Abstract: The invention is directed to an integral coupling arrangement for coupling a trailing cart to a transverse toolbar. The cart is provided with two draft links extending forwardly from the cart that are pivotally coupled to the toolbar. A central hitch also extends forwardly from the cart and is coupled to the toolbar by a floating link. Pushing and pulling forces are applied through the draft links only. The central hitch carries the vertical weight applied by the cart.

Abstract: A hydraulic system includes a hydraulic pump which provides pressurized fluid at an output port as a function of pressure in a load sensing port, a hydraulic reservoir, and a load pressure sensing line connected to the load sensing port. A solenoid operated implement control valve controls fluid communication to and from a hydraulic function such as a cylinder. A supply control valve has a first position wherein the reservoir is communicated with the load sensing port and a second position wherein the pump output port is communicated with the load sensing port. A spring urges the valve member to its first position, and a solenoid is energizable to move the valve member to its second position. The solenoid is energized when the implement control valve is activated so that the supply control valve communicates pump pressure to the load sensing port and the pump will operate at full capacity whenever the second hydraulic function is operated.

Abstract: A forwardly-folding, tractor-drawn agricultural implement featuring a rear center frame and a pair of wing sections that may selectively occupy operating positions in which they are horizontally and transversely alined with each other but alined in that manner forwardly of the center, rear section. This rear section carries no agricultural tools and serves basically as a rear rolling support for the implement in both its operating position and in a transport position in which the wing sections are folded forwardly along opposite sides of a central telescopic tongue or hitch by means of which the rear section is connected to and supported on a tractor. When the implement is in its transport or folded position, the overall length of the machine may be shortened to bring the rear support wheels closer to the tractor.

Abstract: A forwardly foldable agricultural planter includes a hitch shiftable as wing sectons are moved between transport and operational configurations. Rigid link tow bars pivot about centrally positioned pivots permitting the hitch to be horizontally shifted between transport and operational positions to thereby realize positive drawn implement control in both configurations. A telescoping drawbar provides further implement support and control and either manual or automatic latching mechanisms can be provided to secure the folded wing sections in position.