Coupling hook for the lower steering arms of a three-point attac

Details Coupling hook for the lower steering arms of a three-point attac Coupling hook for the lower steering arms of a three-point attac

1993-10-22

1995-08-15

Reese, Randolph A.

Earth working

With means to facilitate mounting of implement on motor vehicle

172439, 280504, 2804611, A01B 59043

Patent

active

054411173

ABSTRACT:
A coupling hook (5) for the lower steering arms (3) of a three-point attaching device of a tractor has a hook body (6) with a locking pawl (7). The pawl (7) is spring-loaded in the direction of the locking position. The locking pawl (7) is arranged in a recess (12) of the hook body (6) and projects through an aperture (13) into a bearing recess (10), which receives a bearing ball (11). For the purpose of supporting and guiding the locking pawl (7), the hook body (6) includes a first stop face (14), a second supporting stop (15) offset backwardly at a distance therefrom and a locking stop (16). In the locking position, the locking pawl (7) is supported on the looking stop (16) via a first supporting face (19), a second supporting face (21) and a locking face (22). The design is such that the contact between the locking face (22) and the locking stop (16) takes place below an imaginary connecting line (27) which is between the point of contact of the locking face (25) of the locking pawl (7) with the outer face (26) of the bearing ball (11), on the one hand, and the center (29) of the convex locking stop (16) on the other hand. An improved locking affect is ensured.

REFERENCES:
patent: 3195651 (1965-07-01), Todd
patent: 3404901 (1968-10-01), Rau
patent: 3807769 (1974-04-01), Thompson et al.
patent: 4241935 (1980-12-01), Vollmer et al.
patent: 4366967 (1983-01-01), Vollmer et al.
patent: 4415175 (1983-11-01), Kainer
patent: 4549744 (1985-10-01), Herr et al.
patent: 4944354 (1990-07-01), Langen et al.
patent: 5050684 (1991-09-01), Vollmer
patent: 5076369 (1991-12-01), Herchenbach

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