted and deposited on the ground. The digging or angled positions of the tines can be adjusted by a fixing arrangement at one end of the central support.
A rotary plough comprising a frame and a rotor mounted on horizontal support means on said frame, said rotor having a substantially horizontal axis of rotation, means rotatably mounting soil working means on said rotor so as to be turnable relative to the remainder of said rotor, and movable in a rotary path through the ground to penetrate, loosen and lift successive slices of soil upwardly out of the ground, means rotatably connecting at least one scraping member on said support means within said path and said scraping member being positioned to describe a path that intersects said rotary path of said soil working means during operation and remove soil from said soil working means, driving means on said plow in driving engagement with said rotor, said scraping member and said soil working means.
A rotary plough comprising a frame and a rotor mounted with horizontal support means on said frame, said rotor being rotable about said support means and having means rotatably mounting groups of soil working members on said rotor and said groups being rotatable about corresponding horizontal axes that are held by arm means that extend radially from said support means, means rotatably attaching a scraping member on said support means and driving means connected to said rotor, each of said groups of coil working members and said scraping member, said driving means including an imput gear that engages a drive shaft and a driving shaft, said drive shaft being connected to rotate said rotor and said groups of soil working members in one direction, said driving shaft being connected to rotate said scraping member in a second and opposite direction, said scraping member including at least one scraper that extends radially from said support means and said scraper being movable through an intersecting path with respect to said soil working members.
Dependencies are inferred from the claim text.