WO1984000874A1 - Milking machine - Google Patents

Milking machine Download PDF

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Publication number
WO1984000874A1
WO1984000874A1 PCT/SE1983/000302 SE8300302W WO8400874A1 WO 1984000874 A1 WO1984000874 A1 WO 1984000874A1 SE 8300302 W SE8300302 W SE 8300302W WO 8400874 A1 WO8400874 A1 WO 8400874A1
Authority
WO
WIPO (PCT)
Prior art keywords
teat cup
room
vacuum
teat
cup liner
Prior art date
Application number
PCT/SE1983/000302
Other languages
French (fr)
Inventor
Lennart Soederman
Sven-Aoke Nordegren
Original Assignee
Alfa Laval Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfa Laval Ab filed Critical Alfa Laval Ab
Priority to AU19410/83A priority Critical patent/AU1941083A/en
Publication of WO1984000874A1 publication Critical patent/WO1984000874A1/en
Priority to DK211684A priority patent/DK211684A/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J5/00—Milking machines or devices
    • A01J5/04—Milking machines or devices with pneumatic manipulation of teats
    • A01J5/08—Teat-cups with two chambers
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J5/00—Milking machines or devices
    • A01J5/007—Monitoring milking processes; Control or regulation of milking machines

Definitions

  • This invention relates to a milking machine comprising teat cups and in these ones arranged teat cup liners, the room inside the teat cup liner in each teat cup being connected with a vacuum source and the room between the teat cup and teat cup liner being connected with a pulsator that switches between suction phase and massage phase.
  • German patent publication No. 1.245.201 is previously known a milking machine working at overpressure. Due to the special design of the machine with a pump cylinder in which a plunger is moving to and fro for generating overpressure and vacuum and to the occurence of a valve in the line between the pump cylinder and the milk collecting receptacle, which valve has a closed position in one phase and an open position in another phase, the apparatus seems to give a vacuum in the room between the teat cup liner and the teat cup that could be stronger than the vacuum in the room inside the teat cup liner.
  • the room between the teat cup and the teat cup liner is arranged to be intermittently under a pressure that is higher than the atmospheric pressure, and intermittently under a vacuum that is stronger than that existing in the room inside the teat cup liner, at the same time as this room is arranged to be under a vacuum that is essentially constant.
  • Fig. 1 shows a teat with a teat cup put on it in section during the suction phase
  • Fig. 2 shows a teat with a teat cup put on it during the massage phase.
  • Fig. 1 and 2 disclose a teat cup 1 fastened onto a teat 2.
  • the teat cup comprises a teat cup liner 3 and two different channels 4, 5.
  • One 4 of the channels is under essentially constant vacuum and is in connection with the room 6 Inside the teat cup liner 3 such that it carries milk from the teat.
  • the second channel 5 is in connection with the room 7 between the teat cup and the teat cup liner and is furthermore connected with a pulsator that switches between vacuum (suction phase) and an overpressure (massage phase).
  • the pressure in the pulsation chamber is regularly switched between vacuum and atmospheric pressure.
  • the channel that Is connected to the room between the teat cup and the teat cup liner is during the suction phase via the pulsator connected with the vacuum line of the milk ing machine, while during the massage phase the pulsator connects the channel with the atmosphere.
  • the room 7 between the teat cup 1 and the teat cup liner 3, i.e. the pulsation chamber, is via the channel 5 and the pulsator during the massage phase put under a pressure that is higher than the atmospheric pressure.
  • This can be done in different ways, for instance by means of a separate compressor or by the outlet side of the pump generating the vacuum in the vacuum line, the outlet of the pump being connected with the channel 5.
  • An essential advantage by putting the pulsation chamber under overpressure is that the teat gets stimulation and massage along all its length, which leads to increased milk yield from the cow.
  • the strong vacuum in the room 7, i.e. the pulsation side, can be arranged in a suitable way, for instance by connecting the room with the vacuum line of the milking machine.
  • the vacuum pump is working at the level of the strong vacuum, while the room 6 inside the teat cup liner 3, i.e. the milking side, is connected via a reducing valve such that a weaker vacuum is received there.
  • the vacuum of the room 6 is essentially constant.

Abstract

Milking machine comprising teat cups and in these ones arranged teat cup liners. According to the invention the room (7) between the teat cup (1) and teat cup liner (3) is arranged to be intermittently under a pressure that is higher than the atmospheric pressure and intermittently under a vacuum that is stronger than that existing in the room (6) inside the teat cup liner (3), at the same time as this room (6) is arranged to be under a vacuum that is essentially constant.

Description

Milking machine
This invention relates to a milking machine comprising teat cups and in these ones arranged teat cup liners, the room inside the teat cup liner in each teat cup being connected with a vacuum source and the room between the teat cup and teat cup liner being connected with a pulsator that switches between suction phase and massage phase.
In a conventional milking machine it is normally only the lower part of the teat that is subjected to effective massage. The vacuum decreases very quickly on the teat counted from the point of the teat and up towards the head of the teat cup. In the head itself of the teat cup there is a weak vacuum during the main part of the milking. Due to this fact the teat does not get the necessary stimulation and massage.
By German patent publication No. 1.245.201 is previously known a milking machine working at overpressure. Due to the special design of the machine with a pump cylinder in which a plunger is moving to and fro for generating overpressure and vacuum and to the occurence of a valve in the line between the pump cylinder and the milk collecting receptacle, which valve has a closed position in one phase and an open position in another phase, the apparatus seems to give a vacuum in the room between the teat cup liner and the teat cup that could be stronger than the vacuum in the room inside the teat cup liner.
Due to this technical design the machine is impaired by a serious disadvantage, because the milk collecting receptacle and by that the channel to the inner part of the teat cup liner is discontinuously connected with the vacuum source. This leads to large vacuum fluctuations in the room inside the teat cup liner, which makes the milking of the cow more difficult. The known apparatus owing to this disadvantage has not been of any large use. This invention intends to remove the drawbacks found in the known apparatuses and improve the stimulation and the massage of the teats of the animal in order to increase the milk yield of the animal. This is brought about by the fact that the room between the teat cup and the teat cup liner is arranged to be intermittently under a pressure that is higher than the atmospheric pressure, and intermittently under a vacuum that is stronger than that existing in the room inside the teat cup liner, at the same time as this room is arranged to be under a vacuum that is essentially constant.
A preferred embodiment of the invention shall be described more closely in connection with the accompanying drawing, in which
Fig. 1 shows a teat with a teat cup put on it in section during the suction phase and
Fig. 2 shows a teat with a teat cup put on it during the massage phase.
Fig. 1 and 2 disclose a teat cup 1 fastened onto a teat 2. The teat cup comprises a teat cup liner 3 and two different channels 4, 5. One 4 of the channels is under essentially constant vacuum and is in connection with the room 6 Inside the teat cup liner 3 such that it carries milk from the teat. The second channel 5 is in connection with the room 7 between the teat cup and the teat cup liner and is furthermore connected with a pulsator that switches between vacuum (suction phase) and an overpressure (massage phase).
In conventional milking machines the pressure in the pulsation chamber is regularly switched between vacuum and atmospheric pressure. In this connection the channel that Is connected to the room between the teat cup and the teat cup liner is during the suction phase via the pulsator connected with the vacuum line of the milk ing machine, while during the massage phase the pulsator connects the channel with the atmosphere.
According to the present invention the room 7 between the teat cup 1 and the teat cup liner 3, i.e. the pulsation chamber, is via the channel 5 and the pulsator during the massage phase put under a pressure that is higher than the atmospheric pressure. This can be done in different ways, for instance by means of a separate compressor or by the outlet side of the pump generating the vacuum in the vacuum line, the outlet of the pump being connected with the channel 5.
An essential advantage by putting the pulsation chamber under overpressure is that the teat gets stimulation and massage along all its length, which leads to increased milk yield from the cow.
An effect of the application of the overpressure is that the opening of the teat cup liners may become more difficult during the suction phase. In order to counteract this effect it'is suggested according to the invention that during the suction phase a stronger vacuum than that prevailing in the room 6 inside the teat cup liner 3 is applied in the room 7 between the teat cup 1 and the teat cup liner 3. This stronger vacuum in the pulsation chamber leads to that the teat cup liner that is flattened during the massage phase (see Fig. 2) is opened in the intended way during the suction phase (see Fig. 1) and renders the milk flow from the teat possible.
The strong vacuum in the room 7, i.e. the pulsation side, can be arranged in a suitable way, for instance by connecting the room with the vacuum line of the milking machine. In this connection the vacuum pump is working at the level of the strong vacuum, while the room 6 inside the teat cup liner 3, i.e. the milking side, is connected via a reducing valve such that a weaker vacuum is received there. In this respect it is of great importance that the vacuum of the room 6 is essentially constant.
Other ways to create the strong vacuum are use of an ejector or that each of the milking side and the pulsation side is connected to a vacuum pump, which pumps are working at different levels of vacuum.

Claims

Claims
1. Milking machine comprising teat cups and in these ones arranged teat cup liners, the room inside the teat cup liner in each teat cup being connected with a vacuum source and the room between the teat cup and the teat cup liner being connected with a pulsator that switches between suction phase and massage phase, c h a r a c t e r i z e d i n that the room (7) between the teat cup (1) and teat cup liner (3) is arranged to be intertnit tently under a pressure that is higher than the atmospheric pressure and intermittently under a vacuum that is stronger than that existing in the room (6) inside the teat cup liner (3), at the same time as this room (6) is arranged to be under a vacuum that is essentially constant.
2. Machine according to claim 1, c h a r a c t e r i z e d i n that the overpressure in the room (7) between the teat cup (1) and the teat cup liner (3) is applied via a channel (5) connected with the pulsator.
3. Machine according to claim 1 or 2, c h a r a c t e r i z e d i n that the overpressure is arranged by means of a separate compressor or by the outlet side of a pump generating the vacuum in the vacuum line.
4. Machine according to anyone of the preceding claims, c h a r a c t e r i z e d i n that the vacuum in the room (7) between the teat cup (1) and the teat cup liner (3) is applied via a channel (5) connected with the pulsator.
5. Machine according to claim 4, c h a r a c t e r i z e d i n that the vacuum in the room (7) is arranged by means of a separate vacuum source.
6. Machine according to claim 4, c h a r a c t e r i z e d i n that the vacuum in the room (7) is arranged by means of an ejector.
7. Machine according to claim 4, c h a r a c t e r i z e d i n that the vacuum in the room (7) is arranged by connecting this room with the vacuum source of the apparatus, the room (6) inside the teat cup liner (3) being connected with the vacuum source via a reducing valve.
PCT/SE1983/000302 1982-08-30 1983-08-26 Milking machine WO1984000874A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU19410/83A AU1941083A (en) 1982-08-30 1983-08-26 Milking machine
DK211684A DK211684A (en) 1982-08-30 1984-04-27 mILKING MACHINE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8204926A SE8204926D0 (en) 1982-08-30 1982-08-30 MJOLKNINGSMASKIN

Publications (1)

Publication Number Publication Date
WO1984000874A1 true WO1984000874A1 (en) 1984-03-15

Family

ID=20347651

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1983/000302 WO1984000874A1 (en) 1982-08-30 1983-08-26 Milking machine

Country Status (4)

Country Link
EP (1) EP0119216A1 (en)
DK (1) DK211684A (en)
SE (1) SE8204926D0 (en)
WO (1) WO1984000874A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022197A1 (en) * 1991-06-13 1992-12-23 Dec International, Inc. Milking system with positive pressure on thin liner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1632935A1 (en) * 1968-01-26 1971-08-12 Jacob Maier Jun Milking cups for milking machines
SE370165B (en) * 1973-02-05 1974-10-07 Alfa Laval Ab

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1632935A1 (en) * 1968-01-26 1971-08-12 Jacob Maier Jun Milking cups for milking machines
SE370165B (en) * 1973-02-05 1974-10-07 Alfa Laval Ab

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022197A1 (en) * 1991-06-13 1992-12-23 Dec International, Inc. Milking system with positive pressure on thin liner
US5178095A (en) * 1991-06-13 1993-01-12 Dec International, Inc. Milking system with positive pressure on thin liner
AU654791B2 (en) * 1991-06-13 1994-11-17 Dec International, Inc. Milking system with positive pressure on thin liner

Also Published As

Publication number Publication date
DK211684D0 (en) 1984-04-27
SE8204926D0 (en) 1982-08-30
EP0119216A1 (en) 1984-09-26
DK211684A (en) 1984-04-27

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