Planting – Drilling – Lister units
Patent
1983-10-25
1985-09-24
Hafer, Robert A.
Planting
Drilling
Lister units
111 88, A01C 506
Patent
active
045427054
ABSTRACT:
An apparatus for producing parallel-walled grooves in green areas and lawns. Slits which form the walls of the groove are produced by means of tools which are arranged at the periphery of a drum, or alternatively, on a rolling wheel body. Each tool comprises a pair of knives which produce the parallel slits or cuts. A cutting edge is provided, which extends between the knives and produces a transverse cut in the region of the groove. The cutting edge can simultaneously serve to eject the earth. Alternatively a clearance tyne, which also serves to lift the earth, can be arranged behind the knives in the direction of running. In accordance with a further embodiment, spring loaded runners are provided which are fixed to the frame of the apparatus and are located between knife carrying discs, i.e. between the grooves that are formed, or in the grooves that are formed, i.e. between the two knife carrying discs of a pair of knife carrying discs. These runners carry capping shares at their rear ends, with the capping shares being respectively aligned with the knife carrying discs of each pair and working in thegroove that is formed. The frame on which the knife carrying discs are journalled is vertically spring loaded relative to the machine frame and the lateral spacing of the knife carrying discs can be adjusted as required. The knife blades have a triangular shape with a steep flank and a shallow flank. The shallow flank forms the leading edge when the apparatus is used on soft ground, whereas the steep flank forms the leading edge when the apparatus is used on hard ground. Seed guide tubes direct the seed into the grooves that are formed and the outlet ends of the seed tubes lie in the direction of travel behind the capping shares. The apparatus can be used to renew green areas and lawns, it is however also possible in this manner to provide harvested stubble fields with between-season fruits without the need to break up the whole field.
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DeMille Danton
Hafer Robert A.
Wolf-Gerate GmbH
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