Earth working – Alternating for right or left hand operation – Axially rotatable implement
Patent
1984-12-31
1987-03-03
Stouffer, Richard T.
Earth working
Alternating for right or left hand operation
Axially rotatable implement
172647, 91420, 91516, 91517, 92 131, 92110, 92174, A01B 342, F01B 3100
Patent
active
046468498
ABSTRACT:
A reversing and adjustment mechanism, especially for a reversible plough adapted for hydraulically adjustable furrow width and hydraulic reversing of the plough, wherein the reversing and adjustment mechanism comprises a hydraulic cylinder (8) with a "hydraulic memory" for adjustment of the furrow width. The oil chambers on both sides of the ordinary piston (15) in the adjustment cylinder (8) communicate with a reservoir (24) via two pilot-controlled check valves (26, 25) with open passage toward the adjustment cylinder (8) and a second direction-control valve (10). The chamber (31) in the adjustment cylinder (8) between the rear head and a freely movable piston (17) communicates on the one hand with a hydraulic cylinder (7) for reversing the plough, preferably with the rod end thereof, via a first check valve (14) with open passage toward the reversing cylinder (7), and on the other hand communicates with the reservoir (24) via a flow-control valve (28) and a first direction-control valve (9). The reversing cylinder (7), on the end opposite its rod; i.e., preferably on the piston end, communicates on the one hand with the rod end of the adjustment cylinder (8) via a pilot-controlled check valve (36) with open passage toward the reversing cylinder (7) and a pilot-controlled check valve (32) with open passage toward the adjustment cylinder (8), and on other hand communicates with the reservoir (24) via a pilot-controlled check valve (36), the reversible flow-control valve (28) and a first direction-control valve (9).
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Brown Terrence L. B.
Kverneland A/S
Stouffer Richard T.
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