DEVICE WITH A CONTAINER AND A SUCTION BAG FOR A SUCTION DEVICE AND ASSEMBLY METHOD

Description

[0001] The invention relates to a device comprising a container and a single-use suction bag for a suction device intended for medical or industrial applications, and a method for mounting the suction bag in the container.

[0002] Suction devices are used in numerous areas of industry and medicine. In dentistry, suction devices are used to create a vacuum at a suction cannula or suction line, through which liquid and solid particles, especially enamel particles, are suctioned from a patient's mouth.

[0003] A suction device of this type is known, for example, from EP3172439B1. This suction device comprises a pump system which is connected to a suction line via a connecting line and a media separation device comprising a container. The connecting line and the suction line are connected to the cover of the container in which the aspirated liquid is separated from the air and stored. The air is then conveyed via the connecting line to the suction device.

[0004] The container includes an overflow protection device that prevents the liquid from reaching the suction line as the level rises. Once the liquid level reaches the maximum permissible value, the suction line inside the container is sealed.

[0005] Once the container is full, the cap or cover is removed and the liquid is disposed of. The container is then cleaned thoroughly, taking care to ensure that medical personnel do not come into contact with the liquid.

[0006] Preferably, a suction bag is provided in the container, which is filled with the aspirated liquid, then sealed and disposed of. Preferably, foldable or flexible suction bags are used, which can be stored in large numbers with minimal space requirements. The dimensions of the unfolded suction bag, which is made of a plastic film, correspond at least approximately to the dimensions of the container.

[0007] WO200793670A1 discloses a container with a suction bag for a suction device intended for medical use. The container is lockable with a cover to which the suction bag is attached. A disadvantage of such devices is noted: when the cover is attached to the container, the suction bag can become trapped between the upper edge of the container and the cover, potentially preventing the suction bag from unfolding properly and the cover from sealing tightly. Furthermore, it is pointed out that incorrect assembly of the suction bag can easily occur, particularly in medical emergencies. To prevent this problem, fastening devices are provided that hold the suction bag in a folded state until it is inserted into the container.However, after inserting the suction bag, it must be ensured that the fastening device no longer hinders the unfolding of the suction bag.

[0008] Typically, the suction bag is permanently attached to the cover and disposed of together, resulting in high material consumption and high manufacturing costs for the suction bag. Furthermore, disposal of the suction bags is costly, as the bulky plastic cover must also be disposed of.

[0009] However, if the user connects the suction bag to the cover, this requires skill. The suction bag must be precisely fitted to a retaining element of the cover and, if necessary, mounted using a mounting device such as an elastic ring.

[0010] If the filled suction bag is not disposed of together with the cover, it must be carefully detached from the cover after filling to prevent any liquid from escaping. There is a risk that the filled suction bag may detach from the cover on its own and the liquid could be released.

[0011] The suction bag with the additional fastening device is therefore relatively complex in design and can only be assembled and disassembled with skill.

[0012] It should be noted that when assembling these well-known suction bags, the cover is pressed onto the container manually or by suction pressure, which is why a completely airtight connection between the container and the cover is not usually achieved.

[0013] WO200793670A1 further discloses that a vacuum is created in the space between the container and the suction bag so that the suction bag can unfold and be contracted by the vacuum prevailing inside the suction bag.

[0014] US 3845765A discloses further devices for a suction device comprising a container in which a suction bag is arranged and which can be closed with a cover. In a first embodiment of the device, the edge of the suction bag is guided outwards between the upper edge of the container and the cover via a sealing ring, which is associated with several disadvantages. If the edge of the suction bag is folded over the sealing ring, which can easily happen during insertion, gaps or microchannels are created through which suctioned liquid can escape. Therefore, care must be taken during assembly of the suction bag to ensure that no overlaps occur above the sealing ring. Handling the suction bag after it has filled is also particularly disadvantageous.When the cover is removed, the edge of the filled suction bag is no longer held in place. As a result, the weight of the aspirated fluid pulls the bag back into the container, and aspirated fluid can leak over the edge of the bag into the container or outwards. Furthermore, the appearance of the device, with the suction bag's edge protruding outwards, is disadvantageous, creating an unattractive aesthetic impression that medical personnel would prefer not to come into contact with.

[0015] In a further embodiment of the device described in US 3845765A, it is proposed to attach the suction bag to a frame that is placed inside the device's container after the suction bag has been mounted. The edge of the suction bag is guided between a first ring and a second ring of the frame. By guiding the second ring against the first ring, the edge of the bag is clamped and fixed in place. With this embodiment, the suction bag, including its edge, can be positioned completely inside the container. To remove the filled suction bag, the cover is removed from the container, and the frame is grasped by a handle and lifted out of the container. Subsequently, the two rings are separated, and the suction bag is removed. This embodiment of the device has numerous disadvantages.A frame with two clamping rings is required, which involves manufacturing effort and corresponding costs. The suction bag must be skillfully attached to this frame by threading the bag's edge between the two rings and securing it. Handling is particularly difficult after the bag is filled, as the weight of the collected liquid can easily cause the bag to slip out when the two clamping rings are released, potentially spilling some of the liquid. Furthermore, the frame requires considerable maintenance, as it must be cleaned after each use. If the frame includes delicate components, there is also a risk of deformation, necessitating corrective action. Finally, the frame takes up space within the container.

[0016] US 5914047A discloses another device for a suction device, comprising a container in which a suction bag is arranged. In this device, the container has a neck through which the opening of the suction bag is passed and folded outwards over the neck. The neck can be covered by a protective cover, which also secures the suction bag. However, the protective cover does not create a tight seal around the suction bag, so measures must be taken to prevent the extracted liquid from escaping. This device therefore requires a specific design that can only be implemented with considerable effort.

[0017] US 5118003A discloses another device for a suction device, comprising a container in which a suction bag is arranged and which can be closed with a cover. The cover, the suction bag, and a mounting ring together form a disposable unit that is discarded after use or after the suction bag is full. The mounting ring, which is placed on the rim of the container, and the cover have corresponding teeth between which the rim of the suction bag is guided outwards before the teeth are pressed together to form the disposable unit. A pressing device is provided for this pressing process, i.e., for completing the disposable unit. This device first fixes the rim of the suction bag before the teeth of the cover and the mounting ring are pressed together. This device also has numerous disadvantages.The cover, mounting ring, and bag, which together form a disposable unit, must be discarded after use, resulting in a large amount of costly consumables that must be provided and disposed of. Manufacturing the disposable unit requires a tool, which incurs costs and takes up space. The edge of the suction bag also protrudes outwards in this device, resulting in the same technical and aesthetic disadvantages described above with reference to US5914047A.

[0018] US3704709A discloses a suction bag that can be sealed after use.

[0019] The present invention therefore aims to provide an improved device comprising a container and a disposable suction bag for a suction device, suitable for medical and industrial applications. Furthermore, an improved assembly method is to be provided, by means of which the suction bag can be advantageously mounted in the container of the device.

[0020] The suction bag should be of a simple design and easily mountable in the container using the assembly method, and removable again after filling with drained liquid.

[0021] In particular, it should not be necessary to skillfully assemble and disassemble the suction bag to prevent leaks after assembly and the potential for the bag to detach itself during disassembly, releasing the extracted liquid. Incorrect handling during assembly and disassembly of the suction bag should thus be reliably prevented.

[0022] The device should be simple in design. An auxiliary device, such as a frame that needs to be connected to the suction bag and inserted into the container, should be avoided.

[0023] Furthermore, it should be avoided that part of the suction bag is led to the outside of the container and appears disruptive.

[0024] Apart from the suction bag, no other consumable or disposable material should need to be provided and disposed of for the operation of the device.

[0025] Furthermore, tools or devices used to connect the suction bag to the cover and / or a mounting ring, for example, should be avoided.

[0026] The need for special mounting devices that hold the suction bag folded before installation and that must be released before filling the bag should be eliminated. This should also prevent the suction bag from having to be partially folded before installation and thus avoid the extra space it takes up.

[0027] Furthermore, it should be possible to avoid creating a vacuum inside the container between the suction bag and the container wall.

[0028] The device according to the invention should function flawlessly even at high suction capacities of, for example, 100 l / min to 300 l / min. In particular, it should not be necessary to create a vacuum between the suction bag and the container, even at high suction capacities.

[0029] This problem is solved by a device comprising a container and a suction bag according to claim 1, a suction bag according to claim 10, and an assembly method according to claim 11. Advantageous embodiments of the invention are specified in further claims.

[0030] The device, which is intended for a suction device in the field of medical or industrial applications, comprises a container, preferably made of plastic, having a container wall with an inner and an outer surface enclosing a container space, to which a container base is attached at the bottom and a container opening at the top, a cover for closing the container opening, a mounting ring, and a single-use suction bag having a bag opening at one end and being held and enclosed within the container space by the mounting ring and divided into a lower part closed on one side and an upper part with the bag opening, the upper part being folded back over the mounting ring and part of the lower part, so that the mounting ring defines a receiving opening for the suction bag.

[0031] According to the invention, at least one support element is formed on the inside of the container wall, on which the mounting ring is supported in such a way that the upper part of the suction bag runs against the bottom of the container within the container space between the mounting ring and the container wall.

[0032] This eliminates the need for components such as a frame that connect to the suction bag and are inserted into the container along with the assembled bag. The device can be manufactured cost-effectively without the frame. The space inside the container can be used optimally.

[0033] The suction bag is securely held by the mounting ring, so the cover can be easily removed after the suction bag has been filled.

[0034] The edge of the suction bag does not protrude to the outside of the container, but is guided back inside the container against the bottom of the container.

[0035] The suction bag can be easily installed without the need for tools or equipment.

[0036] According to the inventive method for mounting the suction bag in the device, it is provided that that in a first assembly step the mounting ring is guided over the suction bag so that the mounting ring encloses the suction bag and divides it into the lower part, which is closed on one side, and the upper part, which has the bag opening; that in a second assembly step the upper part is folded radially outwards over the mounting ring and part of the lower part so that the mounting ring defines a receiving opening for the suction bag; that in a third assembly step the suction bag is inserted into the container space of the opened container and the mounting ring is supported on the at least one support element; and that in a fourth assembly step the cover or a connecting ring connected to the cover is placed on the container.

[0037] If a pull cord is provided adjacent to the bag opening, allowing the suction bag to be closed, the pull cord can be easily tightened in an optional intermediate step after the second assembly step. This optional intermediate step further encloses and secures the mounting ring against the bag's edge. A lockable suction bag, in conjunction with the device according to the invention, therefore offers particular advantages not only with regard to disposal but also with regard to assembly.

[0038] If this has not already been done, the device is connected to the suction device via a connecting cable attached to the cover, and the suction device is then activated. Liquid can subsequently be transferred into the suction bag via a suction line connected to the cover, with the aspirated air and liquid being separated within the container. The aspirated air is then routed to the suction device via the connecting cable, while the liquid is collected in the container.

[0039] Once the vacuuming process is complete, the cover or the connecting ring attached to the cover is detached from the container, and the mounting ring is grasped and removed from the container along with the vacuum bag. After the cover is detached, the mounting ring is easily accessible and can be conveniently grasped and lifted.

[0040] The suction bag preferably includes a pull cord which is actuated after the liquid-filled suction bag has been removed from the container to tightly close the bag opening. The pull cord is held, for example, in eyelets or in a tubular end piece of the suction bag, which may optionally limit the bag opening.

[0041] The sealed suction bag can now be safely disposed of after removing the mounting ring, or together with the mounting ring. If the mounting ring is removed, it can subsequently be attached to a new suction bag.

[0042] Safety in handling the suction bag can be further increased by including liquid-absorbing material in the suction bag.

[0043] The process of assembling and disassembling the suction bag can be carried out using simple measures, without the suction bag detaching itself or liquid leaking from the bag.

[0044] To install the suction bag, it does not need to be attached to the cover. Attaching it to the cover would cause difficulties because the suction bag would need to be sealed tightly to the cover, and care would be taken to ensure that the bag does not detach itself. Instead, the end of the suction bag with the opening is inserted through the mounting ring and guided radially around the ring and back again. This process requires manipulating only the mounting ring, not the entire cover. Because the end of the suction bag is simply guided radially outwards around the mounting ring, a reliable connection between the mounting ring and the suction bag is practically automatic.

[0045] The suction bag, fitted with the mounting ring, can now be easily inserted into the container without the cover, which is normally connected to pipes, interfering with the design. Only after the suction bag has been conveniently inserted into the container and the mounting ring has been placed onto at least one support element, is the container closed with the cover. This avoids the problems described earlier in the prior art, where the suction bag connected to the cover could become wedged between the cover and the container. Instead, the suction bag is fully inserted into the container, allowing the cover to be fitted without any difficulty and resulting in a tight seal between the container and the cover, or between the container and the connecting ring screwed to the cover.

[0046] Once the vacuuming process is complete, the cover can be easily removed without special care, as the vacuum bag is not attached to it. Therefore, there is no risk of the vacuum bag detaching from the cover due to force during removal. Instead, the mounting ring can be grasped and removed from the open container along with the vacuum bag. The upper part of the vacuum bag, which is guided over the mounting ring, can then be repositioned and closed by pulling the cord. This process exposes the mounting ring, allowing it to be easily removed and reused. Because the upper part of the bag is guided around the mounting ring, contact between the mounting ring and the vacuumed liquid is avoided. The mounting ring is therefore not contaminated.

[0047] The described assembly steps can all be easily performed by the user. However, the assembly steps for connecting the mounting ring to the suction bag can also be carried out by the manufacturer, so that the user is provided with suction bags that already have a mounting ring and can be inserted directly into the container. In this case, only a thin mounting ring, and not, as with the solutions described at the beginning, an entire cover with the suction bag, needs to be disposed of.

[0048] The mounting ring is preferably elastically deformable and / or made of a hard-elastic or soft-elastic material. The elasticity of the mounting ring allows it to be easily installed and / or to press the bag edge, preferably tightly, against the inside of the bag wall and / or the at least one support element.

[0049] The at least one support element is preferably formed as a circumferential step or shoulder on the inside of the container wall or recessed into the container wall as a circumferential groove, with the underside of the groove preferably forming a shoulder. The at least one support element can therefore advantageously be integrally formed or molded onto the inside of the container wall. The mounting ring can, for example, be placed on the shoulder or positively inserted into the circumferential groove. Preferably, at least one protruding gripping element is provided on the mounting ring, which projects into the container space and can be grasped to release and / or lift the mounting ring.

[0050] In an unclaimed embodiment, the support element can be a ring element that is inserted into a circumferential groove in the container wall. Support elements can also be integrally formed as moldings, optionally bulges, on the housing wall.

[0051] The support element or elements can therefore be implemented in a simple manner without the need for a frame or the like.

[0052] The mounting ring can be attached to the at least one support element, optionally the shoulder, with a single movement and / or positively connected to the inside of the container wall, optionally inserted into a circumferential groove in which the elastic mounting ring is held and can only be released by applying force. The mounting ring is therefore preferably elastic and made of elastic material. The arrangement of the mounting ring on the shoulder is particularly advantageous, as this secures the mounting ring firmly and allows it to be compressed, preferably tightly sealed, against the shoulder by means of the cover or connecting ring. This prevents any aspirated liquid from entering the container and accumulating at the bottom.

[0053] In a further preferred embodiment, it is provided that the cover or the connecting ring connected to the cover has a flange ring by means of which a sealing ring is pressed tightly against an annular upper edge of the container.

[0054] For mounting the cover, the inner wall of the container between the container opening and the at least one support element is preferably provided with an internal thread onto which the cover or the connecting ring screwed to the cover can be screwed.

[0055] In a preferred embodiment, the connecting ring preferably has on one side a first threaded part that can be screwed to the container and on the other side a second threaded part that can be screwed to the cover, as well as an outer annular flange ring through which the sealing ring is pressed tightly against the upper edge of the container.

[0056] The connection of the cover, and optionally the connecting ring, to the container via threaded elements results in a stable and relatively tightly sealed connection between the container and the cover.

[0057] The container is also tightly sealed by means of the mounting ring, which is pressed against the ring-shaped shoulder inside the container, and / or by means of the sealing ring, which is pressed against the ring-shaped upper edge of the container.

[0058] It has been shown that with this tight seal of the container, even at high suction power, the suction bag is not pulled against the cover and can expand freely. Therefore, it is not necessary to create a vacuum between the outside of the suction bag and the inside of the container. Such a vacuum is only optionally provided via an auxiliary line connected to the supply line or directly to the suction device.

[0059] The invention is explained in more detail below with reference to the drawings. These show: Fig. 1a a device 1 according to the invention with a container 2 and a suction bag 3 arranged therein (shown schematically) as well as with a cover 6 which is connected to the container 2 by a connecting ring 5, to a suction device 8 by a connecting line 82 and to a suction head 811 by a suction line 81; Fig. 1b the device 1 of Fig. 1 with the suction bag 3, the container 2 and the connecting ring 5 in a longitudinal section with a view of an overflow protection device 91, which measures the level of the liquid inside the container 2; Fig. 2 a part of the device 1 of Fig. 1 with a part of the suction bag 3, which is held inside the container 2 by a mounting ring 4; Fig. 3 the cover 6, the connecting ring 5 and a part of the container 2 of Fig. 2 Separated from each other in sectional view; Fig. 4 aden suction bag 3 of Fig. 1 In a preferred embodiment, in a first step of the assembly method, the assembly ring 4 is slipped over the suction bag 3, dividing the suction bag 3 into a closed lower part 31 and an upper part 32 provided with the bag opening 30; and Fig. 4b the suction bag 3 of Fig. 4a in a second step of the assembly process, in which the upper part 32 of the suction bag 3 is guided downwards over the mounting ring 4, after which the suction bag 3 can be grasped on the mounting ring 4 and inserted into the container 2.

[0060] Fig. 1a Figure 1 shows a device according to the invention with a container 2 and a suction bag 3 arranged therein (shown in dashed lines).

[0061] The container 2 has a container wall 24, which has an inner side 241 and an outer side 242, which encloses a container space 200, and to which a container bottom 25 is attached at the bottom and a container opening 20 at the top (see Fig. 1b ).

[0062] Furthermore, a cover 6 is provided, which can optionally be connected to the container 2 by a connecting ring 5. Alternatively, the cover 6 can also be placed directly onto the container 2. This is possible, for example, by integrally molding the connecting ring 5 onto the cover 6 instead of connecting it to the cover 6 by a thread. By selecting a suitable connecting ring 5, different covers 6 can be placed on the container 2 as desired.

[0063] Container 2 and the cover are preferably made of plastic. The connecting ring 5 is preferably made of metal.

[0064] The cover 6 is connected to a suction device 8 by a connecting line 82 and to a suction head 811 by a suction line 81. The connecting line 82 and the suction line 81 are connected to connecting elements 71, 72, which are screwed into threaded holes in the cover 6.

[0065] A retaining element 73 is connected to the cover 6, by means of which the device 1 can be connected to the suction device 8, for example.

[0066] Furthermore, an optional auxiliary line 83 is shown, which is connected directly or indirectly to the suction device 8 and through which a negative pressure can be generated inside the container 2 between the outside of the suction bag 3 and the inner wall of the container 2.

[0067] However, by sealing the container 2 according to the invention, this auxiliary line 83 can be dispensed with.

[0068] A measuring cable 92 extends from the cover 6 and is connected inside the container to a level measuring device or overflow protection device and outside the container 2 to a connector 93. The measuring cable 92 is connected to a control unit which controls the suction device 8 and, if an overflow is detected in the container 2, generates a visual or audible warning signal or switches off the suction device 8.

[0069] Fig. 1b The device 1 of Fig. 1 with the suction bag 3, the container 2 and the connecting ring 5 in a longitudinal section with a view to the overflow protection 91, which is located in the interior or container space 200 of the container 2 and measures the level of the liquid.

[0070] The connecting ring 5 has an outer flange 53 through which a sealing ring 29 is tightly connected to an upper edge of the container 2. After the cover 6 or the cover with the connecting ring 5 is fitted, the container 2 is therefore tightly sealed.

[0071] The container 2 has an internal thread 21 near the container opening 20 and a support element 22 below the internal thread 21 in the form of a circumferential and preferably closed shoulder. A mounting ring 4 is supported on the support element 22, by which the hatched suction bag 3 is held.

[0072] The suction bag 3 and the steps for mounting the suction bag 3 in the container 2 are in Fig. 4a and Fig. 4b illustrated.

[0073] The single-use suction bags 3 are made of a plastic film, sealed at the bottom, and provided with a bag opening 30 at the top. Preferably, at least one retaining element 33, such as loops, eyelets, hose elements, pipe elements, or a hem, is provided adjacent to the bag opening 30, by which a pulling element 34 is held, and by means of which the bag opening 30 can be closed. Preferably, a hem 33 is provided, which is formed by folding an end piece of the suction bag 3 outwards adjacent to the bag opening 30 and welding it to the plastic film.

[0074] Suction bags 3 are preferably supplied in a package in which a large number of suction bags 3 are folded flat on top of each other.

[0075] Fig. 4a Figure 1 shows that in a first assembly step, the mounting ring 4 was guided over the suction bag 3, so that the mounting ring 4 encloses the suction bag 3 and divides it into a lower part 31, closed on one side, and an upper part 32 with the bag opening 30. To prepare for this assembly step, the suction bag 3 is preferably unfolded so that it assumes, for example, a cylindrical or tubular shape. The mounting ring 4 can be guided far upwards, so that the upper part 32 is preferably considerably shorter than shown.

[0076] Fig. 4b shows that in a second assembly step the upper part 32 is folded radially outwards over the mounting ring 4 and part of the lower part 31, so that the mounting ring 4 limits a receiving opening 300 of the suction bag 3.

[0077] In a third assembly step, the suction bag 3 connected to the mounting ring 4 is inserted into the container space 200 of the open container 2 and the mounting ring 4 is supported on the at least one support element 22, as shown in Fig. 2 shown.

[0078] In a fourth assembly step, the cover 6 or the connecting ring 5 connected to the cover 6 was placed on the container 2.

[0079] All assembly steps can be carried out conveniently without manipulating the container 2 or the cover 6.

[0080] Fig. 2 Figure 1 shows that the suction bag 3 is suspended from the mounting ring 4 and that the upper part 32 of the suction bag 3, which is guided around the mounting ring 4, hangs downwards with the pull cord 34 pointing towards the bottom of the container 25. In this position, it is not the mounting ring 4, but rather the upper part 32 of the suction bag 3 that rests against the shoulder-shaped support element 22 and the underside of the connecting ring 5. The mounting ring 4 is therefore insulated and cannot be contaminated by the suctioned liquid.

[0081] In preferred embodiments of the invention, the mounting ring 4 is positively connected to the inside of the container wall 24, optionally between upper and lower support elements or inserted into a circumferential groove, optionally an annular groove.

[0082] The mounting ring 4 preferably has at least one gripping element 45 by means of which the mounting ring 4 can be grasped, optionally released from a positive-locking connection with the inside of the container wall 24, and lifted. The gripping element 45 or gripping elements 45 can advantageously be integrally formed on the mounting ring 4 or can also be clamps or the like that enclose or pierce the mounting ring 4.

[0083] The upper part 32 of the suction bag 3 extends over the mounting ring 4, optionally over the at least one gripping element 45, and further within the container space 200 between the mounting ring 4 and the container wall 24 downwards towards the container bottom 25.

[0084] Preferably, the upper part 32 of the suction bag 3 is pressed elastically and tightly against the support element 22 and / or against the inner side 241 of the container wall 24 by the mounting ring 4. The suction bag 3 is therefore held completely within the container space 200.

[0085] The length of the upper part 32 of the suction bag 3, which is guided over the mounting ring 4, can be kept short so that it overlaps the mounting ring 4 and the lower part 31 of the suction bag 3 only slightly, for example by one to several millimeters or centimeters.

[0086] The arrangement of the pulling element or pull cord 34 on the upper part 32 of the suction bag 3 is particularly advantageous. After the upper part 32 of the suction bag 3 has been guided over the mounting ring 4, the pulling element 34 can be easily tightened in an optional intermediate step of the procedure to fix the suction bag 3 to the mounting ring 4.

[0087] As a result, the mounting ring 4 with the suction bag 3 can be placed particularly easily onto at least one support element 22, so that the suction bag 3 cannot detach itself from the mounting ring 4.

[0088] If the mounting ring 4 is made of a soft, elastic material, it is preferably slightly compressed by the cover 6 or the connecting ring 5, so that the mounting ring 4 also forms a sealing ring. The sealing ring 29 can therefore be omitted if the mounting ring 4 provides sufficient sealing of the container 2.

[0089] The cover 6 is tightly connected to the connecting ring 5, which is screwed to the container 2 and, together with the flange ring 53, presses the sealing ring 29 against the upper edge of the container 2. After the cover 6 and the optional connecting ring 5 are fitted, the container 2 is tightly sealed.

[0090] Fig. 2 Figure 1 shows that the internal thread 21 adjoining the container opening 20 is screwed to a first threaded part 51 on the underside of the connecting ring 5. The lower end 54 of the first threaded part 51 preferably rests against the mounting ring 4. The second threaded part 52 on the top of the connecting ring 5 is screwed to an internal thread of a connecting flange 61 of the cover 6.

[0091] After the suction bag 3 has been installed, the suction device can be put into operation. The suction device 8 creates a vacuum in the container 2 via the connecting line 82, which is then transmitted to the suction head 811 via the suction line 81. In a medical application, e.g., in a dental practice, air and fluid from the patient are drawn in via the suction head 811, as described in Fig. 1b symbolized by a white arrow and a hatched arrow.

[0092] The liquid (hatched arrow) is stored in the container 2, while air (white arrow) is guided around a separating element 99 and via the connecting line 82 to the suction device 8.

[0093] Fig. 2 The figure further shows that the overflow protection device 91 preferably has a float and a sensor or a switch S, which is activated or actuated by the displacement of the float when the container 2 overflows. The actuation of the switch or sensor is detected by a control unit, which controls the suction device 8 accordingly.

[0094] Fig. 3 The cover 6 with the two end elements 71, 72, which are inserted into threaded bores 601, 602 of the cover 6, shows the connecting ring 5 with the sealing ring 29 and a part of the container 2 with the mounting ring 4. Fig. 2 Separated from each other and shown in cross-sectional view.

[0095] The mounting ring 4 is placed on the shoulder-shaped support element 22, which projects into the container space 200. The hatched internal thread is provided between the container opening 20 and the support element 22. The first threaded part 51 of the connecting ring 5, which has an external thread, is screwed into the internal thread 21 of the container 2. The second threaded part 52 of the connecting ring 5 has a hatched external thread, which corresponds to a hatched internal thread 61 of the cover 6. The sealing ring 29 lies below the outer flange 53 of the connecting ring 5 and is pressed by it against an upper edge 28 of the container 2 as soon as the connecting ring 5 is screwed to the container 2. In this process, the underside 54 of the first threaded part 51 of the connecting ring 5 is preferably turned so far against the mounting ring 4 that it is fixed and, if necessary, compressed.

[0096] Fig. 4a shows the suction bag 3 of Fig. 1 in a preferred embodiment during a first step of the assembly process described above.

[0097] Fig. 4b shows the suction bag 3 of Fig. 4a in a second step of the assembly process. Reference symbol list

[0098] 1 Device 2 Container 20 Container opening 200 Container space 21 Internal thread 22 Support element 24 Container wall 241 Inside of container wall 242 Outside of container wall 25 Container bottom 28 Top edge 29 Sealing ring 3 Suction bag 30 Bag opening 300 Receiving opening 31 Closed lower part of the suction bag 3 32 Upper part of the suction bag 3 33 End piece 34 Pull cord 4 Mounting ring 45 Gripping element 5 Connection ring 51 First threaded part 52 Second threaded part 53 Flange ring 54 Lower end piece 54 of the first threaded part 51 6 Cover 601 Threaded hole 602 Threaded hole 61 Internal thread 61 of the cover 6 71 Connection element 72 Connection elements 73 Retaining element 8 Suction device 81 Suction line 811 Suction head 82 Connection line 83 Auxiliary line 91 Overflow protection 92 Measuring cable 93 Connection plug 99 Separation element

Claims

1. Device (1) for a suction device (8) with a container (2) that has a container wall (24), which has an inner side (241) and an outer side (242), which encloses a container space (200) and which is adjoned at the lower side by a container base (25) and at the upper side by a container opening (20), with a cover (6) for closing the container opening (20), with a mounting ring (4), and with a suction bag (3) intended for single use, which has a bag opening (30) at one end and is held and enclosed within the container space (200) by the mounting ring (4) and is divided into a lower part (31) closed on one side and an upper part (32) provided with the bag opening (30), which upper part (32) is folded back over the mounting ring (4) and a portion of the lower part (31) so that the mounting ring (4) delimits a receiving opening (300) of the suction bag (3), characterized in, that at least one support element (22) is formed on the inner side (241) of the container wall (24), on which the mounting ring (4) is supported in such a way that the upper part (32) of the suction bag (3) runs within the container space (200) between the mounting ring (4) and the container wall (24) against the container base (25).

2. Device (1) according to claim 1, characterized in, that the mounting ring (4) is elastically deformable and that the mounting ring (4) is made of a hard elastic or soft elastic material, so that the upper part (32) of the suction bag (3) can preferably be clamped between the mounting ring (4) and the container wall (24).

3. Device (1) according to claim 1 or 2, characterized in, a) that at least one support element (22) is formed as a circumferential step or shoulder on the inner side of the container wall (24); or b) that the at least one support element (22) is a circumferential groove provided in the container wall (24) and whose lower side preferably forms a shoulder; or c) that the at least one support element (22) is a ring element held in a groove in the container wall (24); or d) that support elements (22) are provided as formations in the container wall (24) what the pelvic site have I have.

4. Device (1) according to one of the claims 1 - 3, characterized in, a) that the mounting ring (4) is connected or connectable to the inner side of the container wall (24) in a form-fitting or force-fitting manner and is preferably provided with at least one gripping element (45); or b) that the mounting ring (4) is held in position by the cover (6) or by a connection ring (5) connected to the cover (6) or, preferably, pressed tightly against the at least one support element (22).

5. Device (1) according to one of the claims 1 - 4, characterized in, that the cover (6) or the connection ring (5) connected to the cover (6) has a flange ring (53) by means of which a sealing ring (29) is pressed tightly against a ring-shaped upper edge or end face (28) of the container wall (24).

6. Device (1) according to one of the claims 1 - 5, characterized in, that the suction bag (3) comprises a pull cord (34) which, when operated, closes the suction bag (3) or the bag opening (30), wherein the pull cord (34) is preferably held in eyelets or in a tubular terminal piece (33) of the suction bag (3) which delimits the bag opening (30).

7. Device (1) according to one of the claims 1 - 6, characterized in, that an internal thread (21) is provided between the container opening (20) and the at least one support element (22), onto which the cover (6) or the connection ring (5) screwed to the cover (6) is screwed.

8. Device (1) according to claim 7, characterized in, that the connection ring (5) has a first threaded part (51) screwed to the container (5) and, on the other side, a second threaded part (52) screwed to the cover (6) and an outer annular flange ring (53), by means of which the sealing ring (29) is pressed tightly against the upper edge (28) of the container (2).

9. Device (1) according to one of the claims 1 - 8, characterized in, that the cover (6) is connected by connecting elements (71, 72) to a connection line (82) which is connected to the suction device (8) and to a suction line (81).

10. Non-surgical, non-therapeutic method for mounting a single-use suction bag (3), which has a bag opening (30) at one end, in a container (2) of a device (1) according to one of claims 1 - 9, which container (2) has a container space (200) with at least one support element (22) provided therein, on which a mounting ring (4) can be supported, and with a container opening (20) adjoining it, which can be closed with a cover (6), characterized in, that in a first mounting step, the mounting ring (4) is guided over the suction bag (3) so that the mounting ring (4) encloses the suction bag (3) and divides it into a lower part (31) closed on one side and an upper part (32) provided with the bag opening (30), that in a second mounting step, the upper part (32) is folded back radially outward over the mounting ring (4) and part of the lower part (31) so that the mounting ring (4) delimits a receiving opening (300) of the suction bag (3), that in a third mounting step, the suction bag (3) is inserted into the container space (200) of the opened container (2) and the mounting ring (4) is supported on the at least one support element (22), and that in a fourth assembly step, the cover (6) or a connection ring (5) connected to the cover (6) is placed on the container (2).

11. Method according to claim 10, characterized in, that the mounting ring (4) is pressed tightly against the at least one support element (22) by the cover (6) or by the connection ring (5), which is connected or will be connected to the cover (6).

12. Method according to claim 10 or 11, characterized in, that the device (1) is connected to a suction device (8) by a connection line (82) connected to the cover (6), that the suction device (8) is put into operation, and that fluid is transferred to the suction bag (3) via a suction line (81) connected to the cover (6), liquid is transferred into the suction bag (3), after which the cover (6) or the connection ring (5) connected to the cover (6) is detached from the container and the mounting ring (4) is grasped and removed from the container (2) together with the suction bag (3).

13. Method according to claim 12, characterized in, that the suction bag (3) comprises a pull cord (34) which is actuated after the suction bag (3) has been removed from the container (2) in order to close the bag opening (30).

14. Method according to claim 12 or 13, characterized in, that the mounting ring (4) is removed from the filled suction bag (3) and connected to a new suction bag (3) and the filled suction bag (3) is disposed of, or that the mounting ring (4) is disposed of together with the filled suction bag (3).