Control for a milker unit support

Animal husbandry – Milkers – With signals – indicators – registers – and timers

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Details

A01J 300

Patent

active

053797221

ABSTRACT:
A support for positioning a milker unit beneath a cow has a shaft which is vertically movably mounted on a base. An arm on the shaft supports a milker unit beneath a cow. Air pressure is applied to the shaft to hold the shaft and arm at a desired vertical position. A control automatically adjusts the vertical position of the support so that when the milker unit is attached to a cow's teats the weight of the milker unit is applied solely to the cow's teats. The control includes a pair of valves each connected to a supply of air under pressure. A first of the valves has an open position in which the amount of pressure applied to the support decreases and the support is permitted to lower. A second of the valves has an open position in which air from the supply moves the first valve from a normally closed position to the open position thereof. The control has a lever mounted on the arm for moving the second valve to the open position thereof when the milker unit applies force to the lever.

REFERENCES:
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patent: 3973520 (1976-08-01), Flocchini
patent: 3999518 (1976-12-01), Needham et al.
patent: 4652204 (1987-03-01), Arnette
patent: 4685422 (1987-08-01), Middel et al.
patent: 4936255 (1990-06-01), Pera
patent: 5042428 (1991-08-01), Van der Lely et al.

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