FILLING HEAD

Abstract

A filling head for introducing operating fluid into an operating fluid tank of a motorized vehicle, where the filling head includes: A filling head housing, where the filling head housing exhibits a delivery-accommodation region for accommodating delivery devices, A venting structure, which during a transmission of operating fluid through the filling head housing allows transmission of gas, Where the delivery-accommodation region exhibits a plug-in nozzle extending along a virtual nozzle path with a plug-in orifice through which an accommodating space is accessible, Where in the filling head housing, at an axial magnet distance from the plug-in orifice, there is arranged a magnet arrangement, Where the venting structure includes a channel arrangement which is bounded by an inner wall of the plug-in nozzle and by an outer wall of the plug-in nozzle, wherein from the plug-in orifice as far as and into the extension region of the magnet arrangement there proceeds a gas-impermeable boundary surface which bounds the accommodating space radially outward, where a cross-sectional area enclosed by the boundary surface and orthogonal to the nozzle path is at least not larger in the extension region of the magnet arrangement than in a reference region located between the magnet arrangement and the plug-in orifice.

Claims

1-15. (canceled)

16. A filling head for introducing operating fluid into an operating fluid tank of a motorized vehicle and for venting the operating fluid tank when introducing operating fluid into it, where the filling head comprises: A filling head housing where the filling head housing exhibits a delivery-accommodation region, which is configured for temporally transient accommodation of various delivery devices, such as for instance a spigot and a storage container neck, Where the filling head housing is configured for transmitting operating fluid in a delivery sense from the delivery-accommodation region along an operating fluid delivery route to an outlet port of the filling head housing arranged in the delivery sense downstream of the delivery-accommodation region, A venting structure, which during a transmission of operating fluid through the filling head housing in the delivery sense allows a transmission of gas in a venting sense that is opposite to the delivery sense, Where the delivery-accommodation region of the filling head exhibits a plug-in nozzle extending along a virtual nozzle path with a plug-in orifice, through which an accommodating space for temporally transient accommodation of the delivery device is accessible, where the accommodating space is connected fluid-mechanically with the outlet port, Where the nozzle path defines axial directions proceeding along the nozzle path, radial directions proceeding orthogonally to it, and circumferential directions proceeding around it, Where in the filling head housing, at an axial magnet distance from the plug-in orifice, a magnet arrangement is arranged whose magnetic field acts on the operating fluid delivery route, Where the venting structure comprises a channel arrangement, which at least along an axial section of the plug-in nozzle is bounded radially inwards by an inner wall structure with an inner wall of the plug-in nozzle facing towards the accommodating space and radially outwards by an outer wall structure with an outer wall of the plug-in nozzle facing away from the accommodating space, Where from the plug-in orifice there proceeds as far as and into the axial extension region of the magnet arrangement a gas-impermeable boundary surface formed at least also by the inner wall and bounding the accommodating space radially outwards, where a cross-sectional area enclosed by the boundary surface and orthogonal to the nozzle path is at least not larger in a region of the boundary surface located in the extension region of the magnet arrangement than in a reference region located between the magnet arrangement and the plug-in orifice, where the reference region begins at an axial distance of 10% of the magnet distance from the plug-in orifice and ends at an axial distance not exceeding 50% of the magnet distance from the plug-in orifice.

17. The filling head according to claim 16, wherein the cross-sectional area is smaller in the extension region of the magnet arrangement than in the reference region.

18. The filling head according to claim 17, wherein in the extension region of the magnet arrangement there is provided a sealing structure projecting radially inward towards the nozzle path and encircling the nozzle path.

19. The filling head according to claim 16, wherein in the extension region of the magnet arrangement there is provided a sealing structure projecting radially inward towards the nozzle path and encircling the nozzle path.

20. The filling head according to claim 16, wherein at least one section of the inner wall structure of the plug-in nozzle is configured integrally with at least one section of the outer wall structure of the plug-in nozzle.

21. The filling head according to claim 16, wherein at least one section of the inner wall structure of the plug-in nozzle is configured as a separate inner wall component separate from at least one section of the outer wall structure of the plug-in nozzle.

22. The filling head according to claim 21, wherein in the filling head housing, in the region between the magnet arrangement and the outlet port, there is arranged a flow-guiding component with a flow-guiding wall proceeding along the operating fluid delivery route, where the inner wall structure is configured integrally with the flow-guiding component.

23. The filling head according to claim 22, wherein in the extension region of the magnet arrangement there is provided a sealing structure projecting radially inward towards the nozzle path and encircling the nozzle path and wherein the sealing structure is configured integrally with the inner wall structure of the plug-in nozzle, or that the sealing structure is configured at a sealing component configured separately from the plug-in nozzle.

24. The filling head according to claim 20, wherein in the extension region of the magnet arrangement there is provided a sealing structure projecting radially inward towards the nozzle path and encircling the nozzle path and wherein the sealing structure is configured integrally with the inner wall structure of the plug-in nozzle, or that the sealing structure is configured at a sealing component configured separately from the plug-in nozzle.

25. The filling head according to claim 23, wherein the sealing structure is formed by a sealing lip projecting radially inward or by a vertex section projecting radially inward of a bellows structure.

26. The filling head according to claim 19, wherein the sealing structure is formed by a sealing lip projecting radially inward or by a vertex section projecting radially inward of a bellows structure.

27. The filling head according to claim 16, wherein a structure section connected with the inner wall structure of the plug-in nozzle extends over the entire axial length of the magnet arrangement.

28. The filling head according to claim 27, wherein the structure section embraces the magnet arrangement at least at one axial longitudinal end of the magnet arrangement.

29. The filling head according to claim 16, wherein the plug-in nozzle exhibits in the region of the plug-in orifice a front surface surrounding the plug-in orifice, where the channel arrangement leads into the front surface.

30. The filling head according to claim 16, wherein the channel arrangement at an axial distance from the plug-in orifice leads into an outer wall formed by the outer wall structure of the plug-in nozzle.

31. The filling head according to claim 16, wherein at the outer wall structure of the plug-in nozzle there is provided an outer thread.

32. The filling head according to claim 31, wherein the outer thread is configured to interact with an inner thread of at least one filling head cap covering the delivery device for its positional stabilization at the plug-in nozzle and/or with a filling head cap covering the plug-in orifice.

33. The filling head according to claim 32, wherein the channel arrangement at an axial distance from the plug-in orifice leads into an outer wall formed by the outer wall structure of the plug-in nozzle and wherein at the base of the outer thread there is provided at least one opening, by means of which the channel arrangement leads into the outer wall.

34. The filling head according to claim 16, wherein the channel arrangement is connected fluid-mechanically only radially outside past the magnet arrangement with an inner volume of the filling head housing located on the side of the magnet arrangement facing towards the outlet port.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The invention may take physical form in certain parts and arrangement of parts, a preferred embodiment of which will be described in detail and illustrated in the accompanying drawings which forms a part hereof and wherein:

[0055] FIG. 1 A rough schematic longitudinal section view of a first embodiment of a filling head of the present invention,

[0056] FIG. 2 A rough schematic longitudinal section view of an inlet region of a second embodiment of a filling head of the present invention,

[0057] FIG. 3 A rough schematic longitudinal section view of an inlet region of a third embodiment of a filling head of the present invention,

[0058] FIG. 4 A rough schematic longitudinal section view of an inlet region of a fourth embodiment of a filling head of the present invention,

[0059] FIG. 5 A rough schematic longitudinal section view of an inlet region of a fifth embodiment of a filling head of the present invention,

[0060] FIG. 6 A rough schematic longitudinal section view of an inlet region of a sixth embodiment of a filling head of the present invention,

[0061] FIG. 7 A rough schematic longitudinal section view of an inlet region of a seventh embodiment of a filling head of the present invention, and

[0062] FIG. 8 A rough schematic longitudinal section view of an inlet region of an eighth embodiment of a filling head of the present invention,

DESCRIPTION OF PREFERRED EMBODIMENTS

[0063] Referring now to the drawings wherein the showings are for the purpose of illustrating preferred and alternative embodiments of the invention only and not for the purpose of limiting the same, FIG. 1 depicts in rough schematic form a first embodiment of a filling head of the present application in longitudinal section, labeled generally as 10. The filling head exhibits a filling head housing 12, which in the present example consists of three housing components 14, 16, and 18 jointed with one another. The housing components 14, 16, and 18 are made of a thermoplastic synthetic by injection molding and are welded or glued with one another at their connecting regions facing towards each other. The synthetic material of at least one housing component 14, 16, and 18, preferably of all housing components 14, 16, and 18, can be filled, for example with glass fibers, in order to increase the strength of the synthetic and thus of the respective housing component.

[0064] The filling head housing 12 exhibits a main body 20, from which a plug-in nozzle 22 projects along a virtual nozzle path S forming a straight nozzle axis. The main body 20 surrounds a main volume 24 of the filling head housing 12. In the main volume 24 at its inlet-side end there is arranged a preferably annular permanently magnetized magnet arrangement 26.

[0065] In the main volume 24 on the side of the magnet arrangement 26 which in operation is nearer the tank there is arranged a flow-guiding component 28. The flow-guiding component 28 can contribute to the axial, where applicable also to the radial fixing of the magnet arrangement 26 in the main volume 24. The flow-guiding component 28 is clipped, welded, or glued with the housing component 14.

[0066] The nozzle path S defines axial directions a1 and a2, radial directions r1, r2, and circumferential directions u1 and u2.

[0067] The plug-in nozzle 22 exhibits a plug-in orifice 30, through which an accommodating space 32 surrounded radially outside both by the plug-in nozzle 22 and by the magnet arrangement 26 is accessible. The magnet arrangement is situated at a magnet distance m from the plug-in orifice 30.

[0068] The plug-in nozzle 22 exhibits at its outer wall structure 22a, which is formed by the housing component 14 and configures an outer wall facing away from the accommodating space 32, an outer thread 34. The outer thread 34 extends, starting from an end surface 20a which forms a tank-remote longitudinal end of the main body 20 of the filling head housing 12, over more than half of the axial length of the plug-in nozzle 22. Alternatively, the outer thread can begin only at a distance from the end surface 20a and accordingly exhibit fewer turns.

[0069] Between its outer wall structure 22a and its inner wall structure 22b that configures an inner wall, there is configured at the plug-in nozzle a channel arrangement 36 which reaches in the plug-in nozzle 22 in the axial direction up to an end wall 22c which surrounds the plug-in orifice and there in at least one opening 38, preferably in a plurality of openings 38, leads to the external environment U.

[0070] For better understanding, FIG. 1 depicts a union coupling 40 with an inner thread 42 configured therein screwed together with the outer thread 34. The union coupling 40 is part of a storage container neck that is to be emptied manually through the filling head 10. A ready-for-delivery neck 44 of the storage container, to which the union coupling 40 also belongs, is indicated in rough schematic form in FIG. 1 by a dotted line in the accommodating space 32.

[0071] Just like the union coupling 40, a cap embracing the plug-in nozzle 22 outside can be secured by being screwed on detachably on the outer thread 34.

[0072] A ready-for-delivery spigot 46 arranged in the accommodating space 32 is depicted by a dotted line in rough schematic form, in comparison with a ready-for-delivery neck 44 as a possible further delivery device. The spigot 46 extends along the nozzle path S from the plug-in orifice 30 beyond the axial position of the magnet arrangement 26, such that it is ensured that the magnetic field produced by the magnet arrangement 26 can act on a valve device arranged in the spigot 46, in order to open it automatically for the passage of operating fluid given proper arrangement of the spigot 46 in the delivery-accommodation region 48 of the filling head 10. Naturally, only either one neck 44 or one spigot 46 at a time can be accommodated as a delivery device in the accommodating space 32.

[0073] Quite fundamentally, the accommodating space 32 and the main volume 24 define a delivery route 50 inside the filling head 10, through which during a delivery process there flows operating fluid dispensed by a ready-for-delivery delivery device 44 or 46, in the delivery sense L in the direction from the plug-in orifice 30 towards the outlet port 52. The gas displaced during the delivery process from the tank T connected to the filling head 10 by the operating fluid flowing in the delivery sense L, flows in contrast through the filling head 10, i.e. at least through a section of the main volume 24 and the channel arrangement 36, in a venting sense E opposite to the delivery sense L. The tank T is depicted in rough schematic form only in FIG. 1, solely for the sake of completeness.

[0074] To the outlet port 52 there links a filling line 53, which connects the outlet port 52 with the tank T.

[0075] The flow-guiding component 28 which follows the magnet arrangement 26 in the delivery sense L, serves particularly for conducting in the delivery sense L operating fluid dispensed by the delivery device 44 or 46 through the filling head 10. However, the flow-guiding component 28 exhibits for the venting of the tank T which is connected fluid-mechanically with the filling head 10 at least one opening 54 penetrating through the flow-guiding component 28 and its flow-guiding surface 28c, such that sections of the main volume 24 outside the flow-guiding component 28 are also reached by operating fluid during a delivery process and consequently can be part of the delivery route 50.

[0076] The filling head 10 exhibits a venting line 58, which comes out of the housing component 16. Alternatively, the venting line 58 can also come out of the housing component 14 or a section of the venting line 58 coming out of the main body 20 can be configured in complementary parts through both housing components 14 and 16. In the housing component 16, the venting line 58 leads into the main volume 24. Through the at least one opening 54 in the flow-guiding component 28, displaced gas flowing via the venting line 58 into the main volume 24 can reach the inner flow volume 28a of the flow-guiding component 28 located inside the flow-guiding surface 28c. As a result, pressure equalization between the flow volume 28a and the part of the main volume 24 surrounding the flow-guiding component 28 can be achieved.

[0077] In the depicted first embodiment example of FIG. 1, the inner wall structure 22b of the plug-in nozzle 22 is configured at the inner wall component 18, which is fabricated physically separate from the housing component 14 forming the outer wall structure 22a with the outer wall of the plug-in nozzle 22. At the housing component 14 and/or at the inner wall component 18 there can be formed ribs projecting radially inward and/or radially outward respectively, which position the inner wall component 18 radially relative to the housing component 14, i.e. in particular center it relative to the outer wall structure 22a, and which subdivide the channel arrangement 36 into a plurality of single channels following each other in the circumferential direction around the nozzle path S.

[0078] The channel arrangement 36 exhibits a total cross-sectional area of preferably between 110 and 130 mm.sup.2, in order to be able to guarantee venting of the tank T during a delivery process with a volume flow of 20 to 40 l/min of operating fluid in the delivery direction L.

[0079] Between the inner wall component 18 and the magnet arrangement 26 there is arranged a sealing component 60. The sealing component 60 abuts gap-free on a support structure 18a configured integrally at the inner wall component 18 as an encircling radial projection. The support structure 18a forms an axial end stop of the magnet arrangement 26, which physically prevents the magnet arrangement 26 approaching the plug-in orifice 30.

[0080] Likewise, at the flow-guiding component 28 there can be configured a support section 28b, once again as an encircling radial projection, which forms a physical barrier to movement of the magnet arrangement 26 towards the outlet port 52. The magnet arrangement 26 can therefore be fixed in its axial mobility by the support structures 18a and 28b, where applicable with an intermediate arrangement of the sealing component 60.

[0081] Likewise, the sealing component 60 abuts gap-free on the front surface of the magnet arrangement 26 facing towards the plug-in orifice 30.

[0082] From the sealing component 60 there protrudes a sealing lip 60a into the accommodating space 32. The sealing lip 60a located in the axial extension region of the magnet arrangement 26 exhibits a cross-sectional area Q1 orthogonal to the nozzle path S, which is smaller than the cross-sectional areas of the delivery devices 44 and 46 in the sections which with a ready-for-delivery delivery device 44 and/or 46 respectively arranged in the accommodating space 32 are arranged at the axial arrangement location of the sealing lip 60a. The sealing lip 60a, therefore, seals in the region of the longitudinal extension of the magnet arrangement 26 along the nozzle path S a gap space G which is present between the delivery device 44 and/or 46 respectively and the structure of the filling head 10 which surrounds the delivery device 44 and/or 46 respectively radially outside towards the plug-in orifice 30.

[0083] The inner wall 62a of the plug-in nozzle 22 and the surface 62b facing towards the nozzle path S of the section of the sealing component 60 exhibiting the sealing lip 60a and protruding into the accommodating space 32 form together a closed gas-impermeable boundary surface 62 bounding the accommodating space 32 radially outwards.

[0084] The cross-sectional area Q1 is here smaller than the cross-sectional area Q2 in the reference region 64, which begins at a distance of 10% of the magnet distance m from the plug-in orifice 30 and ends at a distance of for example 30% of the magnet distance m from the plug-in orifice 30.

[0085] The larger cross-sectional area Q2 guarantees that a delivery device 44 and/or 46 respectively can be introduced comfortably through the plug-in orifice 30 into the accommodating space 32. The smaller cross-sectional area Q1 guarantees the sealing of the gap space G described above.

[0086] Venting of the gas displaced from the tank T during a delivery process takes place, therefore, exclusively via the channel arrangement 36, to with radially outside past the magnet arrangement 26 in an annular chamber 66 between the section of the housing component 14 forming the outer wall structure 22a of the plug-in nozzle 22 and the support structure 18a of the inner wall component 18, from where the channel arrangement 36 proceeds through the material of the plug-in nozzle 22 up to its opening 38.

[0087] FIG. 2 depict in rough schematic form a second embodiment of the invention's filling head 110 in longitudinal section. Identical and functionally identical components and component sections as in the first embodiment are labeled in the second embodiment with identical reference labels, but increased numerically by 100. The second embodiment shall be described hereunder only in so far as it differs from the first embodiment, to whose description otherwise reference is made expressly also for elucidating the second embodiment.

[0088] The second embodiment exhibits, configured integrally with the inner wall structure 122b, a structure section 168 in the form of a bellows structure protruding from the inner wall structure 122b in the direction away from the plug-in orifice 130. An encircling bellows vertex 168a, which connected the conical bellows folds 168b and 168c with one another, forms a constriction of the conducting route 150 with a narrowest cross-section with the cross-sectional area Q1. The cross-sectional areas Q1 of the first and the second embodiment do not have to match quantitatively.

[0089] The structure section 168 proceeds completely radially inside through the magnet arrangement 126 and engages it behind on its side which faces towards the outlet port with detents 168d. The magnet arrangement 126 can thus be held positively in a locked engagement between the support structure 118a and the detents 168d at the inner wall component 118. The structure section 168 completely screens the radially inner side of the magnet arrangement 126 physically.

[0090] Unlike the depiction in FIG. 2, the region of the structure section 168 carrying the detents 168d can be slotted and/or segmented respectively, in order to provide radial mobility of the detents 168d in such a way that they can be displaced radially inward by the material of the magnet arrangement 126 against their material prestressing for the arrangement of the magnet arrangement 126.

[0091] Since the sealing structure is formed by the bellows vertex 168a, a separate sealing component can be dispensed with in the second embodiment.

[0092] FIG. 3 depicts in rough schematic form a third embodiment of the invention's filling head 210 in longitudinal section. Identical and functionally identical components and component sections as in the first and second embodiments are labeled in the third embodiment with identical reference labels, but increased numerically by 200 or 100, respectively. The third embodiment shall be described hereunder only in so far as it differs from the first two embodiments, to whose description otherwise reference is made expressly also for elucidating the third embodiment.

[0093] In the third embodiment, similarly to the first embodiment, a sealing lip 260a is configured at the inner wall component 218. In contrast to the first embodiment, the sealing lip 260a is configured integrally with the inner wall component 218, in particular with the support section 218a, and is fabricated by injection molding together with the inner wall component 218.

[0094] Like the second embodiment, the inner wall component 218a also exhibits a structure section 268 proceeding past the magnet arrangement 226 over the entire axial extension of the magnet arrangement 226. In contrast to the second embodiment, however, the structure section 268 proceeds radially outside past the magnet arrangement 226 and encloses it. In the circumferential direction the structure section 268 is segmented in order to provide adequate elastic mobility of the detents 268d, such that on the arrangement of the magnet arrangement 226 at the structure section 268 they can be displaced radially outward by the magnet arrangement 226 against their material prestressing.

[0095] FIG. 4 depicts in rough schematic form a fourth embodiment of the invention's filling head 310 in longitudinal section. Identical and functionally identical components and component sections as in the first three embodiments are labeled in the fourth embodiment with identical reference labels, but increased numerically by 300 or 200 or 100, respectively. The fourth embodiment shall be described hereunder only in so far as differs from the first three embodiments, to whose description otherwise reference is made expressly also for elucidating the fourth embodiment.

[0096] The fourth embodiment of FIG. 4 corresponds essentially to the third embodiment of FIG. 3, with the exception that the inner wall component 318 does not exhibit a structure section. The magnet arrangement 326 is therefore neither radially inside nor radially outside penetrated and/or surrounded by a support section. The magnet arrangement 326 can then be fixed axially between the support structures 318a and 328b (not depicted).

[0097] In other words: The fourth embodiment of FIG. 4 corresponds essentially to the first embodiment of FIG. 1, with the difference that the sealing lip 360a is configured integrally with the inner wall component 118.

[0098] FIG. 5 depicts in rough schematic form a fifth embodiment of the invention's filling head 410 in longitudinal section. Identical and functionally identical components and component sections as in the first four embodiments are labeled in the fifth embodiment with identical reference labels, but increased numerically by 400 or 300 or 200 or 100, respectively. The fifth embodiment shall be described hereunder only in so far as it differs from the first four embodiments, to whose description otherwise reference is made expressly also for elucidating the fifth embodiment.

[0099] The fifth embodiment in FIG. 5 corresponds essentially to the first embodiment of FIG. 1, with the first exception that the inner wall structure 422b is formed integrally connected with the outer wall structure 422a. An inner wall component configured separately from the rest of the plug-in nozzle, therefore, is not present.

[0100] Because of the one-piece configuration of the entire plug-in nozzle 422, the inner wall structure 422b of the plug-in nozzle 422 forming the inner wall does not exhibit a support structure projecting radially outward against which the magnet arrangement 426 could abut two-dimensionally. Such a design would probably not be demoldable.

[0101] The separately configured sealing component 460 with the sealing lip 460a configured thereon is supported on the end face of the magnet arrangement 426 facing towards the plug-in orifice 430 and is supported in the opposite direction by the inner end face facing towards the magnet arrangement 426 of the inner wall structure 422b forming the inner wall. The sealing component 460 can exhibit a corresponding recess 460b, into which the inner end face of the inner wall structure 422b forming the inner wall dips.

[0102] The channel arrangement 436 does not extend up to the end wall 422c of the plug-in nozzle 422, but instead ends as an annular blind recess in the material of the plug-in nozzle 422 axially between the end wall 422c and the outer thread 434. The axial depth of the extension of the channel arrangement 436 can differ from the depiction in FIG. 5 and can in particular be shorter, i.e. for example end in the region of the outer thread 434 or at the longitudinal end of the outer thread 434 located nearer to the plug-in orifice 430.

[0103] For venting, radial openings 470 are provided which extend from the base of the outer thread 434 to the channel arrangement 436, thus connecting the channel arrangement 436 with the external environment U. At the outer wall of the plug-in nozzle 422 there is a larger area available for connecting the channel arrangement 436 with the external environment U than at the end wall 422c. A cap screwed onto the outer thread 434 closes off the radial openings 470, thus protecting the content of the tank T against gradually drying out through the venting structure, comprising the venting line 58, the main volume 424, the annular chamber 466, the channel arrangement 436, and the radial openings 470.

[0104] FIG. 6 depicts in rough schematic form a sixth embodiment of the invention's filling head 510 in longitudinal section. Identical and functionally identical components and component sections as in the first five embodiments are labeled in the sixth embodiment with identical reference labels, however increased numerically by 500 or 400 or 300 or 200 or 100, respectively. The sixth embodiment shall be described hereunder only in so far as it differs from the first five embodiments, to whose description otherwise reference is made expressly also for elucidating the sixth embodiment.

[0105] In the sixth embodiment, the inner wall structure 522b exhibiting the inner wall of the plug-in nozzle is formed by an inner wall component configured separately from the housing component 514 forming the outer wall structure 522a with the outer wall. The inner wall component is here the flow-guiding component 528.

[0106] Although a sealing structure can be configured at the the flow-guiding component 528 in the axial extension region of the magnet arrangement 526, for example through two-component injection molding, in the present embodiment example the inner wall structure 522b is so configured that the cross-sectional area Q1 is quantitatively and shape-wise approximately equal to the cross-sectional area Q2, such that the cross-sectional area Q1 is at least no greater than the cross-sectional area Q2. Given an appropriate radial measurement of the inner wall, there remains at the delivery device accommodated in the accommodating space 532 a radial gap not exceeding 0.5 mm gap width. In reality, this gap width is too small for venting flow to be able develop during a delivery process in the gap thus configured. The flow resistance in the narrow gap space is so much greater than in the channel arrangement 536, that in effect there is sealing of the accommodating space 532 in the axial extension region of the magnet arrangement 526.

[0107] As in the preceding and following embodiments also, the channel arrangement is the only flow connection with the external environment U for displaced gas.

[0108] The magnet arrangement 526 can, before mounting the plug-in nozzle, be slipped over the tubular inner wall structure 522b, which at its inner side forms the inner wall of the plug-in nozzle 522. The inner wall structure 522b centers the magnet arrangement 526. The support structure 528b forms an end stop for the magnet arrangement 526 and positions it axially.

[0109] FIG. 7 depicts in rough schematic form a seventh embodiment of the invention's filling head 610 in longitudinal section. Identical and functionally identical components and component sections as in the first six embodiments are labeled in the seventh embodiment with identical reference labels, but increased numerically by 600 or 500 or 400 or 300 or 200 or 100, respectively. The seventh embodiment shall be described hereunder only in so far as it differs from the first six embodiments, to whose description otherwise reference is made expressly also for elucidating the seventh embodiment.

[0110] The seventh embodiment largely corresponds to the fifth embodiment of FIG. 5, with the difference that the channel arrangement 636 also leads into openings 638 in the end wall 622c. The radial openings 670 are additionally available. A cap screwed onto the plug-in nozzle can close off both the radial openings 76 and the openings 638 in the end wall 620c.

[0111] FIG. 8 depicts in rough schematic form an eighth embodiment of the invention's filling head 710 in longitudinal section. Identical and functionally identical components and component sections as in the first seven embodiments are labeled in the eighth embodiment with identical reference labels, but increased numerically by 700 or 600 or 500 or 400 or 300 or 200 or 100, respectively. The eighth embodiment shall be described hereunder only in so far as it differs from the first seven embodiments, to whose description otherwise reference is made expressly also for elucidating the eighth embodiment.

[0112] The closest to the eighth embodiment is the seventh embodiment of FIG. 7. Once again, the inner wall structure 722b implementing the inner wall is configured integrally at the housing component 714 with the outer wall structure 722a implementing the outer wall.

[0113] Unlike the seventh embodiment, the eighth embodiment does not comprise a sealing component. As in the sixth embodiment of FIG. 6, the inner wall structure 722b forming the inner wall proceeds radially inside through the magnet arrangement 726 axially up to the end face of the magnet arrangement facing towards the outlet port. As in the sixth embodiment, the cross-sectional areas Q1 and Q2 of the eighth embodiment are approximately equal in size. The discussion regarding the blocking of venting flow in the gap space between a delivery device and the structure with the boundary surface 562 radially opposite the delivery device in the context of the sixth embodiment, applies unchanged to the gap space between a delivery device introduced into the accommodating space 732 and the inner wall radially opposite to it in the eighth embodiment.

[0114] While considerable emphasis has been placed on the preferred embodiments of the invention illustrated and described herein, it will be appreciated that other embodiments, and equivalences thereof, can be made and that many changes can be made in the preferred embodiments without departing from the principles of the invention. Furthermore, the embodiments described above can be combined to form yet other embodiments of the invention of this application. Accordingly, it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.