Folding sequence control for wing fold implements

Abstract From the Canadian patent

Abstract of the Disclosure, 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 …