Planting – Drilling – Lister units
Patent
1977-01-21
1982-01-19
Bratlie, Steven A.
Planting
Drilling
Lister units
111 59, 111 60, 111 61, 111 62, 111 66, 111 68, 111 86, 172176, 172397, 172462, 172484, 172672, 172705, 172706, A01C 506
Patent
active
043111041
ABSTRACT:
A press grain drill includes a plurality of opener units mounted on an elongated tow tube and including a plurality of elongated, pivotably coupled elements forming a pair of parallelograms which support a self-penetrating shovel and a press wheel respectively. A first one of the parallelograms permits up and down movement of the shovel relative to the tow tube while maintaining the pitch of the shovel relative to the ground substantially constant. A second one of the parallelograms responds to each movement of the shovel to move the press wheel in the same direction and relative to the shovel so as to maintain the depth of the shovel within the ground substantially constant. Whenever the tow tube which is coupled by pairs of parallel links to an elongated main frame tool bar is raised relative to the tool bar for towing, a lift tube coupled to the links via bracket numbers engages the opener units to lift them relative to the tow tube.
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John Deere Operators Manual Om-A33-554, 9/55 "Bedders & Planters," p. 24 and p. 60.
Schreiner Lester D.
Steilen Ronald M.
Bratlie Steven A.
Deere & Company
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