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Agricultural implement and method of controlling an agricultural implement

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TLDR
In this article, an agricultural implement, for working soil across which the agricultural implement travels or is towed, comprises a frame (10), a first depth maintaining unit (12a, 12b), comprising a first hydraulic actuator (13a) for adjusting the height of the first depth-maintaining unit relative to the frame, a second depth-maintenance unit (14, 15a), and at least one soil working tool (16), which is adapted to be connected to means (23) for supplying hydraulic fluid to the hydraulic system.
Abstract
An agricultural implement, for working soil across which the agricultural implement travels or is towed, comprises a frame (10), a first depth maintaining unit (12a, 12b), comprising a first hydraulic actuator (13a) for adjusting the height of the first depth maintaining unit relative to the frame, a second depth maintaining unit (14), comprising a second hydraulic actuator (15a) for adjusting the height of the second depth maintaining unit relative to the frame, at least one soil working tool (16), and a hydraulic system (17) comprising the hydraulic actuators (13a, 15a), which is adapted to be connected to means (23) for supplying hydraulic fluid to the hydraulic system. A first side of the first hydraulic actuator (13a) communicates with a first side of the second hydraulic actuator (15a) and measuring means (18, 19) are arranged to provide a measured value corresponding to a first amount of hydraulic fluid occurring on said first sides.

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Patent

Depth control for a seed planting system

Shane Houck
TL;DR: In this article, a planting system including a plurality of seeding row assemblies, each having components maintained at a controlled elevation, is described. But, it is not shown how to adjust the elevation of the tillage unit relative to the seeding unit to a desired set point.
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TL;DR: In this article, an agricultural tillage implement includes a main section including a hitch extending in a travel direction, a plurality of foldable wing sections coupled with the main section, a ground engaging tilling elements, a wheel assembly and a control system.
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Agricultural implement and method of controlling an agricultural implement

Crister Stark
TL;DR: In this paper, a method for adjusting an agricultural implement's orientation is described, which is based on a series of orientation values corresponding to the orientation of the agricultural implement in at least one vertical plane.
References
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Patent

Automatic depth control system and method

TL;DR: In this article, an automatic depth control system is described, which includes a console and remote controller mounted in the tractor cab, power beyond valving, and depth sensors, either ground contact or non-ground contact, mounted on the frame of the implement.
Patent

Self leveling towed implement

TL;DR: In this article, an implement has a tongue used to tow the implement that can be raised or lowered with respect to the rest of the implement by a hydraulic cylinder, and the raising and lowering ports of the cylinder are connected to two hydraulic accumulators to permit the tongue to flex up or down while the implement is towed through the field.
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Directly actuated depth control

TL;DR: In this paper, a depth control system particularly useful for single point depth control on an agricultural implement includes a valve and actuator mounted directly to the pivotal connection areas of a hydraulic cylinder that controls height.
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Ground-surface adaptation device for attachments on harvesting machines

TL;DR: In this paper, the authors proposed a method for adapting attachments on harvesting machines to the ground surface, in particular for combine harvesters and forage harvesting machines, which is extremely accurate and also cost-effective.
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Frame leveling system for tillage implements

TL;DR: In this article, a fluid circuit is connected to a fluid actuator for controlling forces exerted between a hitch member and the implement main frame and it is operable in a working mode to exert a resilient biasing force on the hitch member thus enabling pivotal floating motion of the hitch members while simultaneously countering force moments applied to the main frame by the ground-working tool.