EP0597901A1 - Element de raccordement a griffe pour trayeuse - Google Patents

Element de raccordement a griffe pour trayeuse

Info

Publication number
EP0597901A1
EP0597901A1 EP92915858A EP92915858A EP0597901A1 EP 0597901 A1 EP0597901 A1 EP 0597901A1 EP 92915858 A EP92915858 A EP 92915858A EP 92915858 A EP92915858 A EP 92915858A EP 0597901 A1 EP0597901 A1 EP 0597901A1
Authority
EP
European Patent Office
Prior art keywords
clawpiece
valves
milk
valve assembly
milking
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP92915858A
Other languages
German (de)
English (en)
Inventor
Tony Kenneth Griffin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BTG International Ltd
Original Assignee
BTG International Ltd
British Technology Group Ltd
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 BTG International Ltd, British Technology Group Ltd filed Critical BTG International Ltd
Publication of EP0597901A1 publication Critical patent/EP0597901A1/fr
Withdrawn legal-status Critical Current

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
    • A01J5/041—Milk claw

Definitions

  • the present invention relates to a milking machine clawpiece for use in automatic milking apparatus.
  • the basic components of a milking installation are (1) a cluster of four teat cups including (2) a clawpiece, (3) a suction pump and (4) a pulsator.
  • Each teat cup contains an annular pulsation chamber defined between a rigid outer casing of the cup and a flexible inner liner which fits over one of the cow's teats.
  • the pressure applied by the pulsator to the annular pulsation chamber alternates between a first pulsation value of 50 kPa below atmospheric pressure and a second pulsation value of atmospheric pressure.
  • the liner collapses on the teat and the pressure applied by it to the teat causes cessation of milk flow and provides a necessary massage of the teat.
  • a milking machine clawpiece comprises a pulsation distribution chamber which is isolated from the milk-carrying cavity of the clawpiece by the diaphragm or like-operating device of a valve assembly for the clawpiece inlet nipples whereby, in operation, when the pulsation distribution chamber is evacuated to open the liners and allow milk to flow from the teats into the short milk tubes, the pressure difference across the diaphragm or like-operating device holds the valve assembly in a first position to close the clawpiece valves when the pressure in the clawpiece cavity exceeds that in the associated inlet nipples and milk from the teats flows only as far as the closed clawpiece valves, whereas when the pulsation distribution chamber is at atmospheric pressure to close the liners and prevent milk flow from the teats, the
  • like-operating device is to be interpreted as including any means (other than a diaphragm) which is responsive to a pressure differential between the clawpiece pulsation distribution chamber and cavity, to move the valve assembly between first and second valve operating positions as above described.
  • Any means would comprise a piston, for example.
  • valve assembly is vertically displaceable between an upper first position and a lower second position.
  • the valve assembly includes an external part by means of which the valve assembly can be moved to close the clawpiece valves irrespective of the operating conditions within the clawpiece.
  • Such movement might be effected manually, for example, or by a conventional automatic cluster removal attachment.
  • the clawpiece includes an external part which can be moved to shut off the normal supply route of pulsating vacuum supply to the pulsation distribution chamber and control means are provided to control an alternative supply route for the pulsating vacuum supply so as to isolate the pulsation distribution chamber from the atmospheric pressure component of this supply.
  • the required movement of the external part may be effected manually, for example, or by a conventional automatic cluster removal attachment.
  • the clawpiece valves have at least a degree of independence from one another so that, when the valve assembly is in the first position, one or more of the valves can open in response to an appropriate pressure differential across the valve or valves while the remaining valves or valve remain closed.
  • the valve assembly is made of rubber or other resilient material and comprises an upper diaphragm portion which is linked by a stem to a depending skirt portion divided into four separate flap sections serving as the individual clawpiece valves.
  • the invention comprises a valve assembly as described in the preceding paragraph.
  • the invention comprises a milking installation including one or more clawpieces according to the first aspect of the invention.
  • Teat liners sealed in this way are referred to as Dneumatically-isolated teat liners and the new second method of milking produced, which has certain performance advantages over conventional milking, is referred to as hydraulic milking.
  • UKPA Publication No. 2244417 A (National Research Development Corporation) proposes a method of automatic milking in which, during the main milking period, the teat liners are substantially sealed from any supply of air to the milk-carrying core regions of the teat liners whereas during the closing stages of milking, air is automatically admitted to said regions to provide conventional milking.
  • This third method of milking is referred to as dual regime milking.
  • the clawpiece of the present invention has application in all three methods of milking outlined above but it is possibly at its most advantageous when used in a dual regime system.
  • Figure 1 shows a simplified and somewhat diagrammatic view of part of a typical milking installation utilising clawpieces according to the present invention
  • Figure 2 shows a somewhat diagrammatic vertical section of a clawpiece for use in the installation of Figure 1;
  • Figure 3 shows the same clawpiece as Figure 2 at a different stage of its operation
  • Figures 4a and 4b respectively show a cross-section and perspective view of a valve assembly for use in the clawpiece of Figures 2 and 3;
  • Figure 5 shows a modification of the clawpiece of Figures 2 and 3.
  • each unit 8 consists basically of four teat cups 10, a clawpiece 12, four short milk tubes 14 connecting the teat cups to the clawpiece, and a long milk tube 16 taking the milk from the clawpiece to a recorder jar 18 (or other milk measuring device).
  • Reference numeral 22 indicates the milking vacuum pipeline while reference numeral 24 indicates the air line for the pulsator 26.
  • the common milk conveyance pipeline 20 leads to a receiver vessel 28 and in operation of the installation, a milk pump 30 operates to discharge milk from the vessel 28, via pipeline 32, to a bulk tank (not shown).
  • the installation further includes the usual sanitary trap 34, vacuum regulator 35, interceptor 36 and vacuum pump 37.
  • Figure 2 shows one of the clawpieces 12 for use in the milking installation of Figure 1.
  • the clawpiece comprises a pulsation distribution chamber 40 which is isolated from the milk-carrying cavity 42 of the clawpiece by the diaphragm portion 44 of a vertically displaceable valve assembly 46 for the four clawpiece inlet nipples 48.
  • Reference numeral 49 indicates the usual pulsating vacuum supply inlet to chamber 40.
  • the assembly 46 (see also Figure 4) is made of rubber, or other resilient material, and comprises a depending skirt portion joined to the diaphragm portion by a stem 50.
  • the skirt portion is divided into four separate flap sections 52 serving as the individual clawpiece valves, each of which is able to remain closed independently of the others in the event that a continuous vacuum is present in the associated inlet nipple 48 e.g. due to the cessation of milk flow from the relevant teat.
  • the upward travel of the diaphragm portion 44 is limited by downwardly projecting stop portions 54 which surround an externally projecting pull 56.
  • An upward movement of the pull will raise the assembly 46 to close the valves, whatever the operational conditions, within the clawpiece.
  • Pull 56 may be displaced manually or by a conventional automatic cluster removal attachment at the end of miIking.
  • Figure 5 shows an alternative arrangement in which the pull (58) operates instead to shut off the normal pulsating vacuum supply route to the chamber 40 which is thereafter isolated from the atmospheric pressure component of this supply by a one-way valve 59.
  • shut-off arrangements of Figures 2 and 5 are combined so that lifting the pull both closes the clawpiece valves 52 and shuts off the normal vacuum supply route to chamber 40 which continues to be evacuated via the one-way valve 59.
  • the vacuum supply to the milking units 8 can be shut off at the end of milking by any convenient means e.g. a conventional shut off valve located in the long milk tube to the unit or between the vacuum supply tube 22 and the associated recorder jar 18 for the unit.
  • Figure 2 illustrates the valve assembly 46 as it will appear when chamber 40 is evacuated and the valves 52 close to prevent the flow of milk from the short milk tubes (via nipples 48) into the cavity 42 whenever the pressure in the clawpiece cavity exceeds that in the associated inlet nipples.
  • Figure 3 illustrates the situation where the pulsation distribution chamber is at atmospheric pressure and the assembly 46 has been displaced downwardly to open the valves 52 and allow milk to flow into cavity 42 for passage, via outlet nipple 60, into the long milk tube.
  • Pulsating the liner on the teat provides necessary massage to encourage blood circulation in the teat and avoid damage to the teat tissue. Pulsation also provides relief for the musculative tissue surrounding the teat orifice necessary to maintain the integrity of the streak canal and its function of preventing invasion by pathogenic organisms. Malfunction of pulsation to the teat is known to cause teat end damage and increased pathogenic penetration into the udder.
  • the present invention relates to a method of milking which combines the use of valves which control milk flow in the clawpiece of the milking machine cluster and air flow into the mouthpiece of the teat cup liner, and themselves are controlled by the pulsation system of the milking cluster.
  • Pulsation controlled air flow valves for the mouthpiece are the subject of a previous patent application Publication No. GB 2244417 A.
  • the present invention is a milking method which uses this type of air flow valve in combination with, a new mechanism controlled by pulsation and organises the direction of milk flow from the teat cups into the clawpiece chamber.
  • the new method of milking functions as now described.
  • vacuum is applied to the outside of the liner, it also closes the air valve at the mouthpiece of the liner and the valves between the teat cup and the clawpiece.
  • the air valve only serves to maintain the mouthpiece pressure at atmosphere each time atmosphere is applied to the pulsation chamber. It continues this function until the late stages of milking when teat barrel friction is lost with the liner, and air drives out the milk in the teat cup each time the liner is collapsed and the pulsation chamber is at atmosphere.
  • the milk valves are opening and closing (in sympathy with pulsation pressure), being closed whilst the liner is opening and being open when the liner is in the closed position. Milk only flows past them if the clawpiece pressure is lower than that in the teat cup.
  • the milk valves open while the liner collapses and expels the milk collected during the liner open phase (vacuum phase).
  • milk is encouraged to flow only in one direction away from the teat thus avoiding the problems caused by multi- directional milk flow in the conventional milking machines.
  • Machine induced infection is controlled and the milk receives less damage during transport (less lipolysis) in the machine.
  • Hydraulic milking methods function in the following manner and have several disadvantages. Basically the hydraulic milking method used only milk flow valves with no air admission. In hydraulic milking the gravity-closed valves operate independently of pulsation and respond only to the changes of pressure of the teat cup in relation to pressure in the clawpiece. At the end of milking a special arrangement is made to introduce air into each mouthpiece simultaneously to unclamp the teats from the liner.
  • the main physical disadvantages of hydraulic milking are 1) mouthpiece vacuum can be uncomfortably high and 2) the independent valves can, especially in low or air flow periods of milking, collapse the liner tightly on the teat end without relief.
  • the present invention according to said fourth aspect as above discussed, is designed to overcome these particular disadvantages so that the beneficial aspects of controlled flow can be achieved without detriment.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • External Artificial Organs (AREA)

Abstract

Elément de raccordement à griffe (12) pour trayeuse, dans lequel lorsqu'un vide est produit dans la chambre (40) de distribution de pulsations, la chemise interne s'ouvre de façon que le lait s'écoule jusqu'aux soupapes (fermées) (52) de l'élément de raccordement, alors que, lorsque la chambre de pulsations est soumise à la pression atmosphérique, la chemise se referme et la soupape de l'élément de raccordement s'ouvre pour permettre aux tubes à lait courts de décharger leur contenu dans le long tube à lait par l'intermédiaire de la cavité (42) de l'élément de raccordement.
EP92915858A 1991-07-19 1992-07-10 Element de raccordement a griffe pour trayeuse Withdrawn EP0597901A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9115610 1991-07-19
GB9115610A GB2257612A (en) 1991-07-19 1991-07-19 Milking machine clawpiece
PCT/GB1992/001311 WO1993001709A1 (fr) 1991-07-19 1992-07-17 Element de raccordement a griffe pour trayeuse

Publications (1)

Publication Number Publication Date
EP0597901A1 true EP0597901A1 (fr) 1994-05-25

Family

ID=10698624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92915858A Withdrawn EP0597901A1 (fr) 1991-07-19 1992-07-10 Element de raccordement a griffe pour trayeuse

Country Status (5)

Country Link
EP (1) EP0597901A1 (fr)
CA (1) CA2110507A1 (fr)
GB (2) GB2257612A (fr)
NZ (1) NZ243529A (fr)
WO (1) WO1993001709A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6479683B1 (en) 2001-03-06 2002-11-12 Ag Processing Inc Process for conjugating fatty acid esters

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ242686A (en) * 1992-05-11 1994-12-22 Carter Holt Harvey Plastic Pro Milking claw divided into four chambers to reduce likelihood of cross contamination of animal's quarters
RU2493696C1 (ru) * 2012-06-25 2013-09-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Рязанский государственный агротехнологический университет имени П.А. Костычева" Доильный аппарат
RU2524542C1 (ru) * 2013-02-21 2014-07-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Рязанский государственный агротехнологический университет имени П.А. Костычева" Доильный аппарат

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL79130C (fr) *
US3150637A (en) * 1963-01-29 1964-09-29 Kenneth E Fosnes Milking machine milker
CA1122151A (fr) * 1978-06-02 1982-04-20 Evan M. Phillips Methode et machine de traite
NZ204807A (en) * 1983-07-04 1988-01-08 Nortrac Engineering Ltd Teat cup claw: valve in each inlet prevents inrush of air when teat cup falls from animal
DE3429428A1 (de) * 1984-05-09 1985-11-14 Miele & Cie GmbH & Co, 4830 Gütersloh Melkvorrichtung mit einem sammelstueck
DE3587629T2 (de) * 1984-05-31 1994-02-17 British Tech Group Automatische Melkanlage.
US5161482A (en) * 1990-06-01 1992-11-10 British Technology Group Limited Automatic milking apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9301709A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6479683B1 (en) 2001-03-06 2002-11-12 Ag Processing Inc Process for conjugating fatty acid esters

Also Published As

Publication number Publication date
GB2273640B (en) 1995-04-26
NZ243529A (en) 1994-12-22
GB9324109D0 (en) 1994-03-09
GB2273640A (en) 1994-06-29
WO1993001709A1 (fr) 1993-02-04
GB9115610D0 (en) 1991-09-04
CA2110507A1 (fr) 1993-02-04
GB2257612A (en) 1993-01-20

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