Folding harrow frame

Details Folding harrow frame Folding harrow frame

1977-12-21

1979-02-06

Song, Robert R.

Land vehicles

Wheeled

Articulated vehicle

172311, B62D 5300, A01B 7300

Patent

active

041381343

ABSTRACT:
A foldable frame for agricultural implements, for example harrows, includes a draw bar having a rear extension and two side members rigid with the draw bar, an elongated support beam for carrying the agricultural implements, the beam having two side portions pivotably connected to each other at the center of the beam for folding in a horizontal plane, and two links, each pivotably connected at a front end to the draw bar side members, and pivotably connected at their rear ends to a central part of the two beam portions. The center of the beam is mounted on a sub-frame movable along the rear extension of the draw bar, this sub-frame being movable from a rear position in which this sub-frame and the links hold the two beam portions extended and aligned with each other to give a wide frame for holding the implements, and the sub-frame is movable forwardly along the draw bar extension to cause the beam portions to fold backwards from their connection with the sub-frame, until they reach a folded condition in which they extend rearwardly from the sub-frame when this is close to the front end of the draw bar.

REFERENCES:
patent: 3960221 (1976-06-01), Blair et al.
patent: 3982773 (1976-09-01), Stuffebeam
patent: 4056148 (1977-11-01), Blair
patent: 4066274 (1978-01-01), Adee
patent: 4088346 (1978-05-01), Schreiner

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