DISPENSING APPARATUS, DISPENSING SYSTEM AND METHOD OF DISPENSING

Abstract

A dispensing apparatus includes a body, two inlets for flowable masses and two outlets through which the flowable masses can be dispensed, with one inlet being connected to one outlet and the other inlet being connected to the other outlet through the body. The two inlets are spaced apart from one another by a first spacing and the two outlets are spaced apart from one another by a second spacing, and with the second spacing being larger than the first spacing. A connection ring engages the body and is pre-mounted to the body. The dispensing apparatus is configured to be non-releasably connected to a two-component cartridge via the connection ring for the supply of the flowable masses to the inlets.

Claims

1. A dispensing apparatus, comprising: a body, first and second inlets for flowable masses and first and second outlets through which the flowable masses are capable of being dispensed, with the first inlet being connected to the first outlet and the second inlet being connected to the second outlet through the body, the first and second inlets being spaced apart from one another by a first spacing and the first and second outlets being spaced apart from one another by a second spacing, the second spacing being larger than the first spacing; and a connection ring configured to engage the body and being pre-mounted at the body, the dispensing apparatus being configured to be non-releasably connected to a two-component cartridge via the connection ring for the supply of the flowable masses to the inlets.

2. The dispensing apparatus in accordance with claim 1, further comprising a closure cap configured to cover the first and second outlets.

3. The dispensing apparatus in accordance with claim 2, wherein the closure cap is configured to engage the body in one orientation only.

4. The dispensing apparatus in accordance with claim 2, wherein the closure cap comprises a flexible portion configured to engage the dispensing apparatus and to thereby ensure a connection between the closure cap and the dispensing apparatus.

5. The dispensing apparatus in accordance with claim 2, wherein the closure cap and the dispensing apparatus comprise coded alignment system configured to enable coded alignment of the closure cap and the dispensing apparatus.

6. The dispensing apparatus in accordance with claim 2, wherein the closure cap includes passages which extend the first and second outlets of the dispensing apparatus within the closure cap.

7. The dispensing apparatus in accordance with claim 1, wherein a length of the outlets of the dispensing apparatus is longer than a length of the outlets of the cartridge.

8. The dispensing apparatus in accordance with claim 1, wherein the pre-mounting of the connection ring at the body is caused by a frictional engagement between the connection ring and the body.

9. The dispensing apparatus in accordance with claim 1, wherein the connection between the dispensing apparatus and the two-component cartridge is caused by at least one of a latching to and a rotation of the dispensing apparatus relative to the two-component cartridge.

10. The dispensing apparatus in accordance with claim 1, wherein the pre-mounted connection ring is non-releasably connected to the body following a rotation of the connection ring relative to the body, or the non-releasable connection between the pre-mounted connection ring and the body is caused by an axial displacement of the connection ring in a direction disposed opposite of the outlets and by a rotation of the connection ring relative to the body.

11. The dispensing apparatus in accordance with claim 1, wherein the connection ring is configured to engage the body and the two-component cartridge, and the engagement at the body is at a shoulder of the body.

12. The dispensing apparatus in accordance with claim 11, wherein the connection ring is configured to engage the two-component cartridge after rotation relative to the body and the first and second inlets.

13. The dispensing apparatus in accordance with claim 11, wherein the connection between the connection ring and the two-component cartridge is configured to be caused by respective bayonet attachment device connecting the connection ring and the body to the two-component cartridge.

14. The dispensing apparatus in accordance with claim 11, wherein the body further a comprises locking device to lock the connection ring to the body once the connection between the connection ring and the two-component cartridge has been established to form a non-releasable connection.

15. The dispensing apparatus in accordance with claim 8, further comprising a system for coded alignment of the dispensing apparatus relative to the two-component cartridge.

16. A dispensing system comprising the dispensing apparatus in accordance with claim 1 and a two-component cartridge, with the two-component cartridge being capable of being filled with two flowable masses.

17. A method of dispensing flowable masses from the dispensing system in accordance with claim 16, wherein the method comprises dispensing the flowable masses from the dispensing system and a subsequent mixing of the flowable masses by hand.

18. The dispensing apparatus in accordance with claim 5, wherein the coded alignment system is formed by at least one nose and at least one corresponding groove which are configured to cooperate with one another, the at least one nose is disposed at one of the closure cap and the dispensing apparatus and the groove is disposed at the other of the dispensing apparatus and the closure cap, and the at least one nose is configured to be inserted into the at least one groove.

19. The dispensing apparatus in accordance with claim 1, wherein the dispensing apparatus extends a length of the first and second outlets of the cartridge, when mounted at the cartridge.

20. The dispensing apparatus in accordance with claim 8, wherein at least one portion is disposed at the connection ring that is configured to cause frictional engagement between the body and the connection ring to establish the pre-mounting.

21. The dispensing apparatus in accordance with claim 20, wherein the at least one portion is a prevention device configured to prevent the first and second inlets of the body from being axially moved in a direction opposite to an insertion direction.

22. The dispensing apparatus in accordance with claim 14, wherein the locking device includes elastic arms configured to engage into respective recesses disposed at the connection ring.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Referring now to the attached drawings which form a part of this original disclosure.

[0055] FIG. 1 is an exploded view of the components of a dispensing system;

[0056] FIG. 2 is a section through the assembled dispensing system of FIG. 1;

[0057] FIGS. 3A-3C are views of a body (FIGS. 3A and 3B) and a section through the body (FIG. 3C);

[0058] FIGS. 4A-4B are views of a connection ring;

[0059] FIGS. 5A-5D are views of a dispensing apparatus (FIGS. 5A & 5B), a section through the dispensing apparatus of FIG. 5B (FIG. 5C) and a view of the closure cap (FIG. 5D); and

[0060] FIGS. 6A-6D are sections of the dispensing system from above in different positions of use.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0061] Features which have the same or a similar function will be described in the following using the same reference numeral. It is also understood that the description given with respect to reference numerals used in one embodiment also applies to the same reference numerals in connection with other embodiments unless something is stated to the contrary.

[0062] FIG. 1 shows an exploded view of the components of a dispensing system 10. The dispensing system 10 comprises a closure cap 12, a dispensing apparatus 14 and a two-component cartridge 16. As can be seen, the dispensing apparatus 14 comprises a body 18 as well as a connection ring 20. The body 18 has two inlets 22a, 22b for flowable masses which are connectable to outlets 24a, 24b of the two-component cartridge 16. The body also has two outlets 26 through which the flowable masses can be dispensed. The one inlet 22a can be connected to the one outlet 24a of the two-component cartridge 16 and the other inlet 22b can be connected to the other output 24b of the two-component cartridge 16. Thus, the dispensing apparatus 14 is adapted to be connected to a two-component cartridge 16 for the supply of the flowable masses to the inlets 22a, 22b of the dispensing apparatus 14.

[0063] In a storage state and/or in a transport state the closure cap 12 simply fits on the outlets 26 of the dispensing apparatus 14 and thus seals the outputs 26 of the dispensing apparatus 14 from the outside.

[0064] The two-component cartridge 16 shown in FIG. 1 has two chambers 28a, 28b to store two respective components of e.g. a two-component adhesive. At the end 30 of the cartridge 16, where the outlets 24a, 24b from the cartridge 16 can be seen the cartridge 16 is equipped with attachment means, such as bayonet prongs 32 which are adapted to cooperate with corresponding bayonet lugs 50 (see FIG. 4) of the dispensing apparatus 14. Moreover, the two-component cartridge can comprise a cutout 34 which can interact with a corresponding nose 48 (see FIG. 4A) as a coded alignment means.

[0065] The two-component cartridge 16 shown here can be configured like the component cartridge disclosed in EP 0 730 913, whose contents is hereby included by reference. Corresponding markings can be provided at the dispensing apparatus 14 in order to ensure that this is correctly installed at the cartridge (see the bottom view of FIG. 4A). This in particular ensures that a cross-contamination between the cartridge 16 and the dispensing apparatus 14 cannot occur if the dispensing apparatus 14 is used for multiple applications.

[0066] The cartridge 16 illustrated in FIG. 1 is a so-called 1:1 cartridge 16, but can easily be replaced by 2:1, 4:1 and 10:1 cartridges in dependence on the desired use of the materials stored in the cartridge and the desired application.

[0067] FIG. 2 shows a section through the assembled dispensing system 10 of FIG. 1. As can clearly be seen there is a direct connection between passages 36 of the closure cap 12 which are adapted to receive the outlets 26 of the body 18 and the outlets 24a, 24b of the cartridge 16 when the dispensing system 10 is assembled. This direct connection permits the dispensing of the flowable masses possibly present in a cartridge 16 from the cartridge 16 through the dispensing apparatus 14 out of the outlets 26 of the dispensing system 10 on an application of a plunger (not shown). The plunger is generally used to dispense the flowable masses from the two-component cartridge 16.

[0068] FIG. 3A shows a view of the body 18 of a dispensing apparatus 14. The body 18 has two outlets 26, two inlets 22a, 22b (of which only one 22a is shown in this example). At the center of the body 18, a groove 38 can be seen which is adapted to cooperate with a corresponding nose of a closure cap 12 (see FIG. 5D with respect to the closure cap 12). The inlets 22a, 22b of the body 18 are spaced apart from one another by a first spacing and the two outlets 26 are spaced apart from one another by a second spacing, with the second spacing being larger than the first spacing. The body 18 is adapted at its end comprising the inlets 22a, 22b to be connected to a two-component cartridge 16 for the supply of flowable masses.

[0069] FIG. 3B shows a bottom view of the body 18, shoulders 40 can be seen which cooperate with the connection ring 16 (see FIG. 4B for the corresponding counter parts). As can also be seen at the lower end of the body 18 there are elastic arms 42 which extend outwardly and which are adapted to engage corresponding cutouts 54 of the connection ring 20 (see FIG. 4B). This engagement taking place once the apparatus has been placed on the cartridge 16 and the connection ring 20 has been rotated into the final position. These elastic arms 42 are provided such that the dispensing apparatus 14 cannot be removed from the cartridge 16. This means that bodies having such elastic arms 42 are generally only used with one cartridge 16. Nevertheless, these elastic arms 42 do not have to be provided, so that the dispensing apparatus 14 can be used a multiple of times with a variety of different cartridges 16.

[0070] Also shown are noses 44a (see FIGS. 3A to 3C), and 44b (see FIG. 3C), as well as a web 45 (see FIGS. 3B and 3C) which act as an axial abutment of the body 18 relative to the cartridge 16 when the body 18 is placed onto the cartridge, this means that the noses 44a, 44b and the web 45 define a maximum insertion length which the inlets 22a, 22b of the body 18 can be inserted into the outlets 24a, 24b of an associated cartridge 16.

[0071] FIG. 3C shows a section through the body 18 of FIG. 3A. The groove 38 of the body 18 forms an internal coded alignment means for indicating how the closure cap 12 can be installed at the dispensing apparatus 14. Moreover, two passages 46 present within the body 18 which connect the inlets 22a, 22b of the body 18 to the outlets of the body 18 can be seen. In this example, the passages 46 are of essentially Z-shape. Curved passages or passages of a different kind of shape could also be provided, as long as the shape of the passages 46 ensures that the inlets 22a, 22b are spaced apart from one another by a first spacing and the two outlets 26 are spaced apart from one another by a second spacing with the second spacing being larger than the first spacing.

[0072] FIGS. 3A and 3B show that the two outlets 26 and the two inlets 22a, 22b (of which only one 22a is shown in this example) have a generally tubular form and have a generally circular outlet opening respectively a circular inlet opening. The tubular parts forming the outlets 26 of the dispensing apparatus 14 project beyond the body 18 of the dispensing apparatus 14 to facilitate a dispensing therefrom.

[0073] In an exemplary embodiment it is preferred if the tubular outlets 26 project beyond the body 18 (see e.g. FIG. 3C in this regard), by up to 20 to 30% of the length of the body 18.

[0074] In accordance with FIG. 3C one can see that a diameter of the flow path between the inlets 22a, 22b and the outlets 26 of the dispensing apparatus 14 is at least substantially the same over the length of the outlet path. In particular, the diameter of the flow path is the same between the inlet opening and the outlet opening over the length of the outlet path.

[0075] Moreover, in the embodiment shown in FIG. 3C both the inlets 22a, 22b and the outlets 26 project from the body 18, wherein the inlets 22a, 22b project less far from the body than the outlets 26 of the dispensing apparatus 14.

[0076] In this connection it must be noted that the outlets 26 have a certain length and diameter and in the present example have a tubular shape with a circular outlet opening at one end thereof. Moreover, the inlets 22a, 22b also have a certain length and diameter and in the present example have a tubular shape with a circular inlet opening at one end thereof.

[0077] Both the inlets 22a, 22b and the outlets 26 are present at the body 18 of the dispensing apparatus 14. The outlets 26 are present at the body 18 at two opposite sides of the body 18, whereas the inlets 22a, 22b are present at the body 18 at an end face thereof.

[0078] Moreover, the openings of the outlets 26 open at least substantially in parallel to the longitudinal axis of the body 18, this means that a substance present in a cartridge 16 attached to the dispensing apparatus 14 can be dispensed in the same direction as the pistons (not shown) of the cartridge 16 are moved to dispense a substance present therein.

[0079] FIGS. 4A and 4B show bottom and top views of the connection ring 20 of the dispensing apparatus 14. The bottom view of FIG. 4A shows the bayonet connection device which comprises two bayonet lugs 50 which are adapted to cooperate with corresponding bayonet connection device 32 provided at the cartridge 16.

[0080] Also shown is a projection 52, which acts as an external coded alignment device for a coded alignment of the closure cap 12 with respect to the dispensing apparatus 14. Further cutouts 54 are seen in the connection ring 20 which facilitate the axial movement of the connection ring 20 relative to the body 18 on an installation of the connection ring 20 at the body 18 to form a dispensing apparatus 14. In particular, two cutouts 54 can be seen through which the outlets 26 of the body 18 can be guided. Also visible is a projection 55 (in this regard see also FIGS. 6C and 6D). A ridge 57 is also seen which cooperates with the shoulder 40 of the body 18 in order to axially secure the body at the cartridge 14.

[0081] A portion 59 can be seen in FIG. 4A, this portion is adapted to frictionally engage the outlets 26 of the body 18 on the assembly of the connection ring 20 and the body 18 to the dispensing apparatus 14. Once the outlets 26 have passed the portion 59, the portion 59 can act as a prevention device in order to prevent the inlets 26 of the body 18 from axially moving in the direction opposite to the insertion direction. This means that the portion 59 can act like a shoulder which the outlets 26 then cannot overcome once assembled to a dispensing apparatus 14.

[0082] Moreover, during storage of a dispensing apparatus 14 prior to the attachment to the cartridge 16, the outlets 26 can be positioned such that they are in engagement with the portion 59 and are thereby axially held in a position such that they cannot become disengaged from the one another. Therefore, the portion 59 prevents the body 18 from becoming detached from the connection ring 20. The second cutout 54 of the connection ring 20 can naturally also comprise such a portion (not shown).

[0083] FIG. 4B shows smaller recesses 56 which are configured to permit the elastic arms 42 of the body 18 to be locked into position in the connection ring 20 on the assembly of a dispensing apparatus 14 (see also FIG. 6D). The connection ring 20 further includes ribs 58, which are used to increase the grip a user has on a rotation of the connection ring 20 to ensure a secure locking of the dispensing apparatus 14 to the cartridge 16.

[0084] FIG. 4B shows a top view onto the connection ring of FIG. 4A. The cutouts 54 for the outlets of the body 18 can also be seen, as can the retention device 56 used to cooperate with the elastic arms 42 in order to lock the connection ring 20 into a fixed rotary arrangement when the dispensing apparatus 14 has been installed at a cartridge 16 to form a dispensing system 10.

[0085] The connection ring 20 is locked to the body when the body 18 has been placed such that the inlets 22a, 22b of the body 18 are aligned with the outlets 24a, 24b of the cartridge 16 by simply rotating the connection ring 20 by 90 with respect to the cartridge 16 and the body 18. This locking is due to the elastic arms 42 which can move in the cutouts 54 and can ride along the smooth internal surface 60 of the connection ring 20 and then jump into the retention space 56 in the form of a recess, once the connection ring 20 has been rotated by 90. The recess 56 act as ramps which the elastic arms 42 cannot overcome when an attempt is made to rotate the connection ring 20 into the opposite direction or further in the same direction. Thus, the elastic arms bring about a rotational fixation of the connection ring 20 with respect to the body 18.

[0086] Due to the rotational fixation of the connection ring 20 relative to the body 18, the bayonet connection device 32, 50 cannot be disengaged also bringing about an axial fixation of the dispensing apparatus relative to the cartridge. Hence the dispensing apparatus 14 cannot be removed from the cartridge 16 without excessive force. This force preferably being so large that the connection ring 20 is at least considerably impaired if not destroyed once applied.

[0087] FIGS. 5A to 5D show different views of the closure cap 12. In FIG. 5A the view of the closure cap 12 from one side can be seen in its installed position at the dispensing apparatus 14, whereas FIG. 5B shows a further view of the dispensing apparatus 14. The side view of FIG. 5B has a projection 62 which is provided to align with the projection 52 of the dispensing apparatus 14 in order to provide a visual coded alignment device or system so that the closure cap 12 can always be placed onto the dispensing apparatus 14 by means of a visual alignment.

[0088] FIG. 5C shows a section through the closure cap 12 and the dispensing apparatus 14. As can be seen, the closure cap 12 has a nose 64 which engages the groove 38 of the body 18. The nose 64 and the groove 38 are an internal coded alignment device or system. Moreover, the closure cap 12 has two passages 36 which receive the outlets 26 of the dispensing apparatus 14. These passages 36 are designed in such a way that after the use of the dispensing apparatus 14 the flowable masses still present at the outlets 26 can flow into these passages 36 without a backward flow being provided. This backward flow could be present if no such space is provided. The backward flow would lead the flowable masses back on the outside of the outlets 26 towards the groove 38 of the body 18 where one of the two-component materials could possibly come into contact with a second component of the two-component adhesive and cure there effectively locking the closure cap 12 to the dispensing apparatus 14 and at least providing a source of cross-contamination. At worst a complete cartridge 16 including an expensive adhesive is rendered unusable by such a cross contamination.

[0089] FIG. 5D shows a bottom view of the closure cap 12. On the one hand, the external visual coded alignment device in the form of the projection 62 and, on the other hand the internal coded alignment device in the form of a nose 64 and a further cutout 66 can be seen. The internal coded alignment device is dimensioned in such a way that the closure cap 12 always only cooperates with the dispensing apparatus 14 in one position. Therefore, the coded alignment device ensures that the closure cap 12 can only be installed at the dispensing apparatus 14 in one orientation.

[0090] FIG. 6A shows a top view onto a dispensing system 10 without a closure cap 12 being installed at the dispensing system 10. As can be seen, the cartridge 16 has the bayonet attachment device 32 which cooperates with the bayonet attachment device 50 of the connection ring 20. One of the bayonet prongs 32 has a cutout 34 for the alignment of the nose 48 in order to provide a further coded alignment means during the attachment of the dispensing apparatus 14 to the cartridge 16.

[0091] FIG. 6A shows a section through the dispensing apparatus when it is installed at the cartridge, but the connection ring 20 has not been rotated to fixedly connect the dispensing apparatus 14 to the cartridge 16. The section is taken at a position just above the bayonet attachment means 32, 34 of the cartridge 16. One can clearly see the bayonet attachment device 32 at the cartridge, these are provided in the form of bayonet prongs 32 and a cutout 34 which cooperate with the nose 48 and the bayonet lugs 50 provided at the connection ring 20 (see e.g. FIG. 4A)

[0092] In contrast to this, FIG. 6B shows a section through the dispensing apparatus 14 at the same height when the connection ring 20 has been rotated by 90. This rotation by 90 can be seen from a comparison of the different positions of the external protrusion 55 present at the connection ring 20.

[0093] FIGS. 6C and 6D show further sections through the same arrangement as shown in FIGS. 6A and 6B, the difference being that the section is taken at the height of the elastic arms 42. In FIG. 6C the elastic arms 42 are present in the cutout 54 and can be moved freely there and along the smooth internal surface 60. Once rotated as shown in FIG. 6D the elastic arms 42 are in engagement with the recess 56, and indeed in such a way that the connection ring 20 is locked into a position in which it cannot be rotated back into the starting position relative to the body 18 due to the elastic arms 42 engaging the respective retention means 56.

[0094] The dispensing system 10 is typically manufactured from a plastic in an injection molded process. As illustrated in the Figures above, the dispensing apparatus 14 comprises at least two parts. The dispensing system 10 can naturally be filled with a two-component adhesive such as is typically used at building sites and/or in the dental field or in other fields where two-component masses are used. The dispensing system 10 is preferably used for hand-mixing applications. This means that the masses are dispensed from the chambers 28a, 28b of the cartridge 16 via the dispensing apparatus 14 to a point of application where these masses are either mixed by hand or are applied into a mixing apparatus (not shown) for their mixing.

[0095] Although the invention has been described with regard to a two-component system, a dispensing apparatus having three or more inlets and corresponding three or more outlets for a three- or multi-component system can naturally also be employed using the concept of the present invention, as long as a spacing between the respective outlets is larger than a spacing between the inlets.