Lifting device, particularly a front lift for an agricultural tr

Earth working – Mast type hitch – With auxiliary vertical adjustment

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Details

172680, A01B 59043, B60D 100

Patent

active

060623217

ABSTRACT:
A lifting device comprising: a backframe (1) equipped at its bottom with a pair of arms (4); lifting element (R) between the pair of arms (4) and the backframe (1), and two forearms (10a) mounted on each side of the pair of arms (4) on an articulation spindle (11), each forearm comprising an attachment bracket (13) and, at the opposite end, an extension (15) beyond the articulation spindle (11). The end of the extension (15) has a recess (16) which is open in the direction away from the attachment bracket. A stop connected to the pair of arms comprises a transverse spindle (20) equipped, over part of its length and of its periphery, with a radial bulge (E). When the bulge (E) is housed in the recess (16), the forearm (10a) is immobilized relative to the pair of arms (4), whereas when the bulge is out of the recess (16), a limited angular excursion of the forearm (10a) relative to the pair of arms (4) is possible.

REFERENCES:
patent: 2734438 (1956-02-01), Todd
patent: 3065977 (1962-11-01), Virtue et al.
patent: 4062560 (1977-12-01), Mueller, Jr. et al.
patent: 4216975 (1980-08-01), Schafer
patent: 4221399 (1980-09-01), Berg
patent: 4393942 (1983-07-01), Mijot et al.
patent: 5542477 (1996-08-01), Defrancq

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