METHOD FOR CONNECTING SUCTION HOSES FOR BODY FLUIDS TO A CONTAINER AND QUICK HOSE CONNECTORS FOR SUCTION HOSES FOR BODY FLUIDS

Description

[0001] The invention relates to a method for connecting suction hoses for body fluids to a container, and to a hose quick connector for suction hoses for body fluids.

[0002] While establishing a leak-tight connection is always an important requirement when transporting fluids through pipes and tubes into a container, special challenges arise when managing aspirated body fluids. Firstly, the requirements for leak-tightness tend to be more stringent, as these fluids are regularly problematic from a hygiene perspective, and secondly, the effectiveness of the aspiration must not be reduced by leaks. Secondly, establishing the connection must be simple, quick, and reliable so that it can either be carried out by the patient themselves, who is often elderly or frail, or, if carried out by nursing staff, without placing an additional burden on the limited time available per patient.

[0003] The connections used to date for such purposes do not adequately meet these requirements. In many cases, simple hose connector systems are used with a hose nozzle that is plugged onto a conical connecting element. If too little and / or imprecise force is applied when making the connection, the connection will be too loose or crooked, which may mean that the seal is no longer sufficiently guaranteed and this could lead to fluid leaking into the environment or contamination and germs entering the body fluid suction system. If, on the other hand, the connection is made with great force in an effort to avoid precisely this, there is a risk that it can only be released again with at least the same amount of force.

[0004] Luer-Lock systems are also known for producing such connections. These systems provide a sealing effect through the conical design of the connecting parts, and the connection is secured by screwing them into a thread. However, problems often arise when loosening overtightened connections; moreover, the seal is only sufficiently high with sufficiently precise manufacturing.

[0005] EP 0 633 039 A1 discloses a method having the features of the preamble of claim 1, as well as a suction hose and a quick-connect hose connector. Further prior art includes US 2 525 879 A and DE 10 2008 046 098 A.

[0006] The object of the invention is to provide a method for connecting a suction hose for body fluids to a container, a suction hose for carrying out such a method and a hose quick connector which enable a simpler and at the same time high requirements for the tightness of the connection to be established between the suction hose and the container.

[0007] This object is achieved by a method for connecting a suction hose for body fluids to a container having the features of patent claim 1, and by a hose quick connector having the features of patent claim 5. Advantageous developments of the invention are the subject of the dependent patent claims.

[0008] The method according to the invention for connecting a suction hose for body fluids to a container comprises at least the following steps: Providing a hose section arranged on a hose adapter, a seal with at least one annular sealing surface and a container to which a hose adapter counterpart is attached.

[0009] In the procedure according to this step according to the invention, in particular because the connections between the hose section and the hose adapter on the one hand and the hose adapter counterpart and the container on the other hand are preconfigured by the manufacturer, the risk of leaks caused by operation is reduced to the connection between the hose adapter and the hose adapter counterpart, where it is better controllable by appropriate design of these components than, for example, when a connection is freely produced between an end region of a hose section with a conical connecting element.

[0010] In many cases, the seal can simply be annular; however, there are also possible configurations in which an annular sealing surface formed in this way (which, like an O-ring, can create a seal between two different components, i.e. is not formed solely by the surface with which the seal interacts with a component) is only one of the sections of the seal, for example when the seal additionally has a tubular section with which it is pushed onto the suction hose and connected to it. Establishing mechanical contact between a first contact surface provided on the hose adapter, the seal having at least one annular sealing surface, and a second contact surface provided on the hose adapter counterpart (20) in a first orientation of the hose adapter (10) relative to the hose adapter counterpart (20), and rotating the hose adapter from the first orientation into a second orientation in which interaction between sections of the hose adapter and sections of the hose adapter counterpart results in the seal having at least one annular sealing surface being squeezed between the first contact surface and the second contact surface.

[0011] The latter steps, on the one hand, create a locking connection between the hose adapter and its counterpart, preventing unwanted separation of these two components (since otherwise, no crushing forces could be built up). On the other hand, they occur in a manner that applies a force toward the components and compresses the seal with at least one annular sealing surface, thereby increasing the sealing effect.

[0012] A preferred development of the invention provides that when establishing the mechanical contact, a section of the hose adapter, in which at least part of a through-opening which communicates with the interior of the hose section runs, and on which at least one locking element is arranged, is introduced in the first orientation into an opening passing through the hose adapter counterpart until the locking element and an access to the through-opening on the other side of the hose adapter counterpart emerge from the opening passing through the hose adapter counterpart,wherein, during the insertion of the section of the hose adapter provided with the part of the through-opening communicating with the interior of the hose section, the seal with at least one annular sealing surface is placed on the section of the hose adapter provided with the part of the through-opening communicating with the interior of the hose section and is arranged in the space between a first contact surface provided on the hose adapter and a second contact surface provided on the hose adapter counterpart.

[0013] The procedure according to the step developed in this way avoids the need for a transfer of body fluid between the hose adapter and the hose adapter counterpart, because it can flow directly from the hose adapter, or more precisely from the through-opening communicating with the interior of the hose section, into the container. The direction of suction, which is intended to convey the body fluid into the container, and with the usual orientation of the container access, which is preferably vertical or at least has a vertical component, also the force of gravity, support a direct transfer of body fluid escaping from the section through the hose adapter counterpart into the container and counteract a flow back to the point at which escape into the environment is fundamentally possible because the environment, hose adapter and hose adapter counterpart meet.In addition, with a correspondingly precise design of the opening passing through the tube adapter counterpart and the section of the tube adapter that is to be inserted into it, it can be achieved that the body fluid has to travel a long creepage path before it even reaches the point at which it would in principle be possible to escape into the environment.

[0014] Furthermore, the positioning of the seal with at least one annular sealing surface in this step ensures that after completion of the procedure it is positioned in such a way that it also counteracts the transfer of body fluid into the environment.

[0015] It is particularly preferred if, when the hose adapter is rotated from the first orientation into a second orientation, the locking element is brought into a position in which it presses the hose adapter counterpart in the direction of the hose section, so that the seal is squeezed with at least one annular sealing surface between the first contact surface and the second contact surface.

[0016] It should also be noted that the rotation of the relevant section of the hose adapter can, of course, also be carried out together with the entire hose adapter and will usually be done this way.

[0017] Furthermore, it should not go unmentioned that in this configuration, a high degree of safety is achieved with regard to contamination of the environment with body fluid, even in the case of an imperfect connection, as long as the locking function is fulfilled, because if the seal does not close completely tightly, ambient air is sucked in as a result of the suction, so that a fluid flow is created that counteracts the creep of body fluid towards the opening.

[0018] According to the invention, in order to provide the hose section arranged on the hose adapter, an end section of the hose section, the inner cross section of which corresponds to the cross section of the through-opening, is inserted into a recess which adjoins the through-opening on the hose side and is concentric with the through-opening, the extent of which is adapted to the outer cross section of the hose, until the end face of the end section of the hose section rests on a step and the outer wall of the end section of the hose section rests on the wall of the recess and at least either the end face of the end section of the hose section or the outer wall of the end section of the hose section is fixed.

[0019] This procedure, which preferably involves the manufacturer providing the hose section equipped with the hose adapter, can greatly minimize the risk of aspirated body fluid escaping into the environment. The annular casing formed by the wall of the recess protects the end of the hose section inserted into the recess from external mechanical influences, while simultaneously preventing the immediate escape of aspirated body fluid into the environment. If the hose section is secured, this can be achieved, in particular, by bonding it with an adhesive or—preferably hardening—sealing material; the tightness of this connection is virtually guaranteed.According to the invention, when the section of the hose adapter provided with the through-opening communicating with the interior of the hose is rotated from the first orientation into a second orientation, the locking element is guided at least during parts of the rotation along a third contact surface, the distance of which from the second contact surface increases from the position of the locking element, starting from the first orientation, to the position of the locking element in the second orientation.

[0020] As a consequence, during the parts of the rotation during which this feature is fulfilled, the distance between the first contact surface, i.e. the contact surface located on the hose adapter and facing the hose adapter counterpart, and the second contact surface, i.e. the contact surface located on the hose adapter counterpart and facing the hose section, is reduced and the position of the seal is defined with at least one annular sealing surface until it is squeezed between the first and second contact surface.

[0021] A particularly preferred development of the method is also one in which, upon rotation of the section of the hose adapter provided with the through-opening communicating with the interior of the hose from the first orientation to a second orientation, the locking element, before reaching the second orientation, passes through a position in which the seal with at least one annular sealing surface is more tightly compressed than in the second orientation. This position is particularly preferably passed through immediately before reaching the second orientation. This measure has the effect of fixing the hose adapter in the second position.

[0022] The section of the seal having the annular sealing surface, which should particularly preferably be elastic overall, preferably at least in this section, in order to utilize this effect as well as possible, then fulfills, in addition to the sealing function, also a function as a spring, comparable to the function of the disc springs which are used in known quarter-turn quick-release fasteners for connecting components to one another.

[0023] A suction hose for carrying out the method, which is not part of the claimed invention, is equipped with a hose section and with a hose adapter arranged at an end section of the hose section. The hose adapter has at least one locking element or at least one groove designed such that when the hose adapter rotates from a first orientation to a second orientation, a seal with at least one annular sealing surface is squeezed between a first contact surface present on the hose adapter and a second contact surface arranged on the hose adapter counterpart due to an interaction between the locking element or the groove of the hose adapter on the one hand and a groove or a locking element of the hose adapter counterpart on the other.

[0024] An embodiment of the suction hose for carrying out such a method, which is not part of the claimed invention, has a hose section and a hose adapter which is arranged at an end section of the hose section, wherein the hose adapter has a section provided with a through-opening communicating with the interior of the hose section for passing through an opening of a hose adapter counterpart, on which at least one locking element is arranged.

[0025] This section ensures that the through-opening of the hose adapter is located within a container to which the hose adapter counterpart is attached, which significantly impedes the leakage of body fluid into the environment and simplifies the requirements for establishing the connection between the hose adapter and the hose adapter counterpart.

[0026] In a further development of such a suction hose, which is not part of the claimed invention, it is provided that the inner cross section of the end section of the hose section corresponds to the cross section of the through-opening and that the end section of the hose section is arranged in a recess which adjoins the through-opening on the hose side and is concentric with the through-opening, the extent of which recess is adapted to the outer cross section of the end section of the hose section, so that the end face of the end section of the hose section rests on a step and the outer wall of the end section of the hose section rests on the wall of the recess and at least either the end face of the end section of the hose section or the outer wall of the end section of the hose section is fixed.

[0027] The wall of the recess protects the end section of the hose section from mechanical impact and, thanks to its design, ensures flat contact between the end of the hose section and the hose adapter, which significantly reduces the risk of leaks.

[0028] If the hose section is fixed, which is preferably done with a material bond, in particular with an adhesive or - preferably hardening - sealing material, the tightness of this connection is virtually guaranteed.

[0029] According to another development of the suction hose not belonging to the claimed invention, auxiliary elements are provided on the hose adapter to support the introduction of force when bringing about a rotational movement of the hose adapter about an axis defined by the through-opening, which auxiliary elements can be realized as projections, protuberances or indentations in this annular jacket, in particular when an annular jacket is present.

[0030] In this way, even older people who are no longer able to exert a high level of grip strength can find it noticeably easier to create a tight and reliable connection.

[0031] The hose quick connector according to the invention comprises a hose adapter, a seal with at least one annular sealing surface and a hose adapter counterpart which is penetrated by an opening for receiving a portion of the hose adapter in at least one orientation of the hose adapter.

[0032] The hose adapter has a hose connection for connection to a hose section on its side intended to face the hose and a first contact surface for the seal with at least one annular sealing surface on the side intended to face the hose adapter counterpart.

[0033] Furthermore, the hose adapter counterpart has a second contact surface for the seal with at least one annular sealing surface on its side intended to face the hose adapter, and the hose adapter and hose adapter counterpart each have means which interact with one another in such a way that by rotating the hose adapter relative to the hose adapter counterpart from a first orientation to a second orientation, the seal with at least one annular sealing surface is squeezed between the first contact surface and the second contact surface.

[0034] According to a preferred development of the hose quick connector, it is provided that the hose adapter counterpart is penetrated by an opening for receiving a section of the hose adapter in at least one orientation of the hose adapter, that the hose adapter has a through-opening that communicates with the interior of the hose section, and a section for passing through the opening in the hose adapter counterpart for receiving a section of the hose adapter in at least one orientation of the hose adapter, on which section at least one locking element is arranged and in which at least a part of the through-opening that communicates with the interior of the hose section runs.It is further provided that the opening for receiving a section of the hose adapter in at least one orientation of the hose adapter and the section of the hose adapter for passing through the opening for receiving the section of the hose adapter are coordinated with one another in such a way that the locking element can be transferred by rotating the hose adapter from a first orientation in which it can be passed through the opening for receiving a section of the hose adapter into a second orientation in which the locking element presses the hose adapter counterpart in the direction of the hose section.

[0035] This design of the hose quick connector prevents bodily fluid from having to transfer between the hose adapter and its counterpart, as it can flow directly from the hose adapter, or more precisely from the opening communicating with the interior of the hose section, into the container. The direction of suction, which is intended to convey the bodily fluid into the container, and, given the usual orientation of the container access, which is preferably vertical or at least has a vertical component, also the force of gravity, support a direct transfer of bodily fluid escaping from the section through the counterpart hose adapter into the container and counteracts flowing back to the point at which escape into the environment is fundamentally possible, because the environment, hose adapter and counterpart hose adapter meet.

[0036] In addition, with a correspondingly precise design of the opening passing through the tube adapter counterpart and the section of the tube adapter that is to be inserted into it, it can be achieved that the body fluid has to travel a long creepage path before it even reaches the point at which it would in principle be possible to escape into the environment.

[0037] Furthermore, the positioning of the seal with at least one annular sealing surface on this hose quick connector when its components are connected ensures that it also counteracts the transfer of body fluids into the environment.

[0038] In addition, this hose quick connector locks the hose adapter to its counterpart, preventing accidental separation of the two components. At the same time, this locking action occurs in a way that forces the components toward each other and compresses the seal with at least one annular sealing surface, further enhancing the sealing effect.

[0039] In a preferred development of the hose quick connector, it is provided that the inner cross section of the end section of the hose section corresponds to the cross section of the through-opening and that the end section of the hose section is arranged in a recess which adjoins the through-opening on the hose side and is concentric with the through-opening, the extent of which recess is adapted to the outer cross section of the end section of the hose section, so that the end face of the end section of the hose section rests on a step and the outer wall of the end section of the hose section rests on the wall of the recess and at least either the end face of the end section of the hose section or the outer wall of the end section of the hose section is fixed.If the hose section is fixed in a material-to-material manner, in particular by filling the annular gap with an adhesive or - preferably hardening - sealing material, then the tightness of this connection is virtually guaranteed.

[0040] It is also preferred if auxiliary elements are provided on the hose adapter to assist in the introduction of force when inducing a rotational movement of the hose adapter around an axis defined by the through-opening. The auxiliary elements can be implemented as projections, protrusions, or indentations in this annular casing, particularly when an annular casing is present. In this way, establishing a tight and reliable connection can be noticeably easier, even for older people who are no longer able to exert high grip strength.

[0041] In a preferred embodiment of the hose quick connector, the compression of the seal with at least one annular sealing surface is achieved in that a third contact surface is provided on the hose adapter counterpart, the distance of which from the second contact surface increases from the position of the locking element, starting from the first orientation, to the position of the locking element in the second orientation, and in that when the section of the hose adapter provided with the through-opening communicating with the interior of the hose rotates from the first orientation into the second orientation, the locking element is guided at least in sections - i.e. not necessarily during the entire movement - along this third contact surface.

[0042] According to the invention, when the section of the hose adapter provided with the through-opening rotates from the first orientation to a second orientation, the locking element, before reaching the second orientation, passes through a position on such a contact surface in which the seal is more tightly compressed with at least one annular sealing surface than in the second orientation. Particularly preferably, this position is passed through immediately before reaching the second orientation. This measure has the effect of fixing the hose adapter in the second position.The section of the seal having the annular sealing surface, which should particularly preferably be elastic overall, preferably at least in this section, in order to utilize this effect as well as possible, then fulfills, in addition to the sealing function, also a function as a spring, comparable to the function of the disc springs which are used in known quarter-turn quick-release fasteners for connecting components to one another.

[0043] The invention is explained in more detail below with reference to figures showing an exemplary embodiment. It shows: Fig. 1:An exploded view of a hose quick connector, Fig. 2:the hose quick connector from Figure 1 in an open state with the hose adapter section inserted into the hose adapter counterpart, Fig. 3: the hose quick connector from Figure 1 in an intermediate state when closing the hose quick connector, Fig. 4: a cross section through Figure 3along the line BB, Fig. 5: an exploded view of a first variant of the hose quick connector from Figure 1 , Fig. 6: an exploded view of a second variant of the hose quick connector from Figure 1 , Fig. 7: an exploded view of another hose quick connector, Fig. 8: a side view of the hose quick connector from Figure 7 , and Fig. 9: a cross section through Figure 8 along the line BB.

[0044] Where the same exemplary embodiment is depicted in the figures, the same reference numerals are used unless otherwise stated. However, to improve clarity, not all reference numerals are shown in all figures.

[0045] The Figures 1 to 4show different views of a hose quick connector 1, consisting of a hose adapter 10, a hose adapter counterpart 20, and a seal with at least one annular sealing surface 30, which is designed as a sealing ring. The hose adapter 10 and a hose section 3 arranged on it together form a suction hose 2, which, in practical use, is connected to the hose adapter counterpart 20 in order to transfer body fluid suctioned under negative pressure into a container (not shown), on which the hose adapter counterpart 20 is preferably arranged in practice.

[0046] The structure of the hose adapter 10 can best be seen in the exploded view according to Figure 1 with the sectional view according to Figure 4The hose adapter 10 has a section 11 through which a through-opening 12 passes. In its end region, on the side facing away from the hose section 3, it has two locking elements 13, which are designed here as radially outwardly extending pins. At the end of the section 11 facing the hose section 3, the adjacent area of ​​the hose adapter 10 projects beyond the section 11 in the radial direction, forming a first contact surface 17.

[0047] On the hose side, the through-opening 12, whose diameter DD is adapted to the inner diameter DS,inside of the interior 4 of the hose section 3, merges into a recess 14, whose diameter DA is adapted to the outer diameter DS,outside of the hose section 3. Accordingly, a step 15 is provided on which the end face of the walls of the end section of the hose section 3 rests, while the outer side of these walls rests against the inner side of the walls of the recess 14.

[0048] In principle, this alone can provide sufficient sealing against fluid leakage and adequate fixation of the hose; however, these properties can be further improved by creating a material-to-material connection, e.g., by bonding between the step 15 or the walls of the recess 14 and the end face or outer wall of the hose section 3.

[0049] In order to more easily remove the hose adapter 10 by rotation from the position shown in FIG. 1 after inserting the section 11 into the opening 21 passing through the hose adapter counterpart 20, Figure 2 In order to be able to transfer the first orientation shown, in which the section 11 can be inserted into the opening 21, into the second orientation in which it squeezes the seal together with at least one annular sealing surface 30, it has auxiliary elements 16, which are realized here as two mutually opposite projections of the hose adapter 10 extending outwards in the radial direction.

[0050] The opening 21 passing through the hose adapter counterpart 20 has a substantially circular cross-section, but has two mutually opposite recesses 21a, 21b extending in the radial direction beyond the radius of the circle corresponding to the circular cross-section, in order to be able to guide the insertion of the section 11 together with the locking elements 13 arranged on it through the opening 21 in the first orientation.

[0051] The end face of the hose adapter counterpart 20 facing the hose section 3 forms a second contact surface 22, which is in the Figures 3 and 4can be seen particularly well. The end face of the hose adapter counterpart 20 opposite the second contact surface 22 forms a third contact surface 23, along which the locking elements 13 are guided after they have been rotated slightly out of the first orientation, namely until they reach their end position defined by projections 24, each of which forms a stop for a locking element 13.

[0052] It should be emphasized that the second orientation, in which the locking element 13 is in a position in which it presses the hose adapter counterpart 20 in the direction of the hose section 3, so that the seal with at least one annular sealing surface 30 is squeezed between the first contact surface 17 and the second contact surface 22, can, depending on the design of the third contact surface 23, already be located before the stop formed by the projections 24 is reached.

[0053] The contact surfaces 23 are, as in Figure 3 is particularly clearly visible, designed in such a way that on the way of movement of the locking elements 13 of the Figure 3 at the current position of the locking elements 13, the distance d between the second contact surface 22 and the third contact surface, which is entered as an example, increases, so that the hose adapter counterpart 20 is pressed by the locking elements 13 in the direction of the hose section 3 and as a result the seal with at least one annular sealing surface 30 is increasingly squeezed.

[0054] The outer diameter of the hose adapter counterpart 20 can be adapted to the inner diameter of a container opening of a container (not shown) and can have a radially projecting section 25 on the side facing the hose section 3, which projects beyond this inner diameter.

[0055] The Figure 5shows an exploded view of a hose quick connector 101, which is a variant of the hose quick connector 1 and also consists of a hose adapter 110, a hose adapter counterpart 120 and a seal with at least one annular sealing surface 130, which is designed as a sealing ring.

[0056] The design of the hose quick connector 101 differs from the design of the hose quick connector 1 with regard to the manner in which the connection to the hose section (not shown) is established. Accordingly, the description of the quick connector 1 can largely be used in addition to the following description, with the reference numerals in Figure 5 by adding the number hundred to the reference symbol of the Figures 1 to 4 result.

[0057] The hose adapter 110 has a section 111 through which a through-opening 112 passes. In its end region, on the side facing away from the hose section, it has two locking elements 113, which are designed here as radially outwardly extending pins. At the end of the section 111 facing the hose section, the adjacent area of ​​the hose adapter 110 projects beyond the section 111 in the radial direction, forming a first contact surface 117.

[0058] Unlike the embodiment according to Figures 1 to 4 Here, however, only a part of the through-opening 112 is arranged in the section 111; it continues within the hose adapter 110 in the direction of the hose section not shown, where its wall is formed by a plug-on cone 118.

[0059] In the lower area of ​​the push-on cone, facing section 111, auxiliary elements 116 are molded onto the area of ​​the push-on cone 118 above the auxiliary elements 116. The hose section (not shown) is plugged onto the area of ​​the push-on cone 118 above the auxiliary elements 116. This is preferably done by the manufacturer once during production of the connecting hose, creating a material-to-material connection. This enables a very simple and material-saving construction of the hose adapter 110, while at the same time reliably avoiding the usual problems associated with push-on cones, where the user has to plug on the hose themselves to change the container.

[0060] As with the hose quick connector 1, the opening 121 in the hose quick connector 101 passing through the hose adapter counterpart 120 has a substantially circular cross-section which has two mutually opposite recesses 121a, 121b extending in the radial direction beyond the radius of the circle corresponding to the circular cross-section in order to enable the insertion of the section 111 together with the locking elements 113 arranged on it in the first orientation through the opening 121.

[0061] The end face of the hose adapter counterpart 120 facing the hose section (not shown) forms a second contact surface 122. The end face of the hose adapter counterpart 120 opposite the second contact surface 122 forms a third contact surface 123, along which the locking elements 113 are guided after they have been rotated slightly out of the first orientation. Here, too, the contact surfaces 123 are designed such that, as the locking elements move, the distance between the second contact surface 122 and the third contact surface 123 increases, so that the hose adapter counterpart 120 is pressed toward the hose section by the locking elements 113, and as a result, the seal, designed as a circular sealing disc with at least one annular sealing surface 130, is increasingly squeezed.

[0062] The Figure 6shows an exploded view of a hose quick connector 201, which is another variant of the hose quick connector 1 and also consists of a hose adapter 210, a hose adapter counterpart 220 and a seal with at least one annular sealing surface 230, which is designed here as a sealing ring with a modified inner contour, as well as an end region of the suction hose 202, with hose section 203 and hose adapter 210.

[0063] The structure of the hose quick connector 201 differs from the structure of the hose quick connector 1 with regard to the design of the section 211, which is passed through the opening 221 of the hose adapter counterpart 220. Accordingly, the description of the quick connector 1 can largely be used in addition to the following description, wherein the reference numerals in Figure 5 by adding the number two hundred to the reference symbol of the Figures 1 to 4 result.

[0064] The hose adapter 210 has a section 211 whose outer contour is in the shape of a triangle with rounded corners and through which a through-opening 212 passes. A locking element 213 is formed in the end region of the section 211. This locking element projects beyond the section 211 in the radial direction and whose outer contour is a triangle with rounded corners similar to the outer contour of the section 211, but with a larger side length. The inner contour 231 of the seal, with at least one annular sealing surface 230, is shaped such that the locking element 213 can be guided, in a first orientation, through the clear volume defined by the inner contour.

[0065] At the end of section 211 facing hose section 203, the adjacent area of ​​hose adapter 210 projects radially beyond section 211, forming a first contact surface 217. The hose-side design of hose adapter 210, including auxiliary elements 216 and the manner in which the connection to hose section 203 is established, is identical to that of hose adapter 10, which is why reference can be made here to the above, corresponding passages of the description of hose adapter 10.

[0066] The opening 221 passing through the hose adapter counterpart 220 has a cross-section that is adapted to the outer contour of the locking element 213 in order to be able to insert the section 211 together with the locking elements 213 arranged on it through the opening 221 in the first orientation.

[0067] The end face of the hose adapter counterpart 220 facing the hose section 203 forms a second contact surface, not visible here. In this exemplary embodiment, in which the hose adapter counterpart 220 is integrated into a section 226 of the container wall and is flush with it, it transitions.

[0068] The end face of the hose adapter counterpart 220 opposite the second contact surface 222, which is drawn inwards relative to the section 226 of the container wall, forms a third contact surface 223, along which the locking elements 213 are guided after they have been rotated out of the first orientation a little way, namely at most until they reach their end position defined by projections 224, which each form a stop for a locking element 213.

[0069] It should be emphasized that relatively soon after leaving the first orientation, the rounded corners of the locking element 213 begin to form a positive connection with the hose adapter counterpart 220. In particular, pressure can be built up by a correspondingly oriented chamfer, so that the locking element 213 is then in a position in which it presses the hose adapter counterpart 220 towards the hose section 203, so that the seal is squeezed with at least one annular sealing surface 230 between the first contact surface 217 and the second contact surface 222, even before a stop 224 is reached.

[0070] The Figures 7 to 9show an embodiment of a hose quick connector 300 or suction hose 302 which is designed significantly differently compared to the previously discussed hose quick connectors 1, 101, 201. In this case, the hose section 303 has a seal 330 at one end, which in turn has a sleeve-shaped holding section 330a and an annular sealing surface 330b.

[0071] The annular sealing surface 330b is placed with its side facing the hose adapter counterpart 320, which in this example is formed on the outside of a section 326 of the container and has pin-shaped locking elements 327, on the second contact surface 322 formed by the free end face of the hose adapter counterpart 320, which substantially surrounds its opening 321 in a ring shape, so that the opening 321 communicates with the interior 304 of the hose section 303.

[0072] How to be particularly good at presenting the Figure 9recognizes, the squeezing together of the annular sealing surface 330b is achieved in that the hose adapter 310 with auxiliary elements 316, which is threaded onto the hose section 303, has grooves 313, which in a first orientation of the hose adapter 310 allow it to be pushed onto the locking elements 327 and then run obliquely, so that when the hose adapter 310 rotates into a second orientation, the first contact surface 317 formed by a step running around the interior 310 of the hose adapter is pulled in the direction of the second contact surface 322. List of reference symbols

[0073] 1,101,201,301Hose quick connector 2,202,302Suction hose 3,203,303Hose section 4,204,304Interior 10,110,210,310Hose adapter 11,111,211Section 12,112,212,312Through opening 13,113,213,327Locking element 14Recess 15Step 16,116,216,316Auxiliary element 17,117,217,317First contact surface 20,120,220,320Hose adapter counterpart 21,121,221,321Opening 21a,21b,121a,121bRecess 22,122,222,322Second contact surface 23,123,223Third contact surface 24Protrusion 25Protruding section 30,130,230,330Seal with at least one annular sealing surface 118Slip-on cone 226,326Section 231Inner contour 313Groove 330aRetaining section 330Annular sealing surface dDistance D a Diameter D s, outside Outside diameter D s, inside Inside diameter

Claims

1. Method for connecting a suction hose (2, 202, 302) for bodily fluids to a container, said method having the steps of - providing a hose adapter (10, 110, 210, 310) arranged on a hose portion (3, 203, 303), a seal having at least one annular sealing surface (30, 130, 230, 330), and a container on which a hose adapter mating part (20, 120, 220, 320) is arranged, - establishing mechanical contact between a first contact surface (17, 117, 217, 317) provided on the hose adapter (10, 110, 210, 310), the seal comprising at least one annular sealing surface (30, 130, 230, 330), and a second contact surface (22, 122, 222, 322) provided on the hose adapter mating part (20, 120, 220, 320), in a first orientation of the hose adapter (10, 110, 210, 310) relative to the hose adapter mating part (20, 120, 220, 320), and - rotating the hose adapter (10, 110, 210, 310) from the first orientation into a second orientation in which by interaction between portions of the hose adapter (10, 110, 210, 310) and portions of the hose adapter mating part (20, 120, 220, 320), such that the seal comprising the at least one annular sealing surface (30, 130, 230, 330) is squeezed between the first contact surface (17, 117, 217, 317) and the second contact surface (22, 122, 222, 322), characterised in that for providing the hose portion (3, 203, 303) arranged on the hose adapter (10, 110, 210, 310) an end portion of the hose portion (3, 203, 303), the inner cross-section of which corresponds to the cross-section of the through-opening (12, 122, 212, 312), is pushed into a recess (14) which adjoins the through-opening (12, 112, 212, 312) on the hose side and which is concentric with the through-opening (12, 112, 212, 312) and the extension of which is matched to the outer cross-section of the hose portion (3, 203, 303), until the end face of the end portion of the hose portion (3, 203, 303) rests on a step (15) and the outside wall of the end portion of the hose portion (3, 203, 303) rests on the wall of the recess (14), and at least either the end face of the end portion of the hose portion (3, 203, 303) or the outside wall of the end portion of the hose portion (3, 203, 303) is fixed, and in that upon rotation of the portion (11, 111, 211) of the hose adapter (10, 110, 210, 310) provided with the part of the through-opening (12, 112, 212, 312) communicating with the interior (4, 204, 304) of the hose portion (3, 203, 303) out of a first orientation into a first orientation the locking element (13, 113, 213, 327) is guided along a third contact surface (23, 123, 223) at least during parts of the rotation, the spacing (d) of which contact surface from the second contact surface (22, 122, 222, 322) from the position of the locking element (13, 113, 213, 327) in the first orientation increases towards the position of the locking element (13, 113, 213, 327) in the second orientation.

2. Method according to claim 1, characterised in that when establishing the mechanical contact, a portion of the hose adapter (10, 110, 210, 310) in which at least a part of a through-opening (12, 112, 212, 312) communicating with the interior (4, 204, 304) of the hose portion (3, 203, 303) extends and on which at least one locking element (13, 113, 213, 327) is arranged is inserted, in the first orientation, into an opening (21, 121, 221, 321) that passes through the hose adapter mating part (20, 120, 220, 320) until the locking element (13, 113, 213, 327) and access to the through-opening (12, 112, 212, 312) on the other side of the hose adapter mating part (20, 120, 220, 320) emerge from the opening (21, 121, 221, 321) passing through the hose adapter mating part (20, 120, 220, 320), wherein during the insertion of the portion (11, 111, 211) of the hose adapter (10, 110, 210, 310) provided with the part of the through-opening (12, 112, 212, 312) communicating with the interior (4, 204, 304) of the hose portion (3, 203, 303) the seal comprising the at least one annular sealing surface (30, 130, 230, 330) is plugged onto the portion (11, 111, 211) of the hose adapter (10, 110, 210, 310) provided with part of the through-opening (12, 112, 212, 312) communicating with the interior (4, 204, 304) of the hose portion (3, 203, 303) and is arranged in the spatial region between a first contact surface (17, 117, 217, 317) provided on the hose adapter (10, 110, 210, 310) and a second contact surface (22, 122, 222, 322) provided on the hose adapter mating part (20, 120, 220, 320).

3. Method according to claim 2, characterised in that upon rotation of the hose adapter (10, 110, 210, 310) from the first orientation into a second orientation, the locking element (13, 113, 213, 327) is brought into a position in which it presses the hose adapter mating part (20, 120, 220, 320) in the direction towards the hose portion (3, 203, 303), such that the seal comprising at least one annular sealing surface (30, 130, 230, 330) is squeezed between the first contact surface (17, 117, 217, 317) and the second contact surface (22, 122, 222, 322).

4. Method according to any of claims 1 to 3, characterised in that upon rotation of the portion (11, 111, 211) of the hose adapter (10, 110, 210, 310) provided with the part of the through-opening (12, 112, 212, 312) communicating with the interior (4, 204, 304) of the hose portion (3, 203, 303) from the first orientation into a second orientation, the locking element (13, 113, 213, 313) passes through a position, before reaching the second orientation, in which the seal comprising at least one annular sealing surface (30, 130, 230, 330) is squeezed together more significantly than in the second orientation.

5. Hose quick connector (1, 101, 201, 301) comprising a hose adapter (10, 110, 210, 310) comprising a seal having at least one annular sealing surface (30, 130, 230, 330), and comprising a hose adapter mating part (20, 120, 220, 320), wherein the hose adapter (10, 110, 210, 310) comprises a hose fitting, on the side thereof intended to face the hose, for connection to a hose portion (3, 203, 303), and comprises a first contact surface (17, 117, 217, 317), on the side thereof intended to face the hose adapter mating part (20, 120, 220, 320), for the seal comprising at least one annular sealing surface (30, 130, 230, 330), wherein the hose adapter mating part (20, 120, 220, 320) comprises a second contact surface (22, 122, 222, 322) for the seal comprising at least one annular sealing surface (30, 130, 230, 330) on the side thereof intended to face the hose adapter (10, 110, 210, 310), and wherein the hose adapter (10, 110, 210, 310) and hose adapter mating part (20, 120, 220, 320) each comprise means that interact with one another in such a way that the seal comprising at least one annular sealing surface (30, 130, 230, 330) is squeezed between the first contact surface (17, 117, 217, 317) and the second contact surface (22, 122, 222, 322) by rotation of the hose adapter (10, 110, 210, 310) relative to the hose adapter mating part (20, 120, 220, 320) from a first orientation to a second orientation, characterised in that a third contact surface (23, 123, 223) is provided on the hose adapter mating part (20, 120, 220, 320), the spacing (d) of which contact surface from the second contact surface (22, 122, 222, 322) increases at least in portions from the position of the locking element (13, 113, 213, 327) proceeding from the first orientation towards the position of the locking element (13, 113, 213, 327) in the second orientation, and in that upon rotation of the portion (11, 111, 211, 311) of the hose adapter (10, 110, 210, 310) provided with the through-opening (12, 112, 212, 312) communicating with the interior of the hose portion (3, 203, 303) from the first orientation into the second orientation the locking element (13, 113, 213, 313) is guided along said third contact surface (23, 123, 223) at least in portions.

6. Hose quick connector (1, 101, 201, 301) according to claim 5, characterised in that the hose adapter mating part is penetrated by an opening (21, 121, 221, 321) for receiving a portion of the hose adapter (10, 110, 210, 310) in at least one orientation of the hose adapter (10, 110, 210, 310), in that the hose adapter comprises a through-opening (12, 112, 212, 312) which communicates with the interior (4, 204, 304) of the hose portion (3, 203, 303), and a portion (11, 11, 211) for guiding through the opening (21, 121, 221) in the hose adapter mating part (20, 120, 220, 320) for receiving a portion (11, 111, 211) of the hose adapter (10, 110, 210, 310) in at least one orientation of the hose adapter (10, 110, 210, 310), on which at least one locking element (13, 113, 213, 327) is arranged and in which at least a part of the through-opening (12, 112, 212, 312), which communicates with the interior (4, 204, 304) of the hoses portion (3, 203, 303), extends, and in that the opening (21, 121, 221, 321) for receiving a portion (11, 111, 211) of the hose adapter (10, 110, 210, 310) in at least one orientation of the hose adapter (10, 110, 210, 310), and the portion (11, 111, 211) of the hose adapter (10, 110, 210, 310) for guiding through the opening (21, 121, 221, 321) for receiving the portion (11, 111, 211) of the hose adapter (10, 110, 210, 310), are matched to one another in such a way that the locking element (13, 113, 213, 327) can be transferred, by rotation of the hose adapter (10, 110, 210, 310), from a first orientation in which it can be guided through the opening (21, 121, 221, 321) for receiving a portion of the hose adapter (10, 110, 210, 310), into a second orientation in which the locking element (13, 113, 213, 327) pushes the hose adapter mating part (20, 120, 220, 320) in the direction towards the hose portion (3, 203, 303).

7. Hose quick connector (1, 101, 201, 301) according to claim 6, characterised in that the inner cross-section of the end portion of the hose portion (3, 203, 303) corresponds to the cross-section of the through-opening (12, 112, 212, 312), and in that the end portion of the hose portion (3, 203, 303) is arranged in a recess (14) that adjoins the through-opening (12, 112, 212, 312) on the hose side and is concentric with the through-opening (12, 112, 212, 312) and the extension of which is matched to the outer cross-section of the end portion of the hose portion (3, 203, 303), such that the end face of the end portion of the hose portion (3, 203, 303) rests on a step (15) and the outside wall of the end portion of the hose portion (3, 203, 303) rests on the wall of the recess (14), and at least either the end face of the end portion of the hose portion (3, 203, 303) or the outside wall of the end portion of the hose portion (3, 203, 303) is fixed.

8. Hose quick connector (1, 101, 201, 301) according to claim 7, characterised in that the end face of the end portion of the hose portion (3, 203, 303) and / or the outside wall of the end portion of the hose portion (3, 203, 303) is fixed to the hose adapter (10, 110, 210, 310) by an integral connection.

9. Hose quick connector (1, 101, 201, 301) according to any of claims 6 to 8, characterised in that auxiliary elements (16, 116, 216, 316) for assisting the force introduction when performing the rotational movement of the hose adapter (10, 110, 210, 310) about an axis defined by the through-opening (12, 112, 212, 312) are provided.