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| Number | Title | Issue Date |
| 6681867 | Oscillating ground engaging tool A ground engaging tool that oscillates in a motion, relative to the ground, that is substantially vertically upward, and then downward and forward in a direction in which the apparatus is moved.... | 01/27/2004 |
| 5497837 | Apparatus for controlling down pressure on agricultural implements A soil treatment apparatus is provided having a main frame to be drawn by a towing vehicle over subjacent soil, a subframe, a structure for mounting the subframe to the main frame for vertical movement relative thereto between first and second position, a... | 03/12/1996 |
| 4977964 | Resilient planar framework for supporting multiple groundworking tools A normally rigid planar framework for mounting a large number of ground working tools is made resilient to accommodate the torsional forces exerted on the rigid structural members of the framework as it passes over uneven ground and the tools are subjecte... | 12/18/1990 |
| 4426940 | Implements for injecting substances below the surface of the soil A machine for burying slurry, sewage, or other soil-improving fluids has a hollow straight forward-leaning tine which carries at its bottom end an arched, forward-sloping delta-shaped shoe for lifting the soil into the form of a tunnel. The hollow interio... | 01/24/1984 |
| 4328869 | Implement with wing lift including toggle links and roller An implement with a wing lift wherein the wing is displaceable from a wheel supported floating, ground working position approximately 180° to a transport position where it lies inverted on the implement. The wing lift includes a pair of toggle links with... | 05/11/1982 |
| 4291638 | Agricultural implements The present invention provides in an agricultural ground treating device particularly but not exclusively a seed drill arranged to be towed over the ground and having a plurality of ground engaging implements, means for causing all of the implements to en... | 09/29/1981 |
| 4114695 | Rotary harrow with pivotable coupling assembly An implement has an elongated frame that extends transverse to the direction of travel and soil-working members rotatably mounted on a portion of the frame that depends from spaced apart, forward and rear frame beams. A coupling assembly having coupling p... | 09/19/1978 |
| 4049061 | Rotary harrows A cultivating implement or rotary harrow has two groups of soil working members mounted on upwardly extending shafts that extend transverse to the direction of operative travel. The groups of soil working members are adjustably linked to an elongated fram... | 09/20/1977 |
| 4044842 | Flexible multi-section implement An implement frame construction includes rigid implement frame sections positioned in side-by-side relation and joined by a linkage system which permits the sections to universally flex within desired limits with respect to each other without substantial ... | 08/30/1977 |
