Coupling and lifting system for an implement, in particular an a

Details Coupling and lifting system for an implement, in particular an a Coupling and lifting system for an implement, in particular an a

1990-07-13

1992-03-03

Reese, Randolph A.

Earth working

Automatic power control

Land leveller type

172448, 172826, 172 47, 172273, 172239, 91363R, 91530, 91534, E02F 376, A01B 63111, A01B 59048

Patent

active

050924095

ABSTRACT:
A system includes two lower articulated longitudinal arms (6, 7) provided on their front ends with two bottom hitching points (8, 9), and an upper arm (10) in the middle, for hitching an implement at a third point; valves for controlling the rise and descent of the two lower arms and of the upper arm are provided, and the implement (3) is equipped with hitching members (11) corresponding to the three point hitch of a tractor; a rigid intermediate support frame (12) is provided for connection between the implement and the arms (6, 7, 10); the frame includes two bottom lateral points (13, 14) and one top middle point (15) for hitching the implement, and two lateral top points (16, 17) intened to be connected to the third top hitching point (10) of the tractor by connection jacks of variable length; the two lower arms (6, 7) are independent and can assume different inclinations, and the two lower lateral portions (22, 23) of the frame (12) are hitched to the two bottom points (8, 9), the assembly being such that the implement (3) and the frame (12) can oscillate about a virtual longitudinal axis (B).

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Bosch Hydraulics, Theory and Applications, 1984, p. 238.

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