Wing fold implement and folding sequence control therefor

Details Wing fold implement and folding sequence control therefor Wing fold implement and folding sequence control therefor

1980-07-23

1982-03-23

Stouffer, Richard T.

Earth working

Miscellaneous

91532, 172456, A01B 7300

Patent

active

043208053

ABSTRACT:
A hydraulic control for a folding tool bar which has a transport width less than half the field working width. Restrictors are added in series in the right-hand folding lines to cause the left-hand outrigger to fold to the transport position first. A one-way plunger operated ball check valve located in the hinge area between the main frame and an outrigger frame bypasses the restrictors for the first five degrees of fold and for the complete unfold cycle. The outriggers can therefore be lifted together at the start of the fold cycle during turns in the headlands. For complete folding to the transport position the left-hand outrigger folds first with the end of the right-hand outrigger positioned above it. The ball check valve causes the right-hand outrigger to unfold out of the path of the left-hand outrigger during the unfolding cycle.

REFERENCES:
patent: 2940262 (1960-06-01), Pfitzenmeier
patent: 4030551 (1977-06-01), Boetto et al.
patent: 4046203 (1977-09-01), Ward
patent: 4151886 (1979-05-01), Boetto et al.
patent: 4207951 (1980-06-01), Wilcox et al.

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