Folding sequence control for wing fold implements

Details Folding sequence control for wing fold implements Folding sequence control for wing fold implements

A - Human Necessities

01

B

97/125

A01B 73/00 (2006.01) A01B 73/04 (2006.01)

Patent

CA 1160886

FOLDING SEQUENCE CONTROL FOR WING FOLD IMPLEMENTS Abstract of the Disclosure A hydraulic control for a folding tool bar which has a transport width less than half the field working width. Restric- tors 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 com- plete 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.

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