Folding frame structure for agricultural implements

Details Folding frame structure for agricultural implements Folding frame structure for agricultural implements

1975-12-04

1976-09-28

Song, Robert R.

Land vehicles

Wheeled

Extensible

172456, B62B 1100

Patent

active

039827739

ABSTRACT:
A tractor drawn agricultural implement of the folding wing type having right and left toolbar frames, the inner ends of which are pivoted to a tongue or drawbar for horizontal swinging movement about closely spaced vertical axes between extended operative positions of end-to-end alignment and folded positions wherein the frames lie close to each other in trailing relationship with respect to the drawbar. The outer ends of the frames are independently supported upon lift wheels of the caster type which do not leave the ground during swinging movement of the frames. A hydraulic cylinder on the drawbar has a plunger which operates through the medium of a pair of thrust links to swing the frames between their two extreme positions. Latch means normally maintains the frames extended but a cam element on the plunger trips the latch means at the commencement of the plunger stroke, thereby freeing the frames for movement to their folded positions.

REFERENCES:
patent: 2973818 (1961-03-01), Marvin
patent: 3162459 (1964-12-01), Marmorine
patent: 3428333 (1969-02-01), Nelson
patent: 3606848 (1971-09-01), Dobbs

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