A DISPENSING DEVICE FOR FLOWING SUBSTANCES AND AN ARRANGEMENT COMPRISING SUCH A DEVICE

Abstract: A dispensing device for flowing substances comprises a tube (19) of flexible material adapted to receive the substance in question from the conduit (3) and a valve arrangement (20) for regulating flow of substance from tube out through a discharge opening (21). The valve arrangement comprises two or more valve means (23), which are adapted to each other so as to in a first relative position shut the flow past the valve means and in a second relative position open for such a flow. A cooling device is arranged along at least a part of the conduit (3) for cooling the conduit and by that a substance located therein, so that in particular in the case of food substances a degradation thereof is avoided.

Description: A dispensing device for flowing substances and an arrangemen comprising such a device FIELD OF THE INVENTION AND PRIOR ART This invention relates to a dispensing device for flowing sub stances in accordance with the preamble of the appended claim 1. The invention relates also to an arrangement comprising such dispensing device in accordance with the preamble of the appende claim 13. There is a great need of efficient dispensing devices for variou different types of flowing substances. Food products, such a mustard, ketchup, dressings and so on within the restaurant an kiosk business, cream, butter creams, jams and so on within th bakery business, liquid soap and other cleaning products and s on, may be mentioned as examples. The dispensing devices know are affected by drawbacks with respect to the valve arrangemen for regulating flow of substance and the operating means for th valve arrangement. More exactly one problem resides in obtainin an acceptable compromise with respect to tightness in close position and easiness with respect to the power required fo dispensing, i.e. the power or force required for deforming th flexible tube and operating the valve arrangement. It is namel here assumed that operating valve arrangement and by that con¬ trolling the very dispensing is carried out in that the operator presses the flexible tube together by his hand. An additional problem of known constructions of the valve arrangement is that they are not particularly well suited for such situations in which there is always an overpressure in a conduit or container upstream of the flexible tube generated by a pump controlled by means of a pressure sensor. The handling now used for food products of additive character for the food industry, e.g. bakeries etc., and the restaurant busi¬ ness is affected by several deficiencies. Thus, it is today usual that the containers containing the food product in question are located in room temperature for hours, days not to mention weeks before the content of the containers has been consumed. Further¬ more, such considerable lengths of time also often pass between thoroughly cleaning of the containers and the dispensing devices used. Such extended dwell times of food products in room tempera¬ ture give rise to a rapid increase of micro organisms harmful to humans. It is true that attempts are made to reduce this increase by admix considerable quantities of pesticides against the micro organisms in question to food products in question. However, it is today a nearly unanimous opinion within the staff of medical researchers within this field that such pesticides are consi¬ derably more harmful to the human organism than expected before. When the content of pesticides is reduced or such means are totally eliminated, an even more rapid increase of micro orga¬ nisms is created. SUMMARY OF THE INVENTION The object of the present invention is to indicate ways to find remedies to the problems and deficiencies discussed above. The invention is with respect to the dispensing device characterized by the features appearing from patent claims 1-12, and in parti¬ cular the features in the characterizing part of claim 1. With respect to the dispensing arrangement comprising this dispensing device features of interest are defined in the following claims 13-17. The construction of the valve arrangement as consisting of two or more valve means adapted to each other, such as defined in claim 1, implies reliable closing and opening function, whereby a comparatively reduced power consumption for the opening function is achieved, if the valve means during opening moves at least partially or more in a greater degree laterally with respect to the flowing direction of the substances. A dispensing arrangement comprising such a dispensing device is primarily characterized in that a cooling device for cooling the conduit and by that the substance located therein is arranged along at least a part of the conduit between the dispensing device and the substance container. Unacceptable conditions for the food substance are by that reduced to a maximum extent, and it should in connection therewith be a further cooling device for the substance container and integrated with the container or adapted for application thereon or constructed as a room recei¬ ving the container, e.g. refrigerator (claim 14). Such a con¬ struction means that a maximum portion of the substance in the dispensing arrangement is kept cooled. In spite of the possibi¬ lity that the container is placed at a considerable distance from the dispensing place, i.e. the conduit has a very great length, unacceptable degeneration of the food substance may be avoided by efficient cooling of the main part of the length of the conduit. It is more exactly preferred that the conduit is subjected to cooling so close to the dispensing device as possible. Further advantageous characteristics and developments appear from the dependent patent claims. BRIEF DESCRIPTION OF THE DRAWINGS With reference to the appended drawings, below follows a specific description of a preferred embodiment of the invention cited as an example. In the drawings: Fig 1 is a schematic view illustrating the dispensing arrangement according to the invention at a place of work in a food or restaurant kiosk or the like, Fig 2 is a partially sectioned detailed view illustrating the construction of a conduit being a part of the dispensing arrange¬ ment. Fig 3 is a cross section along the line III-III in Fig 2, Fig 4 is a partially sectioned perspective view of a portion of an alternative conduit construction, Fig 5 is a partially sectioned view illustrating the very dispen¬ sing device, Fig 6 is a view similar to Fig 5 but illustrating a tube included in the dispensing device and compressed, Fig 7 is a perspective view illustrating the valve means and their operating means, Fig 8 is a cross section view illustrating the valve means and their operating means in a somewhat modified construction and also means for synchronizing the movements of the valve means. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT An arrangement for dispensing flowing substances, in particular food products, such as mustard, ketchup etc., is schematically illustrated in Fig 1 and comprises a dispensing device 1, a container 2 for the substance in question and a conduit 3 exten¬ ding between the container and the dispensing device. A cooling device is arranged along at least a part of the conduit, serves for cooling the conduit and by that the substance located therein and will be discussed more closely in the following by means of Fig 2-4. However, it should here be mentioned that it is prefer¬ red that the cooling device extends along such a great part as possible of that portion of the conduit 3 which is located in room temperature. As it also appears from Fig 1, it is preferred that there is also a further cooling device 4 for the container 2 and integrated with the container 2 or constructed for application thereon or as indicated in Fig 1 constructed as a room 4 receiving the contai¬ ner, for instance a refrigerator. The conduit 3 is in the case according to Fig 1 intended to extend from the container 2 located in the refrigerator 4 to the dispensing device 1 while passing through an opening in the work desk top 5. The cooling device for the conduit 3 discussed above extends preferably at least between the point 6 close to the work desk top 5 and the point 7 close to the refrigerator 4. The cooling device could extend all the way to the dispensing device 1 and also into the refrigerator to connection to the container 2. As appears from Fig 1, a pump 8 is arranged to transport the substance from the container 2 to the dispensing device 1 through the conduit 3, and in this conduit a pressure sensor 9 is arran¬ ged upstream of the pump 8, and it interrupts the function of the pump on reaching a certain pressure level and starts the pump on falling below a certain pressure level. Although it is not necessary, it is preferred that the pump 8 and the pressure sensor 9 are located inside the refrigerator 4. It is illustrated in Fig 2 and 3 how the cooling device generally indicated by 10 for the conduit 3 comprises channels 11 for a coolant extending along the conduit. These channels 11 are more exactly connected to a cooling means 12, through which the coolant circulates by means of a pump 13 located in the coolant circuit such as schematically indicated in Fig 2. The conduit 3 and the coolant channels 11 are integrated into an elongate and flexible conduit/channel combination, which accor¬ dingly may be installed in the premises in question in a compara¬ tively easy way also in case of a considerable distance between the dispensing device 1 and the container 2. It appears from fig 3 that the conduit 3 and the channels 11 may be moulded into or in another way embedded in any form of fundamental or moulded mass 14 while forming a comparatively flat element. In the case shown in Fig 2, i.e. when the supply as well as the return of the coolant extend along the conduit 3 a suitable transition has to be arranged beside the conduit 3 at one end of the cooling device, such as indicated at 15. It is of course preferred that the material 14 is heat insulating. An alternative embodiment of the combination of conduit 3 and coolant channels 11 is illustrated in Fig 4. As distinguished from the preceding case, where the coolant channels are located laterally to a conduit 3, the conduit 3 and the channels 11 are in Fig 4 concentric and more exactly so that the conduit 3 is the central one while the channels 11 are located externally of the conduit 3. In the case of more than two channels 11 a first group thereof may be utilized for supply of coolant while a second group thereof may be utilized for return. It also appears from Fig 4 how the conduit 3 and the channels 11 could be made out of one piece by for instance extrusion of a plastic material by the presence of bridges 16, which may be substantially radially directed, between portions defining the conduit 3 and the chan¬ nels 11. There is suitably an insulating layer 17 externally of the coolant channels and outermost a protecting shell 18. Coolant channel transitions corresponding to the one indicated by 15 in Fig 2 are of course also present in the case according to Fig 4 at one end of the very cooling device. The construction of the dispensing device 1 appears more closely from Fig 5-8. This comprises a tube 19 made of a flexible mate¬ rial, such as plastic or rubber, which is adapted to receive the substance in question from the conduit 3, and a valve arrangement 20 for regulating a flow of substance from the tube 19 out through a discharged opening 21, said valve arrangement 20 being arranged to be actuated for flow regulation by pressure action (arrows 22 in Fig 6) on the tube 19. The valve arrangement 20 comprises in the example four valve means 23, which are adapted to each other so as to in a first relative position (Fig 5 and 8) shut the flow past the valve means and in a second relative position (Fig 6) open for such a flow. The valve means 23 are connected to operating means 24 for mechanically operating the valve means 23 for opening on pressure action on the flexible tube 19. Elastic return means are present for returning the valve means 23 into the closing position. These return means may be constituted by the flexible tube 19 and/or other elastic means, e.g. an elastic means 25 extending around the valve means 23. The very tube 19 may be utilized as an elastic return means as a consequence of the inherent tendency thereof to take back its original shape if the ends of the operating members 24 remote from the valve means 23 are received in seats 26 arranged on the inside of the flexible tube 19. The seats 26 may for example be formed by the fact that the tube 19 on the inside has a substan¬ tially axially directed circular rib, which between itself and the adjacent surface on the inside of the tube 19 forms a space. The elastic means 25 around the valve means 23 has the character of an annular sleeve which grasps around the valve means 23 and press them radially inwardly to bear against each other. The elastic means 25 will accordingly counteract the movement radi¬ ally outwardly of the valve means 23 or parts thereof, i.e. away from each other. As it appears from the figures in the drawings, the elastic means 25 and the valve means 23 may have mutually engaging portions so as to obtain a determination of their mutually positions. These portions have the character of extensions/recesses. Recesses 27 are in this example arranged in the valve means 23 (Fig 7), while an extension 28 fitting into the recesses 27 is arranged on the elastic means 25. The latters may for example together form a circular slot, in which case the extension 28 on the elastic means 25 is made of an annular bead extending inwardly. The operating means 24 are constituted by elongate operating members 24 rigidly connected to the valve means 23 and located inside the flexible tube 19 so as to be actuated thereby on pressure action on the tube. As distinguished from what has been described with respect to Fig 5 concerning the seats 26, such seat 26 may in an alternative embodiment (Fig 8) be completely omitted and means 29 for synchronizing the movements of the valve means 23 are arranged instead. By "synchronizing" is meant that all valve means shall be brought to simultaneously and to an identical extent describe opening as well as closing movements, i.e. always be located in an identical position. The synchroni¬ zing means 29 are more exactly constituted by actuating means 29, which in this example are four to the number, so that accordingly each operating member 24 is rigidly connected to such an actu¬ ating means 29 each. Each actuating means 29 is arranged to function actuating upon one of the adjacent operating members and has also a curved shape appearing from Fig 8, so that when two diametrically opposite operating member 24 are influenced towards each other without any influence upon the other operating members the means 29 will ensure that not only the two actuated operating members 24 but also the two other ones move inwardly and to the same extent as the actuated operating members, which gives rise to a synchronised movement of the valve means 23. As appears from Fig 8 the operating members may along their portions intended to be actuated by the tube 19 be, as indicated at 30, of a comparatively flat and curved construction in corre¬ spondence with the curve of the tube 19 for a large surface contact between the inside of the tube 19 and the operating members. The valve means 23 bears in closing position against each other along bearing or abutment surfaces 31 and the valve means 23 are adapted to when opening pivot with respect to each other, so that the ends 32 of the valve means located downstream as seen in the dispensing direction move away from each other (see Fig 6). The ends of the valve means located upstream are arranged to bear laterally towards each other while the valve means 23 pivot with respect to each other. Adjacent valve means 23 may as indicated in Fig 7 engage with each other through form locking means, e.g. extensions/pins 34 and recesses 35. According to a suitable embodiment may then every single valve means 23 has a pin 34 for engagement with an adjacent valve means and also a recess 35 intended to match with a pin of the other adjacent valve means. The valve means 23 form in their closing position a substantially circular cross section configuration. Every single valve means then forms a sector of a circle of this circular configuration. The valve means 23 form in their closing position together a channel 36, which at the upstream ends 33 of the valve means 23 emerges into the tube 19 but ends before the downstream ends 32 of the valve means, which in said closing position form a tight closure by the mutual abutment thereof. This channel 36 is as appearing most clearly from Fig 7 formed by the fact that each valve means 23 has a recess located inwardly, which however ends before the lower ends of the valve means. It appears from Fig 5 and 6 how the upper end of the tube 19 is braced in a nipple-like device 37, which also functions as sealing connection to the conduit 3. The lower end of the tube 19 is in an analogous way sealingly braced to a part 38 defining the discharge opening 21, which part in this example has a seat for receiving the elastic means 25 and the set of valve means 23 located radially inwardly thereof. It also appears from Fig 5 and 6 how the elastic means 25 may at the top have a rib extending substantially radially inwardly, through bores in which the operating members 24 of the valve means extend. The conduit 3 may suitably have one or several balls 39 or differently constructed bodies arranged therein, the task of which is to pass through the conduit while liberate the same from material depositions. Means 40 are arranged in places turned away from each other, e.g. close to the dispensing device 1 and the pressure sensor 9, said ball 39 being not able to pass these means. The ball 39 may be brought to pass through the conduit to an fro by alternatively reversing the pump 8, and it is suitable that the pump 8 in connection therewith transports a cleaning fluid through the conduit. The operator may when using the arrangement described by means of the dispensing device 1 optionally dispense the flowing substance by pressing the tube 19 by his hand. The pressure sensor 9 detects the pressure reduction in the conduit 3 and starts the pump 8, which pumps the substance in the direction towards the dispensing device 1 and by that increases the pressure in the conduit 3 until the pressure sensor inactivates the pump. That part of the substance which then is located in the conduit 3 is efficiently cooled through the cooling device 10 described and the substance in the container 2 is also kept efficiently cooled in the refrigerator 4 or by means of the cooling device in question otherwise constructed. A dispensing device 1 may during periods of inactivity be suspended in a suitable support 41. It is evident that the invention is in no way restricted only to the embodiment described but many modifications are possible within the scope of the inventional idea. It may for example be mentioned that the valve means 23 may be fewer as well as more in number than four as long as the number is at least two. Further¬ more, the operating members 24 and possibly also the valve means 23 may be constructed as one piece with the tube 19.

Claims: Claims 1. A dispensing device for flowing substances, comprising a tube (19) of flexible material adapted to receive the substance in question from a conduit (3) or container (2) and a valve arrange¬ ment (20) for regulating flow of substance from the tube (19) out through a discharge opening (21), said valve arrangement being arranged to be actuated for flow regulation by pressure action on the flexible tube, c h a r a c t e r i z e d in that the valve arrangement com¬ prises two or more valve means (23) adapted to each other so as to in a first relative position shut the flow past the valve means and in a second relative position open for such a flow. 2. A device according to claim 1, c h a r a c t e r i z e d in that the valve means (23) are connected to operating means (24) so as to mechanically operate the valve means for opening on pressure action on the flexible tube. 3. A device according to claim 1 or 2, c h a r a c t e r i z e d in that elastic return means (19; 25) are present for returning the valve means to their closing position. 4. A device according to claim 3, c h a r a c t e r i z e d in that the return means are consti¬ tuted by the flexible tube (19) and/or second elastic means (25), e.g. one or several elastic means extending around the valve means. 5. A device according to any of the preceding claims, c h a r a c t e r i z e d in that means (29) are arranged for synchronizing the movements of the valve means (23). 6. A device according to claim 2, c h a r a c t e r i z e d in that the operating means (24) ar constituted by elongate operating members connected to the valv means and located inside the flexible tube so as to be actuate thereby on pressure action on the tube. 7. A device according to claim 6, c h a r a c t e r i z e d in that the ends of the operatin members (24) remote to the valve means are received in seats (26 arranged on the inside of the flexible tube. 8. A device according to any of the preceding claims, c h a r a c t e r i z e d in that the valve means in thei closing position bear against each other along bearing surface (31) and that the valve means are arranged to on opening pivo with respect to each other so that the ends (32) of the valv means located downstream as seen in the discharging directio move away from each other. 9. A device according to claim 8, c h a r a c t e r i z e d in that the ends (33) of the valv means (23) located upstream are arranged to bear against eac other while the valve means pivot with respect to each other. 10. A device according to claim 8 or 9, c h a r a c t e r i z e d in that adjacent valve means (23) engage with each other through form locking means (34, 35), for instance extensions/pins and recesses. 11. A device according to any of the preceding claims, c h a r a c t e r i z e d in that the valve means together form a substantially circular cross section configuration. 12. A device according to any of the preceding claims, c h a r a c t e r i z e d in that the valve means in their closing position together form a channel (36), which emerges at the upstream ends of the valve means into the tube but ends before the downstream ends of the valve means, which form a tigh closure in said position. 13. An arrangement dispensing flowing substances, especially foo products, comprising a dispensing device (1), a container (2) fo the substance in question and a conduit (3) extending between th container and the dispensing device, c h a r a c t e r i z e d in that a cooling device (10) fo cooling the conduit and by that the substance located therein i arranged along at least a part of the conduit (3). 14. An arrangement according to claim 13, c h a r a c t e r i z e d in that there is also one furthe cooling device (4) for the container which is integrated with th container or adapted to be applied thereto or made as a space (4), e.g. a refrigerator, receiving the container. 15. An arrangement according to claim 13 or 14, c h a r a c t e r i z e d in that a pump (8) is arranged to transport the substance from the container to the dispensing device through the conduit and that a pressure sensor (9) is arranged in the conduit upstream of the pump and which interrupts the function of the pump on reaching a certain pressure level and starts the pump on falling below a certain pressure level. 16. An arrangement according to any of the claims 13-15, c h a r a c t e r i z e d in that the cooling device (10) for the conduit comprises one or several channels (11) for a coolant extending along the conduit. 17. An arrangement according to claim 16, c h a r a c t e r i z e d in that the conduit and the coolant channels are integrated so as to form an elongate and flexible conduit/channel combination.

Inventors: NISS JAN-ANDERS, NISS, JAN-ANDERS
Applicants: NISS JAN ANDERS, NISS, JAN-ANDERS
Application year: 1992
Main classification: A47F1
IPC codes: A21C15, B67D5