US 4,204,579 AGranted

Cultivator with pivotal tines

AssigneeMaschinenfabrik Rau oHG

InventorsWilly Rau, Christian Taus

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Abstract

A cultivator has a frame normally carried on the back of a tractor and pulled in a predetermined direction along the ground. A plurality of tines extend downwardly from this cultivator and penetrate the ground. Each tine is pivotal about a respective axis perpendicular to the direction of travel and parallel to the ground and is biased into a normal central position by means of a respective hydraulic actuator. The cylinders of all of the hydraulic actuators are connected together in a closed network so that if one tine is forced backwardly the other tines will be urged correspondingly forwardly and vice versa. In addition each such tine, which also may be mounted on a parallelogrammatic linkage, may carry a V-shaped backwardly extending blade increasing the mixing and aeration effect of the cultivator.

Claims28

Dependent claims

An agricultural ground-working apparatus comprising:

a frame displaceable along the ground in a predetermined normal direction of travel;
a plurality of ground-penetrating tools spaced horizontally apart on said frame;
separate mounting means between said frame and each of said tools forming for each of said tools a separate pivot on said frame for pivoting of each tool on said support forwardly and backwardly relative to said direction of travel from a respective normal central position, the separate pivot for each tool being a pivot about which only that one of said plurality of ground-penetrating tools pivots;
and
equalizing means including only a plurality of hydraulic cylinder-piston units each operatively connected to a respective one of said tools and fluid-filled conduit means interconnecting said units for pivoting one of said tools forwardly about the separate pivot thereof relative to said frame from the respective central position on displacement of another of said tools backwardly relative to said frame about the separate pivot thereof from the respective central position.

2 more elements

Dependencies are inferred from the claim text.