Planting – Drilling – Frame and planting-element arrangement
Patent
1990-10-10
1991-11-19
Taylor, Dennis L.
Planting
Drilling
Frame and planting-element arrangement
111 61, 111 66, 111926, 172464, A01C 506, A01B 6332
Patent
active
050656813
ABSTRACT:
An improved down pressure arrangement for an implement such as a multi-section grain drill having fixed-height section frames with corresponding gangs of opener assemblies. The opener assemblies of each gang are yieldingly biased downwardly by a spring and bracket structure operably connected to a rockshaft. One rockshaft per gang is provided, and each rockshaft is controlled by a single down pressure adjusting cylinder. The cylinders are connected in parallel and to a pressure regulator to provide adjustable and uniform average opener down pressure across the width of the drill for more contant opener depth in irregular ground conditions. Tension links connected to the bracket structure permit the opener assemblies to be raised from a ground-working position to a transport position.
REFERENCES:
patent: 3494427 (1970-02-01), Greig et al.
patent: 3561541 (1971-02-01), Woelfel
patent: 3747422 (1973-07-01), Rikli
patent: 3749035 (1973-07-01), Cayton et al.
patent: 4044697 (1977-08-01), Swanson
patent: 4149475 (1979-04-01), Bailey et al.
patent: 4291638 (1981-09-01), Renwick
patent: 4422511 (1983-12-01), Poggemiller et al.
patent: 4648466 (1987-03-01), Baker et al.
Deere & Company
Taylor Dennis L.
Thompson Jeffrey L.
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