Earth working – With actuator adapted to lift tool for transport on wheeled... – Central group liftable vertically – side groups movable inwardly
Patent
1977-01-21
1978-11-21
Johnson, Richard J.
Earth working
With actuator adapted to lift tool for transport on wheeled...
Central group liftable vertically, side groups movable inwardly
172458, 172484, A01B 5104
Patent
active
041261895
ABSTRACT:
A folding tool carrier to be attached to a tractor and to carry an array of cultivating tools or implements. The carrier includes three bars forming a central section and a wing section at each side of the central section. Each wing section is connected to the central section by inner and outer swing arms to function as a parallelogram when the wings are lifted and retracted above the central section. The central section, the wings and the arms, are placed in a common vertical transverse plane to provide for a compact unit which may be carried immediately behind a tractor.
To accomplish this, the inner arms are above and the outer arms are below the central and wing sections when the wing sections are extended. A comparatively short crown bar is mounted upon and above the central section and an inner swing arm is pivotally attached to each end of this crown bar to pivotally connect with the inner end of the adjacent wing section. An outer swing arm is pivotally attached to each end of the central section to pivotally connect to the adjacent swing arm near its outer end. Hydraulic cylinders are mounted upon the crown bar to connect with the inner swing arms to actuate each wing section and to lower the wing to an extended position in alignment with the central section or to raise this wing to a retracted position above the central section.
REFERENCES:
patent: 3593805 (1971-07-01), Rau
patent: 3797580 (1974-03-01), Roth
German Printed App. No. 2,411,489, Rau, 9/25/75.
Graber Industries, Inc.
Johnson Richard J.
Lowe Frank C.
Van Valkenburgh Horace B.
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