Bi-fold hinge for a folding toolbar

Details Bi-fold hinge for a folding toolbar Bi-fold hinge for a folding toolbar

1985-07-23

1986-12-30

Pekar, John A.

Land vehicles

Wheeled

Articulated vehicle

16348, 16338, 16367, 172311, A01B 7300

Patent

active

046324178

ABSTRACT:
A toolbar having a fixed center section and folding wing sections is mounted to and drawn by a tractor. The wings are each connected to the center section by a bi-fold hinge assembly which allows the wing either to fold upwardly for transport or to a forward position. The forward movement is automatically effected in response to the turning of the tractor to allow the toolbar to clear a drawbar-mounted drawn implement positioned aft of the toolbar. A lock pin is placed by the operator in one of two positions to determine the desired mode of operation.

REFERENCES:
patent: 3201821 (1965-08-01), Ruckstuhl
patent: 3548954 (1970-12-01), Lindemann
patent: 4147305 (1979-04-01), Hunt
patent: 4172537 (1979-10-01), Gandrud et al.
patent: 4453601 (1984-01-01), Orthman et al.

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