Grain drill furrow opening assembly

Details Grain drill furrow opening assembly Grain drill furrow opening assembly

1978-03-16

1980-07-29

Burr, Edgar S.

Planting

Drilling

Lister units

111 62, 111 87, 111 88, A01C 506

Patent

active

042145376

ABSTRACT:
A seed drill has a frame, a transverse hopper and a series of triple disc coulters mounted on the frame below the hopper. The coulters are each mounted on the frame by a parallelogram linkage which maintains the proper relative positions of the front and rear discs of the coulters at different penetration depths and permits the maximum transport height of the coulters.

REFERENCES:
patent: 702402 (1902-06-01), Chaplin
patent: T862011 (1969-05-01), Koronka et al.
patent: 2004416 (1935-06-01), Orelind
patent: 2031640 (1936-02-01), Geraldson
patent: 2297384 (1942-09-01), Benjamin
patent: 2713836 (1955-07-01), Ajero
patent: 2733646 (1956-02-01), Sheffield
patent: 2997117 (1961-08-01), Paige
patent: 3705560 (1972-12-01), Lappin
patent: 3749035 (1973-07-01), Cayton et al.
patent: 3845730 (1974-11-01), Koronka et al.

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