HK1153122A - Suction teat unit - Google Patents

Description

本发明涉及根据权利要求1的总称的吸奶单元。

技术的地位

Ideally, a baby drinks from the mother's breast. However, there are several reasons why this is not always possible. For many years, it has been tried to develop nipples for baby bottles that allow the baby to suck in a way as natural as possible. The baby should be able to switch between the mother's breast and the bottle as little as possible. In this context, it is important that the baby cannot interrupt the milk flow by pressing the nipple mouthpiece too tight. At the beginning of the targeted development of nipples, it was also at the forefront that the nipple does not cause lasting damage to the baby's mouth. Furthermore, it should be prevented that a greedily drinking baby chokes. Therefore, it is proposed in the state of technology to use either small sucking openings or flow restrictors.

EP 1 532 957 discloses, for example, a nipple with a large sucking opening and a flow limiter arranged in the mouthpiece. Also in US 5 101 991 and BE 3 81523 the flow limiters extend into the mouthpiece.

EP 0 384 394 描述了一种乳头，该乳头包括第一流通限制器，该第一流通限制器具有一个大开口和第二流通限制器，该第二流通限制器具有一个较小的横截面，并且该第二流通限制器形成一个吸乳开口。

在WO 99/22693中，提供一种带有阀门的吸奶器，但不带有定义的横截面面积的限制器。

WO 2007/137440, WO 2007/137436 und WO 2007/137885 show relatively stiff, hardly deformable mouthpieces.

WO 03/013419 描述了相对较小的吸入口以及在嘴部外侧的较大通道口。通道口装有止回阀。

US 5 791 503 discloses a relatively complex suction nozzle unit having a reverse flow valve.

GB 347 368 discloses a nipple with a nipple opening and a flow restrictor with a smaller passage opening. The flow restrictor is located outside the mouthpiece.

US 3 207 349 shows a suction nipple with a one-way valve, which closes a passageway opening. The suction opening is described as a slit.

发明的描述

因此，本发明的任务是创造一个乳头单元，它可以实现尽可能自然的吸吮。

This task is carried out by a suction nozzle unit with the characteristics of patent claim 1. The suction nozzle unit for suctioning a liquid from a liquid container features a suction nozzle and a flow restriction device with a passage opening. The suction nozzle has a mouthpiece with a suction opening, from which liquid is extruded from the mouthpiece outward, and a base body formed on the mouthpiece which is expanded in the direction opposite to the mouthpiece. The flow restriction device determines a maximum flow of the liquid flowing through the suction opening from the liquid container. According to the invention, the flow restriction device is arranged outside the mouthpiece, and the suction opening has a larger cross-sectional area than the passage opening of the flow restriction device.

Thanks to the large opening, the teat, also called the nipple, can be shaped well during the sucking process, and it fits optimally to the mouth and tongue movements of the baby. The baby gets a similar feeling in the mouth as if he were sucking on a natural nipple of a mother's breast. The teat is pliable and is preferably not rigid over a significant part of its length when used as intended. Therefore, the teat is preferably deformable when used as intended.

Preferably, between suction opening and flow restriction, there is a milk channel existing which also has a minimum diameter equal to the diameter of the suction opening. If there are multiple milk channels existing, they at least collectively over their entire length show a flow opening which is greater than that of the flow restriction and which preferably corresponds to the diameter of the suction opening. Preferably, the inner diameter of the milk channel is approximately equal to the suction opening over its entire length. There is no further flow restriction in the area between the flow restriction and the suction opening which would limit the flow stronger or only approximately equal to the first mentioned flow restriction.

然而，唯一突出的是口腔内仅有一个乳头，因此口腔尽可能地灵活。

The cross-sectional area of the suction opening is many times larger than the cross-sectional area of the discharge opening of the discharge restrictor. Typical diameters for the suction opening are 3 to 8 mm and for the discharge restrictor 0.2 to 0.7 mm.

The mouthpiece may have the same softness and flexibility throughout its length. However, in a preferred embodiment, it becomes harder and/or stiffer towards the core. This change occurs continuously or stepwise depending on the design form. For example, this change may be achieved by increasing the wall thickness.

Suction opening and/or the adjacent milk canal may show a round, oval or elliptical cross section. They can be rotationally or mirror-symmetrically developed. However, they can also exhibit an asymmetrical shape. The same applies to the outer shape of the mouthpiece. For example, it can exhibit a round cross section over its entire length or a tooth-compatible shape (Dentalform named).

The flow restrictor may be formed in the sucking nipple itself or it may be located in another separate part of the sucking nipple unit. However, the flow restrictor is arranged outside the mouth piece, i.e. outside the part that is taken into the mouth by the sucking infant in accordance with the intended use. This way, the sucking infant cannot influence the flow restrictor through mechanical pressure or pull caused by its lip and mouth movements.

The invention consists of a sucking unit, which separates the functions of: natural adaptation and deformation of the mouthpiece, and limiting the flow rate, so that the baby does not choke.

发明的另一项任务是创造一个吸奶单元，即使使用吸奶单元中的活塞也能提供尽可能接近自然的吸奶。

This task is carried out by a suction nipple unit for suctioning a liquid from a liquid container. It comprises a suction nipple and a flow limiting device with a passage opening. The suction nipple comprises a mouthpiece with a suction opening and a base body extending in the direction of the mouthpiece from the mouthpiece. The flow limiting device determines a maximum flow of the liquid flowing from the suction opening out of the liquid container. According to the invention, the flow limiting device is arranged outside the mouthpiece and the suction nipple unit comprises a one-way valve arranged outside the mouthpiece, whereby the flow limiting device is arranged in the one-way valve or in a neighboring area thereof. A large suction opening is also advantageous here, but not necessarily essential. Similarly, the mouthpiece may also have strengthening elements, such as ribs, in this case. However, it is preferably smooth and/or un-reinforced.

Only atmospheric pressure or suction pressure prevails in this sucking unit. No overpressure is created. Milk therefore does not squirt into the suckling's mouth, but flows instead according to the suction created by the suckling in its mouth. The milk flow is approximately proportional to the suction created by the suckling.

这种乳头单元使得乳汁可以被纯粹真空驱动，而乳汁流出与舌头的其他尤其是蠕动运动几乎无关。当舌头后部向口腔上部运动时，不应有乳汁流出。当舌头后部向口腔下部运动时，乳汁则流出。

The present invention takes into account the knowledge that during breastfeeding, the baby does not switch between vacuum and atmospheric pressure. Instead, it maintains a basic vacuum throughout the entire breastfeeding process. In contrast to the arrangements according to the state of the art, the valve now closes when it reaches this basic vacuum. As soon as the absolute value of the installed vacuum exceeds this basic vacuum, the valve opens and milk or liquid can flow. Thus, the baby can take a break while maintaining the basic vacuum, breathe, recover, and gather new energy, as it also happens in the mother's breast. The invention preferably opens at a small underpressure of 1 to 90 mmHg, preferably 20 to 70 mmHg. Even more preferred values lie between 20 to 30 mmHg or 5 to 30 mmHg. These values lie in their absolute value slightly above a typical basic vacuum of a baby.

然而，进气口在吸乳过程中对乳汁流量没有影响。进气口的开度和进气口的运行方式不会影响乳汁流量。

If the reflux valve and flow restrictor are located outside of the mouthpiece, a deformation of the mouthpiece does not affect the operation of the reflux valve. Therefore, the baby can not exert any influence on the reflux valve by mechanical pressure and/or suction.

In a first embodiment, the check valve covers the passage opening of the flow limiter. In a preferred embodiment, however, the check valve does not cover the relatively small passage opening of the flow limiter but a larger opening. This opening is preferably arranged in the flow direction of the liquid before the flow limiter, i.e. towards the liquid reservoir. However, it may also be arranged downstream of the flow limiter in the flow direction.

In other words, in the shown embodiments, the opening of the flow-limiting member is located in the rigidly formed valve seat, i.e. in the base part. This opening may be covered and sealed by the valve membrane. However, it may also be located adjacent and lead into the dead volume.

In another embodiment, the opening of the flow limiter may be located in the vent membrane and be closed by sealing the membrane to the vent seat. In this case, the exhaust opening is located next to the vent seat and is not closed by the membrane but opens into the dead volume. The exhaust opening may be of the same size or larger than the opening of the flow limiter.

流速限制器可以设置在通风膜上方或下方。

If the valve and the flow limiter are located close to each other, the dead volume in which a vacuum must also be produced is minimized. The valve or the vacuum cleaner also operates reliably at low flow quantities.

Ventil is easily disassembled, and the suction nozzle unit is easily cleaned. If a membrane is used, it can be held in place by clamping individual parts.

Instead of a confined membrane with or without a clearly defined opening cross section, a bellows, a beak or a slit membrane can also be used.

In a preferred embodiment the suction opening has a larger cross-sectional area than the bypass opening of the flow restrictor. Preferably, the milk channel between the flow restrictor and suction opening has over its entire length a cross-sectional area which is larger than the cross-sectional area of the bypass opening and preferably at least of the size of the cross-sectional area of the suction opening. Alternatively, in combination with the check valve the suction opening may also have an equal cross-sectional area as the flow restrictor. The same applies to the milk channel.

其他有利的执行形式来源于从属专利权利要求。特别是从属专利权利要求的特征也可以不通过大的吸嘴单元的特征来实现。

简要描述绘图

The present invention relates to a feeding device for sucking nipples, in particular to a feeding device for sucking nipples for premature babies. In the drawing, Fig. 1 is a longitudinal section through a sucking nipple unit in a second embodiment and in a closed vent position; Fig. 2 is a sucking nipple unit as shown in Fig. 1 with an open vent; Fig. 3 is a longitudinal section through the sucking nipple as shown in Fig. 1 when not used; Fig. 4 is a cross section perpendicular to the longitudinal axis of the sucking nipple through an upper part of the sucking nipple as shown in Fig. 3; Fig. 5 is a longitudinal section through the sucking nipple as shown in Fig. 1 when used as intended; Fig. 6 is a cross section perpendicular to the longitudinal axis of the sucking nipple through an upper part of the sucking nipple as shown in Fig. 5; Fig. 7 is a graphical representation of the operation of a vent according to the state of the art and Fig. 8 is a graphical representation of the operation of the vent according to the invention in dependence on the sucking behavior of a suckling.

实现本发明的方法

图1至6示出了本发明的优选实施方式。

A baby bottle 1 or another liquid container 11 has on a neck 10 an outer thread 12 and a threading thread 13. On the threading thread 13 is screwed an inventive sucking nip unit 2, 3, 4. The sucking nip unit 2, 3, 4 comprises essentially three parts: a base part 2, a receiving head 3 and a sucking body or a sucking nipple 4. The base part 2 is preferably made of polypropylene (PP) or a polyamide. The receiving head 3 is made of a combination of PP or a polyamide with silicone, rubber or TPE. For the sucking nipple 4, silicone, a plastic on a silicone base, rubber or TPE is used.

Part two of the basic is formed-stable. It is essentially made up of a ring-shaped body 20 and a cone-shaped base 25. In the center of the cone-shaped base 25 is an entrance opening 24 for the unit, which connects the storage room of the container 1 to the outside, i.e. to the suction nozzle. The cone-shaped base 25 overhangs the ring-shaped body 20 and extends upwards to the inlet head 3. The discharge opening 24 is preferably arranged in the highest area, preferably at the flattened tip. This tip has an upper seal edge 240. Inside this seal edge 240, around the discharge opening 24, there is a plane surface 241.

On the upper side of the base ring 2 at the neck of the container 11 there is an outer sealing edge 27 extending around, which extends upward. This is preferably formed by the outermost circumferential edge of the base ring 2. Thereafter, extending radially inwardly, there is an outer sealing surface 270 arranged circumferentially and recessed.

Adjacent or separate from the outer seal surface 270 is an inner circulating seal edge 28 provided, which also protrudes upwards. Preferably, the seal edge 28 is interrupted by at least one ventilation opening 281, which leads to the outside. The way to the outside may be, for example, through a non-sealed screw connection to the milk bottle 1. In a side of the inner conical base 25, a ventilating valve or a ventilation opening 23 is preferably arranged.

This base part 2 can be set on the neck 11 of the container without being positioned relatively to it, in particular being twistedly secured. There is a lower blow 29 available, which limits how far the neck 11 can push the base part 2 in, i.e. how far the base part 2 can slide down on the neck 11. The blow 29 in the illustrated examples is an inner surface 29 in the upper area of the base ring 2. Other types of blows 29, for example protruding noses or ribs, are also possible.

The pickup head 3 is also ring-shaped and preferably rotationally symmetrically designed. The pickup head 3 essentially comprises two areas. The lower area is here formed by several plug elements 30, which form sections of a common outer shell that are evenly distributed over the circumference. The plug elements 30 form on their inner side a common inner thread 301. Instead of an inner thread, an outer thread may also be present, if the drink container 1 is provided with a corresponding inner thread.

插入元件30可以插入基部21部分的第2部分。基部和接收头上的固定带防止接收头3从基部上脱落。

优选地，上部接收头3的区域优选地由一种较软的材料制成，它可以在周边区域任意地形成。优选地，它指示周边支撑体或结构，例如支撑垫341，它与随后描述的吸体或吸嘴4协同作用。这些支撑结构也可以由一种坚硬的材料形成。

The pickup head 3 includes a projecting circumferential fortification edge 31 which defines a peripheral circumferential outer dense surface 310. It is plan shaped and runs approximately perpendicular to the long central axis of the pickup head 3.

在进气头3处设置了一个封闭的通风膜37。它覆盖了基体部分2的排出口24。通风膜37在它不覆盖排出口24的外围区域有一个小孔，该小孔对应通道口32。该通道口32位于基体环2的内表面241之上。

Ventil membrane 37 is preferably monolithic at the inlet head 3. Either it is only itself made of a soft material and the rest of the head 3 is made of a hard material. However, it may also be monolithic together with soft support structures 341 and attached, joined or sprayed on the hard part of the inlet head 3.

Ventil membrane 37 is surrounded by a rising and running collar 39, which can be formed of hard or soft material in one piece with the rest of the inlet head 3. This collar 39 preferably has running outer ribs, which are not shown here.

The nipple 4 has a conical, hemispherical or cup-shaped base body 40 and a mouthpiece 42 formed integrally therewith. The mouthpiece 42 has a liquid or milk channel 48 on it. This is also referred to as a sucking channel. The mouthpiece 42 is constricted in its outer circumference with respect to the base body 40, or the base body 40 is enlarged in its outer circumference with respect to the mouthpiece 42. It has a free end. The mouthpiece 42 is preferably hollow-cylindrically or conically shaped. It forms a thin-walled hollow body with an inlet opening and a suction opening 43. It is preferably made of a bendable and/or flexible material. It is preferably made of a single wall. Even if it is double-walled, it should be as bendable and flexible as possible, for example by having thin walls. The mouthpiece 42 may also be provided with internal structures, such as radial or axial ribs, knobs and depressions.

42 is the tip of the teat, and 43 is the opening. The 43 opening is connected to the container room via the passageway 32 and the flow opening 24, so that the baby can drink, for example, tea, water, or milk through this opening. The 43 opening is preferably surrounded by a circumferential flange 430 directed inward. This provides stability to the free end of the teat 42. Moreover, this protects the outer edge of the material from being bent inward, and it is better protected from mechanical impacts.

As an extension of the mouthpiece 42, however, already penetrating into the basic body 40, there is a skirt 46 extending towards the receiving head 3 provided. Preferably, a flange 460 projecting inwardly is formed at the skirt 46.

The base body 40 has its lower rim bent inwards, so that a radial inwards directed flange 41 arises. The suction nipple 4 can be placed on the base body 40 over the receiving head 3. In this way the skirt 46 is placed over the collar 39, so that the skirt flange 460 of the skirt 46 grips behind the collar rib and lies tightly against it. The flange 41 of the base body 40 grips the protruding edge between the upper and lower area of the receiving head 3 and lies flat and tightly against the outer sealing surface 310 of the same.

Thus, the suction nozzle 4 can be put on the head of reception 3, respectively, can be partly stuck through him. Then, the head of reception 3 can be inserted into the base part 2. The head of reception 3 can be inserted into the base part 2, when the base part 2 is free, but also, when it is already located on the neck of the container 1. As the base part 2 is still shifted in the axial direction relative to the head of reception 2, the suction nozzle 4 can be alternatively stuck over the first one, when the head of reception 3 and base part 2 are assembled.

Two threads, outer thread 12 and inner thread 301, are interlocked with each other in the neck 11 of the container. The receiving head 3 runs along the thread downwards. By it the base part 2 is pulled down until its lower strike. Base part 2 and receiving head 3 are now firmly attached to the container 1 and securely locked relative to each other. As a result, the outer sealing surface 270 of the base part 2 is pressed relative to the outer sealing surface 310 of the receiving head 3. They clamp the flange 41 of the suction nozzle 4 and thus ensure a liquid and air-tight connection between the suction nozzle 4, receiving head 3 and base part 2. Depending on the design, the lower edge 41 of the suction nozzle 4 can also be tightly clamped between the two parts 2, 3.

Ventil膜37形成一个回流止回阀，该回流止回阀通过环轴或枢轴370与剩余的吸入口连接。布置在外环轴370的通孔32形成一个流速限制器。该流速限制器32具有比随后的区域更小的横截面积，该区域被液体流过。特别是乳或中心管48和吸孔43具有更大的横截面积。然而，吸管48可以具有一个或多个收缩部分，这些收缩部分位于吸孔43附近。如图所示，通孔32和回流止回阀37布置在口部42外。

As shown in Figure 1, the exhaust valve 37 is closed. No liquid can enter the suction nipple 4 through the exhaust opening 24. The volume between the exhaust opening 24 and the passage opening 32 is relatively small.

如图2所示，当逆流阀37打开时，相对较大的出气口24被打开。流体可以经由出气口24流入通过口32，从而进入烟嘴42。

The sucking opening 43 and, in a preferred embodiment, also the milk channel 48 have a cross-sectional area that is many times larger than that of the passage opening 32. Typically, the cross-sectional area of the sucking opening 43 is more than 10 times, in particular more than 50 times and especially more than 100 times larger than that of the passage opening 32. The entire area of the sucking channel 48 that runs through the mouthpiece 42 typically has a cross-sectional area that is larger than that specified above. The typical diameter of the sucking opening 43 is 7 mm, while that of the passage opening is 0.25 to 0.7 mm.

The suction opening 43 or the suction channel 48 in the upper part has a round cross-section, as can be seen from figure 4. Since the mouthpiece 42 is relatively soft, it is deformed during use and the suction opening 43 or the suction channel 48 in the adjacent area may take, for example, an oval shape, as can be seen from figure 6.

The mouthpiece 42 may be formed in any desired manner, as long as it remains flexible and bendable. As is particularly evident in figure 3, the wall of the mouthpiece 42 can increase in thickness towards the head part 3. This process occurs stepwise. Typical wall thicknesses are: t1 around 0.5 mm, t2 around 1.5 mm, t3 and t4 around 2.0 mm. However, other masses are possible. Preferably, there is a rejuvenation 420 in the inner diameter of the mouthpiece 42, so that a deformable hollow space 421 is formed in the suction opening 43 area. As is particularly evident in figures 3 to 6, the cross-section of this hollow space 421 is deformed during the specified use, depending on the deformability of the baby and the suction process. The hollow space 421 can in particular become longer but narrower and change from a round cross-section to an oval cross-section. The shape of the suction nipple can change during the suction process.

Further variations of the illustrated example are within the scope of the invention. The following examples are given: In this example, both the flow limiter and the reverse vent are present. Further, several passage openings may be present as long as they collectively have a cross-sectional area for the flow of the liquid, which is smaller than the cross-sectional area of the suction opening 43. The flow limiter serving passage opening may also be arranged in the base part 2.

Instead of only one passage opening 32, several passage openings may be arranged over the periphery of the membrane. The area around the at least one passage opening may also be made of hard material and the soft part of the membrane may be adjacent thereto shaped. Instead of the described multi-part suction nozzle unit, an alternative suction nozzle unit with the claimed arrangement of large suction opening and backward displacement passage opening may also be present. For example, the liquid container may be provided with the discharge opening 24, which is sealed by the membrane. The discharge opening 24 may also be so small that it itself forms the passage opening and thus the flow restriction. The suction nozzle 4 may also be mounted in other ways. For example, the gusset 46 may be inserted into the collar 39. Instead of the flange 41 of the base body 40, other mounting types may also be selected. For example, the suction nozzle may directly contact the liquid container. The invention may also be applied to the suction nozzles mentioned at the beginning, for example as in EP 1 532 957.

The functional way of the invention is recognizable from Fig. 8. The volume 5, i.e. the integral of the volume flow curve of the sucked liquid in ml (milliliters) as a function of time in seconds s is illustrated by the volume 5 in Fig. 8. The curve 6 is the volume flow in ml/s as a function of time in seconds. The reference symbol 7 shows the physiological vacuum curve of the baby, where the vacuum is in mmHg and the time is also given in seconds. 8 denotes the trigger threshold of the valve, which is preferably located between 20 and 30 mmHg. As recognizable from Fig. 8, no milk flows in the phases in which the absolute value of the vacuum generated by the baby is below this trigger threshold. These phases are designated with A in Fig. 8. If the set vacuum is sufficient to open the valve, milk flows. These are the phases B. The sucking nozzle unit thus closes and opens cyclically with the sucking rhythm of the baby.

In contrast, Figure 7 depicts the behavior of a milk unit according to current technology. The same curves are marked with the same reference numbers. The milk flow is not interrupted and a continuous milk flow is created. The baby cannot take a break in between, but has to constantly suck milk, even if it only maintains the basic vacuum. This does not correspond to the situation at the mother's breast.

Alternatively, instead of the described suction nipple, other suction nipples can be used here. For example, the radially inwardly directed flange of the base body can be positioned with the opening plane of the base body, or it can also be directed downwards from the opening of the base body.

此外，代替吸入通道或裙边也可以存在一个内部连接元件，该内部连接元件具有不同的形状。例如，吸入通道可以具有向外部辐射的法兰，该法兰以相应的方式捕获接收单元，尤其是接收头。

The free end of the milk or suction channel need not necessarily penetrate into the main body. It is also possible that the suction channel ends with the end directed towards the main body of the mouthpiece. The free end of the suction channel is so formed that it allows a sealing, preferably plugable connection to the receiving unit, for example through the provision of suitable sealing media on or in the suction channel. In particular, this end region of the suction channel can be designed as a cone, which takes the receiving unit under pre-tension.

例如，管嘴和/或吸入通道可以具有内部结构，例如径向或轴向沟槽、脊、凹痕或突起。吸入通道也可以在其外表面具有类似的内部结构。基础体的内外表面也可以是平的或结构化的。

The mouthpiece may be double-walled over its entire length, with the two walls running parallel to each other and either being connected in the mouthpiece area or with the inner wall ending freely. The inner wall forms the suction channel.

The mouthpiece and/or the suction channel can be formed for example hollow-cylinder-shaped or conical stump-shaped both internally and/or externally. The suction opening can be chosen to be relatively large or small. The suction opening can, in particular, have an approximately the same cross-sectional area as the suction channel over its entire length. The suction opening can also have a smaller cross-sectional area than the suction channel. These variants can be combined arbitrarily with each other.

发明的吸奶单元允许尽可能自然的吸奶，因为嘴的形状可以被显著变形，而流量限制不会受到明显影响。

参考清单

1 container 11 neck 2 base 20 ring 21 slit 23 ventilation 24 outlet 240 upper seal 241 plane 25 inner cone 27 outer seal 270 outer seal surface 28 inner seal 281 ventilation 29 lower attack 3 intake 30 pin 301 internal thread 310 outer seal surface 32 passage 341 support cushion 35 cone 37 ventilation membrane 370 hinge 38 ventilation 39 collar 4 suction 40 base 41 flange 42 mouth 420 rejuvenation 421 void 43 suction 430 flange 46 petticoat 460 flange 48 milk channel/suction channel 5 volume curve 6 volume flow curve 7 vacuum curve of the baby 8 release threshold of the ventilator 1 to t4 wall thickness A milk flow interrupted B milk flows

Claims (13)

1. Teat unit for sucking a liquid from a liquid container (1), wherein the teat unit comprises a teat (4) and a flow restrictor with a through-opening (32), wherein the teat (4) comprises a mouthpiece (42), and a main body (40) which is formed integrally on the mouthpiece (42) and widens relative to the mouthpiece (42), wherein a suction opening (43) is present in the mouthpiece (42), and wherein the flow restrictor defines a maximum flow of the liquid passing through the suction opening (43) from the liquid container, wherein the flow restrictor is arranged outside the mouthpiece (42), and wherein the suction opening (43) has a greater cross-sectional surface area than the through-opening (32) of the flow restrictor, characterized in that the teat unit comprises a one-way valve (37) which is arranged outside the mouthpiece (42), and that the flow restrictor is arranged in an area adjacent to the one-way valve.
2. Teat unit according to Claim 1, wherein the teat unit has a receiving head (3) for receiving the teat (4), and wherein the flow restrictor is arranged in the receiving head (3).
3. Teat unit according to Claim 2, wherein the teat unit has a discharge opening (24) which is arranged upstream of the flow restrictor in the direction of flow of the liquid to the suction opening (43) and which has a greater diameter than the through-opening (32) of the flow restrictor, and wherein the one-way valve (37) closes or frees this discharge opening (24).
4. Teat unit according to one of Claims 1 or 3, wherein the one-way valve (37) is a diaphragm valve.
5. Teat unit according to one of Claims 1 to 4, wherein at least one suction channel (48) extends between flow restrictor and suction opening (43) and has, along its entire length, a greater diameter than the flow restrictor.
6. Teat unit according to Claim 5, wherein the suction opening (43) has approximately the same diameter as or a greater diameter than the suction channel (48).
7. Teat unit according to one of Claims 5 and 6, wherein the suction channel (48) has a constriction at a distance from the suction opening (43).
8. Teat unit according to one of Claims 1 to 7, wherein the ratio of the through-opening (32) to the suction opening (43) is approximately 1:10.
9. Teat unit according to one of Claims 1 to 8, wherein the suction opening (43) and/or the suction channel (48) extending in the mouthpiece has a diameter of 3 to 8 mm, and the through-opening (32) of the flow restrictor has a diameter of 0.2 to 0.7 mm.
10. Teat unit according to one of Claims 1 to 9, wherein the mouthpiece (42) is designed with a single wall or a double wall.
11. Teat unit according to one of Claims 1 to 10, wherein the mouthpiece (42) becomes stiffer, either continuously or in stages, towards the main body (40) from a free end comprising the suction opening (43).
12. Teat unit according to claims 3 and 4, wherein the one-way valve comprises a closed valve diaphragm with an area which covers the discharge opening (24) and with a peripheral area which does not cover the discharge opening (24), wherein the through-opening (32) is arranged in the peripheral area.
13. Teat unit according to claim 1, wherein the one-way valve (37) has a valve diaphragm and a valve seat, wherein the through-opening (32) of the flow restrictor is arranged in the valve diaphragm and can be closed by means of the valve diaphragm bearing sealingly on the valve seat, wherein the teat unit has a discharge opening (24) which is arranged in the valve seat in the direction of flow of the liquid towards the through-opening (32) before the flow restrictor wherein the discharge opening leads into a dead volume when the one-way valve is closed.