Abstract: Apparatus for adjusting the depth of operation of a ground working tool on an agricultural apparatus comprises a strap which extends across a plurality of separate frame sections of the apparatus and incorporates a chain coupling which passes around a pulley wheel having an axis of rotation which is horizontal and transverse to the movement of the strap to communicate horizontal movement of the strap to vertical movement of a thrust bar. The thrust bar acts upon the axle of ground wheels so as to adjust the position of the ground wheels relative to the frame section. The ground working tool supported by the frame section is therefore adjusted relative to the ground to increase or decrease the depth of operation on the ground. The ground working tool can comprise an air seed boot and the frame of the apparatus can comprise a plurality of separate sections pivotally connected together to accommodate variations in the terrain.

Abstract: A seed boot for pneumatic seeder or fertilizer assemblies includes a seed or fertilizer tube having an attaching bolt extending therethrough adjacent the base thereof and just above the splitting or separating saddle. A forwardly extending crease is formed within the rear of the tube and extends into the tube above the bolt thus dividing the seed and/or fertilizer into two equal streams which clear the bolt and then engage the saddle well down the sides thereof so that the seed and/or fertilizer is deflected outwardly under the wings of the sweep thus reducing the possibility of the seed and/or fertilizer from bouncing up into loose soil and therefore being wasted.

Abstract: A deep tillage cultivator consists of a center section and at least two wing sections one upon each side hingedly secured to said center section. The sections are wheel supported along a transverse center line and by a hitch assembly extending from the center section. Also, castor wheel assemblies extend forwardly from the outer wing sections on each side of said center section. Flexible fore and aft connections are provided between adjacent sections with a universal joint type of connection being provided between the sections to permit better flexibility to wide cultivators. Structure is provided to stabilize the universal type hinge connection prior to folding the sections for transport purposes.

Abstract: An implement shank is pivotally attached to the frame of the implement and normally is maintained in the soil by a heavy duty coil spring reacting between the shank and a support extending from the frame. The spring mount and shank holder are connected together so that if the shank trips due to striking an obstruction, the connection moves towards an over center line and if the obstruction is maintained, the connection moves over the over center line. When it passes over center, it engages a leaf spring extending from the frame which returns the connection back over center when the obstruction is passed whereupon the coil spring returns the implement into the ground. The coil spring is attached to a resilient member extending from the frame so that the shock load is absorbed as the implement returns to the ground engaging position, particularly when this return is somewhat rapid due to the heavy duty nature of the coil spring.