Multiple-section agricultural implement

An agricultural implement adapted to be moved by a vehicle in a forward direction of travel, the agricultural implement comprising:

• a first frame section;
• a first ground-engaging tool coupled to the first frame section and configured to operate at a first pre-selected operating depth;
• a second frame section coupled to the first frame section forward of the first ground-engaging tool, wherein positioning of the second frame section is dependent upon positioning of the first frame section;
• a second ground-engaging tool coupled to the second frame section;
• an electro-hydraulic controller configured to receive a source of hydraulic pressure;
• a first extendable and retractable cylinder in fluid communication with the electro-hydraulic controller and coupled to the first frame section and the second frame section, the first extendable and retractable cylinder configured to move the second ground-engaging tool between a second ground-engaging tool transport position and a second pre-selected operating depth;
• a third frame section coupled to the first frame section rearward of the first ground-engaging tool, wherein positioning of the third frame section is dependent upon positioning of the first frame section;
• a third ground-engaging tool coupled to the third frame section;
• a second extendable and retractable cylinder in fluid communication with the electro-hydraulic controller and coupled to the first frame section and the third frame section, the second extendable and retractable cylinder configured to move the third ground-engaging tool between a third ground-engaging tool transport position and a third pre-selected operating depth;
• and
• a depth control device having at least one sensor configured to sense an operating depth of the second ground-engaging tool, the at least one sensor being operatively coupled to the electro-hydraulic controller, wherein the electro-hydraulic controller receives from the depth control device an input signal based on a signal from the at least one sensor and controls at least one of the lift device and the first extendable and retractable cylinder to compensate for movement of the first frame section as needed to maintain the second ground-engaging tool substantially at the second pre-selected operating depth.

An agricultural implement adapted to be moved by a vehicle in a forward direction of travel, the agricultural implement comprising:

• a first frame section;
• a first ground-engaging tool coupled to the first frame section;
• an electronic controller configured to receive a source of electric power;
• a lift device in communication with the electronic controller and coupled to the first frame section, the lift device configured for raising and lowering the first frame section with respect to the ground to move the first ground-engaging tool between a first ground-engaging tool transport position and a first pre-selected operating depth;
• a second frame section coupled to the first frame section forward of the first ground-engaging tool, wherein positioning of the second frame section is dependent upon positioning of the first frame section;
• a second ground-engaging tool coupled to the second frame section;
• an electronic actuator in communication with the electronic controller and coupled to the first frame section and the second frame section, the electronic actuator configured to move the second ground-engaging tool between a second ground-engaging tool transport position and a second pre-selected operating depth;
• and
• a depth control device having at least one sensor configured to sense an operating depth of the second ground-engaging tool, the at least one sensor being operatively coupled to the electronic controller, wherein the electronic controller receives from the depth control device an input signal based on a signal from the at least one sensor and controls at least one of the lift device and the electronic actuator to compensate for movement of the first frame section as needed to maintain the second ground-engaging tool substantially at the second pre-selected depth.