Automatic coupling device to connect tractor and tractor-drawn m

Fluid handling – With casing – support – protector or static constructional... – Vehicle

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Details

13761404, 285 9R, 285306, 2511497, F16L 3728

Patent

active

043710042

ABSTRACT:
An automatic coupling device to connect a hydraulic system tractor and a tractor-drawn device hydraulic system comprises a panel secured on the tractor-drawn device and a body mounted on the tractor. The panel accommodates receiving unions with shut-off valves. The body has blind bores accommodating hollow plungers each fitted with a shut-off valve at the end face operatively engaging the union. In each of the bores, the corresponding the plunger defines a bottom chamber, the bottom chambers communicating with each other and with a branch of a pressure port provided in the body. An aperture is provided in the side wall of one of the plungers, at the end face opposite to that operatively engaging the union, to communicate the hollow of this plunger with the pressure port, and a similar aperture is provided in the side wall of the other plunger to communicate its hollow with a drain port provided in the body.

REFERENCES:
patent: 2625168 (1953-01-01), Charlson
patent: 2887124 (1959-05-01), Mehl
patent: 3233549 (1966-02-01), Howe
patent: 3326579 (1967-06-01), Fowler
patent: 3826522 (1974-07-01), Dowes

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