Connector for connecting pump hose section to pump bed of peristaltic pump

Abstract

A connector for connecting a pump hose section to a pump bed of a peristaltic pump is shown, where the connector comprises a first fluid path and a second fluid path associated with an end of the pump hose section, the first fluid path and the second fluid path intersecting in the connector, where the first fluid path and the second fluid path intersect in the connector. The connector is configured to be clamped to the opening of the pump bed by two clamping elements arranged on opposite sides of the connector, characterized in that at least one of the clamping elements is formed by a clamping arm having a first free end and a second connecting end connected to the body of the connector.

Description

Technical Field

[0001] This invention relates to a connector for connecting a pump hose section to a pump bed of a peristaltic pump. Background Technology

[0002] Such connectors are known from document WO 2005 / 111424 A1, in which the connector includes a first fluid path and a second fluid path associated with the end of a pump hose section, the first fluid path and the second fluid path intersecting in the connector, wherein the connector is configured to be clamped to the opening of the pump bed by two clamping elements arranged on opposite sides of the connector.

[0003] The connector in this prior art is made of soft PVC to provide the necessary flexibility for clamping the element into the pump bed opening. However, this configuration reduces the rigidity of the connection between the connector and the pump bed, which can cause connection problems, especially when the pump hose section is used for extended periods, such as in continuous renal replacement therapy (CRRT)—where a single pump section can be used continuously for several days. Furthermore, because the pump hose receiving sections associated with the first and second fluid paths are not arranged at the same horizontal level, the pump hose is effectively helical, causing the pump rotor's action on the pump tube to generate a force acting on the connector and tending to disengage the connector from the pump bed.

[0004] These problems have been described in WO 2014 / 147061 A1, which therefore proposes a configuration in which the connector is held in the pump bed opening by a spring arm pressed against the top surface of the connector instead of a clamping member, and in which the pump hose receiving section is arranged at the same horizontal level to avoid forces acting on the hose. However, the configuration shown in WO 2014 / 147061 A1 requires a complex manufacturing process for the connector because the connector cannot be manufactured solely by injection molding. Furthermore, the connector requires a different pump bed configuration and is therefore incompatible with prior art connectors known from WO2005 / 111424 A1.

[0005] Finally, EP 2660470 B1 provides another alternative configuration that also avoids the use of clamp-on connectors and uses tubular fluid path elements arranged in an X configuration to form the fluid path as snap-fit ​​elements. Summary of the Invention

[0006] The object of this invention is to provide an improved connector for connecting a pump hose section to the pump bed of a peristaltic pump.

[0007] This objective is achieved by the connectors described according to claims 1 and 5, respectively. Preferred embodiments of the invention are the subject of the dependent claims.

[0008] In a first aspect, the invention includes a connector for connecting a pump hose section to a pump bed of a peristaltic pump, wherein the connector includes a first fluid path and a second fluid path associated with an end of the pump hose section, the first fluid path and the second fluid path intersecting within the connector, and wherein the connector is configured to clamp to an opening in the pump bed by means of two clamping elements arranged on opposite sides of the connector. The first aspect is characterized in that at least one of the clamping elements is formed by a clamping arm having a first free end and a second connecting end connected to the body of the connector.

[0009] With this configuration, the flexibility of the clamping arm can be controlled by the shape of the clamping arm and the connection between the clamping arm and the main body, thus allowing for a more rigid and robust connection even after long-term use.

[0010] Specifically, the clamping arm can form a spring element that abuts against the pump stator, and particularly against one of the pump bed end sections, for pushing. This ensures proper fixing of the connector and ease of installation. Furthermore, the connection is unaffected by temperature and pump speed. In particular, a material that does not easily soften even during prolonged use can be used.

[0011] In an embodiment of the invention, the clamping arm extends freely from the connecting end to the free end, and / or is not connected to the body of the connector at a location between the free end and the connecting end.

[0012] In an embodiment of the invention, the clamping arm is formed of a plate element connected at one end to the body of the connector, wherein the main surface of the plate element extends parallel to the axis of rotation of the peristaltic pump rotor and / or perpendicular to the plane defined by the fluid path and the pump hose section connected to the fluid path, and the plate element extends from the connecting end to the free end in a direction perpendicular to the axis of rotation of the peristaltic pump rotor and / or in a direction parallel to the plane defined by the fluid path and the pump hose section connected to the fluid path.

[0013] In an embodiment of the invention, the length of the clamping arm, measured from the connecting end along the extension of the clamping arm to the free end in a direction perpendicular to the rotation axis of the peristaltic pump rotor and / or in a direction parallel to the plane defined by the fluid path and the pump hose section connected to the fluid path, is at least 2:1, preferably at least 3:1, relative to the height of the clamping arm measured in a direction parallel to the rotation axis of the peristaltic pump rotor and / or in a direction perpendicular to the plane defined by the fluid path and the pump hose section connected to the fluid path.

[0014] In an embodiment of the invention, the connector has a first pump hose receiving section and a second pump hose receiving section associated with a first fluid path and a second fluid path for receiving a first end and a second end of a pump hose section, respectively.

[0015] Specifically, the pump hose receiving section can be a tubular element, with the end of the pump hose section inserted into the tubular element.

[0016] In an embodiment of the invention, the connecting end of the clamping arm is connected to one of the pump hose receiving sections of the connector. In particular, the clamping arm may be formed by a plate-like element connected to and surrounding the pump hose receiving section, such that the end of the pump hose section passes through an opening in the plate-like element into a tubular element forming the pump hose receiving section and disposed on the rear side of the plate-like element.

[0017] In an embodiment of the invention, two clamping elements are formed by clamping elements having a second connecting end connected to the body of the connector.

[0018] Preferably, the connecting ends of the two clamping elements are respectively connected to one of the pump hose receiving sections of the connector. In particular, the first clamping element can be connected to the first pump hose receiving section, and the second clamping element can be connected to the second pump hose receiving section.

[0019] In addition, the two clamping elements may have intermediate sections that extend separately from the main body.

[0020] Whether the first end of the second clamping element is a free end or a connected end will depend on the implementation method.

[0021] In a first embodiment of the invention, two clamping elements are formed by clamping arms having a first free end and a second connecting end connected to the body of the connector. Preferably, in this case, the two clamping arms are connected to the body only at their connecting ends.

[0022] Furthermore, all the features described above regarding at least one clamping arm, particularly the plate-like form of the clamping arms and the features of how they are respectively connected to one of the pump hose receiving sections of the connector, are preferably adapted to both clamping arms.

[0023] In the second embodiment, only one of the clamping elements is formed as a clamping arm having the free end as defined above, while the other clamping element is connected to the body of the connector at both ends.

[0024] Specifically, another clamping element can be connected to the pump hose receiving section of the connector via a second connecting end, and to the connecting hose receiving section of the connector via a first connecting end.

[0025] In one embodiment, another clamping element may be formed by a plate element connected to the body of the connector at the second connection end, wherein the main surface of the plate element extends parallel to the rotation axis of the peristaltic pump rotor and / or perpendicular to the plane defined by the fluid path and the pump hose section connected to the fluid path, and the plate element extends from the second connection end to the first connection end in a direction perpendicular to the rotation axis of the peristaltic pump rotor and / or in a direction parallel to the plane defined by the fluid path and the pump hose section connected to the fluid path.

[0026] In an embodiment of the invention, the length of the other clamping element, measured from the first connecting end along the extension of the other clamping element to the second connecting end in a direction perpendicular to the rotation axis of the peristaltic pump rotor and / or in a direction defined by the fluid path and the pump hose section connected to the fluid path, is at least 2:1, preferably at least 3:1, relative to the height of the other clamping element measured in a direction parallel to the rotation axis of the peristaltic pump rotor and / or in a direction perpendicular to the plane defined by the fluid path and the pump hose section connected to the fluid path.

[0027] In an embodiment of the invention, another clamping element is not connected to the body of the connector between the first connecting end and the second connecting end.

[0028] In an embodiment of the invention, another clamping element may be formed of a plate-shaped element, which is connected to and surrounds the pump hose receiving section via a second connecting end, such that the end of the pump hose section passes through an opening in the plate-shaped element into a tubular element forming the pump hose receiving section and disposed on the rear side of the plate-shaped element, and / or is connected to and surrounds the connecting hose receiving section via a first connecting end, such that the end of the connecting hose section passes through an opening in the plate-shaped element into a tubular element forming the connecting hose receiving section and disposed on the rear side of the plate-shaped element.

[0029] In embodiments of the invention, another clamping element may have a third free end disposed on the clamping element at a position between the first connecting element and the second connecting element. Specifically, the free end may be formed of a plate-like element connected to the plate-like element forming the clamping element between the first connecting element and the second connecting element.

[0030] In an embodiment of the present invention, the third free end and the second connecting element can be connected to the end section of the pump bed opening.

[0031] In an embodiment of the invention, another clamping element does not have a third free end, but is formed by a single arm extending between the two connected ends.

[0032] In an embodiment of the invention, another clamping element is connected to the end section of the pump bed at a position between the two connecting ends.

[0033] The preferred embodiments of both the first embodiment with only one clamping arm and the second embodiment with two clamping arms are discussed below:

[0034] In embodiments of the invention, the clamping elements and / or clamping arms are shaped to match the shape of the end section of the pump to which they are connected.

[0035] Therefore, at least one or both clamping arms are shaped to match the shape of the end section of the pump bed to which they are connected.

[0036] In an embodiment of the present invention, the first clamping element has a rounded shape and the second clamping element has an angled shape.

[0037] Therefore, if there is only one clamping arm, the clamping arm can have a rounded shape or an angled shape, preferably a rounded shape.

[0038] In particular, the other clamping element may have an angled or rounded shape.

[0039] In one embodiment, the third free end and the second connecting end are connected to each other at an angle to form an angled shape of another clamping element.

[0040] In one embodiment, the clamping element has an angled or rounded shape in the intermediate section extending between the two connecting ends.

[0041] If there are two clamping arms, the first clamping arm has a rounded shape and the second clamping arm has an angled shape.

[0042] In embodiments of the invention, one of the clamping elements or clamping arms, preferably a first clamping element or clamping arm with a rounded shape, is provided with a connecting element for connection to a pop-out pin and / or sensor of the peristaltic pump. The connecting element may be provided on a protrusion disposed on the rear side of the clamping element or clamping arm and / or may be guided to face the bottom side of the pump bed.

[0043] In a second independent aspect, the invention includes a connector for connecting a pump hose section to a pump bed of a peristaltic pump, wherein the connector includes a first fluid path and a second fluid path associated with a first end and a second end of the pump hose section, respectively, the first fluid path and the second fluid path intersect in the connector, wherein the first fluid path forms an inlet fluid path and the second fluid path forms an outlet fluid path, the connector has a bottom side portion configured to face the bottom of the pump bed, wherein the connector has a first pump hose receiving section and a second pump hose receiving section associated with the first fluid path and the second fluid path for receiving the first end and the second end of the pump hose section, respectively, and wherein the connector has a first connecting hose receiving section and a second connecting hose receiving section associated with the first fluid path and the second fluid path for receiving the inlet connecting hose section and the outlet connecting hose section, respectively. The second aspect is characterized in that the second fluid path intersects below the first fluid path on the bottom side portion of the connector, and the second pump hose receiving section is positioned closer to the bottom side portion of the connector than the first pump hose receiving section.

[0044] The following configuration is formed: the outlet fluid path of the connector passes below the inlet fluid path, and the second pump hose receiving section on the outlet side of the receiving pump hose section is positioned closer to the bottom side of the connector than the first pump hose receiving section on the inlet side of the receiving pump hose section. Therefore, in this invention, the configuration of the outlet and inlet fluid paths is reversed compared to the prior art configuration discussed above. The inventors of this invention have surprisingly discovered that, through this unusual and simple solution, the problems associated with the helical configuration of the pump hose discussed above for the prior art configuration can be avoided, because even if the helical configuration still exists, the force generated by the pump rotor now acts in the direction toward the bottom side of the pump bed, and therefore the connection from the connector to the pump bed will not loosen even after prolonged use.

[0045] The first and second aspects of this invention are each independently protected by this document.

[0046] For example, the second aspect can also be used in connectors that do not have clamping arms, but are clamped to the pump bed opening by other forms of clamping elements, such as clamping elements connected to the body of the connector at both ends.

[0047] In a preferred embodiment, these two aspects are combined in a single connector.

[0048] Embodiments of the invention will now be discussed, which discuss other features that can be adapted to connectors according to the first aspect, connectors according to the second aspect, and combinations thereof.

[0049] In an embodiment of the invention, the connector is configured to be clamped to the opening of the pump bed by two clamping elements arranged on opposite sides of the connector, wherein the first clamping element is arranged on the side of the first pump hose receiving section, and the second clamping element is arranged on the side of the second pump hose receiving section.

[0050] In an embodiment of the invention, a first clamping element is arranged in a first quadrant of the connector extending between a first pump hose receiving section and a second connecting hose receiving section, and a second clamping element is arranged in a third quadrant of the connector extending between the first connecting hose receiving section and the second pump hose receiving section.

[0051] Preferably, the first clamping element has a rounded shape and / or the second clamping element has an angled shape.

[0052] In embodiments of the invention, the connector is provided with connecting elements for connection to ejectors, such as ejector pins of peristaltic pumps and / or sensors.

[0053] The connecting element may be arranged on the bottom side of the connector and / or arranged on the connector facing the bottom of the pump. The connecting element may have a pin and / or sleeve shape and / or protrude in the direction toward the bottom of the pump.

[0054] In an embodiment of the invention, the connecting element is arranged on one side of the first pump hose receiving section, and preferably in the first quadrant of the connector extending between the first pump hose receiving section and the second connecting hose receiving section.

[0055] In an embodiment of the present invention, the connecting element is arranged on the first clamping element.

[0056] In an embodiment of the invention, the connector body is formed by two tubular fluid path elements, including a first fluid path and a second fluid path, which are connected to each other at a point where they intersect. Each tubular fluid path element includes a pump hose receiving section at one end and a connecting hose receiving section at the opposite end. This configuration reduces the amount of material and weight required to manufacture the connector.

[0057] In embodiments of the present invention, the fluid path elements are connected to each other only where they intersect.

[0058] In embodiments of the invention, the fluid path elements are connected to each other at locations where they intersect, and additionally, the connecting hose receiving section of the first fluid path element and the pump hose receiving section of the second fluid path element are connected by clamping elements.

[0059] In an embodiment of the invention, at least one of the connecting hose receiving sections and / or at least one of the pump hose receiving sections is formed from the free end of the fluid path element.

[0060] In a first embodiment of the present invention, free ends of each free fluid path element of the connecting hose receiving section and / or pump hose receiving section are formed.

[0061] In the second embodiment, the connecting hose receiving section of the second fluid path element and the pump hose receiving section of the first fluid path element are formed from the free ends of the respective fluid path elements.

[0062] In embodiments of the invention, the connector includes a third fluid path connected to a first fluid path or a second fluid path, and a third connecting hose receiving section associated with the third fluid path for connecting a third connecting hose to the first fluid path or the second fluid path via the third fluid path. The third fluid path can be used, for example, for heparin infusion. For this purpose, the third connecting hose can be connected, for example, to a heparin pump.

[0063] In an embodiment of the invention, the third fluid path is provided by a third tubular fluid path element, which is connected to a first tubular fluid path element or a second tubular fluid path element via a first end, and preferably includes a third connecting hose receiving section at a second end of the third tubular fluid path element.

[0064] In an embodiment of the present invention, the third tubular fluid path element extends parallel to the second tubular fluid path element or the first tubular fluid path element, and preferably there is a certain distance between the third tubular fluid path element and the second tubular fluid path element or the first tubular fluid path element.

[0065] In an alternative embodiment of the invention, the third tubular fluid path and the second tubular fluid path element or the first tubular fluid path element are formed in a single tubular element.

[0066] In an embodiment of the present invention, the connector is formed into a single integral part by injection molding.

[0067] In embodiments of the invention, the clamping arm and / or connector are formed of a plastic material having a Shore hardness D of at least D60, preferably at least D70, and more preferably at least D75. By using a relatively hard plastic, the stiffness and connection performance of the connector can be improved.

[0068] In the first aspect, the clamping functionality is still guaranteed by using a clamping arm, because the clamping arm is flexible due to its shape and connection to one side of the body, thus eliminating the need for soft plastic.

[0069] In embodiments of the invention, the clamping arm and / or connector are formed of a plastic material having a Shore hardness D of a maximum D90, preferably a maximum D85.

[0070] Shore hardness D is preferably measured as defined in ASTM D2240-00 or DIN EN ISO 868.

[0071] In embodiments of the invention, the clamping arm and / or connector are formed of PVC, particularly rigid PVC.

[0072] The invention also includes a tubing assembly comprising a connector, a pump hose section, and two connecting hose sections connected to the connector as defined above according to the first and / or second aspects.

[0073] In embodiments of the present invention, the tubing is a medical tubing, particularly a disposable medical tubing.

[0074] In an embodiment of the invention, the tubing assembly is a blood tubing assembly, which includes a connector for connecting to a dialyzer disposed in one of the connecting tubing sections, preferably the outlet connecting tubing section.

[0075] The invention also includes a peristaltic pump comprising: a stator, wherein a pump bed is formed in the stator; a pump hose section inserted into the pump bed in an arcuate form; a rotor for acting on the pump hose section; and a connector as defined above according to the first and / or second aspects.

[0076] Peristaltic pumps can be particularly used for pumping medical fluids.

[0077] The invention also includes a peristaltic pump comprising: a stator, wherein a pump bed is formed in the stator; a pump hose section inserted into the pump bed in an arcuate form; a rotor for acting on the pump hose section; and a connector for connecting the pump hose section to the pump bed, wherein the connector includes a first fluid path and a second fluid path associated with a first end and a second end of the pump hose section, respectively, wherein the first fluid path forms an inlet fluid path and the second fluid path forms an outlet fluid path, the first and second fluid paths intersect in the connector, and the connector has a bottom side facing the bottom of the pump bed. The connector has a first pump hose receiving section and a second pump hose receiving section associated with the first and second fluid paths for receiving the first and second ends of the pump hose section, respectively. The peristaltic pump includes a main pump operating mode in which the rotor rotates in a first direction to move along the pump hose section in a direction from the first end to the second end of the pump hose section. According to a second aspect of the invention, the second fluid path intersects the first fluid path on the bottom side of the connector, and the second pump hose receiving section is positioned closer to the bottom side of the connector than the first pump hose receiving section.

[0078] The main pump operating mode can be used during treatments performed by the pump, such as dialysis.

[0079] The present invention also includes medical devices, particularly dialysis machines, which include at least one pump as described above.

[0080] In an embodiment of the invention, the medical device includes a controller configured to control at least one pump to operate in a main operating mode during treatment performed by the medical device. Attached Figure Description

[0081] The invention will now be described with reference to preferred embodiments and the accompanying drawings.

[0082] The attached diagram shows:

[0083] Figure 1 This is a top view of the first embodiment of the connector of the present invention.

[0084] Figure 2 yes Figure 1 A perspective view of the first embodiment shown.

[0085] Figure 3 From Figure 1 and Figure 2 The side view shown is of the pump bed side in relation to the first embodiment.

[0086] Figure 4This is an embodiment of the peristaltic pump of the present invention. The peristaltic pump includes a connector and a corresponding hose section as in the first embodiment, wherein the pump hose section is connected to the pump bed of the peristaltic pump via the connector.

[0087] Figure 5 Shown in 3D Figure 4 The diagram illustrates the direction of fluid flow and the force applied to the connector by the pumping action.

[0088] Figure 6 This is a perspective view of a second embodiment of the connector of the present invention.

[0089] Figure 7 yes Figure 6 A cross-sectional view of the second fluid flow path shown in the second embodiment.

[0090] Figure 8 It shows Figure 6 Cross-sectional views of the first and third fluid flow paths of the second embodiment shown;

[0091] Figure 9 This is the third implementation of the connector.

[0092] Figure 10 A fourth embodiment of the connector is shown in a perspective view.

[0093] Figure 11 The fourth embodiment is shown in top view.

[0094] Figure 12 A fifth embodiment of the connector is shown in a perspective view.

[0095] Figure 13 The fifth embodiment is shown in top view. Detailed Implementation

[0096] Figures 1 to 3 A first embodiment of the connector according to the present invention is shown, and Figure 4 and Figure 5 A pump bed 61 is shown that connects pump hose section 35 to peristaltic pump 60 using the connector of the present invention. Figures 6 to 8 A second embodiment is shown; however, the second embodiment differs from the first embodiment only in the third fluid path, so that all other discussions also refer to both embodiments. Figure 9 , Figure 10 and Figure 11 as well as Figure 12 and Figure 13The third to fifth embodiments are shown respectively. The third to fifth embodiments differ from the first or second embodiments in terms of the configuration of the first or second clamping element. In this example, the first or second clamping element has a second connecting end connected to the body. However, all other discussions also apply to the third to fifth embodiments.

[0097] In such Figure 4 In the peristaltic pump shown, the pump hose section is inserted into the pump bed 61 in an arc shape to form a pump circuit, wherein, Figure 4 The end of the rotor 64, schematically depicted, acts on the pump hose section. Through the action of the end of the rotor 64, the pump hose section is compressed between the rotor and the pump bed 61, thereby closing the flow path inside the pump hose section at the corresponding location. Thus, by the rotation of the rotor 64, fluid is pumped from the inlet position 16 of the pump hose section along the pump hose section to the outlet position 26 of the pump hose section.

[0098] The peristaltic pump 61 can be, for example, a roller pump, wherein rollers are disposed at the ends of the rotor 64 for action on the pump hose section.

[0099] The connector 1 of the present invention is configured to releasably connect a pump hose section to a pump bed 61. In particular, the pump bed 61 has a pump bed opening 65 provided on a side, wherein the connector 1 is inserted between end sections 62 and 63 of the pump bed, the end sections 62 and 63 forming the sidewall of the pump bed opening.

[0100] Connector 1 includes a first fluid path 10 and a second fluid path 20 associated with a first end 16 and a second end 26 of pump hose segment 35, respectively, wherein the fluid paths intersect within the connector. The first end 16 and the second end 26 of the pump hose segment are respectively connected to one end of the first fluid path 10 and the second fluid path 20 of the connector. Connecting pump hose segments 15 and 25 are connected to opposite ends of fluid paths 10 and 20.

[0101] Specifically, the first fluid path 10 of connector 1 is provided with a first pump hose receiving section 11 and a first connecting hose receiving section 12. The first pump hose receiving section 11 is used to receive the first end 16 of the pump hose section 35, and the first connecting hose receiving section 12 is used to receive the connecting hose section 15, which is the inlet connecting hose section in this configuration. Furthermore, the second fluid path 20 is provided with a second pump hose receiving section 21 and a second connecting hose receiving section 22. The second pump hose receiving section 21 is used to receive the second end 26 of the pump hose section, and the second connecting hose receiving section 22 is used to receive the connecting hose 25, which is the outlet connecting hose in this case.

[0102] Furthermore, in the illustrated embodiment, the connector is provided with a third fluid path 50 connected to the second fluid path 20. The third fluid path 50 is provided with a third connecting hose receiving section 51 for receiving another connecting hose 55, which may be used for heparin infusion, for example. However, the third fluid path is an optional feature.

[0103] According to a first aspect of the invention, the connector is configured to be clamped to an opening 65 of the pump bed by two clamping elements arranged on opposite sides of the connector 1, wherein at least one or both clamping elements are formed by clamping arms 30, 40, having first free ends 31, 41 and second connecting ends 32, 42 connected to the body of the connector 1. Specifically, at least one clamping arm may be connected to the body only by the connecting ends 32, 42, wherein the remaining clamping arms extend separately from the body to the free ends 31, 41.

[0104] This configuration provides a more reliable and stable connection between the connector 1 and the pump opening than existing configurations. In particular, because at least one of the clamping elements is formed as a clamping arm, its shape and the fact that it is connected to the body only on one side of the clamping arm allow for controlled deformation of the clamping arm relative to the body, thus achieving a robust connection with the pump opening 65.

[0105] In all embodiments, both clamping elements 30 and 40 have a second connecting end through which they are connected to the body. Furthermore, clamping elements 30 and 40 have intermediate segments 35 and 45 extending separately from the body. The first end is a free end, and whether the clamping element is a clamping arm or a connecting end depends on the configuration.

[0106] exist Figures 1 to 8 In the first and second embodiments shown, both clamping elements 30 and 40 are formed as clamping arms having a first free end and a second connecting end, wherein intermediate segments 35 and 45 extend between the first free end and the second connecting end.

[0107] In the third to fourth embodiments, one of the clamping elements 30 and 40 is formed as a clamping arm having a first free end and a second connecting end, wherein the intermediate segments 35 and 45 extend between the first free end and the second connecting end, and the other clamping element 40 and 30 has a first connecting end and a second connecting end, wherein the intermediate segments 45 and 35 extend between the first connecting end and the second connecting end.

[0108] Furthermore, in these embodiments, the first connecting end of the connecting element having two connecting ends is connected to the connecting hose receiving section.

[0109] exist Figure 9 In the third embodiment shown, the first clamping element 30 is formed as a clamping arm having a first free end 31 and a second connecting end 32. The second clamping element 40 has two connecting ends 41 and 42 respectively connected to the body of the connector. Specifically, the first connecting end 41 is connected to the connecting hose receiving section 12 of the first fluid path element 10, and the second connecting end 42 is connected to the pump hose receiving section 11 of the first fluid path element 10. Furthermore, the clamping element 30 has a third free end 43, which is connected to the clamping element and to an intermediate section 45 extending between the two connecting ends 41 and 42, with the free end 43 extending outward.

[0110] exist Figure 12 and Figure 13 In the fifth embodiment shown, the first clamping element 30 is formed as a clamping arm having a first free end 31 and a second connecting end 32. The second clamping element 40 has two connecting ends 41 and 42 respectively connected to the body of the connector. However, in this embodiment, the second clamping element 40 does not have an additional third free end, but only has an intermediate segment 45 extending from the first connecting end 41 to the second connecting end 42.

[0111] exist Figure 10 and Figure 11 In the fourth embodiment shown, the second clamping element 40 is formed as a clamping arm having a first free end 41 and a second connecting end 42. The first clamping element 30 has two connecting ends 31 and 32 respectively connected to the body of the connector. As in the fifth embodiment, the first clamping element 30 with two connecting ends does not have an additional third free end, but only has an intermediate section 35 extending from the first connecting end 31 to the second connecting end 32.

[0112] The clamping elements or arms 30, 40 are essentially plate elements extending from their connection to the body of the connector to their free ends or first connecting ends and / or third free ends, wherein the shape of the plate elements matches the contour of the end segments 62 and 63 of the pump bed 61 to which they are connected, and the main surface of the plate elements extends parallel to the axis of rotation of the rotor. In particular, the clamping elements or clamping arms abut against the end segments 62 and 63 of the pump bed 61 at least with a portion of the intermediate segments 35, 45, such that the contour of the end segments 62 and 63 of the pump bed 61 matches at least a portion of the intermediate segments.

[0113] In all embodiments, the first clamping arm or clamping element 30 has a rounded shape, while the second clamping element or clamping arm 40 has an angled shape. Both the rounded and angled shapes correspond to the corresponding rounded and angled shapes of the bed end sections 62 and 63 to which the first and second clamping arms or clamping elements 30 and 40 are connected. Specifically, the first and second clamping arms or clamping elements 30 and 40 extend around the bed end sections 62 and 63.

[0114] For example, specifically from Figure 5 As can be seen, pump end sections 62 and 63 each have wall sections extending substantially parallel to the rotation axis of the rotor 64, and clamping arms or elements 30 and 40 are connected to the wall sections. Furthermore, pump end sections 62 and 63 have protrusions at their upper ends that project from the side walls and extend above the clamping arms or clamping elements, such that the connector is held in place by the shape of the clamping arms or clamping elements extending around the wall sections of pump end sections 62 and 63 in the plane formed by the pump hose sections, and held in a direction perpendicular to them, i.e., parallel to the rotation axis of the rotor, by the protrusions.

[0115] In order to insert the connector into the pump bed opening, at least one clamping arm is deformed to bypass the protrusion until the clamping arm or clamping element is securely seated below the protrusion.

[0116] For example in Figures 1 to 3 As shown, clamping arms or elements 30 and 40 are connected to the first pump hose receiving section 11 and the second pump hose receiving section 21 by means of their second connecting ends 32 and 42, respectively.

[0117] In an embodiment, if the clamping element is formed as a clamping arm, the connection is the only connection between the clamping arm and the body, such that the clamping arm can deform relative to the pump hose receiving section due to the flexibility of the clamping arm at its connecting ends 32, 42 and along its extension from the connecting ends to the free ends 31, 41.

[0118] exist Figure 9 and Figure 12 , Figure 13 In the illustrated embodiment, this applies to the first clamping arm 30, while the second clamping element 40 is also connected to the body at its second end 41, such that the primary flexibility for clamping the connection is provided by the first clamping arm. Figure 10 , Figure 11 In the embodiment shown, this applies to the second clamping arm 40, while the first clamping element 30 is also connected to the body at its second end 31, such that the main flexibility for clamping the connection is provided by the second clamping arm.

[0119] Clamping arms 30 and / or 40, or therefore airfoil spring arms, can deform relative to the body for insertion into the pump bed opening.

[0120] exist Figure 9 In the illustrated embodiment, the angled form of the second clamping element 40 is provided by a portion of an intermediate section 45 extending from the second connecting end 42 and a third free end 43, which are connected at an angle to each other. Therefore, contact with the angled end section of the pump bed is provided by the second clamping element 40 between the second connecting end 42 and the third free end 43. The first connecting end 41 extends from the connecting hose receiving section 12 to the position where the intermediate section 45 extending from the second connecting end 42 and the third free end 43 are connected at an angle.

[0121] In the fourth and fifth embodiments, the first connecting ends 31 and 41 are connected to Figure 9 The outer end of the third free end 43 in the middle is such that the second connecting element does not have a free end.

[0122] Specifically, in the fourth and fifth embodiments, the clamping elements 30 and 40, which are not formed as clamping arms, extend from the first connecting ends 31 and 41 via intermediate sections 35 and 45 that include the entire outline connected to the corresponding end sections of the pump bed, to the second connecting ends 32 and 42. Therefore, in Figure 10 and Figure 11 In the middle, the middle section 35 has a rounded shape, and... Figure 12 and Figure 13 In the middle section 45, there is an angled shape.

[0123] Other features relevant to all implementations are described below.

[0124] As from Figure 2 and Figure 3 as well as Figure 9 As can be seen, the plate-like structure forming the clamping arms and / or clamping elements 30 and 40 extends around the pump hose receiving section, such that the opening provided by the pump hose receiving section for receiving the end of the pump hose section 35 is set as a hole in the plate-like structure, which extends outward from the pump hose receiving section to form the clamping arms and / or clamping elements.

[0125] Furthermore, in all embodiments, the intermediate sections 35 and 45 are formed by plate elements.

[0126] The plate-like shape of the clamping arm and / or clamping element extends substantially parallel to the axis of rotation of the rotor and has a shape that follows the contour of the pump bed end sections 62 and 63 in a plane formed by the pump hose section that is perpendicular to the axis of rotation of the rotor.

[0127] For example, in particular Figure 2 and Figure 4 as well as Figure 9 It can also be seen that the first clamping arm 30 is provided with a connecting element 34, which is disposed on an element 33 protruding from the rear side of the clamping arm 30. The connecting element 34 extends to the bottom side of the connector and is connected to the pop-out pin of the peristaltic pump and / or the sensor.

[0128] The ejector 67 is in Figure 4 As shown, an upward force is generated on the first clamping arm 30 to eject the connector from the pump bed opening. Additionally, connector 34 can also be used to sense the presence of the connector within the pump bed opening.

[0129] The shape of connector 34 can be, for example, shown in the second embodiment. Figure 6 and Figure 7 As seen in the diagram, the connector is the same in this respect as in the first aspect. In particular, the connector has the shape of a cylindrical member that extends parallel to the axis of the rotor 64 when connected to the pump bed, wherein the pins of the ejector actuator and / or sensor are received from below in the opening of the connecting element 34.

[0130] According to a second aspect of the invention, a second fluid path 20 forming an outlet fluid path for the pump hose section passes through a first fluid path 10 forming an inlet fluid path on the bottom side of the connector. Furthermore, a second pump hose receiving section 21 is positioned closer to the bottom side of the connector 1 than a first pump hose receiving section 11, see particularly [reference needed]. Figure 3 This means that when the connector is connected to the pump bed, when measured in the axial direction along the axis of the rotor, the second pump hose receiving section 21 is positioned closer to the bottom side of the pump bed than the first pump hose receiving section 11, the bottom side of the connector being the side of the connector facing the bottom 66 of the pump bed when inserted into the pump bed opening.

[0131] With this configuration, the pump hose section connecting the inlet-side pump hose receiving section 11 and the outlet-side pump hose receiving section 21 still retains a helical shape. However, contrary to the solutions of the prior art, the outlet side 26 of the pump hose is positioned closer to the bottom of the pump bed than the inlet side 16 of the pump hose section, causing the helical shape of the pump hose to shift towards the bottom side of the pump bed in the pumping direction. Consequently, the vertical force generated by the rotor's action on the pump hose section... Figure 5The fluid acts towards the bottom side of the pump bed in the direction 70 indicated in the invention, rather than towards the top side and thus away from the pump bed as in prior art solutions. By simply swapping the relative positions of the inlet fluid path 10 and the outlet fluid path 11 relative to prior art solutions, the long-term stability of the connection can be decisively improved by the second aspect of the invention.

[0132] In this regard, we note that while it is generally preferable to arrange the two pump hose receiving sections at the same horizontal level relative to the pump's axial direction to completely avoid a helical configuration, this would require a very complex manufacturing process for the connector, as the fluid path can no longer be formed by injection molding.

[0133] In particular, such as from Figure 7 and Figure 8 As can be seen, Figure 7 and Figure 8 The connector is shown from the bottom side in a cross-section along the first fluid path 10 and the second fluid path 20 for the second embodiment. However, in this respect, the second embodiment is the same as the first embodiment; if one fluid path passes under the other without bending within the fluid path, this inevitably leads to a certain axial displacement of the pump hose receiving sections 11 and 21. However, fluid paths with bends cannot be formed by injection molding. Therefore, the invention according to the second aspect retains different axial positions of the pump hose receiving sections but avoids the problems associated with them as described above.

[0134] As indicated above, the connector is provided with a connecting element 34 that extends to the bottom side of the connector and connects to the ejector and / or sensor of the peristaltic pump. The ejector 67 is located in... Figure 4 As shown, an upward force is generated on the connecting element 34 to eject the connector from the pump bed opening. Additionally, an ejector 67 can also be used to sense the presence of the connector within the pump bed opening.

[0135] The connecting element 34 is arranged on one side of the first pump hose receiving section 11, and more specifically in the first quadrant of the connector extending between the first pump hose receiving section 11 and the second connecting hose receiving section 22.

[0136] Therefore, when ejector 67 is actuated, the connector is initially separated from the pump bed in the first quadrant and thus on one side of the first pump hose receiving section 11. In contrast, the connector is initially kept connected to the pump bed in the third quadrant of the connector, which extends between the first connecting hose receiving section 12 and the second pump hose receiving section 21, and is thus located on one side of the second pump hose receiving section 21.

[0137] The tilting motion produced by the arrangement of the connecting element 34 described above has another advantage. The rotor of the peristaltic pump can be equipped with, for example, radial pins as described in US 4,545,744 A. Two pins can also be attached to oppositely positioned sides.

[0138] When the first pump hose receiving section 11 is raised relative to the pump bed and the second pump hose receiving section 21 is not raised, the radial pin can be easily moved from the connector side to below the end of the pump hose connected to the first pump hose receiving section 11, which forms the inlet fluid path when rotating in the normal direction of rotation of the pump rotor, so as to raise the pump hose away from the pump bed. In contrast, if both quadrants are raised simultaneously, one or more pins may become stuck in the pump hose system. This is prevented by the tilting motion when the connector pops out.

[0139] Furthermore, the connector is configured to clamp to the opening of the pump bed by two clamping elements 30, 40 arranged on opposite sides of the connector. The first clamping element 30 is arranged on the side of the first pump hose receiving section 11 and more specifically in a first quadrant extending between the first pump hose receiving section 11 and the second connecting hose receiving section 22. The second clamping element 40 is arranged on the side of the second pump hose receiving section 21 and more specifically in a third quadrant extending between the first connecting hose receiving section 12 and the second pump hose receiving section 21. Additionally, the first clamping element 30 has a rounded shape and the second clamping element 40 has an angled shape.

[0140] On one hand, a key / lock principle is created by connecting the circular recess of the first clamping element 30 to the circular protrusion of the pump housing and the angled recess 40 of the second clamping element to the angled protrusion of the pump housing. Furthermore, since the connecting element 34 is arranged in the first quadrant of the connector on the side of the first clamping element 30 with its circular shape, the tilting movement for ejecting the connector is simplified, as a connection made with a circular shape is easier to open than one made with an angled shape.

[0141] According to the configuration of the second aspect and the corresponding arrangement and / or circular and angular shapes of the connecting elements described with respect to the second aspect of the invention, which are independent of the first aspect, different connectors may also be provided, such as connectors in which the clamping elements 30 and 40 are not formed by clamping arms having free ends, such as the connector shown in WO 2005 / 111424 A1.

[0142] Furthermore, the arrangement of the connecting elements and / or the rounded and angled shapes described with respect to the second aspect of the invention also apply to the first aspect and are independent of the second aspect.

[0143] Furthermore, the two aspects can be combined in a connector, for example, as shown in the embodiment.

[0144] Now refer to Figure 7 and Figure 8 The shape of the fluid path inside the connector is further described, and this shape is applicable to the connector according to the first aspect and the connector according to the second aspect.

[0145] As from Figure 7 and Figure 8 As can be seen, pump hose receiving sections 11 and 21 have a larger diameter than connecting hose receiving sections 12 and 22, but extend parallel to connecting hose receiving sections 12 and 22. Between the pump hose receiving sections and the connecting hose receiving sections, the first fluid path and the second fluid path each have connecting passages 13 and 23, which have straight extensions and at least a portion of their extensions have a continuously decreasing diameter or cross-section.

[0146] However, the connecting hose receiving section is not arranged to be collinear with the corresponding pump hose receiving section, but is shifted to the bottom or top side relative to the corresponding pump hose receiving section.

[0147] Specifically, for the second fluid path 20 that intersects at the bottom, the connecting hose receiving section 22 is arranged such that its centerline is moved towards the bottom relative to the centerline of the pump hose receiving section 21, such that the sidewall of the connecting passage 23 has a straight shape at the bottom and a tapered shape at the top. For the fluid path 10 that passes through at the top, the centerline of the connecting hose receiving section 12 is positioned towards the top away from the centerline of the corresponding pump hose receiving section 11, such that the wall section of the connecting passage 13 has a straight extension at the top and a tapered shape at the bottom.

[0148] Due to this configuration, and because the connecting passages 13 and 23 intersect at a location where the diameter has already decreased, the axial displacement between pump hose receiving sections 11 and 21 is reduced compared to a configuration where the pump hose receiving section would be collinear with the connecting hose receiving section. Nevertheless, as from... Figure 3 As can be seen, there is still a certain degree of axial displacement that leads to the helical configuration.

[0149] The first and second aspects of the invention are, in principle, independent of each other. However, preferably, and in the illustrated embodiments, they are combined within the connector of the invention.

[0150] In a third aspect of the invention, which can be combined firstly with the first aspect and / or the second aspect, the body of connector 1 is formed of two tubular fluid path elements, each comprising a first fluid path 10 and a second fluid path 20, which are connected to each other at locations where they intersect. Thus, the body is essentially formed of two intersecting tubular elements.

[0151] As from Figures 1 to 5 As can be seen, in this implementation, the tubular fluid path elements are connected only where they intersect each other, and are not included in the housing, nor are they provided with a base plate connecting them. Figure 9 In the illustrated embodiment, the tubular fluid path elements are connected at their intersections, and the pump hose receiving section 21 of the second fluid path element 20 is connected to the connecting hose receiving section 12 of the first fluid path element 10 via a clamping element 40. However, also in this embodiment, the tubular fluid path elements are not provided with a base plate for connecting them.

[0152] This reduces the amount of material needed to manufacture the connector and its weight.

[0153] With the main body formed by two tubular fluid path elements, at least one or both of the connecting hose receiving sections 12 and 22 are formed from the free ends of such tubular fluid path elements. Furthermore, at least one or both of the pump hose receiving sections 11 and 21 are also formed from opposite free ends of the tubular fluid path elements.

[0154] exist Figures 1 to 3 as well as Figures 10 to 13 In the illustrated embodiment, the third fluid path 50 is provided by a third tubular fluid path element 51, which is connected to the second tubular fluid path element forming the second fluid path and extends parallel to the first tubular fluid path element forming the first fluid path, but at a certain distance relative to the first tubular fluid path element. Therefore, in the first, fourth, and fifth embodiments, the third fluid path 50 is also formed by a tubular fluid path element that is separate from the first tubular fluid path element and connects to the second tubular fluid path element 21 at a position between the intersection and the connecting hose receiving section 22. Due to the distance between the third tubular fluid path element and the first tubular fluid path element, the connection between the corresponding hose and the corresponding connecting hose receiving section is simplified.

[0155] Apart from the location and configuration of the third fluid path 50 Figures 6 to 8The second embodiment shown is identical to the first embodiment in all respects. Specifically, in the second embodiment, the tubular fluid path element 50' forming the third fluid path 50 is directly adjacent to the first tubular fluid path element forming the first fluid path, such that the two fluid paths extend within a single common tubular element. Furthermore, the third fluid path 50 connects to the second fluid path 20 at the location where the second fluid path 20 intersects with the first fluid path 10.

[0156] exist Figure 9 In the third embodiment shown, the third fluid path element is constructed as in the second embodiment. In another alternative embodiment, Figure 9 The third fluid path element of the connector can also be constructed as in the first embodiment, that is, separately from the first fluid path element as in the fourth and fifth embodiments.

[0157] In a preferred configuration, the connector of the present invention is formed as a single integral part by injection molding.

[0158] Preferably, the connector is formed from a single type of plastic material.

[0159] The clamping arm and / or connector are preferably formed of a plastic material having a Shore hardness D between D60 and D90, preferably between D70 or D75 and D85. For example, the clamping arm and / or connector can be formed of rigid PVC, for example, having a Shore hardness D of D77.

[0160] The use of hard plastic materials improved the rigidity of the connector, and thus improved the connection with the pump.

[0161] The pump hose receiving section and the connecting hose receiving section are each formed from a tubular section, and the corresponding ends of the hoses are inserted into the tubular sections. In addition, the inner diameters of the connecting passages 13 and 23 are selected such that the inner surfaces of the corresponding hoses form a continuous surface with the inner surfaces of the connecting passages 13 and 23.

[0162] The tubing assembly, including a connector, pump hose section, and connecting hose section, can be a medical tubing assembly. Specifically, the tubing assembly can be an extracorporeal tubing assembly. In an embodiment, it can be a blood tubing assembly including a dialyzer or a connector for connecting the tubing assembly to the dialyzer. Specifically, the connector for the dialyzer can be located on the outlet connecting hose section. The pump can also be used to pump dialysate.

[0163] The peristaltic pump of the present invention can be, for example, part of a medical device, such as a dialysis machine.

[0164] The pump and / or medical device may include a controller configured to control the pump to rotate in a first rotational direction during a treatment operation so as to move fluid from the inlet side 16 of the pump hose section to the outlet side 26 of the pump bed hose.

[0165] Dialysis machines can specifically be hemodialysis machines or machines used for continuous renal replacement therapy (CRRT).

[0166] In addition, the dialysis machine may be equipped with two or more peristaltic pumps, one for pumping blood and the other for pumping dialysate or other medical fluids, each of which is equipped with a connector and pump hose section as described above.

Claims

1. A connector for connecting a pump hose section to a pump bed of a peristaltic pump. in, The connector includes a first fluid path and a second fluid path associated with an end of the pump hose section, the first fluid path and the second fluid path intersecting in the connector. The connector is configured to be clamped to the opening of the pump bed by two clamping elements arranged on opposite sides of the connector. Its features are, At least one of the clamping elements is formed by a clamping arm having a first free end and a second connecting end connected to the body of the connector.

2. The connector according to claim 1, wherein, The connector has a first pump hose receiving section and a second pump hose receiving section associated with the first fluid path and the second fluid path for receiving a first end and a second end of the pump hose section, respectively, wherein, preferably, the connecting end of the clamping arm is connected to one of the pump hose receiving sections of the connector.

3. The connector according to any one of the preceding claims, wherein, The two clamping elements are formed by clamping arms having a first free end and a second connecting end connected to the body of the connector, wherein, preferably, the connecting ends of the two clamping arms are respectively connected to one of the pump hose receiving sections of the connector.

4. The connector according to any one of the preceding claims, wherein, The first clamping element has a rounded shape and the second clamping element has an angled shape, and / or wherein one of the clamping elements, preferably the first clamping element with a rounded shape, is provided with a connecting element for connection to the pop-out pin and / or sensor of the peristaltic pump.

5. A connector for connecting a pump hose section to a pump bed of a peristaltic pump. in, The connector includes a first fluid path and a second fluid path associated with a first end and a second end of the pump hose section, respectively. The first fluid path and the second fluid path intersect in the connector, wherein the first fluid path forms an inlet fluid path and the second fluid path forms an outlet fluid path. The connector has a bottom side configured to face the bottom of the pump bed. The connector has a first pump hose receiving section and a second pump hose receiving section associated with the first fluid path and the second fluid path for receiving the first end and the second end of the pump hose section, respectively. The connector has a first connecting hose receiving section and a second connecting hose receiving section associated with the first fluid path and the second fluid path, respectively for receiving an inlet connecting hose section and an outlet connecting hose section. Its features are, The second fluid path intersects the first fluid path on the bottom side of the connector, and the second pump hose receiving section is positioned closer to the bottom side of the connector than the first pump hose receiving section.

6. The connector according to claim 5, wherein, The connector is configured to clamp to the opening of the pump bed by two clamping elements arranged on opposite sides of the connector, wherein a first clamping element is arranged on the side of the first pump hose receiving section and a second clamping element is arranged on the side of the second pump hose receiving section, wherein preferably, the first clamping element has a rounded shape and / or the second clamping element has an angled shape, and / or wherein the connector includes a connecting element for connection with the ejector and / or sensor of the peristaltic pump, wherein the connecting element is preferably arranged on one side of the first pump hose receiving section and more preferably arranged in a first quadrant of the connector extending between the first pump hose receiving section and the second connecting hose receiving section.

7. The connector according to any one of the preceding claims, wherein, The connector body is formed by two tubular fluid path elements, including a first fluid path and a second fluid path, which are connected to each other at the points where they intersect. Each of the tubular fluid path elements includes a pump hose receiving section at one end and a connecting hose receiving section at the opposite end. Preferably, the fluid path elements are connected to each other only at the points where they intersect, and / or preferably, at least one and preferably two connecting hose receiving sections and / or at least one and preferably two pump hose receiving sections are each formed from the free ends of the fluid path elements.

8. The connector according to any one of the preceding claims, comprising a third fluid path connected to the first fluid path or the second fluid path and a third connecting hose receiving section associated with the third fluid path, the third connecting hose receiving section being used to connect a third connecting hose to the first fluid path or the second fluid path via the third fluid path.

9. The connector according to claim 8, wherein, The third fluid path is provided by a third tubular fluid path element, which is connected to the first or second tubular fluid path element, and preferably includes the third connecting hose receiving section at its free end. The third tubular fluid path element preferably extends parallel to the second or first tubular fluid path element, and preferably has a certain distance between it and the second or first tubular fluid path element.

10. The connector according to any one of the preceding claims, wherein, The connector is formed into a single integral part by injection molding.

11. The connector according to any one of the preceding claims, wherein, The clamping arm and / or the connector are formed of a plastic material having a Shore hardness D of at least D60, preferably at least D70, more preferably at least D75 and / or a Shore hardness D of at most D90, preferably at most D85, and / or wherein the clamping arm and / or the connector are formed of PVC, particularly rigid PVC.

12. A tubing assembly comprising a connector according to any one of the preceding claims, a pump hose section, and two connecting hose sections connected to the connector, wherein, The tubing assembly is preferably a blood tubing assembly, which includes a connector for connecting to a dialyzer disposed on one of the connecting tubing sections, preferably the outlet connecting tubing section.

13. A peristaltic pump, comprising: Stator, wherein the pump bed is formed in the stator; A pump hose section, wherein the pump hose section is inserted into the pump bed in an arc shape; Rotor, the rotor being used to act on the pump hose section; and The connector according to any one of the preceding claims.

14. A peristaltic pump, comprising: Stator, wherein the pump bed is formed in the stator; A pump hose section, wherein the pump hose section is inserted into the pump bed in an arc shape; Rotor, the rotor being used to act on the pump hose section; and A connector for connecting the pump hose section to the pump bed, wherein the connector includes a first fluid path and a second fluid path associated with a first end and a second end of the pump hose section, respectively, wherein the first fluid path forms an inlet fluid path and the second fluid path forms an outlet fluid path, the first fluid path and the second fluid path intersect in the connector, and the connector has a bottom side facing the bottom of the pump bed. The connector has a first pump hose receiving section and a second pump hose receiving section associated with the first fluid path and the second fluid path for receiving the first end and the second end of the pump hose section, respectively. The peristaltic pump includes a main pump operating mode in which the rotor rotates in a first direction to move along the pump hose section in a direction from the first end to the second end of the pump hose section. Its features are, The second fluid path intersects the first fluid path on the bottom side of the connector, and the second pump hose receiving section is positioned closer to the bottom side of the connector than the first pump hose receiving section.

15. A medical device, particularly a dialysis machine, comprising a pump according to any one of claims 13 or 14.

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