Animal husbandry – Milkers – With signals – indicators – registers – and timers
Patent
1991-09-17
1992-11-10
Weiss, John G.
Animal husbandry
Milkers
With signals, indicators, registers, and timers
7386149, 73861, A01J 700, G01F 100
Patent
active
051614839
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to animal-milking machinery, and more particularly it relates to apparatus for determining the yield of milk by a milking machine.
DESCRIPTION OF THE PRIOR ART
There is known an apparatus for determining the milk yield by a milking machine (SU, A, 657260), comprising a housing accommodating in it the reception and measurement chambers, and a reciprocable hollow rod with a side opening and a float mounted on the rod, and also with a valve member mounted on the lower end of the rod and received in the measurement chamber. The upper end of the hollow rod is closed, and its lower end is open. The reception and measurement chambers are separated by a partition with a central window establishing communication between the chambers. As the hollow rod moves, the side opening of this rod moves beyond the housing of the milk metering device, and the valve in the measurement chamber operates. As the valve in the measurement chamber thus operates, the mobile rod activates the counter mechanism keeping the count of the successive portions or doses of milk.
However, as the valve operates to close off the window in the partition, there takes place unchecked addition of an amount of milk to the measurement chamber due to the arising differential of the vacuum-gauge pressure in the measurement chamber and the atmospheric pressure in the reception chamber, which introduces inevitable error in keeping the count of the successive doses of milk. Furthermore, an additional error is introduced into the counting of the successive doses of milk by the mechanical linkage between the movable hollow rod of the metering device and the counter keeping count of these successive doses. This known apparatus lacks the means for adjusting the metering device for optimized volumes of milk doses in the actual operational environment of the milking machine on dairy farms.
There is further known a device for determining the yield of milk by a milking machine (SU, A, 1345059), comprising a discrete float-type sensor for metering out successive doses of milk, including a reception chamber with the inlet and outlet pipes and a measurement chamber with the outlet pipe, separated by a partition with a window therein. The measurement chamber receives therein a float element mounted on a hollow rod having an opening through its side wall situated outside the reception chamber to communicate with the ambient atmosphere as the hollow rod moves to the preset position in the direction of the rising level of milk in the discrete sensor. The hollow rod carries a permanent magnet adjacent to its closed end, and a valve member adjacent to its open end, accommodated in the measurement chamber under the partition with the window. This known apparatus further comprises a milk receptable of which the first inlet pipe is connected with the outlet pipe of the measurement chamber of the discrete sensor and the second inlet pipe is connected with the outlet pipe of the reception chamber of this sensor, of which the inlet pipe is connected to the milk-conveying vacuum line of the milking machine. The outlet pipe of the milk receptacle is connected to the vacuum line of the milking machine. The known apparatus also comprises a computing unit, a pickup for summing up the successive doses of milk, having its leads connected to the first input and first output of the computing unit, mounted in the area to which the permanent magnet mounted on the hollow rod is lifted when the milk in the discrete sensor rises to the predetermined level.
This known apparatus is devoid of the means for monitoring the variation of the vacuum-gauge pressure in the milking machine, which tends to introduce an error in determining the optimized portions of milk.
SUMMARY OF THE INVENTION
The present invention has for its object to create an apparatus for determining the yield of milk by a milking machine, which should account for unchecked portions of milk in the measurement chamber at variations of the vacuum-gauge pressure in the milking unit,
REFERENCES:
patent: 4485763 (1984-12-01), Icking
patent: 5012762 (1991-05-01), Moskvin
patent: 5016569 (1991-05-01), Moskvin
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