Depth control for ground working agricultural implements

Earth working – Automatic power control – Land leveller type

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172572, A01B 63114

Patent

active

041767217

ABSTRACT:
A depth control device is attached to agricultural implements such as cultivators, seed drills, discers and the like, in order to control, within pre-determined limits, the depth of penetration of the earth working components. It comprises firstly a ground or surface engaging sensing member extending forwardly of the framework and secondly, a sensor that is connected to the earth working components. Both of these sensors are connected to mechanism to raise and lower the earth working components which controls the depth of penetration thereof so that, for example, if uneven ground is encountered, the depth penetration is corrected and if the density changes of the ground being worked, thus affecting the suction, then once again depth penetration is corrected. Structure is provided to average out the effect of conditions changing the depth of penetration so that the desired average depth of penetration is maintained particularly in relatively wide machines. Switches are actuated by the sensors and these switches are connected to solenoids or solenoid valves which in turn operate the raising and lowering mechanism for the earth working components, the mechanism being operated either by hydraulic rams or reversible electric or hydrostatic motors.

REFERENCES:
patent: 1047644 (1912-12-01), James
patent: 1526639 (1925-02-01), Leebold
patent: 1653760 (1927-12-01), Carey
patent: 2486442 (1949-11-01), Silver
patent: 3627053 (1971-12-01), Hook et al.
patent: 3658133 (1972-04-01), Sweet et al.

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