EP2669243A1 - Device for lifting containers - Google Patents

Abstract

The device (1) has cylindrical housing (20) that accommodates piston (22) connected with piston rod (24) for transmitting reciprocating motion to container. An anti-rotation device (4) is accommodated in cylindrical housing for preventing rotation of piston rod with respect to cylindrical housing.

Description

Technical area

The present invention relates to a device for lifting containers in a filling device.

State of the art

It is known to provide in filling devices devices for lifting and lowering of containers, which serve to raise or lower the container to be filled with the product to be filled container to perform different process steps. For example, the mouths of the container must be supplied to the respective filling valves for filling with product. When bottling carbonated beverages, a substantially gas-tight pressing of the mouth of the container to the filling valve must take place.

Other applications of such devices for lifting containers, for example, involve transferring the containers from one pitch circle to another, or lifting operations in the area of closure members. The respective devices for lifting containers vary significantly in terms of their design, the drive and the hygienic implementation of each other.

In the known devices for lifting containers often anti-rotation devices are provided, which prevents rotation of the respective device about the lifting axis around. These anti-rotation devices are provided, for example, in the form of externally guided forks, which slide along a corresponding guide rail. Corresponding embodiments are for example from the EP 1 452 480 A1 and the EP 1 464 613 A2 known.

The anti-rotation serve on the one hand to intercept the centrifugal forces, which at a not exactly lying on the lifting axis center of gravity of the container and / or the Overall device for lifting containers then occur when the device is accelerated. This is always the case, for example, with a rotary filling machine.

On the other hand, via the anti-rotation also registered via a lift cam moments are supported. In certain embodiments, the device for lifting containers is controlled by a corresponding lift curve, in which a roller attached to the device is guided in a corresponding groove. As a result of the eccentrically registered frictional forces, a corresponding torque is applied to the device, which is supported via the anti-twist device. A corresponding device is for example from the DE 100 25 573 A1 known.

Also from the EP 0 402 643 A1 a lifting member for a vessel treatment machine is known in which the lifting movement is forcibly guided at least in the region of the lowering movement via a cam roller.

Presentation of the invention

Starting from the known prior art, it is an object of the present invention to provide a device for lifting containers, which is further improved in terms of their applicability in a filling device.

This object is achieved with the device for lifting containers with the features of claim 1. Advantageous developments emerge from the subclaims.

Accordingly, a device for lifting containers in a filling device is provided which has a cylinder housing and a piston received in the cylinder housing with a piston rod for transmitting a lifting movement, and an anti-rotation device for preventing rotation of the piston rod relative to the cylinder housing. According to the invention the rotation is received in the cylinder housing.

The fact that the rotation is taken in the cylinder housing, can be completely dispensed with an external anti-rotation. This results in a closed and hygienic unit, which can be used advantageously in the interior of a filling device and in particular in the clean room of an aseptic system. The elimination of a separate anti-rotation means that the number of surfaces to be cleaned and the Number of outboard components can be reduced, which also reduces the cleaning or sterilization effort accordingly.

Furthermore, results from the inclusion of the rotation in the cylinder housing a space reduction, so that a filling device can be made more compact or more filling valves can be added to a pitch circle.

Preferably, the piston is arranged double-acting in the cylinder housing, so that accordingly an active lifting movement and an active lowering movement can be performed. Accordingly, the piston rod can be actively moved along a predetermined trajectory, so that there is a closed adhesion between container, lifting mechanism and filling valve. Compared to a conventional, external curve control, this results in the further advantage that can be dispensed with a massive lift curve and the filler can therefore be simplified. In particular, it is possible to dispense with reinforcements of the valve carrier or of the base frame, because the intended positions can be directly controlled via the active control of the lifting cylinder with double-acting piston.

In a filling system with neck handling, the proposed device for lifting containers can be arranged directly next to the filling valve, so that the applied forces can be supported against each other via directly adjacent sections of the valve carrier. This results in a compact unit of the device for lifting containers and arranged next to the filling valve. The conventional lift curve can be omitted accordingly and replaced by a much simpler trained emergency curve, which forces only the movement of the device for lifting containers in the transfer position, when the activation of the double-acting piston should fail.

Due to the omission of the lift curve in normal operation on the rotation also loads much lower torques, which must be supported, as the registered over the conventional lift curve and the corresponding role torques omitted. The registered torques are then in a rotary filler only the registered due to an eccentricity of the center of gravity with respect to the lifting axis moments, which are very low compared to the conventional moments. Accordingly, the rotation can also be dimensioned weaker, which can lead to a further reduction of the volume of construction. In one variant, the piston is single-acting with a return device, preferably a spring return device, arranged in the cylinder housing. In this way, the advantages described in terms of compact and hygienic design can be achieved.

The anti-rotation device accommodated in the cylinder housing preferably has guide means, which are not rotationally symmetrical with respect to the axis of symmetry of the piston rod, between the cylinder housing and the piston. By not rotationally symmetrical with respect to the axis of symmetry of the piston rod designed guide means, a rotation of the piston rod can be achieved relative to the cylinder housing of the lifting cylinder accordingly.

In a preferred embodiment, the anti-rotation device comprises an eccentrically held in the cylinder housing with respect to the piston axis, extending in the stroke direction guide rod, which is guided in a complementary bore in the piston. Due to the eccentrically held guide rod according to a rotation of the piston and thus the piston rod can be avoided.

In a variant, the anti-rotation device may comprise a piston held eccentrically with respect to the piston axis and extending in the stroke direction, which is guided in a bore complementary thereto in the cylinder housing.

In a further development, the anti-rotation device can have a guide rod, which is arranged on the piston and extends in the stroke direction, with a non-rotationally symmetrical cross section, preferably a polygonal cross section, which is guided in a complementary bore in the cylinder housing. The thus formed anti-rotation can preferably be arranged centrally with respect to the piston rod, so that the force applied by the rotation friction forces are registered symmetrically to the piston axis. In this way, the occurrence of a tilting of the piston and the coefficients of friction can be reduced.

In one variant, the anti-rotation comprises a guide rod arranged on the cylinder housing with a non-rotationally symmetrical cross-section, preferably a polygonal cross-section, which extends in the stroke direction and which is guided in a complementary bore in the piston.

The polygonal cross section of the non-rotationally symmetrical guide rod can, for example, a triangular, quadrangular, pentagonal or hexagonal cross section have, or not be rotationally symmetrical in the form of an ellipse or an egg-shaped cross-section. The non-rotationally symmetrical cross-section has the effect that a rotation of the corresponding guide rod in the complementary bore is not possible and accordingly the registered torques can be supported.

In a further advantageous embodiment, the anti-rotation comprises a sliding block held on the cylinder housing, which is guided in a groove extending in the stroke direction in the piston. In a corresponding variant, a sliding block held on the piston is provided, which is guided in a groove extending in the stroke direction in the cylinder housing.

In a further advantageous embodiment, the anti-rotation comprises a extending in the stroke direction groove profile of a piston arranged on the guide rod, wherein the groove profile is guided in a complementary spherical bushing in the cylinder housing, wherein balls of the ball bushing engage in the groove of the guide rod.

In a corresponding variant, the anti-rotation device has a groove profile extending in the stroke direction of a guide rod provided on the cylinder housing, wherein the groove profile is guided in a complementary ball bush in the piston, wherein the balls of the ball bushing engage in the groove of the guide rod.

In a further advantageous embodiment, there may be a fluid connection between a guide rod of the anti-rotation device and a bore that is complementary to the guide rod.

The said possibilities for the rotation, which is accommodated in the cylinder housing, are advantageous in order to achieve a correspondingly compact and hygienic rotation, which requires only a small volume and which is designed so that a reliable operation of the device is made possible.

In order to achieve an even better cleaning of the device for lifting a container, at least one media guide, preferably all media guides, is integrated in the cylinder housing. Accordingly, external supply lines of the respective actuating media for the piston, for example pneumatic or hydraulic actuation media, can be dispensed with. This results in a reduction in the number of too cleaning surfaces and individual components, which is advantageous for operation in an aseptic filler.

Preferably, a supply of the media in the media guides via a mounting surface of the cylinder housing to a corresponding valve carrier instead, such that here also no external pipes or hoses are present, but the number of outer surfaces and the items to be cleaned can be further reduced.

Preferably, at the outlet of the piston rod from the cylinder housing and / or from a housing cover, an inner annular seal and an outer annular seal is provided, between which is provided around the piston rod extending around the leakage groove for discharging squat through the inner seal actuating medium. In this way, it is possible to achieve that actuating medium, for example a hydraulic or a pneumatic actuating medium, which has passed through the inner annular seal can be diverted via the leakage groove and a leakage channel connected thereto and accordingly can not escape into an example aseptic filling region. As a result, a further improved hygienic effect of the proposed device is achieved. In addition, an influence on the filling process in the mouth region of the container to be filled can be prevented.

The leakage channel is preferably brought into fluid communication with other system components on an end face of the housing. In this way, a secure and hygienic connection of the device to other system components can be achieved

Preferably, a container suspension for holding containers is connected to the piston rod at the end facing away from the cylinder housing end of the piston rod, which can be raised and lowered accordingly by means of the piston and the piston rod. In order to achieve reliable operation, a pivot point is preferably provided on the container suspension for attacking an emergency curve, preferably in the form of a roller, such that in the event of an emergency the container suspension can be moved to the starting position via the emergency curve.

Brief description of the figures

Figur 1

in einer schematischen Schnittdarstellung eine Vorrichtung zum Heben eines Behälters in einer ersten Ausführungsform mit einer außermittig angeordneten Führungsstange;

Figur 2

in einer schematischen Schnittdarstellung eine weitere Ausführungsform der Vorrichtung zum Heben eines Behälters mit einer mittig angeordneten Vierkantführung;

Figur 3

in einer schematischen Schnittdarstellung eine weitere Vorrichtung zum Heben eines Behälters in einer dritten Ausführungsform mit einer Nut und einem Kulissenstein;

Figur 4

in einer schematischen Schnittdarstellung eine weitere Vorrichtung zum Heben eines Behälters mit einer eine Nut aufweisenden, mittig angeordneten Führungsstange und mit einer Kugelbuchse;

Figur 5

in einer schematischen perspektivischen Seitenansicht einen Füllventilträger mit einer Vorrichtung zum Heben eines Behälters sowie mit einem Füllventil; und

Figur 6

der in Figur 5 gezeigte Füllventilträger in einer schematischen Schnittdarstellung.

Preferred further embodiments and aspects of the present invention are explained in more detail by the following description of the figures. Showing:

FIG. 1

in a schematic sectional view of a device for lifting a container in a first embodiment with an eccentrically arranged guide rod;

FIG. 2

in a schematic sectional view of another embodiment of the device for lifting a container with a centrally located square guide;

FIG. 3

in a schematic sectional view of a further device for lifting a container in a third embodiment with a groove and a sliding block;

FIG. 4

in a schematic sectional view of another device for lifting a container with a groove having, centrally disposed guide rod and with a ball bushing;

FIG. 5

in a schematic perspective side view of a filling valve carrier with a device for lifting a container and with a filling valve; and

FIG. 6

the in FIG. 5 shown filling valve carrier in a schematic sectional view.

Detailed description of preferred embodiments

In the following, preferred embodiments will be described with reference to the figures. In this case, identical, similar or equivalent elements in the different figures are denoted by identical reference numerals and a repeated description of these elements will be omitted in the following description in part in order to avoid redundancies. FIG. 1 shows a device 1 for lifting a container in a filling device, wherein a lifting cylinder 2 is provided which has a cylinder housing 20 and a piston 22 received in the cylinder housing. The piston 22 is linearly movable in the cylinder housing 20 by the application of a corresponding actuating medium. On the piston 22, a piston rod 24 is arranged, which transmits the corresponding linear lifting movement relative to the cylinder housing 20 on a not shown in the figure container suspension. The formation of such a lifting cylinder with a cylinder housing, a piston and a piston rod is known per se.

The respective actuating media are transmitted via directly into the cylinder housing 20 introduced media channels. For example, a first media channel 30 is provided, by means of which the in FIG. 1 shown upper chamber between the piston 22 and cylinder housing 20 can be filled with actuating medium. For example, here compressed air can be introduced into the upper chamber. A second media channel 32 is also inserted into the cylinder housing 20 and serves to pressurize the lower chamber with actuating medium. Accordingly, it is in the in FIG. 1 shown lifting cylinder 2 to a double-acting cylinder in which alternately the corresponding actuating medium can be introduced under pressure into the upper chamber via the media channel 30 and into the lower chamber via the media channel 32, so that the piston 22 according to up or down emotional. A sealing of the two chambers against each other is achieved by means provided on the piston 22 seals 220, 222, which perform a sealing of the piston 22 against the cylinder housing 20.

The lower chamber is further accomplished in the region of the passage of the piston rod 24 through the cylinder housing 20 - or by a housing cover 26 - via an inner annular seal 240 and an outer annular seal 242. In addition, a leakage channel 34 is provided, which ends in an annular groove 340 which is introduced between the two ring seals 240, 242 at the passage of the piston rod 24 through the cover 26 of the housing 20 around the piston rod 24 around. The annular groove 340, together with the leakage channel 34, reliably dissipates any actuating medium, for example pneumatic air or hydraulic oil, that has passed through the inner annular seal 240. Accordingly, the outer ring seal 242 only has to seal against ambient pressure, so that it can be very reliably avoided that actuating medium emerges from the device 1. Accordingly, the leakage channel 34 and thus the annular groove 340 is preferably at the pressure level, which rests outside of the cylinder housing 20.

Furthermore, a scraper 244 is provided at the lowermost end of the passage, which is to prevent a dirt entry into the seals 242, 240.

In order to prevent a rotation of the piston rod 24 about its axis of symmetry 200 around, a rotation 4 is provided. The rotation 4 is in the in FIG. 1 shown embodiment in the form of an eccentrically arranged guide rod 400, which is held in the cylinder housing 20. The guide rod 400 is guided in a bore 402 in the piston 22 complementary to the guide rod 400. Both the guide rod 400 and the bore 402 complementary thereto extend in the stroke direction of the lifting cylinder 2 in such a way that upon an upward movement, the guide rod 400 plunges into the complementary bore 402. Characterized in that the guide rod 400 eccentrically and correspondingly outside the axis of symmetry 200 of the piston rod 24 and the piston 22, introduced via the piston rod 24 torques, which are generated for example by centrifugal forces of the held container reliably supported by the bore 402 on the guide rod 400 , The bore 402 advantageously does not completely penetrate the piston 22, so that there is no fluid connection between the two fluid-loaded chambers above and below the piston 22. Alternatively, it is possible that the bore 402 penetrates the piston 22, but then one or more suitable seals between piston 22 and guide rod 400 are required.

In a variant that in FIG. 1 is not shown, the guide rod 400 is held in the piston 22 and is guided in a complementary bore in the cylinder housing 20.

In the embodiments in which a guide rod 400 dips into a bore 402, it is advantageous to ensure that the fluid trapped within the bore can escape during the immersion and can flow back into the bore during the replacement. This is achieved, for example, by a groove (not shown) along the bore 402 or along the guide bar 400. Alternatively, for example, would also be possible to perform the eccentrically arranged guide rod as a polygon and the bore in cross-section circular.

The connection of the media channels 30, 32, as well as the leakage channel 34 preferably takes place on an end face 28 of the housing 20. Accordingly, as in the following, for example, in the in the Figures 5 and 6 shown embodiment, a connection of the housing 20 of the lifting cylinder 2 to a valve carrier can be achieved so that outer Media feeds are not necessary. Accordingly, a reduction of the required parts as well as the surfaces to be cleaned can be achieved. By connecting the respective media via the end face 28, a particularly hygienic embodiment of the device 1 for lifting containers in a filling device can be achieved accordingly.

In FIG. 2 a further lifting cylinder 2 is shown, which one to the in FIG. 1 having similar structure shown. An anti-rotation 4 is shown here in a variant.

To the piston 22 to a non-rotationally symmetrical with respect to the rotation axis 200 of the piston rod 24 formed guide rod 422 is provided. The guide rod 422 is in the in FIG. 2 embodiment shown formed with a polygonal cross-section and in particular with a square cross-section. The corresponding trained with a square cross-section guide rod 422, which is attached to the piston 22, is guided in a corresponding complementary bore 420 in the cylinder housing 20 against rotation. Accordingly, the guide rod 422 immersed in an upward movement of the piston 22 in the bore 420 in the cylinder housing 20 and is pulled out of this in a downward movement of the piston 22 again. By correspondingly non-rotationally symmetrical cross-section of the guide rod 422, in turn, an effective rotation is achieved.

In particular, torques, which are registered via the piston rod 24 on the piston 22, via the polygonal cross-section having guide rod 422 are supported on the corresponding complementary surfaces of the bore 420 of the housing 20.

In a variant, a corresponding, non-rotationally symmetrical with respect to the axis of rotation 200 of the piston rod 24 designed guide rod can also be held on the cylinder housing 20, which is then guided in a complementary bore in the piston 22.

In these variants of the described embodiment is advantageous to ensure that no fluid is trapped in the bore 420, but that this can escape and flow.

FIG. 3 shows in a further variant, the lifting cylinder 2 in a similar to the previous variants training.

An anti-rotation 4 is provided in the form of a housing 20 held on the sliding block 440, which is guided in a groove 442 on the piston 22. Correspondingly, an anti-rotation of the piston rod 24 with respect to their axis of symmetry 200 takes place again here, since the sliding block 440 is supported via the groove 442 via a torque possibly applied via the piston rod 24 to the piston 22. In this variant, too, a reliable support of possibly introduced torques takes place, so that an effective security against rotation is given.

In a variant, the sliding block 440 may also be carried by the piston 22 and the groove 442 may be correspondingly formed in the cylinder housing 20 in a complementary manner thereto.

A possibly between sliding block, cylinder housing and piston caged fluid can also escape here via a possibly additionally arranged fluid connection (not shown) in the lower cylinder chamber and flow back again.

In FIG. 4 a further embodiment of the lifting cylinder 2 is shown, which in turn in its basic structure in the preceding FIGS. 1 to 3 shown lifting cylinders is similar. The anti-rotation 4 is formed via a guide rod 460 with correspondingly incorporated grooves 462, wherein the guide rod 460 dips into a corresponding ball bushing 464.

The guide rod 460 with the guide grooves 462 is in the in FIG. 4 shown embodiment, held on the piston 22. The guide rod 460 dips into the ball bushing 464 formed in the cylinder housing 20 of the lift cylinder 2. In this case, the balls 466 of the ball bushing 464 engage in the complementary grooves 462 of the guide rod 460. Correspondingly, a torque entered via the piston rod 24 can be supported via the guide rod 460 and its grooves 462 on the balls 466 of the ball bush 464 which are fixed relative to the cylinder housing 20, so that in turn an effective securing against rotation is achieved.

In a corresponding variant, in turn, the guide rod can be held on the cylinder housing and the ball bushing complementary to be provided in the piston.

In this embodiment as well, the fluid trapped in the ball bushing can escape into the upper chamber of the cylinder during a lifting movement, for example via the grooves 462, and flow back again during a lowering movement.

Further embodiments of an anti-rotation device along the aforementioned exemplary embodiments are also conceivable. It is essential that the rotation is arranged within the housing of the lifting cylinder, in order to achieve a reduction of the space from the lifting cylinder and rotation and on the other hand to reduce the number of external components and the number of surfaces to be cleaned in order to achieve a hygienic training ,

In FIG. 5 the device 1 for lifting containers is shown in a schematic representation, wherein it is incorporated into a filling device 100 for filling containers, which in addition to the device 1 for lifting the container and a filling valve 102, corresponding rinsing, biasing and relief valves 104th , a product supply line 106 with a flow meter 108, and a valve carrier 110 shows.

The device 1 for lifting the container comprises the lifting cylinder 2 in a form such as those for example FIGS. 1 to 4 was described. Furthermore, a container suspension 5 is provided, which comprises a corresponding receiving clamp 50 for receiving a container in the neck ring area. Accordingly, this is a so-called NeckHandling container suspension. The container suspension 5 further comprises a portion 52 having an articulation point 54 for an emergency curve. As in FIG. 6 it can be seen which the in FIG. 5 A filling container 100 shown in a sectional view, a container 6 can be held in accordance with the bracket 50 of the container suspension 5. The articulation point 54 is provided so that it can interact with the emergency curve 540 shown correspondingly schematically.

The media channels 30, 32 and 34 are connected directly to the valve carrier 110 via the end face 28 of the cylinder housing 20.

As it turned out FIG. 5 results, the space of the device 1 for lifting the container is low, so that it can be placed very close to the filling valve 102. This results in a construction space reduction of the overall system, so that the entire filling device 100 can either be made more compact, or the machine pitch can be reduced, so that a higher number of filling valves can be provided. In addition, results from FIG. 5 Also, that the surfaces to be cleaned of the device 1 for lifting containers greatly reduced so that a simple cleaning is made possible and accordingly an application in an aseptic filler can be promoted.

As far as applicable, all the individual features illustrated in the individual embodiments can be combined and / or exchanged without departing from the scope of the invention.

LIST OF REFERENCE NUMBERS 1 Device for lifting containers 100 filling 102 filling valve 104 Flush, preload and relief valve 106 product supply 108 Flowmeter 110 valve 2 lifting cylinder 20 cylinder housing 22 piston 24 piston rod 26 housing cover 28 Face of the housing 200 Symmetry axis of the piston rod 220 seal 222 seal 240 inner ring seal 242 outer ring seal 244 scraper 30 first media channel 32 second media channel 34 leakage channel 340 ring groove 4 twist 400 guide rod 402 Bore for receiving the guide rod 420 Bore for receiving the guide rod 422 guide rod 440 sliding block 442 groove 460 guide rod 462 groove 464 ball socket 466 roll 5 container suspension 50 recording terminal 52 section 54 Articulation point for emergency curve 540 emergency curve 6 container

Claims (18)

Device (1) for lifting containers (6) in a filling device, comprising a cylinder housing (20) and a piston (22) received in the cylinder housing (20) with a piston rod (24) for transmitting a lifting movement, and an anti-rotation device (4 ) for preventing rotation of the piston rod (24) relative to the cylinder housing (20),
characterized in that
the rotation lock (4) is received in the cylinder housing (20). Device (1) according to claim 1, characterized in that the piston (22) is arranged double-acting in the cylinder housing (20). Device (1) according to claim 1, characterized in that the piston (22) is single-acting with a return device, preferably a spring return device, in the cylinder housing (20) is arranged. Device (1) according to one of the preceding claims, characterized in that in the cylinder housing (20) received against rotation (4) not rotationally symmetrical with respect to the axis of symmetry (200) of the piston rod (24) formed guide means between the cylinder housing (20) and the piston ( 22). Device (1) according to one of the preceding claims, characterized in that the rotation lock (4) in the cylinder housing (20) with respect to the piston axis (200) eccentrically held in the stroke direction extending guide rod (400), which in a complementary bore (402) is guided in the piston (22). Device (1) according to one of the preceding claims, characterized in that the anti-rotation device (4) comprises an eccentrically held on the piston with respect to the piston axis (200) extending in the stroke direction guide rod which is guided in a complementary bore in the cylinder housing. Device (1) according to one of the preceding claims, characterized in that the anti-rotation device (4) comprises a piston (22) arranged in the stroke direction extending guide rod (422) having a non-rotationally symmetrical cross-section, preferably a polygonal cross-section, which in a complementary bore (420) in the cylinder housing (20) is guided. Device (1) according to one of the preceding claims, characterized in that a cylinder housing arranged on the guide rod is provided with a non-rotationally symmetrical cross-section, preferably a polygonal cross-section, which extends in the stroke direction and which is guided in a complementary bore in the piston. Device (1) according to one of the preceding claims, characterized in that the anti-rotation comprises a cylinder housing (20) held sliding block (440), which is guided in a stroke direction extending groove (442) in the piston (22). Device (1) according to one of the preceding claims, characterized in that a sliding block held on the piston is provided, which is guided in an extending in the stroke direction groove in the cylinder housing. Device (1) according to one of the preceding claims, characterized in that the anti-rotation device has a groove profile (462) extending in the stroke direction of a guide rod (460) provided on the piston (22), the groove profile (462) being in a complementary ball bushing (462). 464) in the cylinder housing (20) is guided, wherein balls (466) of the ball bushing (464) engage in the groove (462) of the guide rod (460). Device (1) according to one of the preceding claims, characterized in that the anti-rotation comprises a groove extending in the stroke direction of a cylinder housing provided on the guide rod, wherein the groove profile is guided in a complementary spherical bush in the piston, wherein balls of the ball bush in the groove of Engage guide rod. Device (1) according to one of the preceding claims, characterized in that at least one media feed (30, 32) in the cylinder housing (20) is guided. Device (1) according to claim 13, characterized in that at least one media feed (30, 32) via an end face (28) of the housing (20) is directly contacted. Device (1) according to one of the preceding claims, characterized in that at the outlet of the piston rod (24) from the cylinder housing (20) and / or a housing cover (26) an inner ring seal (240) and an outer ring seal (242) are provided, between which a to the piston rod (24) around extending leakage channel (34) is provided for discharging through the inner seal (240) recessed actuating medium. Device (1) according to claim 15, characterized in that the leakage channel (34) on an end face (28) of the housing (20) in fluid communication with other system components can be brought. Device (1) according to one of the preceding claims, characterized in that on the cylinder housing (20) facing away from the end of the piston rod (24) has a container suspension (5) for holding containers (6) with the piston rod (24) is connected. Device (1) according to claim 17, characterized in that the container suspension (5) is provided with an articulation point (54) for an emergency curve (540).

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