A device for withdrawing liquid from a reservoir by means of a water jet device

Abstract: A device for attaching a water jet device to a concentrate container or a reservoir by means of a clamping device or a foot (1), comprising a connecting piece (3), in which the foot (1) is arranged to be fixed and put into sealing abutment with the insert piece (3) in one movement, for which purpose the connecting piece is provided externally with threaded parts (6,7) designed to cooperate through a bayonet catch with a complementarily designed part of the foot. The container, which is designed as a flexible bag, may be provided with a base plate (9) at the position of the connecting piece, said connecting piece being designed as an insert piece, so as to ensure that the outlet opening (11) of the insert piece (3) remains open.

Description: The invention relates to a device for attaching a water jet device to a concentrate container or reservoir by means of a clamping device or a foot, comprising a connecting piece. In a similar device known from EP-A-0 325 335 (not published before the priority date of the present application) the reservoir box is supplied closed, and a filled flexible bag has been incorporated inside. Before use the connecting piece, which is an insert piece here, should be pulled out through an opening and fixed to the box by means of collars. Because there are a plurality of collars, this leads to mistakes if the user does not pull out the insert piece far enough and consequently fixes the box incorrectly. In addition, this known device makes use of a clamping device which is slid around the insert piece. As a consequence of not pulling out the insert piece sufficiently far or as a consequence of the box being less stiff, so that it may assume a concave shape on the side concerned, the clamping device is not always correctly slid around the insert piece, so that the water jet device does not operate correctly, and in extreme cases no dispensing takes place at all. Furthermore, in the apparatus described in EP-A-0 325 335, mentioned above, it is possible for the clamping device to be slid around the insert piece from two sides. This too leads to mistakes in practice. Because on the one hand the clamping device should be attached to the insert piece through a horizontal sliding movement, and on the other hand the venturi should be fixed in the box by being clamped around the insert piece through a vertical rotary movement, the clamping device must be designed in two parts. The object of the invention is to remove the drawbacks mentioned above. For this purpose in a device of the above kind the interconnecting means are in the form of parts of a bajonet type catch, said parts being designed in such a manner that due to the rotational interconnection of the insert and the foot these two parts are sealingly clamped together and at the same time the insert and the adjacent part of the flexible bag are clamped onto the inner side of the box bottom wall. An additional advantage is that the foot can be designed in one part, incorporating the venturi element. Further advantages of this construction are that the foot can be manufactured at less cost, and the construction is easier to clean and easier to use. In a further elaboration of the invention the container, which is designed as a flexible bag, can be provided with a base plate at the position of the connecting piece, which is designed as an insert piece. The base plate made of stiff material can be bent so as to ensure that the outlet opening of the insert piece remains open. A further advantage of the bent shape is that the insert piece is within the confines of the box during transport. In addition, to ensure that the flexible bag can be emptied properly, at least a part of the box wall receiving the insert piece may be designed to extend obliquely. Naturally, the foot may then be provided with corresponding oblique parts. In illustration of the invention, one embodiment of the device will be described, by way of example, with reference to the accompanying drawing, in which Fig. 1 is a top plan view of the foot of the clamping device by means of which a water jet device can be attached to a concentrate container; Fig. 2 is a cross-sectional view taken on line A-A of Fig. 1; Fig. 3 is a cross-section of an insert piece mounted in a reservoir box; and Fig. 4 is an elevational view taken on line IV-IV of Fig. 3, without the surrounding box and the flexible bag. As shown in the drawings a device for attaching a water jet device 2, indicated schematically by dashed lines, to a foot 1 by means of a clamping device, comprises an insert piece 3 (see Fig. 3), which is fixedly connected to a flexible bag 4 suspended within a reservoir box 5. For further details on the method of suspension reference is made to applicants' US patent 4,653,252, which is incorporated herein by reference. Foot 1 and insert piece 3 are provided with complementary threaded parts 6, 7, which can cooperate in the fashion of a bayonet catch. This way of attachment not only has the advantage that the foot can be fixed and put into sealing abutment with the insert piece in one single movement, but also that the foot consists of one part incorporating the venturi element. As is further shown by Fig. 3 in particular, the insert piece is fixedly connected to the flexible bag 4, and is in fact detachably connected to box wall 5. In Fig. 3 the left-hand part shows the insert piece before use, i.e. provided with a cover cap or lid 15, and the right-hand part shows the insert piece during use, i.e. after coupling with a schematically indicated bayonet finger 16 of foot 1. Insert piece 3 is provided with partitions 8 to keep it open, as is known from Dutch patent application 8800113. To ensure that the bag may be emptied fully, the flange of base plate 9 in Fig. 3 is bent, so as to prevent with certainty that parts of the collapsing bag block the outlet openings of the insert piece as a consequence of withdrawing liquid from the bag. In addition, a comparison of the left-hand part and the right-hand part of Fig. 3 shows that in attaching the foot a good, in this case strong tightening of insert piece 3 (with pre-stress) has taken place, thereby effecting a good sealing. The insert piece 3 is provided with the partitions 8 referred to as well as outlet openings 10. Engaging in another outlet opening 11 is the end 12′ of a resilient valve 12, of which valve a part of a flange or rim 13 is bent inward and abuts resiliently with a hub 14 of insert piece 3. As best shown by Fig. 2, the upper end of foot 1 may be designed to extend obliquely, so as to ensure a good emptying of the superjacent flexible bag, which bag is not shown in Fig. 2. In a similar way container wall 5 will in this case also be designed to extend obliquely.

Claims: An assembly of a concentrate liquid container comprising a box (5) having a bottom wall provided with an opening and a flexible bag (4) containing a supply of concentrate liquid to be withdrawn through said opening, said flexible bag (4) being supported within said box (5), an insert (3) extending from within said flexible bag (4) through said opening in the bottom wall of said box (5), said insert (3) being provided with outlet openings (10) and a resilient valve (13) controlling the outflow of liquid through said outlet openings (10) and being movable from a position entirely within the box (5) to an extracted portion for connecting the insert (3) with the foot (1), the assembly further comprising a connecting piece (1) for connecting a water jet device (2) to said insert (3), said connecting piece being designed as a foot (1) having mounted therein the said water jet device (2), said insert (3) and said foot (1) being provided with cooperating interconnection means (6,7) in the form of parts (6,7) of a bajonet type catch, said parts (6,7) being designed in such a manner that due to the rotational interconnection of the insert (3) and the foot (1) these two parts (3 and 1) are sealingly clamped together and at the same time the insert (3) and the adjacent part of the flexible bag (4) are clamped onto the inner side of the box bottom wall (5). An assembly according to claim 1, characterized in that said insert (3) is connected to said flexible bag (4) by a base plate (9) made of stiff material and being bent so as to ensure the outlet opening (10) of said insert (3) remains open. An assembly according to claim 2, characterized in that at least a part of said box bottom wall (5) receiving said insert (3) extends obliquely. An assembly according to claim 3, characterized in that the foot (1) is provided with corresponding oblique parts.

Inventors: SPERNA WEILAND JAN ADOLF ERNST, VAN HATTEM JAN CORNELIS, SPERNA WEILAND, JAN ADOLF ERNST, VAN HATTEM, JAN CORNELIS
Applicants: SARA LEE DE NV, SARA LEE/DE N.V.
Application year: 1990
Main classification: B67D1
IPC codes: B67D1, B65D77