DE8121384U1 - DETACHABLE PIPE COUPLING AND CARTRIDGE FOR FORMING SUCH PIPE COUPLING - Google Patents

Description

Detachable 'pipe coupling and cartridge to form such Pipe coupling description

The invention relates to a releasable pipe coupling and its manufacture, and in particular to a cartridge that can be inserted into a body to form such a pipe coupling. The invention also relates to a Method for assembling the cartridge with the body and a releasable pipe coupling produced according to this method.

Detachable pipe couplings formed by inserting a cartridge into a body are known. In the GB PS 1 270 648 describes a releasable pipe coupling which has a body, a sleeve, a clamping element in the form of a ring and a pipe seal in the form of an O-ring. The body has essentially four coaxial bores, from

Deutsche Bank (Munich) KIo. 51/61070

Dreadnei Basi (Munich) Kb. CfeM

Postal check (Munich) KIo. 670-43-804

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I where the hole with the smallest diameter serves as a flow channel connected to the inside of the pipe, the hole with the second smallest diameter serves as an end stop to ^{fix the end of the pipe 1} " ¹ in the radial direction and to the Limitation of its insertion length in the I body is used, the second largest hole forms a seat for the 0-P ring and the largest hole receives the sleeve with a fixed seat.
? -

i 10 This known pipe coupling is made using a pa-

I tronen subassembly manufactured to mass produce

| ,, to facilitate the pipe couplings and to make it easier for the customers

I; enable such a detachable pipe coupling in any *

to install a single body, which can be provided with the required 15 four coaxial holes. The cartridge sub-assembly includes a plastic molded plug,! the one thickened part of the head, which is attached to the outer end of the sleeve.

I and has an integrally molded shaft,

I which extends in the axial direction through the sleeve, the clamping ring and

|: 20 extends the O-ring. The clamping ring is designed so that |; it must be inserted into the inner end of the sleeve, and

I the O-ring elastically grips the end of the shaft so that the

■ This holds the subassembly together. At the

Use the shaft end of the subassembly in 25 the prepared holes in the body and is inserted

an axial force is exerted on the thickened head of the plug to force the sleeve into the largest diameter bore to push = After this installation step has been carried out, the plug is axially out of the outer end 30 of the sleeve pulled out and thrown away. Although this cartridge sub-assembly compared to previous proposals

I has numerous advantages and actually has considerable economic

I was able to achieve economic success, it also has disadvantages. The use of this cartridge subassembly requires the previous formation of four precisely dimensioned,

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till »ί 11 I ■! · ,! I.

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I coaxial bores as well as the use of a support plug,!

which then has to be thrown away. Furthermore, the result!

The current pipe coupling cannot be serviced, since both the 0- |;

Ring as well as the clamping ring in the body of the sleeve | §

are closed, which in turn are not pulled out ρ

can without significant risk of damage to the clamping ring?

and the body. Although the cartridge subassembly is thus *

possible that the described type of detachable Rohrkupp- f ment in a very wide range of

Bodies or objects can be installed, can

do not avoid the risk that any damage to the cheap- f:

most component, namely the O-ring, probably to the §

usefulness of the body leads to several other, same jjpl

before pipe couplings can have and usually the |;

most expensive component is. I.

The invention has for its object to provide a releasable coupling pipe i which are free of at least a portion of the
disadvantages discussed above.
20th

According to the invention, this object is achieved by a cartridge

for insertion into a body to form a releasable coupling, with a sleeve that delimits a chamber and i

I has an outer surface that engages in a bore in the body | can be fastened with a clamping ring which has an essentially ring-shaped, supporting part which carries a plurality of elastic arms which run essentially axially and are spaced apart from one another and each with means J ₁

ι a \ inserted pipe are for detecting the outer cylindrical surface provided with a sealing ring, | which can cooperate with the outside of the pipe, f

I the elastic arms of the clamping ring inside the chamber so | are arranged to be in engagement with a portion of the f

i can enter the chamber wall in the direction of one end of the ]

Sleeve converges so that movement of the clamping ring in I.

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Direction towards one end of the sleeve causes the ends of the resilient arms to be compressed, and being provided is that the sealing ring is carried by the other end of the sleeve and has an annular surface which is with a complementary surface of the sleeve cooperates.

In a preferred embodiment of the invention, the sealing ring is arranged completely within the chamber, being held in the sleeve by a stop. In an advantageous embodiment of the invention, it can also be provided that the stop comprises a constriction which is formed in one piece with the sleeve at the other end. The chamber is preferably manufactured by machining from the other end of the sleeve AIUs, and the constriction is preferably formed by subsequent deformation of the sleeve inwardly. · ¹ The other end of the sleeve preferably has a portion of reduced thickness, which is then to form a annular lip, which represents the constriction, is pressed inwards. On the other hand, the constriction can also be produced directly by machining.

In another preferred embodiment, the stop of a portion of a stop device for the Tube formed which is carried by the other end of the sleeve.

In this embodiment, the stop device has a Section, for example a circumferential flange, which is arranged in the chamber and which with one of its surfaces forms the stop. This section is preferably retained in the sleeve by means of a constriction, for example is designed in the manner described above and is located at the other end of the sleeve. The stop device may have a tubular section which defines the position of the end of the tube in the radial direction, and furthermore be provided with an inwardly directed flange at the end remote from the seal which engages with

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can occur at the end of the tube, thereby reducing its insertion depth in the body limit.

The sealing ring is preferably an O-ring or can be a section have, which protrudes in the axial direction from the other end of the chamber and thereby a face seal with a complementary surface of the body. Furthermore, the sealing ring can have a portion from the other end the chamber protrudes radially outward and with a complementary one Surface of the body forms a ring seal.

The sleeve can have an outer flange at one end

which limits the insertion of the sleeve into the body. Alternatively, the sleeve may be provided with an outer flange at its other end so that the sleeve ^{can be inserted into the bore J} from within the body.

The outer surface of the sleeve comprises at least eiuen portion which can form a ¹ FES seat with the bore in the body. The outer surface of the sleeve can have an annular section with a slightly larger diameter in order to produce this interference fit.

To bring about fluid tightness or to improve ■ '.,. To ensure the tightness between the sleeve and the body, a sealing ring, for example an O-ring _{#, can be provided} in a circumferential groove which is formed in the outer surface of the sleeve. Alternatively, a layer of sealant can be provided between the sleeve and the body. The sealant, when used, can additionally serve to hold the sleeve in place in the body or to help hold it in place. Alternatively, the outer surface of the sleeve can be threaded which can engage complementary threads in the body.

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The sleeve preferably has a section extending from one end of the sleeve. The elastic arms of the Clamping ring have such a distance from one another that the clamping ring can be pulled out of one end of the sleeve can. The clamping ring preferably has a flange ", who is "outside" the sleeve and ah the one End of the sleeve can rest 'without the sealing ring damaged.

The invention also includes a releasable pipe coupling which comprises the cartridge described above, the sleeve in a hole in the coupling body is attached. The releasable pipe coupling can also be between the outside of the sleeve and the body comprise a binder and / or a sealant.

The invention also includes a method of installing a cartridge of the type described above in a bore of a Body in order to produce a releasable pipe coupling in this way. This method involves using the sleeve the bore is aligned and that an axial force is applied to the sleeve to bring it into the bore to press. In an advantageous embodiment of the method according to the invention it can be provided that a binder and / or a sealant is applied to the outer surface of the sleeve and / or the wall or walls of the body, which limit the opening before the sleeve is inserted into the body.

Embodiments of the invention are shown in the drawings and are explained in more detail below. It demonstrate:

Figure 1 is a view, partially in section, of an embodiment of a cartridge which is in a drilling

figure

figure

figure

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tion is fixed in a body and thereby forms a releasable pipe coupling;

an axial half section through a further embodiment of a cartridge, which is in a Bore in a body is secured to form a releasable pipe coupling;

a view, partly in section, through yet another embodiment of a cartridge, which is mounted in a bore of a thin-walled body; and

a view, partly in section, through a cartridge similar to that shown in FIG but is bolted to the body.

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In the following, FIG. 1 will first be discussed. A sleeve 10 can be seen therein, which surrounds a chamber 11 and a Has outside, to which a long cylindrical portion 12, two grooves 13 and 14, a clamping shoulder 15 and a short cylindrical section 16 belong. The cylindrical Sections 12 and 16 have essentially the same diameter, but the clamping shoulder 15 has a slightly larger diameter so that there is a tight fit in a bore 17 of a body 18. The clamping shoulder 15 forms thus an annular section of the outside of the sleeve 10.

A known clamping ring 19 comprises a cylindrical main part 20, which is formed at one end with a Flange 21 is provided and at its other end several axially extending, radially separated, elastic, Has molded arms 22. The flange 21 protrudes at the right end of the sleeve 10, as shown, while the arms 22 are arranged within the chamber 11. Each arm 22 is at its free end on the one hand with a tooth 23, the can cooperate with the outside of a hose or tube 24 and on the other hand provided with a head 25 which can cooperate with a section 26 in such a way that when the clamping ring 19 moves to the right, the sleeve 10 causes the free ends of the arms 22 to be compressed. In this way, the from the teeth 23 takes on the Holding force exerted on the pipe 24 when the pressure in the coupling increases or when an attempt is made to pull the pipe 24 out of the Chamber 11 to pull without first the head 25 of the clamping ring 19 to press against the sleeve 10. The cylindrical main part 20 of the clamping ring 19 is axially displaceable in arranged in a cylindrical section 27 of the chamber wall.

A sealing ring designed as an O-ring 28 acts with the outside of the tube 24 together and is from the left end of the

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j sleeve 10 worn. The O-ring 28 is in a cylindrical

Section 29 of the chamber wall arranged so that the outer, annular surface of the O-ring 28 sealingly with the complementary Co-operates surface, which the cylindrical portion 29 has. The O-ring 28 is thus in the chamber 11 arranged and is of a constriction in the form of a circumferential lip 30 held in its installation position, which by flanging or pressing a cylindrical preform in

\ the desired shape or another process has been created

the one in which there is an inward deformation.

The sleeve 10 can be manufactured particularly economically by a series of rapid machining operations on brass rod material using a computer-controlled lathe, for example. However, the sleeve 10 can also be produced in other ways. During manufacture, the sections or bores 29, 26 and 27 are during a first work step formed in the end of the rod material, after which then during a second work step the outer profile of the sleeve including the cylindrical preform is formed. In a third step the cylindrical preform is crimped or pressed so that the lip 30 is formed. In the final, last step the finished sleeve is separated from the rod material. Alternatively, the lip 30 can be machined back be generated. Furthermore, as an alternative, the O-ring 28 can also be arranged in an annular groove, which is made by machine Back turning is formed.

Apart from the good use of material, the cartridge is a completely self-contained or independent sub-assembly represents, in which the O-ring and the clamping ring in their

yj installation positions are held without any

Auxiliary items that are then thrown away, or special ones Assembly tools are required. Since the O-ring inside

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DE 1379

is located halfway through the sleeve, is the machining required on the body 18 to receive the cartridge easier, since only the single bore 17, which is expediently designed as a smooth cylindrical bore, needs to be provided both for receiving the sleeve and the O-ring. It can also be seen that the number the components of the cartridge is limited to the three components actually required, and that the body 18 is only has three bores, namely the bore 17, a bore 31 for receiving the end of the tube 24, which at the same time an end stop 32 and a flow channel 33, which is aligned with the bore or opening of the pipe. The described design of the cartridge also leads to the fact that the depth of the holes 17 and 31 designed as blind holes in the body 18 is minimal, which has the consequence that less machining is required and that the 'body is correspondingly less weakened may very well have further »flow channels that must not be interrupted.

The cartridge is installed in the body 18 in that the sleeve 10 is aligned with the bore 17 and that then a force acting in the axial direction is exerted on the flange 21 of the clamping ring in order to bring the sleeve into its installation position to press. If necessary, the left end of the sleeve can be provided with a short conical guide surface, to make initial alignment easier.

In the previously known cartridge subassemblies, the clamping ring is always inserted from the O-ring end of the sleeve so that it could not have a flange 21 unless it was formed after the insertion has been. In contrast, the clamping ring training shown is a training for Non-cartridge assemblies have been developed like them

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for example in "Product Engineering", October 1971, pages 42 and 43, is shown. In this clamping ring design, the elastic arms of the clamping ring have a sufficient one large distance from each other to allow the clamping ring to be pulled out through the right end of the sleeve and is introduced by exerting a corresponding axial force on the flange 21 of the clamping ring. By application this clamping ring training in a cartridge subassembly has the further advantage that after the Sleeve has been permanently set in the body 18, both the clamping ring 19 and the O-ring 28 for checking and can be expanded for exchange, so that for the first time there is a cartridge insert that requires maintenance after use enables.

Although the engagement of the clamping shoulder 15 in the bore 17 results in more than the required mechanical holding force (studies have shown that this holding force can withstand separation forces that are greater than those at five times the working pressure), an adhesive sealant is preferably used between the sleeve 10 and the Body 18 is provided to ensure that no leakage occurs. Such an adhesive sealant also increases the mechanical holding force with which the sleeve 10 is held in the body 18. In FIG. 1 it can be seen that a layer 34 of such an adhesive sealant is arranged in the gap between the longer cylindrical section 12 and the bore 17. The sealant can either be applied to the sleeve 10 or introduced into the bore 17 immediately prior to assembly. Alternatively, the sealant can be applied as an adhesive layer during manufacture of the cartridge, which can later be deformed somewhat in the radial direction so that it seals effectively on the wall of the bore 17.

The use of an adhesive sealant between the sleeve

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se 10 and the body 18 additionally increases the usefulness of the various illustrated cartridges that are used in bodies can be used, which can consist of a material from a very wide range, including plastic materials, ceramic materials, glass and other brittle materials. With such materials there would be no tight fit or at best A tight fit with a slight excess between the sleeve 10 and the Body 18 in question. Rather, it would have to be essentially the adhesive Resist sealant from the force of the blowout. In this context it should be noted that it is also intended to produce the sleeve 10 from a material compatible with that of the body, and another method for To connect these elements to each other to use, for example, this adhesive, welding, ultrasonic welding or use high frequency welding.

If necessary, the clamping shoulder 15 can be omitted and the sleeve 10 can be replaced by means of a different mechanical device be held in position, for example by means of an external thread on the sleeve 10, which is complementary Internal threads in body 18 are engaged like this is shown in FIG. Alternatively, an adhesive can be used to secure both the sleeve 10 in the bore 17 secure, as well as for the seal between the sleeve 10 and to take care of the body 18.

The general construction according to FIG. 1 can also be, for example can be modified in that differently designed clamping rings 19 and / or other types of sealing rings are used be, for example, a sealing ring with a lip seal that interacts with the outside of the tube 24.

Instead of using the head or flange 21 of the clamping ring 19 as a tool for inserting the sleeve 10 into the body 18, a separate tool can be used that

• · I

• 111

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either has an annular working surface, which the Surrounds head or flange 21 and is in contact with the outer area of the right end face of the sleeve 10, or that has a working surface which can be arranged between the flange 21 and the right end face of the sleeve 10. If the head or flange 21 of the clamping ring 19 is to serve as an insertion tool, it is important to ensure that the flange 21 on the right end face of the sleeve 10 can rest without the free ends of the arms 22 of the clamping sleeve damaging the sealing ring. Alternatively, the Coupling can also be formed by first pulling the clamping ring 19 out of the sleeve 10 that the Sleeve 10 is then pressed into the body 18 by means of a suitable tool and then the clamping ring again 19 is used.

. 'j

In FIGS. 2 to 4, the same reference numerals as in FIG. 1 are used to designate identical or equivalent components used, the components provided with the same reference numerals having the same function, unless expressly the opposite is stated.

The embodiment shown in FIG. 2 is the one below Very similar to the embodiment explained with reference to FIG. 1 and only differs with regard to the design the outside of the sleeve 10. In the embodiment according to Figure 2, the clamping shoulder 15 is in the wall of the bore 17 embedded, and the cylindrical portions 12 and 16 are also directly in contact with the wall of the bore 17. For fluid-tight sealing between the sections 12 and 16 on the one hand and the wall the bore 17, on the other hand, is provided by a sealing ring 35 which is arranged in a circumferential groove 36 formed in the sleeve 10 and is slightly compressed in the radial direction. Provided that the surfaces in contact are sufficiently smooth

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DE 1379

Have surfaces and have suitable fits, al ternatively for adequate sealing between the sleeve 10 and the body 18 without the use of an additional
Sealant must be provided, as represented by the layer 34 of adhesive sealant according to FIG. 1 or the O-ring 35 according to FIG.

The embodiment according to FIG. 3 is similar to the embodiment according to FIG
Deep drawn parts, machining, injection molding or compression molding can be made and
is also carried by the sleeve 10. The stop device 37 comprises a central cylindrical portion 38 with an outwardly directed flange 39 at its right end and an inwardly directed flange 40 at its
other 'end. The outwardly directed flange 39 is arranged within the chamber 11 and is of the circumferential
Lip 30 or any other suitable connection

narrowing at the end of the sleeve 19 secured. It can be seen that the sleeve 10 has a small shoulder 41, the
Flange 30 is held in position in the axial direction between shoulder 41 and lip 30. Due to this design, the O-ring 28 is sufficiently secured in the chamber 11 by the flange 39, so that the lip 30 can be made correspondingly smaller, ie can be produced from a tubular preform with a larger diameter.

The inner surface of the central cylindrical portion 38 determines the position of the end of the tube 24 in the radial direction, while the flange 40 the insertion of the tube in
delimits the body 18. Thus, not a part of the body 18 but the cartridge itself has the pipe stop. The stop device 37 for the pipe can be attached to the sleeve 10
be appropriate in any other appropriate manner

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for example by means of an adhesive, by fusion welding, by ultrasonic or high-frequency welding (if both the sleeve and the stop device are made of suitable materials) or by other deformation of the sleeve 10.

Cartridges with the design described above are suitable for most types of bodies, since they only require two bores, namely the bore 17 and the flow channel 33, only the bore 17 being precisely formed needs to be. Thus, the body only needs minimal machining to become one Can accommodate cartridge, which has corresponding cost savings. In addition, the cartridge can also be used in such Used in cases where it is difficult to provide a pipe stop in the body. This more precisely means that it does the cartridge according to the invention for the first time enables a releasable pipe coupling in a relatively thin-walled body, for example a tube sheet or the wall of a large container to be used, as shown in FIG. In these applications, the sleeve 10 can be provided at its right end with an outer flange to the Einfüh ren in the body to limit. In those cases where the sleeve 10 is inserted from within the body For example, in the case of the wall of a large container, the sleeve 10 can be provided with an external flange on the other End be provided so that the blowing forces are transmitted directly from the sleeve to the body. With the latter Training can significantly reduce the relative thickness of the wall of the body compared to the case shown in FIG because the outer flange makes the interference fit between the sleeve and the body unnecessary. The above described Embodiments can also be modified in that between the sleeve and the body a adhesive sealant is arranged, as described under reference

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assumed on Figure 1, or that a gasket or adhesive sealant is disposed between the outer flange and the body when the flange is within the body.
5

The cartridge shown in FIG. 4 is similar to the cartridge shown in FIG. However, she is 18 in the body screwed instead of being secured by an interference fit in this. Accordingly, the body 18 has an internal thread 42 which is in engagement with an external thread 43 on the sleeve 10. The outer end of the sleeve 10 is with a Flange 44 is provided, the outer surface of which is provided with two or more tool engagement surfaces 45, so that the sleeve 10 can be easily screwed into the body 18 by means of a wrench and tightened. The one in figure Body 18 shown in Fig. 4 is typical of a body such as is commonly found in clamp couplings for connecting two or more pipes are used, for example with straight clamping couplings, curved clamping couplings or T-couplings lungs. The assembly of a cartridge according to the invention or several cartridges according to the invention with such a body represents a simple and relatively cheap method to develop such a clamping coupling in such a way that it can releasably hold one or more pipes. Similarly, other conventional fittings with a thread can also be used be adapted in this way, for example British-Standard tubular arm doors or National-Pipe-Thread tubular arm doors. By doing the respective wall thicknesses of the sleeve 10 and the clamping ring 19 are suitably dimensioned, it is possible conventionally To equip the body of couplings or fittings so that one or more pipes through any outside with their help knife can be detachably coupled up to a specified maximum diameter.

The functioning of the pipe couplings on which the

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Finding is known to those skilled in the art. Nevertheless, it will be explained briefly below. The tube 24 that will be stiff can, but is usually flexible and made of a plastic material, is easy with the pipe coupling connected in that it is inserted into this until its inserted end at the end stop or the stop device strikes. During insertion, the elastic arms 22 due to the contact of the teeth 23 with the Tube 24 pushed outwards. When the fluid pressure in tube 24 increases or when the tube is pulled, the teeth engage more forcefully into the tube 24, as previously mentioned, so that the tube 24 is not blown out or inadvertently can be separated. However, the pipe 24 can be quickly released from the pipe coupling by pulling the flange 21 of the The clamping ring is pressed axially inwards (this prevents the clamping ring 19 from being displaced in the axial direction, so that the arms 22 cannot be pushed inwards) and by pulling the tube 24 out at the same time will.

A unitary cartridge which is used to form a releasable pipe coupling in a body 18, for example a Valve body or a manifold body or the body of a pipe fitting, by means of which two or more pipes

can be connected, can be used, comprises a sleeve 10 having an outer surface for attachment in the Body is used, a clamping ring 19 for gripping a pipe which is secured in the sleeve 10, and a sealing ring 28, which is also secured in the sleeve 19. The sleeve 10 is in the body 18 preferably by means of a clamping shoulder 15, which leads to an interference fit, and optionally additionally an adhesive sealant 34 attached or alone by means of an adhesive sealant or by means of a

Screw thread.
35

Claims (13)

Dipl.-Ing. R. Kinne Dipl.-Ing. R Group Dipl.-Ing. B. Pellmann Bavariaring 4, Postfach 202403 8000 Munich 2 Te!.: 089-5396 53 Telex: 5-24845 tipat cabie: Germaniapatent Munich j 5 July 21, 1981 DE 1379 / case 31442 TIcm-KP - BfIHLIlSiG - KlNMF patent attorneys and representatives at EPA * fiL Dip |.-Ing. H. Tiedtke Γ HUPE l ELLMANN Dipl.-Chem. G. Bühling protection claims c h e 1. Cartridge for insertion into a body to form a releasable pipe coupling, with a sleeve defining a chamber and having an outer surface which is in a bore is fixable in the body, with a clamping ring which has a substantially annular, supporting part which a plurality of substantially axially extending, spaced-apart elastic arms, each with Means for detecting the outer cylindrical surface of an inserted tube are provided, and with a Sealing ring that can interact with the outside of the pipe, with the elastic arms of the clamping ring inside the chamber are arranged so that they can come into engagement with a portion of the chamber wall in the direction of the one end of the sleeve converges so that movement of the clamping ring towards one end of the sleeve causes that the ends of the elastic arms are compressed, characterized in that that the sealing ring (28) carried from the other end of the sleeve (10) and has an annular surface which cooperates with a complementary surface (29) of the sleeve . •• - 2 - DE 1379 2. Cartridge according to claim 1, characterized in that the sealing ring (2 8) completely within the chamber (11) is arranged and in the sleeve (10) directly or is secured indirectly by a constriction (30) at the other end of the sleeve. 3. Cartridge according to claim 2, characterized in that · the constriction (30) is integral with the rest of the sleeve (10) is formed. 4. Cartridge according to claim 2 or 3, characterized in that that the other end of the sleeve (10) has a portion of reduced thickness, which is used to form a circumferential Lip (30) has been pressed inwards and thereby forms the constriction. 5. Cartridge according to one of claims 2 to 4, characterized in that the sealing ring (28) rests directly on a surface the constriction (30) that of the sleeve (10) formed chamber (11) faces. 25th 6. Cartridge according to one of claims 1 to 5, characterized in that that the other end of the sleeve (10) also has a stop device (37) for the pipe träqt. 30th 7. Cartridge according to claim 6 in conjunction with one of claims 2 to 4, characterized in that the stop device (37) for the pipe has a section (39), which is arranged in the sleeve (10) between the constriction (30) and the sealing ring (28) and is fixed by the constriction in its installation position • · · · I I - 3 - DE 1379 will hold. 8. Cartridge according to claim 6 or 7,
characterized, that the stop device (37) has a tubular section (38) which the position of the pipe in the radial direction
defined, as well as an inwardly directed flange
(40) at the end remote from the sealing ring (28) which
engages the end of the tube (24) to thereby limit the length by which the tube is inserted. . t ' 9. Cartridge according to one of claims 1 to 8, characterized in that r that the sleeve (10) at one end with an outer | Flange (44) is provided, the insertion, the sleeve!; (10) limited in the body (18). i 10. Cartridge according to one of claims 1 to 9,
characterized, that the outer surface of the sleeve (10) has at least one cut (15) on the v / eist with the wall or walls that the | Limit the bore (17) in the body (18), a tight fit? | forms. ';,' ' 11. Cartridge according to claim 10, characterized in that f that from the outside of the sleeve (10) an annular> ■ section (15) protrudes, which can form the interference fit. I I 12. Cartridge according to one of claims 1 to 11, | characterized in that the sleeve (10) has a circumferential groove (36) in its f. Has outer surface and that a sealing ring $ in the groove $ (35) sits, the outer surface of which over the outer surface f the sleeve protrudes. ί ♦ · - 4 - DE 1379 1 13. Cartridge according to one of claims 1 to 9, characterized, that the outer surface of the sleeve (10) with an outer v; inde (43) is provided with a complementary 5 internal threads (42) in the body (18) can be engaged.