NZ625412B2 - A cartridge, and a teatcup - Google Patents

Abstract

The invention refers to a teatcup and a cartridge to be comprised by the teatcup to be attached to a teat of an animal to be milked. The cartridge (1 ) comprises a sleeve (6) having an upper end (6a) and a lower end (6b), and a teatcup liner (7) mounted in the sleeve and having an inner space (8) for receiving said teat. A pulsation chamber (9) provided between an inner side of the sleeve and an outer side of the teatcup liner. The teatcup liner comprises an upper end portion (7a) located at the upper end of the sleeve, a barrel portion (7c) and a lower end portion (7b) extending beyond the lower end of the sleeve. The lower end portion forms an end nozzle (10) beyond the lower end of the sleeve. The end nozzle has a tapering external shape configured to be received in a milk conduit (4) for transporting the milk from the cartridge to the milk conduit. r receiving said teat. A pulsation chamber (9) provided between an inner side of the sleeve and an outer side of the teatcup liner. The teatcup liner comprises an upper end portion (7a) located at the upper end of the sleeve, a barrel portion (7c) and a lower end portion (7b) extending beyond the lower end of the sleeve. The lower end portion forms an end nozzle (10) beyond the lower end of the sleeve. The end nozzle has a tapering external shape configured to be received in a milk conduit (4) for transporting the milk from the cartridge to the milk conduit.

Description

A cartridge, and a teatcup TECHNICAL FIELD OF THE INVENTION The present invention refers lly to teatcups to be attached to the teats of an animal to be milked. More specifically, the present invention refers to a cartridge configured to form part of a teatcup.

Furthermore, the present invention refers to a teatcup sing a caflndge.

BACKGROUND OF THE INVENTION AND PRIOR ART Teatcups used today typically consist of two separate main parts, a shell and a teatcup liner d in the shell. The teatcup liner is an article of consumption that is subjected to wear, and thus has to be replaced on a regular basis. The replacement of the teatcup liner is a time-consuming and difficult work, requiring dismounting of the teatcup liner from the shell and mounting of a new teatcup liner in the shell. The p liner may form one single part either er with the short milk conduit or separate from the short milk conduit.

US—4,459,939 discloses a teatcup comprising a discardable cartridge and an outer shell. The cartridge comprises a sleeve, or inner shell, having an upper end and a lower end, a teatcup liner mounted in the sleeve. The cartridge thus forms a two—piece teatcup liner having an inner space for receiving said teat, and a pulsation chamber ed between an inner side of the sleeve and an outer side of the teatcup liner. The teatcup liner has an upper end n located at the upper end of the sleeve, a barrel portion and a lower end portion at the lower end of the . The teatcup liner is made of a material having a relatively high elasticity. The teatcup liner is releasably connected to a cylindrical nipple extending away from the lower end portion beyond the lower end of the sleeve.

EP-511 723 discloses a teatcup comprising a cartridge. The cartridge comprises a sleeve having an upper end and a lower end, a p liner mounted in the sleeve and having an inner space for receiving said teat, and a pulsation chamber provided between an inner side of the sleeve and an outer side of the teatcup liner. The teatcup liner has an upper end portion located at the upper end of the sleeve, a barrel portion and a lower end portion extending beyond the lower 1O end of the sleeve. The barrel n and the lower end n are both made of a material having a relatively high elasticity.

SUMMARY OF THE INVENTION The object of the present invention is to provide a teatcup, in which components subjected to significant wear may be easily and securely replaced. In particular, an object of the invention is to facilitate dismounting and replacement of the teatcup liner and thus to minimise the time needed for the replacement t negatively influencing the hygienic properties of the teatcup.

This object is achieved by a cartridge configured to form part of a teatcup to be attached to a teat of an animal to be milked, the cartridge comprising a sleeve having an upper end and a lower end, a teatcup liner mounted in the sleeve and having an inner space for receiving said teat, a pulsation chamber provided between an inner side of the sleeve and an outer side of the teatcup liner, wherein the teatcup liner comprises an upper end portion located at the upper end of the sleeve, a barrel portion and a lower end portion extending beyond the lower end of the sleeve, wherein the lower end n forms an end nozzle beyond the lower end of the sleeve, wherein the end nozzle has a ng external shape configured to be received in a milk conduit for transporting the milk from the cartridge to the milk conduit, wherein the barrel portion is the main part of the teatcup liner, wherein the barrel n is made of a first material having a relatively high elasticity, and the lower end portion is made of a second material having a relatively low elasticity in comparison with the relatively high elasticity of the first material of the barrel portion, and wherein the lower end portion comprises a lower engagement member which s the sleeve in such a manner that the barrel portion of the teatcup liner is maintained in a stretched state in the sleeve.

Such a cartridge may be easily replaced and mounted to a milk 1O conduit by introducing the tapering end nozzle into the milk conduit.

Such an end nozzle may be properly received in the milk conduit.

Solely by pressing the tapering end nozzle into the end opening of the milk conduit a secure and tight connection will be achieved.

Consequently, the milk will flow in a reliable manner from the teatcup liner into the milk conduit during milking.

According to an embodiment of the invention, the end nozzle has a tapering internal shape. Thanks to such an internal shape, a smooth and even milk flow from the teatcup liner into the milk conduit during milking may be ensured.

Advantageously, the first material is ent from the second material, or in other words may have a different composition than the second material. By making the lower end n and thus the end nozzle in a less elastic material, Le. a more rigid material, than the barrel portion, the end nozzle may be y and ly received in the milk conduit.

Alternatively, the barrel portion, the lower end portion and the upper end portion are made of the same al, for instance in one single piece, preferably through ion moulding.

According to a further ment of the invention, the barrel portion is ed to the lower end n by a permanent joint.

Advantageously, the permanent joint may be formed by melting of at least one of the first al and the second material at the permanent joint. Such a melting, or g, s a reliable and permanent joint between the barrel portion and the lower end portion. 1O According to a further embodiment of the invention, the lower end portion comprises a lower engagement member which engages the sleeve in such a manner that the barrel n of the teatcup liner is maintained in a stretched state in the sleeve. In the stretched state, the teatcup liner is prolonged in comparison with a rest state in which it is not mounted in the shell and thus not subjected to any external forces.

According to a further embodiment of the invention, the lower engagement member comprises, or is formed by, a lower annular flange extending outwardly and abutting an end surface of the lower end of the sleeve. Preferably, the lower annular flange has a diameter that is greater the inner diameter of the lower end of the sleeve.

According to a further embodiment of the invention, the upper end portion comprises an upper engagement member which enables engagement of the upper end of the sleeve. Advantageously, the upper engagement member comprises an upper annular flange extending outwardly beyond an inner diameter of an end surface of the upper end of the sleeve. Preferably, the upper annular flange has a diameter that is greater the inner diameter of the upper end of the sleeve. Moreover, the diameter of the upper annular flange may be greater than the diameter of the lower annular flange.

According to a further embodiment of the invention, the upper end portion is made of a third material having a relatively low elasticity in comparison with the relatively high elasticity of the first material 1O of the barrel n. Advantageously, the second material and the third material may be the same material and have thus the same composition.

According to a further ment of the invention, the sleeve comprises a sealing ring extending around an outer surface of the sleeve, and a hole through the sleeve, which hole is configured to permit a pulsating vacuum to be applied in the pulsation chamber and which hole is provided between the sealing ring and the lower end of the sleeve.

According to a r embodiment of the invention, the cartridge comprises a lip member provided at the upper end portion of the teatcup liner and forming a lip defining an opening for the teat.

Advantageously, the lip member may be detachably attached to the p liner, or possibly to the sleeve, by a snap tion. Such a snap connection permits easy nting and replacement of the lip member.

The object is also achieved by the teatcup initially defined, further comprising said milk conduit, wherein the milk conduit ses a first end portion, a conduit portion and a second end portion, and a milk l extending through the first end portion, the t portion and the second end portion, and wherein the end nozzle is introduced and held in the milk channel of the first end portion.

According to a r embodiment of the invention, the milk channel of the upper end portion has an internal ng shape from the first end towards the milk channel of the conduit portion.

According to a further embodiment of the invention, the teatcup ses a connector connecting the cartridge to the milk conduit.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be explained more closely by means of a description of various embodiments and with nce to the drawings attached hereto.

Fig 1 discloses a longitudinal section of a teatcup comprising 1O or connected to a milk conduit.

Fig 2 discloses an exploded longitudinal section of a cartridge of the teatcup in Fig 1.

Fig 3 discloses a section of the milk conduit in Fig 1.

Fig 4 discloses a section of a connector of the teatcup in Fig 1.

Fig 5 discloses a section of a pulse conduit of the teatcup in Fig 1.

ED DESCRIPTION OF VARIOUS MENTS OF THE INVENTION Fig 1 discloses a p to be attached to a teat of an animal to be milked. The teatcup comprises a cartridge 1 and a connector 2. The teatcup may also comprise a lip member 3. In addition, the teatcup milk conduit 4, such as a short may comprise or be connected to a milk conduit. Moreover, the teatcup may comprise or be connected to a pulse conduit 5.

A longitudinal centre axis x extends through and along the teatcup, 3O i.e. the cartridge 1, the connector 2 and the lip member 3. The longitudinal centre axis x also extends through and along the milk t 4 when it is in a rest state as disclosed in Fig. 1.

The cartridge 1, see also Fig 2, comprises a sleeve 6 having an liner 7 mounted in upper end 6a and a lower end 6b, and a p the sleeve 6. In Figs 1 and 2, the cartridge is shown in a d state, i.e. the teatcup liner 7 is d in the sleeve 6. The teatcup liner 7 has or forms an inner space 8 for receiving the teat.

WO 95288 A pulsation chamber 9 is provided or formed between an inner side of the sleeve 6 and an outer side of the teatcup liner 7.

The teatcup liner 7 comprises an upper end portion 7a located at the upper end 6a of the sleeve 6, a barrel portion 7c and a lower end portion 7b located at the lower end of the sleeve 6. The barrel portion 70 is an intermediate tubular portion provided between and adjoining the upper end portion 7a and the lower end portion 7b.

The barrel portion 70 is the main part of the teatcup liner 7 and is in contact with the teat of the animal during milking.

The lower end portion 7b extends from a position within the sleeve 6 away from and beyond the lower end 6b of the sleeve 6. The lower end portion 7b forms an end nozzle 10. The end nozzle 10 is the part of the lower end portion 7b that extends beyond the lower end 6b of the sleeve 6. The end nozzle 10 forms an outlet from the inner space 8.

The end nozzle 10 has a tapering al shape configured to be received in the milk conduit 4 for transporting the milk from the inner space 8 to the milk conduit 4. The end nozzle 10 also has a tapering internal shape forming a tapering outlet for the milk from the inner space 8 of the teatcup liner 7.

The barrel portion 7c of the teatcup liner 7 is made of a first material having a relatively high elasticity. The lower end portion 7b of the teatcup liner 7 is made of a second material, which is ent from the first material and has a ent composition. The second material has a relatively low city in comparison with the relatively high elasticity of the first material of the barrel portion The first material may consist of or comprise rubber, black rubber, silicone rubber, elastic polymers, such as Thermoplastic Elastomers, TPE, or any other suitable c material.

The second material may consist of or comprise a le polymer with low elasticity, such as polyeten, polypropene, etc.

The upper end portion 7a is made in a third material having a relatively low elasticity in comparison with the relatively high elasticity of the first material of the barrel portion 7c. The third al may be a material having similar or the same composition and/or properties as the second al of the lower end portion The barrel portion 7c is attached to the lower end portion 7b by a lower permanent joint 11. Such a permanentjoint 11 may be formed 1O by a melt joint, a weld joint or a al bonding between the first material and the second material.

The barrel portion 7c is also attached to the upper end portion 7a by an upper permanent joint 12. Such a permanent joint 12 may be formed by a melt joint, a weld joint or a chemical bonding between the first material and the third material.

The lower and/or upper permanent joints 11, 12 my be formed by melting of at least one of the first material and the second material at the permanent joint. The lower and/or upper permanent joints 11, 12 may also be obtained through vulcanisation.

Alternatively, the barrel portion 70 and the lower end portion 7b and/or the upper end portion 7a are made of the same material, for instance in one single piece, preferably h injection moulding.

The sleeve 6 is made of a fourth material having a relatively low city. The fourth material may be a material having similar or the same composition and/or properties as the same material as the second material.

The lower end n 7b of the teatcup liner 7 comprises a lower engagement member 14, which s the sleeve 6 in such a manner that the barrel portion 7c of the teatcup liner 7 is maintained in a stretched state in the sleeve 6. The lower engagement member 14 comprises, or is formed as, an annular flange extending outwardly at least beyond an inner diameter of an end e of the lower end 6b of the sleeve 6. The annular flange of the lower end portion 7b may extend radially or substantially radially outwardly with respect to the longitudinal centre axis x. The annular flange of the lower end portion 7b extends beyond and abuts the end surface of the lower end 6b of the sleeve 6.

The upper end portion 7a of the teatcup liner 7 comprises an upper engagement member 15, which engages the sleeve 6 at the upper end 6a of the sleeve 6. The upper engagement member 15 comprises, or is formed as, an upper annular flange extending outwardly at least beyond an inner diameter of an end e of 1O the upper end 6a of the sleeve 6. The annular flange of the upper engagement member 15 may extend radially or substantially radially outwardly with respect to the udinal centre axis x. In the embodiment disclose, the annular flange of the upper engagement member 15 of the upper end portion 7a abuts an outwardly bent part of the first material of the barrel portion 70, which in turn abuts the end surface of the upper end 6a of the sleeve 6.

The sleeve 6 comprises a sealing ring 17 extending around an outer e of the sleeve 6. The sealing ring 17 is configured to engage a surface, ally an end surface, of the connector 2, as will be described below.

Moreover, the sleeve 6 comprises a hole 18 h the sleeve 6, or through the wall of the sleeve 6. The hole 18 permits a pulsating vacuum to be applied in the ion chamber 9. The hole 18 is provided between the sealing ring 17 and the lower end 6b of the sleeve 6. 3O The lip member 3 is in the embodiment disclosed attached to the upper end portion 7a of the teatcup liner 7, as can be seen in Figs and 2. The lip member 3 is preferably detachably attached to the cartridge 1 by a snap connection 19. In Fig 2 the lip member 3 is shown in a detached state with respect to the teatcup liner 7 and the cartridge 1. Alternatively, the lip member 3 may be detachably attached to the sleeve 6.

The lip member 3 comprises or forms a lip 20, which surrounds and defines an opening 21 for the teat to the inner space 8. The lip 20 is also made of a relatively elastic material, possibly a material having similar or the same composition and/or properties as the first material of the barrel n 70.

It is to be noted that the lip member or the lip 20 as an ative may form an integrated part of the teatcup liner 7, preferably by being permanently joined to the upper end portion 7a, or being manufactured in one single piece with the upper end portion 7a or with the teatcup liner 7.

The connector 2, see also Fig 4, comprises a casing 24, which has a bottom wall 25 and a surrounding wall 26 having an inner surface.

The casing 24 defines a connection space 27. The bottom wall 25 is plane or substantially plane.

The connector 2, or the casing 24, comprises an inlet opening 28 for the cartridge 1 to the connection space 27, and an outlet opening 29 for the milk conduit 4. The outlet opening 29 extends through the bottom wall 25 and is configured to receive and hold the milk conduit 4. In the embodiment disclosed, the udinal centre axis x s concentrically through the casing 24 and through the inlet opening 28 and the outlet opening 29, wherein the bottom wall 25 extends perpendicularly, or substantially perpendicularly to the longitudinal centre axis x.

The connector 2 is connected to the cartridge 1 by means of locking means. The locking means is provided on the inner surface of the surrounding wall 26. Corresponding locking means is provided on the outer side of the sleeve 6. The corresponding g means is provided between the sealing ring 17 and the lower end 6b of the sleeve 6. The locking means may se on or more outer bayonet coupling parts 31 on the inner surface of the casing 24.

The corresponding g means may comprise one or more inner bayonet coupling parts 32 on the outer surface of the sleeve 6 of the cartridge 1. The outer bayonet coupling parts 31 and the inner bayonet coupling parts 32 form a bayonet coupling permitting secure g of the cartridge 1 in the connector 2. rmore, the connector 2 comprises an outer shell 34 extending beyond the inlet opening 28 of the casing 24. The outer shell 34 is tubular and attached to an end portion 24a of the casing 24. The is to protect the dge 1. The outer purpose of the outer shell 34 shell 34 may be made of a relatively rigid material, for instance as plastics or metal, such as stainless steel.

The casing 24 also ses an aperture 35 extending through the casing 24 into the connection space 27. Furthermore, the connector 2 or the casing 24 comprises a holding member 36 configured to hold the pulse conduit 5 in a flow communication with the aperture and the ing chamber 9 via the hole 18 for communicating a pulsating vacuum to the connection space 27 and to the pulsating chamber 9. The holding member defines a holding space, which is partly d by a side wall 37 and a bottom wall 38. An g 39 extends through the bottom wall 38.

The milk conduit 4, or short milk conduit, see also Fig 3, is tubular and comprises a first end portion 4a defining a first end, a second end portion 4b defining a second end, and a conduit portion 4c between the first end n 4a and the second end portion 4b. The milk conduit 4 s a milk channel 40 extending through the first end portion 4a, the conduit portion 40 and the second end portion 4b.

The first end of the milk conduit 4 may be defined or formed by a plane, or substantially plane, end surface from which the milk channel 40 s.

The first end portion 4a of the milk conduit 4 has an external tapering shape from the first end to the conduit portion 4c. The milk conduit 4 thus has a greater outer diameter at the first end compared to the outer diameter at the conduit portion 4c.

The first end portion 4a is configured to be received in the outlet opening 29 extending through the bottom wall 25 of the connector 2 of the teatcup. The first end portion 4a comprises a first circumferential groove 41 configured to engage the bottom wall 25, 2012/051459 see Fig 1. The first circumferential groove 41 is positioned at a distance from the first end and at a ce from the conduit portion 40.

The milk channel 40 of the first end portion 4a has an internal tapering shape from the first end towards the milk channel 40 of the conduit portion 4c.

The second end n 4b comprises a second circumferential groove 42, which is configured to be received in any suitable milk— receiving member or milk—collecting member, such as a claw, not disclosed. The second circumferential groove 42 is oned at a distance from the second end and at a distance from the conduit portion 4c. Also the second end portion 4b has an external tapering shape from the second end to the conduit portion 4c.

The milk conduit 4 is made of a hose material having a relatively high city in the order of the elasticity of the first material of the barrel portion. For instance, the milk conduit 4 may be manufactured of natural rubber, black rubber, silicone rubber or Thermoplastic Elastomers, TPE. The conduit portion 4c ses an bending area 43 having a locally decreased outer diameter, and thus a locally increased elasticity to e a predetermined area for bending of the milk t 4.

Also the pulse conduit 5, see also Fig 5, may be made of a hose material having a relatively high elasticity, possibly the same hose material as the material of the milk conduit 4. The pulse conduit 5 has a attachment end portion 5a to be engaged by the holding 3O member 36. The pulse conduit 5 defines or encloses a pulse channel 51 extending along the pulse conduit 5 through the attachment end portion 5a. The ment end portion 5a defines an opening 52 of the pulse channel 51. When the pulse t 5 is engaged by the g member 36, the opening 52 is positioned opposite to the opening 35 through the casing 24.

The attachment end portion 5a is configured to be received in an opening extending through the bottom wall 38 of the holding member 36. The attachment end portion 51 has a bottom surface 53 configured to abut the bottom wall 38, see Fig 1, when the pulse conduit 5 is mounted in the connector 2.

The assembling of the teatcup is now to be described. One assembling step is to produce the cartridge 1, wherein the p liner 7 is mounted in the sleeve 6. This mounting may be made in advance in connection with the manufacturing of the p. The teatcup liner 7 is then pulled through the sleeve 6, wherein the lower end portion 7b is introduced at the upper end 6a of the sleeve and pushed and pulled downwardly so that the lower end portion 7b passes the lower end 6b until the lower engagement member 14 of the lower snaps outwardly to abutment against the end surface end 6 of the sleeve 6. Thanks to the upper engagement member 15, the upper end portion 7a will not pass h the upper end 6a of the sleeve 6, but the engagement members 14 and 15 secure that the teatcup liner 7 and its barrel portion 7c is retained in a stretched state in the sleeve 6. In the stretched state, the teatcup liner 7 is ged in comparison with a rest state, in which the teatcup liner 7 is not subjected to any external forces, i.e. before the p liner 7 is d in the shell 6.

Thereafter the lip member 3 may be attached to the cartridge 1, wherein the lip member 3 is pressed onto the upper end 6a of the sleeve 6 so that the snap connection 19 locks the lip member 3 in a detachable manner on the cartridge 1.

The cartridge 1 is a eable component, together with or t the lip member 3, depending on the wear of the lip 21. The cartridge 1 and the lip member 3 are the components of the teatcup that are subjected to significant wear.

A further assembling step is the assembling of the connector 1. The outer shell 34 may be mounted to the casing 24 in advance or after mounting of the milk conduit 5 and the pulse conduit 5. The milk conduit 4 is mounted to the connector 2 by the introduction of the second end portion 4b through the inlet opening 28 and then through the outlet opening 29. The milk conduit 4 is then pulled WO 95288 through the connector 2 until the lower wall 25 of the casing 24 snaps into the first circumferential groove 41. The tapering shape the first end portion 4a facilitates the pulling of the milk conduit 4 into the snapping-in engagement.

In a similar manner, the pulse conduit 5 is mounted to the tor 2 by being pulled through the holding member 36 until the bottom surface 53 comes to abutment against the bottom wall 38, wherein the opening 52 of the pulse l 51 is opposite to the opening 35 h the casing 24.

The teatcup is then present as two main components, namely the cartridge 1 together with the lip member 3, and the connector 2 together with the milk conduit 4 and the pulse conduit 5. The milk conduit 4 and the pulse conduit 5 may be mounted to their respective components of the remaining milking equipment in any suitable manner. The milk conduit 4 may for instance be mounted by engagement of the second circumferential groove 42.

Finally, these two main components are connected to each other.

The dge 1, with or without the lip member 3, is then introduced into the connection space 27 of the connector 2 until the end nozzle penetrates the milk channel 40 at the first end portion 41, and abuts tightly the wall of the milk channel 40. Thanks to the shape of the end nozzle 19 and to the vely low city of the end nozzle 10 in combination with the vely high elasticity of the milk conduit 4 a tight connection is achieved. in this position of the cartridge 1 vis-a—vis the connector 2, the end surface of the casing 24 will abut the sealing ring 17 so that the space formed between the sleeve 6 and the casing 24 is tightly sealed, thereby permitting proper communication of the pulsating vacuum. it is to be noted that the sealing ring 17 alternatively may be provided on the connector 2, especiaily on the casing 24.

When the cartridge 1 has reach this position vis—a-vis the milk conduit, the cartridge is locked in the connector 2, by means of the bayonet coupling, i.e. the coupling of the outer bayonet ng part 31 and the inner t coupling part 32. This coupling may be achieved through a turning of the cartridge 1 in relation to the connector 2. It is to be noted that the coupling and locking of the cartridge 1 to the connector 2 may also be achieved by other locking means, e.g. a thread connection.

The present invention is not d to the embodiments disclosed but may be varied and modified within the scope of the following 1O claims.

The terms “upper” and “lower” used in the description and and the claims refer to the orientation disclosed in the figures approximate orientation when the teatcup is attached to the teat of an animal.

List of reference signs cartridge connector lip member milk conduit first end portion second end portion conduit portion pulse conduit attachment end portion sleeve upper end lower end teatcup liner upper end portion lower end portion barrel n pace pulsation chamber end nozzle lower permanent joint upper permanent joint lower engagement member upper engagement member sealing ring hole snap connection opening casing bottom wall surrounding wall connection space inlet opening outlet g outer bayonet coupling part inner bayonet coupling part outer shell WO 95288 aperture 36 holding member 37 side wall 38 bottom wall 4O milk channel 41 first circumferential groove 42 second circumferential groove 43 bending area 51 pulse channel 1O 52 opening 53 attachment circumferential groove

Claims (16)

What we claim is

1. A cartridge configured to form part of a p to be attached to a teat of an animal to be milked, the cartridge sing a sleeve having an upper end and a lower end, a teatcup liner mounted in the sleeve and having an inner space for receiving said teat, a pulsation chamber ed between an inner side of the sleeve and an outer side of the teatcup liner, 10 wherein the teatcup liner comprises an upper end portion located at the upper end of the sleeve, a barrel portion and a lower end portion extending beyond the lower end of the sleeve, 15 wherein the lower end portion forms an end nozzle beyond the lower end of the sleeve, wherein the end nozzle has a tapering external shape configured to be received in a milk conduit for transporting the milk from the cartridge to the milk conduit, wherein the barrel portion is the main part of the 20 teatcup liner, wherein the barrel portion is made of a first material having a relatively high elasticity, and the lower end portion is made of a second material having a vely low elasticity in comparison with the relatively high elasticity of the first material of the barrel portion, and 25 wherein the lower end portion ses a lower engagement member which engages the sleeve in such a manner that the barrel portion of the teatcup liner is maintained in a stretched state in the sleeve. 30

2. A cartridge according to claim 1, wherein the end nozzle has a tapering al shape.

3. A cartridge ing to claim 1 or 2, wherein the barrel portion is attached to the lower end portion by a permanent joint.

4. A cartridge according to claim 3, n the permanent joint is formed by melting of at least one of the first material and the second material at the permanent joint.

5. A cartridge according to any one of the preceding claims, n the lower engagement member comprises an annular flange extending dly and ng an end surface of the lower end of the sleeve. 10

6. A cartridge according to any one of the preceding claims, wherein the upper end portion comprises an upper engagement member which engages the sleeve at the upper end of the sleeve.

7. A cartridge according to claim 6, wherein the upper 15 engagement member comprises an upper annular flange extending outwardly beyond an inner er of an end surface of the upper end of the sleeve.

8. A dge according to any one of the preceding claims, the 20 upper end portion is made in a third material having a relatively low elasticity in comparison with the relatively high elasticity of the first material of the barrel portion.

9. A cartridge according to any one of the preceding claims, 25 wherein the sleeve further comprises a sealing ring extending around an outer surface of the sleeve, a hole through the sleeve, which hole is configured to permit a pulsating vacuum to be applied in the pulsation chamber and which 30 is provided n the sealing ring and the lower end of the sleeve.

10. A cartridge according to any one of the preceding , wherein the cartridge comprises a lip member provided at the upper end portion of the teatcup liner and forming a lip defining an opening 35 for the teat.

11. A cartridge according to claim 10, wherein the lip member is detachably attached to the p liner by a snap connection. 5

12. A teatcup comprising a cartridge according to any one of the ing claims and a milk conduit, wherein the milk conduit comprises a first end portion, a conduit portion and a second end portion, and a milk channel extending through the first end portion, the conduit portion and the second end n, and wherein an end 10 nozzle is introduced and held in the milk channel of the first end portion.

13. A teatcup according to claim 12, wherein the milk channel of the first end portion has an internal tapering shape from the first end 15 towards the milk channel of the conduit n.

14. A teatcup according to any one of claims 12 and 13, wherein the teatcup ses a connector connecting the cartridge to the milk conduit.

15. A cartridge substantially as herein described with reference to, and as shown in, the accompanying drawings.

16. A teatcup ntially as herein described with reference to, 25 and as shown in, the accompanying drawings.