"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
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| Number | Title | Issue Date |
| 5771979 | Bi-directional moldboards supports used in moldboard plows to carry out conservation tillage In accordance with the present invention, there is provided a tillage conservation plow (100) for plowing the earth and exposing, on the surface of the earth, weeds and past harvest residue. The plow includes a hitch frame (1) and a framework (2) connecte... | 06/30/1998 |
| 5454434 | Agricultural plow An agricultural plow comprising a frame beam adapted to be inclined relative to the direction of plowing, and a plurality of tilling apparatus respectively connected to the beam by pivot connections, the pivot axis of each such pivot connection extending ... | 10/03/1995 |
| 5199503 | Plow The plow comprises a carrier frame (1) supporting a horizontally rotatable frame (3). The working members in the form of left- and right-handed plow bodies are fixed on the rotatable frame (3). The rotatable frame (3) is mounted in such a manner as to be ... | 04/06/1993 |
| 5135056 | Plough apparatus Plough apparatus comprising a wheeled support structure (10) that supports a plough beam (20) that is pivotable in a horizontal plane about the center of the support structure between first and second plough beam positions. The plough beam (20) carries a ... | 08/04/1992 |
| 4984638 | Plow with symmetrical bodies having concave vertical and horizontal cross-sections A plow having symmetrical mold-boards and bodies, the plow comprising a hitch 1 connected in particular by means of a pivot 3 and to a main frame 4 which is provided with a pivot 18 receiving a hydraulic actuator 17 whose action causes a beam 8 to pivot a... | 01/15/1991 |
| 4216730 | Side hill bed shaper and planter A cottonseed planter for planting cottonseed along a selected side of a raised bed is disclosed. The planter is adapted for two-way operation through the field and includes a tool bar frame having ground engaging means. Multiple seeders are supported on t... | 08/12/1980 |