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US 4,391,221 AGranted
Method for mechanical milk removal
AssigneeBiomelktechnik Hoefelmayr & Co.
InventorsTilman Hoefelmayr, Jakob Maier
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AssigneeBiomelktechnik Hoefelmayr & Co.
InventorsTilman Hoefelmayr, Jakob Maier
Estimating the term…
A method for mechanical milk removal in which a predetermined underpressure is applied to the interior of a milking cup applied to a teat to remove the milk and, if desired, a pulsation of a teat rubber is effected at a predetermined frequency and intensity, and while the milking cup is in place the teat is stimulated for a predetermined interval prior to the principal milking operation. The invention also relates to an apparatus for executing the method comprising a pulsator connected on the one hand to an underpressure source and on the other hand to pulsator lines supplying the pulse spaces of the milking cup, the pulsator having two membranes which are interconnected by a linkage and which subdivide each pressure cell into two separate spaces, two spaces of which communicate with one another via a throttle, if desired adjustable, while the two other spaces of which are adapted to be selectively connected via a control unit to the underpressure source, and further comprising a switch-over device which is connected to the linkage and which serves to selectively connect one or two group(s) of pulsator lines to the underpressure source and to fresh atmospheric air.
In a method for mechanical milk removal in which a predetermined underpressure is applied to the interior of a milking cup applied to a teat to remove the milk and a pulsation of a teat rubber is effected at a predetermined frequency and intensity, and while the milking cup is in place the teat is stimulated during a stimulation phase for a predetermined interval prior to the principal milking operation, the improvement comprising wherein no milk is removed for an interval in the range of 40 to 90 seconds after commencement of the stimulation phase and only immediately subsequently thereto is milk removal begun and wherein the pulsation frequency during the stimulation phase is higher than in the milk removal phase.
In a method for mechanical milk removal in which a predetermined underpressure is applied to the interior of a milking cup applied to a teat to remove the milk and a pulsation of a teat rubber is effected at a predetermined frequency and intensity, and during a stimulation phase while the milking cup is in place the teat is stimulated for a predetermined interval prior to the principal milking operation, the improvement comprising wherein during the stimulation phase the pulsation of the teat rubber occurs at a frequency which is at least 50% higher than the frequency during the principal milking operation and wherein during this period the maximum pulse underpressure in the interior of the milking cup is selected in response to the underpressure in the interior of the teat rubber and the fold-in pressure of the teat rubber such that it is in the range which satisfies the following formula:
In an apparatus for mechanical milk removal in which a predetermined underpressure is applied to the interior of a milking cup applied to a teat to remove the milk, comprising a pulsator connected on the one hand to an underpressure source and on the other hand to pulsator lines supplying the pulse spaces of the milking cup, said pulsator having two membranes each located inside a pressure capsule, said membranes being interconnected by a linkage and which subdivide each pressure capsule into two separate spaces, two spaces of which communicate with one another via a first adjustable throttle, while the two other spaces of which are adapted to be selectively connected via a control unit to the underpressure source, and further comprising a switch-over device which is connected to said linkage and which serves to selectively connect at least one group of pulsator lines to the underpressure source and to fresh atmospheric air, the improvement comprising wherein a shunt line including a first controllable port is provided in a main line supplying said underpressure source, wherein a bypass line is provided which circumvents said adjustable throttle, wherein a second adjustable throttle is provided in said bypass line, and wherein there is provided in the main line a first cut-off device which is adapted to be closed during the stimulation phase and is circumvented by the shunt line and there is provided in the bypass line a second cut-off device which is adapted to be closed during the main milking operation.
In an apparatus for mechanical milk removal in which a predetermined underpressure is applied to the interior of a milking cup applied to a teat to remove the milk, comprising a pulsator connected on the one hand to an underpressure source and on the other hand to the pulsator lines supplying pulse spaces of the milking cup, the improvement comprising wherein a first and second solenoid valve are disposed in a line extending from the underpressure source to the pulsator lines, wherein a bypass line is provided which includes an adjustable throttle and that circumvents said first solenoid valve, and wherein in its first position the second solenoid valve closes the connection between the underpressure source and the pulsator lines and connects these to the atmosphere and in its second position connects the pulsator lines to the underpressure source, while interrupting the connection between the pulsator lines and the atmosphere.
In a method for mechanical milk removal in which a predetermined underpressure is applied to the interior of a milking cup applied to a teat to remove the milk and a pulsation of a teat rubber is effected at a predetermined frequency and intensity, and while the milking cup is in place the teat is stimulated during a stimulation phase for a predetermined interval prior to the principal milking operation, the improvement comprising wherein no milk is removed for an interval in the range of 40 to 60 seconds after commencement of the stimulation phase and only immediately subsequently thereto is milk removal begun and wherein the pulsation frequency during the stimulation phase is higher than in the milk removal phase.
Dependencies are inferred from the claim text.