Drag harrow pressure adjusting device

Details Drag harrow pressure adjusting device Drag harrow pressure adjusting device

1978-11-17

1980-07-22

Stouffer, Richard T.

Earth working

Plural relatively movable tools

Plural tool groups relatively vertically movable because of...

172662, 172739, A01B 1908

Patent

active

042135060

ABSTRACT:
For use with a farm implement frame, a drag harrow pressure adjustment device which includes bracket members designed to pivotally mount implement frame arms to an implement frame beam. The frame arms have mounted thereto harrow sections containing harrow teeth for ground working. A spring member, in cooperation with bracket members, introduces variable degrees of pressure to the frame arms resulting in the capability to regulate the ultimate downward pressure exerted by the harrow teeth on the underlying terrain. When desired, the frame arms are raised and maintained, through an over-center arrangement, at elevations disengaging the harrow teeth from terrain contact.

REFERENCES:
patent: 830390 (1906-09-01), Whitehurst et al.
patent: 2142454 (1939-01-01), Needham
patent: 2725807 (1955-12-01), Sibert
patent: 2960169 (1960-11-01), Collins
patent: 3100018 (1963-08-01), Sokolowski
patent: 3532171 (1970-10-01), Kasten
patent: 3566974 (1971-03-01), Kopaska
patent: 3601202 (1971-08-01), Steffe
patent: 3976145 (1976-08-01), Blair
patent: 3991831 (1976-11-01), Foster
patent: 4126190 (1978-11-01), Wylie

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