USRE31659E - Sanitary backwashing system for automatic milking machines - Google Patents
Sanitary backwashing system for automatic milking machines Download PDFInfo
- Publication number
- USRE31659E USRE31659E US06/304,892 US30489281A USRE31659E US RE31659 E USRE31659 E US RE31659E US 30489281 A US30489281 A US 30489281A US RE31659 E USRE31659 E US RE31659E
- Authority
- US
- United States
- Prior art keywords
- source
- valve
- milking unit
- port
- 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.)
- Expired - Lifetime
Links
- 238000011001 backwashing Methods 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 50
- 238000011012 sanitization Methods 0.000 claims abstract description 33
- 239000008267 milk Substances 0.000 claims description 24
- 235000013336 milk Nutrition 0.000 claims description 24
- 210000004080 milk Anatomy 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000002274 desiccant Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 10
- 238000010168 coupling process Methods 0.000 claims 10
- 238000005859 coupling reaction Methods 0.000 claims 10
- 238000004891 communication Methods 0.000 claims 3
- 238000011010 flushing procedure Methods 0.000 claims 2
- 238000007664 blowing Methods 0.000 claims 1
- 230000001934 delay Effects 0.000 claims 1
- 230000000977 initiatory effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract 2
- 241000283690 Bos taurus Species 0.000 description 20
- 239000000243 solution Substances 0.000 description 13
- 235000013365 dairy product Nutrition 0.000 description 9
- 210000000481 breast Anatomy 0.000 description 8
- 239000004020 conductor Substances 0.000 description 8
- 238000011109 contamination Methods 0.000 description 7
- 201000010099 disease Diseases 0.000 description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 5
- 244000144980 herd Species 0.000 description 4
- 208000004396 mastitis Diseases 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 241000282412 Homo Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 206010068319 Oropharyngeal pain Diseases 0.000 description 1
- 201000007100 Pharyngitis Diseases 0.000 description 1
- 241000193996 Streptococcus pyogenes Species 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000006806 disease prevention Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J7/00—Accessories for milking machines or devices
- A01J7/02—Accessories for milking machines or devices for cleaning or sanitising milking machines or devices
- A01J7/022—Clean-in-Place Systems, i.e. CIP, for cleaning the complete milking installation in place
Definitions
- the present invention relates to a sanitary backwashing system for use in conjunction with automatic milking machines and more particularly to such a system which dependably and automatically sanitizes the "claw" or milking unit of the milking machine immediately prior to the milking of each dairy cow without disassembly of the milking machine or other attention.
- mastitis is a condition which has been found particularly difficult to prevent and is a constant impediment to an efficient dairy operation.
- the condition involves an inflammation of the tissues of the udder and is caused by the Streptococcus hemolyticus microorganism.
- Mastitis can be transferred from cow to cow during milking.
- One strain of the microorganism is capable of infecting a herd of cattle without causing human sickness.
- a second strain can cause human epidemics of septic sore throat by injection of infected milk.
- Another object is to provide such a system which operates to prevent the spread of disease within a dairy herd and which similarly operates to prevent contamination of the milk so as to preclude the transmission of infectious diseases to humans.
- Another object is to provide such a system which sanitizes, cleanses and dries the milking equipment immediately after the milking of each dairy cow so that the equipment is free of contamination and disease when milking of the next cow is begun.
- Another object is to provide such a system which prevents the inadvertent intermixing of sanitizing and cleaning fluids with the milk by controlling the sequence, timing and direction of fluid flow.
- Another object is to provide such a system which operates substantially automatically to perform its various functions in a manner which is fully compatible with milking operations using conventional automatic milking machines and which requires little or no supervision.
- FIG. 1 is a schematic diagram of the sanitary backwashing system of the present invention.
- FIG. 2 is a fragmentary schematic diagram showing the valve of the system disposed in a second operative position.
- the sanitary backwashing system of the present invention is generally indicated by the numeral 10 in FIG. 1.
- the system is designed to be used in conjunction with and as an operable part of a conventional automatic milking machine indicated at 11 in FIG. 1.
- the automatic milking machine can be of any suitable type which has a "claw" or milking unit 12 adapted for attachment to the udder of a dairy cow to be milked in the conventional manner.
- the milking unit is connected by a milk line or conduit 13 to a source of vacuumatic attraction 14.
- FIG. 1 the automatic milking machine 11 is shown schematically in FIG. 1 for illustrative convenience.
- Conventional milking machines utilize milking units which have a plurality of cups for attachment to the udder of the cow and which, through the conduit 13, impart an intermittent vacuumatic action to draw milk from the udder of the cow along conduit 13 for collection and subsequent processing.
- the sanitary backwashing system 10 includes a three-way control valve 20 which is mounted on the conduit 13, as shown in FIG. 1, between sections of the conduit 13 and thus between the milking unit 12 and the source 14.
- the control valve has a valve housing 21 defining an interior 22.
- the housing 21 is connected to the conduit 13 in the direction of the milking unit through a first port 23 which interconnects the conduit with the interior 22 of the housing.
- the housing is connected to the conduit 13 leading to the source 14 through a second or vacuum port 24 which interconnects the conduit 13 and the interior 22 of the housing.
- a valve core 25 is disposed within the interior of the valve housing and is movable therewithin.
- the core has a main passage 26 extending diametrically through the core.
- a right angle passage 27 extends from the main passage outwardly of the core at substantially right angles to the main passage.
- the valve core is movable within the valve housing between a first or milking position 28, shown in FIG. 1, in which the main passage interconnects the ports 23 and 24 and the passage 27 is sealed, and a second or cleansing position 29, shown in FIG. 2, in which the passage 27 is connected to the port 23 and port 24 is sealed, as will hereinafter be described.
- the backwashing system 10 has a sanitizing system 40 shown in FIG. 1.
- the sanitizing system includes a source of a drying agent or air under pressure 41, a source of water under pressure 42 and a source of a suitable sanitizing solution under pressure 43.
- the particular fluid pressures involved may be varied as best suits the equipment and the preferences of the operator. Similarly, any suitable type of sanitizing solution can be employed for the purpose.
- a sanitation line or main conduit 44 is mounted on the valve housing 21 communicating with the interior 22 thereof through a third or sanitizing port 45.
- An air conduit 46 interconnects the source of air 41 and the main conduit.
- a water conduit 47 interconnects the source of water 42 and the main conduit.
- a sanitizing solution conduit 48 interconnects the source of cleansing fluid or sanitizing solution 43 in the main conduit.
- the backwashing system 10 has a pneumatic or control system 60.
- the control system has an air control valve 61 mounted on the conduit 46 and between the source of air 41 and the main conduit 44.
- a water control valve 62 is mounted on the water conduit 47 between the source of water 42 and the main conduit.
- a sanitizing solution control valve 63 is mounted on the conduit 48 between the source 43 and the main conduit.
- the control valves 61, 62 and 63 are normally closed valves which are independently opened, upon operation of the control system as will hereinafter be described, to permit fluids to flow under pressure from their respective sources along the conduits 46, 47, or 48 into the main conduit 44.
- the control system 60 has a logic control 64 of any suitable type.
- the logic control is a pneumatically operable control valve which possesses a timing mechanism for sequencing of the control system upon operation, as will hereinafter be described.
- the control system has an electrically operable main air valve 65 which is a normally closed valve. When the main air valve is electrically energized, the valve opens to permit air under pressure to pass therethrough.
- the control system further includes an air cylinder 66 having a control arm 67 movable between a retracted position 68 shown in FIG. 1 and an extended position 69 shown in FIG. 2.
- a compression spring 70 is mounted within the cylinder and in engagement with the control arm 67 resiliently to retain the control arm in the retracted position 68.
- control arm The remote end of the control arm is fastened on the valve core 25 to maintain the valve core in the first position 28 when the arm is in the normal, retracted position 68.
- control arm moves to the extended position to position the valve core in the second position 29.
- the control system 60 includes a pneumatic circuit 75.
- the pneumatic circuit has a pneumatic conduit 76 extending from the source of air under pressure 41 to the main air valve 65 in air supplying relation.
- a pneumatic conduit 77 operably extends from the air valve 65 to the logic control 64.
- a pneumatic conduit 78 operably interconnects the logic control 64 and the air control valve 61 of conduit 46.
- a pneumatic conduit 79 operably extends from the logic control to the water control valve 62 of conduit 47.
- a pneumatic conduit 80 operably interconnects the logic control 64 and the sanitizing solution control valve 63 of conduit 48.
- a pneumatic conduit 81 operably extends from the main air valve 65 to the air cylinder 66.
- energizing of the main air valve 65 causes air under pressure to flow through conduit 76 from the source of air under pressure 41 through the main air valve 65 to logic control 64 and to the air cylinder 66.
- This causes the logic control to start the sequence of operations as will hereinafter be described.
- the supply of air under pressure to the air cylinder 66 causes the cylinder to be expanded to move the control arm 67 thereof to the extended position 69.
- the sanitary backwashing system 10 has an electrical system generally indicated at 90.
- the electrical system includes a source of twenty-four volts (24 v.) of electrical energy indicated at 91.
- a source of one hundred and ten volts (110 v.) of electrical energy is indicated at 92.
- the electrical system has a relay 93.
- the electrical system 90 has an electrical conductor 94 which extends from the source of electricity 91 to a main on-off switch 95.
- An electrical conductor 96 operably interconnects the on-off switch 95 and a milking unit switch 97 borne by the milking unit 12.
- the milking unit switch 97 is of an automatic type which is open while the milking unit is attached to the udder of a cow, but which closes upon disconnection of the milking unit from the udder.
- An electrical conductor 98 operably interconnects the milking unit switch 97 and the relay 93.
- An electrical conductor 99 operably extends from the relay 93 to the source of electrical energy 91 thus completing this portion of the circuit through the source 91.
- An electrical conductor 100 extends from the source of electrical energy 92 to a normally open switch 101.
- the relay 93 and switch 101 are juxtaposed in the conventional manner so that energizing of the relay 93 causes the switch 101 to close.
- An electrical conductor 102 extends from the normally open switch 101 to the main air valve 65 for energizing thereof.
- An electrical conductor 103 extends from the main valve 65 to the source of electrical energy 92 to complete that portion of the circuit.
- the automatic milking machine 11 is used in the conventional fashion. This involves attachment of the milking unit 12 to each cow and operation of the machine 11 in the conventional manner. If the main on-off switch 95 is in the "off" position as shown in FIG. 1, the entire system 10 is de-energized so that the control valve 20 is in the first position 28 and the switch 97 is in the open position. This permits use of the automatic milking machine without the sanitary backwashing system having any operative effect or otherwise interferring with normal operation and use of the conventional milking machine.
- switch 95 When, as is normally the case in use of the milking machine 11, the switch 95 is closed or in otherwords, positioned in the "on" position, the backwashing system 10 operates automatically to perform its various functions. Closure of switch 95 permits current to flow through the electrical system 90 to the normally open milking unit switch 97. Since this switch is a normally open switch, current does not pass through the electrical system and the backwashing system 10 thus remains inoperative.
- the switch 97 When the milking unit 12 is removed from the cow subsequent to milking the switch 97 automatically closes, as previously described, permitting electrical energy to flow through the electrical system 90 to the relay 93. Energizing of the relay 93 causes switch 101 to be closed. As a result, electrical energy flows through the system from the source of electrical energy 92, through electrical conductors 100, 102 and 103 to energize the main air valve 65.
- the main air valve 65 directs air under pessure through pneumatic conduit 77 to the logic control 64.
- the logic control causes a preset lapse of time of up to seven and one half (71/2) seconds to transpire before any functions are performed.
- This lapse of time ensures that the control valve 20 has been disposed in the second position 29 thus sealing the remainder of the milking machine 11 to the right of the control valve and the milk therewithin from the sanitizing operation to be performed.
- the lapse of time also ensures that the milking unit is separated from the cow before the sanitizing operation begins.
- the precise length of the lapse of time can, of course, be such as is most appropriate for the milking equipment in use and the preferences of the operator.
- the logic control 64 first directs air under pressure along pneumatic conduit 80 to the sanitizing solution control valve 63 causing it to open.
- the sanitizing solution is thus released under pressure from the source 43 along conduit 48 and into the main conduit 44.
- This solution passes through the ports 45 and 23 and the passages 26 and 27 of the valve core into the conduit 13.
- the sanitizing solution is discharged through all of the passages, not shown, of the milking unit to sanitize the entire unit.
- a suitable preset period of time such as five (5) seconds
- the logic control shuts off the flow of air along conduit 80 thus resulting in the closure of valve 63 and terminating the flow of sanitizing solution from the source 43.
- the logic control 54 directs air under pressure along pneumatic conduit 79 to open water control valve 62. Opening of valve 62 causes water under pressure to pass from the source 42 along water conduit 47, into main conduit 44 and through the valve core and the conduit 13 into and through the milking unit. The water is forced through the system and the milking unit to rinse all of the sanitizing solution from the system and this operation is continued a suitable period of time for this purpose. Thereafter, the logic control 64 shuts off the flow of air along conduit 79 thus closing valve 62 and terminating the flow of water through the system 10 from the source 42.
- the logic control 64 then directs air under pressure along pneumatic conduit 78 to air control valve 61 causing it to open. This permits air under pressure to flow from the source 41 along air conduit 46, into main conduit 44, through the valve core 25 along conduit 13 and through the milking unit 12. This forceful passage of air operates to dry the system 10 and the milking unit thus returning them to a dry, sanitized condition suitable for milking of the next cow.
- a suitable preset period of time such as ten (10) seconds
- the logic control 64 can be set to provide a time delay between the closing of control valve 63 and the opening of control valve 62 as well as between the closing of control valve 62 and the opening of control valve 61.
- the switch 97 When the milking unit 12 is moved into position and connected to the udder of the next successive cow for milking, the switch 97 is again moved to the open position as previously described. This causes the relay 93 to be de-energized and thus the normally open switch 101 again to move to the open position. This causes the main air valve 65 to be de-energized thus terminating the flow of air to the logic control 64 and to the air cylinder 66. Thus, the air cylinder is de-pressurized. The spring 70 within the air cylinder consequently returns the control arm 67 thereof to the retracted position 68 thus simultaneously moving the valve core 25 to the first position 28 also shown in FIG. 1. As a result, the system 10 is again ready for the next cycle of operation when milking of the cow is completed.
- the switch 97 dos not open after one sanitizing cycle until the milking unit is again in place on the udder of a cow, the core 25 of the control valve 20 does not again move to the first position 28 until such attachment has been accomplished. This operates to ensure that the conduit 13 is not open beyond the control valve to the collection point for milk at any time between milking operations. Thus, contamination of the milk by air-borne substances is precluded.
- the sanitary backwashing system of the present invention is uniquely suited to the sanitizing, washing and drying of the operative portions of automatic milking machines which come into contact or into near contact with dairy cows during the milking; operates automatically to perform its various functions without manual assistance, supervision or disassembly of the milking machine; and precludes contamination of the milk and the spread of disease, such as mastitis, within the herd and in a manner potentially hazardous to humans.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- External Artificial Organs (AREA)
Abstract
A sanitary backwashing system for an automatic milking machine having a milking unit and a source of vacuum, the system including a valve having a first port connected to the milking unit and a pair of second ports alternately connected to the first port, one of the second ports being connected to the source of vacuum; and a source of sanitizing fluid under pressure connected to the other of the second ports and the valve having a first position in which the valve connects the milking unit to the source of vacuum while blocking off the other of the second ports and a second position in which the valve connects the milking unit to the source of sanitizing fluid while blocking off the source of vacuum.
Description
1. Field of the Invention
The present invention relates to a sanitary backwashing system for use in conjunction with automatic milking machines and more particularly to such a system which dependably and automatically sanitizes the "claw" or milking unit of the milking machine immediately prior to the milking of each dairy cow without disassembly of the milking machine or other attention.
2. Description of the Prior Art
Primary concerns in the dairy industry involve the prevention of contamination of the milk products and the prevention of disease in dairy herds. Automatic milking and milk processing equipment including milking machines, cream separators, coolers, pasteurizers, homogenizers and the like are constructed of materials and designed so as to minimize the risks of contamination and disease. Frequent disassembly and manual cleaning of such equipment is common required practice in order to maintain a sanitary environment. It is also known periodically to clean dairy equipment by pumping detergents and other cleaning solutions through the equipment.
Notwithstanding this constant attention to cleanliness, mastitis is a condition which has been found particularly difficult to prevent and is a constant impediment to an efficient dairy operation. The condition involves an inflammation of the tissues of the udder and is caused by the Streptococcus hemolyticus microorganism. Mastitis can be transferred from cow to cow during milking. One strain of the microorganism is capable of infecting a herd of cattle without causing human sickness. A second strain can cause human epidemics of septic sore throat by injection of infected milk.
Therefore, it has long been known that it would be desirable to have a system for automatic milking machines which sanitizes milking units prior to milking each cow to preclude contamination and disease, including the transmission of Streptococci microorganisms from one cow to another during milking operations, without requiring the periodic disassembly, sterilization and reassembly of the milking equipment.
Therefore, it is an object of the present invention to provide a sanitary backwashing system for automatic milking machines.
Another object is to provide such a system which operates to prevent the spread of disease within a dairy herd and which similarly operates to prevent contamination of the milk so as to preclude the transmission of infectious diseases to humans.
Another object is to provide such a system which sanitizes, cleanses and dries the milking equipment immediately after the milking of each dairy cow so that the equipment is free of contamination and disease when milking of the next cow is begun.
Another object is to provide such a system which prevents the inadvertent intermixing of sanitizing and cleaning fluids with the milk by controlling the sequence, timing and direction of fluid flow.
Another object is to provide such a system which operates substantially automatically to perform its various functions in a manner which is fully compatible with milking operations using conventional automatic milking machines and which requires little or no supervision.
Further objects and advantages are to provide improved elements and arrangements thereof in an apparatus for the purposes described which is dependable, economical, durable and fully effective in accomplishing its intended purposes.
FIG. 1 is a schematic diagram of the sanitary backwashing system of the present invention.
FIG. 2 is a fragmentary schematic diagram showing the valve of the system disposed in a second operative position.
Referring more particularly to the drawing, the sanitary backwashing system of the present invention is generally indicated by the numeral 10 in FIG. 1. The system is designed to be used in conjunction with and as an operable part of a conventional automatic milking machine indicated at 11 in FIG. 1. The automatic milking machine can be of any suitable type which has a "claw" or milking unit 12 adapted for attachment to the udder of a dairy cow to be milked in the conventional manner. The milking unit is connected by a milk line or conduit 13 to a source of vacuumatic attraction 14.
It will be understood that the automatic milking machine 11 is shown schematically in FIG. 1 for illustrative convenience. Conventional milking machines utilize milking units which have a plurality of cups for attachment to the udder of the cow and which, through the conduit 13, impart an intermittent vacuumatic action to draw milk from the udder of the cow along conduit 13 for collection and subsequent processing.
The sanitary backwashing system 10 includes a three-way control valve 20 which is mounted on the conduit 13, as shown in FIG. 1, between sections of the conduit 13 and thus between the milking unit 12 and the source 14. The control valve has a valve housing 21 defining an interior 22. The housing 21 is connected to the conduit 13 in the direction of the milking unit through a first port 23 which interconnects the conduit with the interior 22 of the housing. The housing is connected to the conduit 13 leading to the source 14 through a second or vacuum port 24 which interconnects the conduit 13 and the interior 22 of the housing. A valve core 25 is disposed within the interior of the valve housing and is movable therewithin. The core has a main passage 26 extending diametrically through the core. A right angle passage 27 extends from the main passage outwardly of the core at substantially right angles to the main passage. The valve core is movable within the valve housing between a first or milking position 28, shown in FIG. 1, in which the main passage interconnects the ports 23 and 24 and the passage 27 is sealed, and a second or cleansing position 29, shown in FIG. 2, in which the passage 27 is connected to the port 23 and port 24 is sealed, as will hereinafter be described.
The backwashing system 10 has a sanitizing system 40 shown in FIG. 1. The sanitizing system includes a source of a drying agent or air under pressure 41, a source of water under pressure 42 and a source of a suitable sanitizing solution under pressure 43. The particular fluid pressures involved may be varied as best suits the equipment and the preferences of the operator. Similarly, any suitable type of sanitizing solution can be employed for the purpose. A sanitation line or main conduit 44 is mounted on the valve housing 21 communicating with the interior 22 thereof through a third or sanitizing port 45. An air conduit 46 interconnects the source of air 41 and the main conduit. A water conduit 47 interconnects the source of water 42 and the main conduit. A sanitizing solution conduit 48 interconnects the source of cleansing fluid or sanitizing solution 43 in the main conduit.
The backwashing system 10 has a pneumatic or control system 60. The control system has an air control valve 61 mounted on the conduit 46 and between the source of air 41 and the main conduit 44. A water control valve 62 is mounted on the water conduit 47 between the source of water 42 and the main conduit. A sanitizing solution control valve 63 is mounted on the conduit 48 between the source 43 and the main conduit. The control valves 61, 62 and 63 are normally closed valves which are independently opened, upon operation of the control system as will hereinafter be described, to permit fluids to flow under pressure from their respective sources along the conduits 46, 47, or 48 into the main conduit 44. The control system 60 has a logic control 64 of any suitable type. Preferably the logic control is a pneumatically operable control valve which possesses a timing mechanism for sequencing of the control system upon operation, as will hereinafter be described. The control system has an electrically operable main air valve 65 which is a normally closed valve. When the main air valve is electrically energized, the valve opens to permit air under pressure to pass therethrough. The control system further includes an air cylinder 66 having a control arm 67 movable between a retracted position 68 shown in FIG. 1 and an extended position 69 shown in FIG. 2. A compression spring 70 is mounted within the cylinder and in engagement with the control arm 67 resiliently to retain the control arm in the retracted position 68. The remote end of the control arm is fastened on the valve core 25 to maintain the valve core in the first position 28 when the arm is in the normal, retracted position 68. Upon energizing of the cylinder, the control arm moves to the extended position to position the valve core in the second position 29.
The control system 60 includes a pneumatic circuit 75. The pneumatic circuit has a pneumatic conduit 76 extending from the source of air under pressure 41 to the main air valve 65 in air supplying relation. A pneumatic conduit 77 operably extends from the air valve 65 to the logic control 64. A pneumatic conduit 78 operably interconnects the logic control 64 and the air control valve 61 of conduit 46. A pneumatic conduit 79 operably extends from the logic control to the water control valve 62 of conduit 47. A pneumatic conduit 80 operably interconnects the logic control 64 and the sanitizing solution control valve 63 of conduit 48. A pneumatic conduit 81 operably extends from the main air valve 65 to the air cylinder 66. Thus, it will be seen that energizing of the main air valve 65 causes air under pressure to flow through conduit 76 from the source of air under pressure 41 through the main air valve 65 to logic control 64 and to the air cylinder 66. This causes the logic control to start the sequence of operations as will hereinafter be described. Similarly, the supply of air under pressure to the air cylinder 66 causes the cylinder to be expanded to move the control arm 67 thereof to the extended position 69.
The sanitary backwashing system 10 has an electrical system generally indicated at 90. The electrical system includes a source of twenty-four volts (24 v.) of electrical energy indicated at 91. A source of one hundred and ten volts (110 v.) of electrical energy is indicated at 92. The electrical system has a relay 93.
The electrical system 90 has an electrical conductor 94 which extends from the source of electricity 91 to a main on-off switch 95. An electrical conductor 96 operably interconnects the on-off switch 95 and a milking unit switch 97 borne by the milking unit 12. The milking unit switch 97 is of an automatic type which is open while the milking unit is attached to the udder of a cow, but which closes upon disconnection of the milking unit from the udder. An electrical conductor 98 operably interconnects the milking unit switch 97 and the relay 93. An electrical conductor 99 operably extends from the relay 93 to the source of electrical energy 91 thus completing this portion of the circuit through the source 91. An electrical conductor 100 extends from the source of electrical energy 92 to a normally open switch 101. The relay 93 and switch 101 are juxtaposed in the conventional manner so that energizing of the relay 93 causes the switch 101 to close. An electrical conductor 102 extends from the normally open switch 101 to the main air valve 65 for energizing thereof. An electrical conductor 103 extends from the main valve 65 to the source of electrical energy 92 to complete that portion of the circuit.
The operation of the described embodiment of the subject invention is believed to be clearly apparent and is briefly summarized at this point. The automatic milking machine 11 is used in the conventional fashion. This involves attachment of the milking unit 12 to each cow and operation of the machine 11 in the conventional manner. If the main on-off switch 95 is in the "off" position as shown in FIG. 1, the entire system 10 is de-energized so that the control valve 20 is in the first position 28 and the switch 97 is in the open position. This permits use of the automatic milking machine without the sanitary backwashing system having any operative effect or otherwise interferring with normal operation and use of the conventional milking machine.
When, as is normally the case in use of the milking machine 11, the switch 95 is closed or in otherwords, positioned in the "on" position, the backwashing system 10 operates automatically to perform its various functions. Closure of switch 95 permits current to flow through the electrical system 90 to the normally open milking unit switch 97. Since this switch is a normally open switch, current does not pass through the electrical system and the backwashing system 10 thus remains inoperative.
When the milking unit 12 is removed from the cow subsequent to milking the switch 97 automatically closes, as previously described, permitting electrical energy to flow through the electrical system 90 to the relay 93. Energizing of the relay 93 causes switch 101 to be closed. As a result, electrical energy flows through the system from the source of electrical energy 92, through electrical conductors 100, 102 and 103 to energize the main air valve 65.
When the main air valve 65 is energized, air under pressure flows from the source 41 through pneumatic conduit 76, main air valve 65, pneumatic conduit 81 to pressurize the air cylinder 66. Pressurization of the air cylinder causes the cylinder to expand and move the control arm 67 thereof to the extended position 69 shown in FIG. 2. This causes the valve core 25 of the control valve 20 to be moved to the second position 29 shown in FIG. 2. As a result sanitizing port 45 is connected to first port 23 and vacuum port 24 is sealed by the valve core. It will be seen that as long as the main air valve 65 remains energized by closure of the normally open switch 101 the air cylinder and valve core remain in these respective positions.
Simultaneously, the main air valve 65 directs air under pessure through pneumatic conduit 77 to the logic control 64. This begins the sequence of timed operations which results in the backwashing system 10 performing its various sanitizing functions with respect to the milking unit 12. However, upon the initial supply of air thereto, the logic control causes a preset lapse of time of up to seven and one half (71/2) seconds to transpire before any functions are performed. This lapse of time ensures that the control valve 20 has been disposed in the second position 29 thus sealing the remainder of the milking machine 11 to the right of the control valve and the milk therewithin from the sanitizing operation to be performed. The lapse of time also ensures that the milking unit is separated from the cow before the sanitizing operation begins. The precise length of the lapse of time can, of course, be such as is most appropriate for the milking equipment in use and the preferences of the operator.
When this lapse of time has transpired, the logic control 64 first directs air under pressure along pneumatic conduit 80 to the sanitizing solution control valve 63 causing it to open. The sanitizing solution is thus released under pressure from the source 43 along conduit 48 and into the main conduit 44. This solution passes through the ports 45 and 23 and the passages 26 and 27 of the valve core into the conduit 13. The sanitizing solution is discharged through all of the passages, not shown, of the milking unit to sanitize the entire unit. After a suitable preset period of time, such as five (5) seconds, the logic control shuts off the flow of air along conduit 80 thus resulting in the closure of valve 63 and terminating the flow of sanitizing solution from the source 43.
Subsequently the logic control 54 directs air under pressure along pneumatic conduit 79 to open water control valve 62. Opening of valve 62 causes water under pressure to pass from the source 42 along water conduit 47, into main conduit 44 and through the valve core and the conduit 13 into and through the milking unit. The water is forced through the system and the milking unit to rinse all of the sanitizing solution from the system and this operation is continued a suitable period of time for this purpose. Thereafter, the logic control 64 shuts off the flow of air along conduit 79 thus closing valve 62 and terminating the flow of water through the system 10 from the source 42.
The logic control 64 then directs air under pressure along pneumatic conduit 78 to air control valve 61 causing it to open. This permits air under pressure to flow from the source 41 along air conduit 46, into main conduit 44, through the valve core 25 along conduit 13 and through the milking unit 12. This forceful passage of air operates to dry the system 10 and the milking unit thus returning them to a dry, sanitized condition suitable for milking of the next cow. When a suitable preset period of time, such as ten (10) seconds, has elapsed, the logic control 64 terminates the flow of air along pneumatic conduit 78 thus allowing the air control valve 61 to close and terminating the flow of air through the system. This completes the sequence of operations performed by the logic control during one cycle. It will be understood that the time periods heretofore set forth are not critical to the successful operation of the system of the present invention and can be varied to suit the needs of the operator. Similarly, if desired, the logic control 64 can be set to provide a time delay between the closing of control valve 63 and the opening of control valve 62 as well as between the closing of control valve 62 and the opening of control valve 61.
When the milking unit 12 is moved into position and connected to the udder of the next successive cow for milking, the switch 97 is again moved to the open position as previously described. This causes the relay 93 to be de-energized and thus the normally open switch 101 again to move to the open position. This causes the main air valve 65 to be de-energized thus terminating the flow of air to the logic control 64 and to the air cylinder 66. Thus, the air cylinder is de-pressurized. The spring 70 within the air cylinder consequently returns the control arm 67 thereof to the retracted position 68 thus simultaneously moving the valve core 25 to the first position 28 also shown in FIG. 1. As a result, the system 10 is again ready for the next cycle of operation when milking of the cow is completed. Since the switch 97 dos not open after one sanitizing cycle until the milking unit is again in place on the udder of a cow, the core 25 of the control valve 20 does not again move to the first position 28 until such attachment has been accomplished. This operates to ensure that the conduit 13 is not open beyond the control valve to the collection point for milk at any time between milking operations. Thus, contamination of the milk by air-borne substances is precluded.
Therefore, the sanitary backwashing system of the present invention is uniquely suited to the sanitizing, washing and drying of the operative portions of automatic milking machines which come into contact or into near contact with dairy cows during the milking; operates automatically to perform its various functions without manual assistance, supervision or disassembly of the milking machine; and precludes contamination of the milk and the spread of disease, such as mastitis, within the herd and in a manner potentially hazardous to humans.
Although the invention has been herein shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is not limited to the illustrative details disclosed.
Claims (7)
1. A sanitary backwashing system for an automatic milking machine having a milking unit, a source of vacuum and a milk line interconnecting the milking unit and the soruce of vacuum, comprising:
A. a source of sanitisizing fluid;
B. a fluid control valve connected to the source of sanitizing fluid;
C. a source of air under pressure;
D. an air control valve connected to the source of air under pressure;
E. a sanitation line interconnecting the fluid control valve and the air control valve in parallel;
F. a three-way valve in the milk line connected to the sanitation line having a first position shutting off the sanitation line while connecting the milking unit to the source of vacuum, and a second position connecting the sanitation line to the milking unit while isolating the milking unit from the source of vacuum; and
G. means for successively placing the three-way valve in the first position, while closing the fluid control valve and the air control valve, positioning the three-way valve in its second position while opening the fluid control valve to flush sanitizing fluid through the milking unit with the air control valve closed, with the three-way valve in its second position closing the fluid control valve and opening the air control valve to blow sanitizing fluid from the milking unit.
2. The backwashing system of claim 1 including:
H. a source of water; and
I. a water control valve connected to the source of water and to said sanitation line and operable by said placing means to open with the three-way valve in its second position and the fluid and air control valves closed to flush water through the milking unit subsequent to flushing with the sanitizing solution and prior to blowing air therethrough.
3. The backwashing system of claim 1 wherein said placing means includes a logic control operably connected to the fluid and air control valves for discriminately opening and closing said valves in timed sequence .Iadd.subsequent .Iaddend.to said positioning of the three-way valve in the second position.
4. The backwashing system of claim 1 including:
H. an electrical system having a switch borne by the milking unit which closes only when the milking unit is disconnected from a cow, a source of electrical energy and an electrical circuit interconnecting said source of electrical energy, the switch and the placing means to power the placing means from the source of electrical energy upon disconnection of the milking unit from a cow. .[.5. A sanitary backwashing system for an automatic milking machine having a milking unit, a source of vacuum and a milk line interconnecting the milking unit and the source of vacuum, comprising:
A. a valve having a first port connected to the milking unit through the milk line, a second port connected to the source of vacuum through the milk line and a third port and a valve member movable between a milking position interconnecting the first and second ports and sealing the third port and a cleansing position interconnecting the first and third ports and sealing the second port;
B. means connected to the third port for supplying a cleansing fluid to the third port; and
C. control means operably interconnecting the milking unit and the valve member for maintaining the valve member in the milking position when the milking unit is attached to an animal to be milked and for moving said valve member to the cleansing position upon detachment of the milking unit from an animal thereby sealing the milk line between the valve and the source of vacuum from communication with the milking unit when the milking unit is detached from an animal..]. .[.6. The backwashing system of claim 5 wherein the control means delays movement of the valve member to the milking position upon initiation of attachment to an animal to be milked to insure said sealing of the milk line between the valve and the source of vacuum during the attachment process..]. .[.7. The backwashing system of claim 5 including means connected to the third port for supplying a drying agent to said third port and wherein the control means is operably connected to the cleansing fluid supplying means and to the drying agent supplying means and is operable upon movement of the valve member to the cleansing position to direct cleansing fluid and drying agent in sequence from their respective supplying means through the valve, along the milk
line to the milking unit..]. 8. The backwashing system of claim .[.7.]. .Iadd.15 .Iaddend.wherein the cleaning fluid is a sanitizing solution, the drying agent is air under pressure and the backwashing system includes means connected to the third port for supplying water to the third port and said control means is operably connected to said water supplying means to direct water from the water supplying means to the third port in sequence between said direction of the cleansing fluid and direction of the drying agent. .Iadd. 9. A sanitary backwashing system for an automatic milking machine having a milking unit and a source of vacuum, comprising in combination:
a. a source of sanitizing fluid;
b. a fluid control valve connected to the source of sanitizing fluid;
c. a source of air under pressure;
d. an air control valve connected to the source of air under pressure;
e. a sanitation line interconnecting the fluid control valve and the air control valve in parallel;
f. valve means having a first port coupled to the milking unit, having a second port coupled to the source of vacuum, and having a third port coupled to said sanitation line, said valve means being adapted to assume a first state for coupling said first and second ports to one another to connect the milking unit to the source of vacuum while isolating said third port from said first and second ports, said valve means also being adapted to assume a second state for coupling said first and third ports to one another to connect said sanitation line to the milking unit while isolating said second port from said first and third ports; and
g. control means for successively causing said valve means to assume its first state while closing said fluid control valve and said air control valve, causing said valve means to assume its second state while opening said fluid control valve to flush sanitizing fluid through the milking unit with said air control valve closed, and subsequently closing said fluid control valve and opening said air control valve to blow sanitizing fluid from the milking unit while maintaining said valve means in its
second state. .Iaddend..Iadd. 10. A sanitary backwashing system for an automatic milking machine having a milking unit and a source of vacuum, comprising in combination:
a. a source of cleansing fluid;
b. a source of air under pressure;
c. valve means having a first port coupled to the milking unit, having a second port coupled to the source of vacuum, having a third port coupled to said source of cleansing fluid, and having a fourth port coupled to said source of air under pressure, said valve means being adapted to assume a first state for coupling said first and second ports to one another to connect the milking unit to the source of vacuum while isolating said third and fourth ports from said first and second ports, said valve means being adapted to assume a second state for coupling said first and third ports to one another to connect said source of cleansing fluid to the milking unit while isolating said second and fourth ports from said first and third ports, and said valve means being adapted to assume a third state for coupling said first and fourth ports to one another to connect said source of air under pressure to the milking unit while isolating said second and third ports from said first and fourth ports; and
d. control means for successively causing said valve means to assume its first state for milking an animal, causing said valve means to assume its second state for flushing cleansing fluid through the milking unit, and subsequently causing said valve means to assume its third state to blow cleansing fluid from the milking unit. .Iaddend..Iadd. 11. A sanitary backwashing system as recited by claims 9 or 10 wherein said valve means is pneumatically actuated and wherein said control means selectively supplies pneumatic pressure to said valve means for determining the state assumed thereby. .Iaddend..Iadd. 12. A sanitary backwashing system for an automatic milking machine having a milking unit and a source of vacuum, comprising in combination:
a. a source of cleansing fluid;
b. a fluid control valve connected to the source of cleansing fluid;
c. a source of air under pressure;
d. a sanitation line coupling the fluid control valve and the source of air under pressure in parallel;
e. valve means having a first port coupled to the milking unit, having a second port coupled to the source of vacuum, and having a third port coupled to said sanitation line, said valve means being adapted to assume a first state for coupling said first and second ports to one another to connect the milking unit to the source of vacuum while isolating said third port from said first and second ports, said valve means also being adapted to assume a second state for coupling said first and third ports to one another to connect said sanitation line to the milking unit while isolating said second port from said first and third ports; and
f. control means for successively causing said valve means to assume its first state while closing said fluid control valve, causing said valve means to assume its second state while opening said fluid control valve to flush cleansing fluid through the milking unit, and subsequently closing said fluid control valve for allowing said source of air under pressure to blow cleansing fluid from the milking unit while maintaining said valve
means in its second state. .Iaddend. .Iadd. 13. A sanitary backwashing system for an automatic milking machine having a milking unit and a source of vacuum, comprising in combination:
a. valve means having a first port coupled to the milking unit, having a second port coupled to the source of vacuum, and having a third port, said valve means being adapted to assume a first state for coupling said first and second ports to one another to connect the milking unit to the source of vacuum while isolating said third port from said first and second ports, said valve means also being adapted to assume a second state for coupling said first and third ports to one another while isolating said second port from said first and third ports;
b. means connected to the third port for supplying a cleansing fluid to the third port;
c. switch means for automatically indicating whether the milking unit is attached to an animal to be milked; and
d. control means responsive to said switch means for maintaining said valve means in said first state when the milking unit is attached to an animal to be milked, said control means causing said valve means to assume its second state upon detachment of the milking unit from an animal thereby sealing the source of vacuum from communication with the milking unit when the milking unit is detached from an animal. .Iaddend. .Iadd. 14. A sanitary backwashing system for an automatic milking machine having a milking unit, a source of vacuum and a milk line interconnecting the milking unit and the source of vacuum, comprising:
A. a valve having a first port connected to the milking unit through the milk line, a second port connected to the source of vacuum through the milk line and a third port and a valve member movable between a milking position interconnecting the first and second ports and sealing the third port and a cleansing position interconnecting the first and third ports and sealing the second port;
B. means connected to the third port for supplying a cleansing fluid to the third port;
C. means connected to the third port for supplying a drying agent to said third port; and
D. control means operably interconnecting the milking unit and the valve member for maintaining the valve member in the milking position when the milking unit is attached to an animal to be milked and for moving said valve member to the cleansing position upon detachment of the milking unit from an animal thereby sealing the milk line between the valve and the source of vacuum from communication with the milking unit when the milking unit is detached from an animal, said control means being operably connected to the cleansing fluid supplying means and to the drying agent supplying means and operable upon movement of the valve member to the cleansing position to direct cleansing fluid and drying agent in sequence from their respective supplying means through the valve, along the milk line to the milking unit. .Iaddend.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/304,892 USRE31659E (en) | 1978-04-20 | 1981-09-23 | Sanitary backwashing system for automatic milking machines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/898,432 US4168677A (en) | 1978-04-20 | 1978-04-20 | Sanitary backwashing system for automatic milking machines |
US06/304,892 USRE31659E (en) | 1978-04-20 | 1981-09-23 | Sanitary backwashing system for automatic milking machines |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/898,432 Reissue US4168677A (en) | 1978-04-20 | 1978-04-20 | Sanitary backwashing system for automatic milking machines |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE31659E true USRE31659E (en) | 1984-09-04 |
Family
ID=26974293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/304,892 Expired - Lifetime USRE31659E (en) | 1978-04-20 | 1981-09-23 | Sanitary backwashing system for automatic milking machines |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE31659E (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040194712A1 (en) * | 2002-12-19 | 2004-10-07 | Lattec I/S | Milk conveyer device |
US20100175623A1 (en) * | 2008-07-28 | 2010-07-15 | Lely Patent N.V. | Closing device for milking device |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US655200A (en) * | 1900-04-03 | 1900-08-07 | Mark Mason Condron | Cow-milking machine. |
US2056568A (en) * | 1934-06-11 | 1936-10-06 | Fred F Davis | Dispensing system |
US2183007A (en) * | 1938-08-04 | 1939-12-12 | Buchhorn Fred | Device adapted for cleansing pipes |
US2443550A (en) * | 1944-12-08 | 1948-06-15 | Michael J Zwosta | Beer control and pipe-cleaning apparatus |
US2620106A (en) * | 1950-08-02 | 1952-12-02 | Benjamin E Weeks | Device for controlling, operating, and cleaning various fluid operated systems |
US2733667A (en) * | 1956-02-07 | Breather pump for cleansing and sterilizing milking lines | ||
US3310061A (en) * | 1965-03-26 | 1967-03-21 | Lloyd F Bender | Milk line equipment |
US3461845A (en) * | 1967-01-23 | 1969-08-19 | Research Corp | Sanitizing apparatus for milking machines |
US3500839A (en) * | 1968-05-07 | 1970-03-17 | Lloyd F Bender | Automated washing system for cleaning,sanitizing and drying flexible tubing or the like |
US3958584A (en) * | 1975-04-10 | 1976-05-25 | Leon Jones | System for flushing of a milking machine |
US4034713A (en) * | 1975-11-04 | 1977-07-12 | Umbaugh Raymond E | Milking system and method |
US4175514A (en) * | 1977-05-19 | 1979-11-27 | Frank F. Souza, Inc. | Automatic milking machine control and cleansing |
-
1981
- 1981-09-23 US US06/304,892 patent/USRE31659E/en not_active Expired - Lifetime
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2733667A (en) * | 1956-02-07 | Breather pump for cleansing and sterilizing milking lines | ||
US655200A (en) * | 1900-04-03 | 1900-08-07 | Mark Mason Condron | Cow-milking machine. |
US2056568A (en) * | 1934-06-11 | 1936-10-06 | Fred F Davis | Dispensing system |
US2183007A (en) * | 1938-08-04 | 1939-12-12 | Buchhorn Fred | Device adapted for cleansing pipes |
US2443550A (en) * | 1944-12-08 | 1948-06-15 | Michael J Zwosta | Beer control and pipe-cleaning apparatus |
US2620106A (en) * | 1950-08-02 | 1952-12-02 | Benjamin E Weeks | Device for controlling, operating, and cleaning various fluid operated systems |
US3310061A (en) * | 1965-03-26 | 1967-03-21 | Lloyd F Bender | Milk line equipment |
US3461845A (en) * | 1967-01-23 | 1969-08-19 | Research Corp | Sanitizing apparatus for milking machines |
US3500839A (en) * | 1968-05-07 | 1970-03-17 | Lloyd F Bender | Automated washing system for cleaning,sanitizing and drying flexible tubing or the like |
US3958584A (en) * | 1975-04-10 | 1976-05-25 | Leon Jones | System for flushing of a milking machine |
US4034713A (en) * | 1975-11-04 | 1977-07-12 | Umbaugh Raymond E | Milking system and method |
US4175514A (en) * | 1977-05-19 | 1979-11-27 | Frank F. Souza, Inc. | Automatic milking machine control and cleansing |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040194712A1 (en) * | 2002-12-19 | 2004-10-07 | Lattec I/S | Milk conveyer device |
US20060107899A1 (en) * | 2002-12-19 | 2006-05-25 | Lattec I/S | Milk conveyer device |
US7162971B2 (en) * | 2002-12-19 | 2007-01-16 | Lattec I/S | Milk conveyer device |
US7270079B2 (en) | 2002-12-19 | 2007-09-18 | Lattec I/S | Milk conveyer device |
US20080276870A1 (en) * | 2002-12-19 | 2008-11-13 | Lattec I/S | Milk conveyer device |
US7690328B2 (en) | 2002-12-19 | 2010-04-06 | Lattec I/S | Milk conveyer device |
US20100175623A1 (en) * | 2008-07-28 | 2010-07-15 | Lely Patent N.V. | Closing device for milking device |
US8256378B2 (en) * | 2008-07-28 | 2012-09-04 | Lely Patent N.V. | Closing device for milking device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4168677A (en) | Sanitary backwashing system for automatic milking machines | |
US10681895B2 (en) | Dairy animal milking preparation system and methods | |
RU2676917C2 (en) | Apparatus for milking and milk collection with milk line protection | |
US4149489A (en) | Valving system for milking | |
EP0543463B1 (en) | Device for pneumatic milking, and teat cup for such a device | |
AU724618B2 (en) | An implement for automatically milking animals | |
JP2529875B2 (en) | Nipple cleaning method, cleaning device and cup for cleaning device | |
EP1035767B1 (en) | Combined cleaning and pre-milking device | |
EP1737291B1 (en) | Milking equipment | |
US4034713A (en) | Milking system and method | |
AU731973B2 (en) | A cleaning implement for cleaning with a rinsing liquid at least part of a milking machine | |
US4403569A (en) | Milking machine | |
US3385265A (en) | Sanitizing milking system | |
USRE31659E (en) | Sanitary backwashing system for automatic milking machines | |
US2808025A (en) | Milking and collecting apparatus | |
CA1204902A (en) | Apparatus for cleaning liquid conveying system and control valve assembly therefor | |
JP2002524094A (en) | Automatic milking equipment for animals such as dairy cows | |
US2714893A (en) | Direct washing, flushing, and sterilizing system of stainless steel milk machine pipe lines on farms | |
KR20090108950A (en) | Apparatus for reversing edible intestine | |
US11659810B2 (en) | Automatic washing system for bucket milking machine | |
EP0055628A1 (en) | A milking machine | |
JPS6352832A (en) | Apparatus and method for washing milking unit | |
JPS639312Y2 (en) | ||
JP2658015B2 (en) | Sanitary washing equipment | |
AU2022424306A1 (en) | Milking device with a cleaning unit |