Earth working – With weight
Patent
1976-03-04
1978-07-25
Johnson, Richard J.
Earth working
With weight
172700, 172768, 172719, A01B 1308
Patent
active
041024079
ABSTRACT:
Reforestation tillage mechanism comprising at least one pivotable suspension frame; at least one blade holder shank having a free upper end and being freely pivotable with an intermediate portion thereof in a plane, the main axis of the shank being substantially normal to the axis about which the frame can pivot; at least one, substantially straight cutter blade removably and adjustably mounted to a lower portion of the shank, to be partly lowered into the soil, defining an angle of about 120.degree. to 155.degree., downwardly inclined with respect to the direction of haulage of the tiller but opposite thereto; at least one pair of substantially parallel tiller blades exchangeably mounted on the shank, behind the cutter blade with respect to the direction of haulage, sloping with respect thereto, and defining an angle of about 10.degree. to 40.degree., upwardly inclined toward the rear free ends of the tiller blades with respect to the direction of haulage; the frame, shank, cutter blades and tiller blades constituting one or more tiller mechanisms; and a mechanism for attaching the latter to stationary portions of the tiller by the intermediary of a three-point hitch with freedom of selective pivotal and angular movement with respect to the stationary tiller portions and the soil; whereby the blades normally till the soil but some large stump in the soil can divert the tiller mechanism(s) upwardly about the attaching mechanism, so that the blades are at least partly lifted out of the soil, and then released to drop by their weight, to continue the tilling without any breakage or trouble.
REFERENCES:
patent: 1144176 (1915-06-01), Desy
patent: 2569556 (1951-10-01), Collins
patent: 2633792 (1953-04-01), Haines
patent: 3002574 (1961-10-01), Padrick
patent: 3188988 (1965-06-01), Peck
Danszky Istvan
Szecska Dezso
Erdeszeti Tudomanyos Intezet
Johnson Richard J.
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