Earth working – Diverse tools – With independent means for vertical movement
Patent
1981-11-06
1984-04-24
Johnson, Richard J.
Earth working
Diverse tools
With independent means for vertical movement
172468, 172484, 172166, A01B 1308
Patent
active
044442718
ABSTRACT:
An agricultural tillage implement adapted to be pulled by a vehicle comprises a main frame adapted to carry ground working tools. The main frame is supported on wheels rotatably mounted thereto. A sub-frame carrying ground working tools is mounted to the main frame by means of a lift mechanism. The lift mechanism includes a single horizontal rock shaft mounted to the main frame for rotation about its axis. A hydraulic cylinder rotates and holds the rock shaft at determined rotational displacements. Shaft arms affixed to the rock shaft are pivotally connected to the sub-frame. Connecting arms are rotatably connected to the main frame at one end and are rotatably connected to the sub-frame at another end. Rotation of the rock shaft moves the shaft arms, connecting arms, and sub-frame in a four-bar linkage motion to raise and lower the sub-frame while maintaining the sub-frame in a generally horizontal position for all working depths. Ground working tools carried on the sub-frame are adjusted as to depth independently of ground working tools carried on the main frame.
REFERENCES:
patent: 1557109 (1925-10-01), Vandenberg
patent: 1944275 (1934-01-01), Sandeen
patent: 2593028 (1952-04-01), Hendrick
patent: 2671973 (1954-03-01), Bensel
patent: 2701509 (1955-02-01), Rolfes
patent: 3757871 (1973-09-01), Maust
patent: 4243104 (1981-01-01), Sipos
patent: 4245706 (1981-01-01), Dietrich
patent: 4313503 (1982-02-01), Good
patent: 4315547 (1982-02-01), Rau
Turbo-Tiger, Advertizing Brochure of DMI, Inc., Goodfield, IL.
DMI Inc.
Johnson Richard J.
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