MXPA01005234A - Device for connecting a pump - Google Patents

Abstract

The invention concerns a device for connecting a pump (P) body (C) to a soft bag (S) containing a liquid or creamy product, characterised in that it comprises a cylindrical sleeve (10) for sealingly fixing the bag (S) connected in the upper part of the bearing shoulder (11), a peripheral ring (13) assembling the wall of a rigid external box (B) and a central socket (12) sealingly supporting the pump (P).

Description

DEVICE FOR COUPLING A PUMP Field of the Invention The present invention concerns a device for coupling a pump to a flexible bag containing a liquid or creamy product, in order to constitute a distributor without air intake. The "airless" distributors, that is to say, those that operate without air intake in the tank, consist of a pump constituted particularly of a body, provided in its lower part with an intake orifice, capable of communicating with the internal volume of a flexible sac that forms the deposit of the product to be distributed. This bag is fixed tightly on the body of the pump and is generally enclosed in a more rigid outer casing or packaging. However, these distributors are not rechargeable from the fact that the pump and the bag and sometimes also the outer garment, are assembled in a definitive way, their separation implies an irreversible rupture of the hermeticity. In addition, the pump / bag assembly does not form an integral unit adapted to all outer garments. Or, for marketing reasons, the shape and dimensions of this garment are imposed by the manufacturers of products and REF. 129167 they are then different from one product to another, which poses coupling problems. US-A-5, 139, 168 discloses a device for coupling the body of a pump to a flexible bag, which contains a liquid or creamy product, which comprises a cylindrical adapter for sealing the bag, which is connected to the bag. the upper part with a support or carrier seat, on the one hand, of a peripheral assembly ring with the wall of a rigid outer box and, on the other hand, of a central sleeve, of airtight support of the pump. However, this device does not ensure a satisfactory seal for all types of pumps.

The aim of the present invention is to resolve satisfactorily the technical problems mentioned above. This objective is achieved, according to the invention, by means of a device for coupling the body of a pump on a flexible bag containing a liquid or creamy product, characterized in that said central sleeve is provided with an internal seal in which the body of the pump is fitted in a removable manner and fixed by tightening or radial clamping. Preferably, said seal is disposed inside the adapter for fixing the bag.

According to another feature, the device further comprises a closing and clothing collar designed to imprison said pump covering the central sleeve. According to a variant, said collar contains retaining means on the central sleeve. According to another variant, said collar is constituted of a low part with an external skirt provided with interlocking or fixing members on the central sleeve and which extend on a high part, of restricted diameter provided with a transverse wall that is supported axially on the body of the pump. According to yet another variant, said collar contains an annular adjustment or fixing throat, intended to receive the upper edge of the sleeve. According to yet another feature, said peripheral ring is provided with an outer air inlet orifice. According to other features, said peripheral ring is removably assembled with the outer box by means of interlocking members. Preferably, in said adapter or fixing connector it is adapted to the welding of the bag.

The device of the invention allows, if necessary, to easily separate the pump from the bag in order to effect its replacement or recharge. In addition, the peripheral ring allows a possible removable approach of the pump / bag assembly on the outer packaging box whose profile and geometry are any, which gives it a great flexibility of use and allows the use of refills. On the other hand, since the pump is not permanently connected to the bag, it is possible to ensure a simple and quick change of the pump in case of malfunction or modification of the distribution mode (for example, passing the mode " airless "to an atmospheric modality). The device of the invention allows to provide a distribution system, in the form of a pump / bag assembly completely independent and ready for use if the bag is previously filled with product. This system can be packed quickly and easily in different external boxes, whose shapes are characteristic of the brands of the products. Thus, it becomes possible to market a recharge constituted by the preceding distribution system, suitable and intended to be fixed on a box or personalized case sold, for example, separately.

The device of the invention also allows the filling of the bag by the bottom, before the introduction into the box or case, which allows high conditioning rates closing the bottom of the bag is then carried out before filling, by direct welding in N The "vein" of the product Otherwise, the device of the invention also applies to pumps without venting, that with venting or venting Brief description of the figures The invention will be better understood with the reading of the following description, accompanied by The drawings on which: Figure 1 represents a sectional view of a first embodiment of the device of the invention, Figure 2 represents a sectional view of a second embodiment of the device of the invention. shown on the figures is intended for the coupling of a pump P and more particularly of an "airless" pump, to a flexible bag S rma liquid or creamy product tank. The pump P is presently without venting and is equipped with an axially movable distribution head T which covers the exhaust duct E which forms a projection towards the outside of the body C of the pump P.

This coupling device comprises a lower connection element 1 consisting of a cylindrical adapter 10 for hermetic fixing of the bag S, which is attached at the upper part to a bearing or support seat, on the one hand, of a peripheral ring 13 for assembling with the wall of an outer packaging and, on the other hand, of a central sleeve 12 of hermetic support of the pump P. The outer packaging is preferably formed by a box or rigid case B of any shape but which must, however, present an edge upper part adapted to a simple mechanical connection with the ring 13 of the lower element 1. This connection is, if necessary, removably secured by means of suitable locking or screwing members. For this purpose, the lower edge of the ring 13 has on the outer side a square section 13a intended to be fixed (for example by gluing or welding), in support of the adjustment against a plate b, placed on the upper edge of the wall internal of the box or case B. The diameter of the opening of the box B is wider than the diameter of the adapter 10 and the bag is rigidified at the top by said adapter, the introduction and assembly of the pump / bag assembly in box B, they are quick and easy.

Preferably, on the inner side, the lower edge section of the ring 13 is formed in bevel 13b. If the box is airtight and, if the fixing of the ring 13 is hermetic, it is then foreseen to make through the side wall of the ring 13 a vent hole 130, designed to allow the entry of external air, in order to compensate in box B, the depression generated by the progressive deformation of the bag S resulting from the evacuation of the product. The central sleeve 12 contains an internal seal 14 preferably made in the coaxial extension of the adapter 10 and in which the cylindrical body C of the pump P is removably engaged. The radial pressure is applied only on the upper part of the body C of the pump P having the largest diameter. In the embodiment of FIG. 1, the fixation adapter 10 of the bag S surrounds, in the present, co-axially the seal 14 and consequently the lower part of the body C which is then free, which allows the Inlet hole A located at the lower end of the conical body of the body C be in direct contact with the product. It is also possible, according to a variant not shown, to misalign the internal seal 14 in relation to the adapter 10.

In the embodiment of FIG. 2, the adapter 10 is made in the coaxial extension of the seal 14 but the radial pressure of the pump body is always ensured only at the level of the adapter. In all the embodiments, the adapter forms a projection towards the lower part beyond the plane defined by the lower edge of the ring 13. In the embodiment shown on FIGS. 1 and 2, the device also contains an upper element consisting of a collar 2, which it ensures the blocking of the pump P and the sleeve of the sleeve 12 of the lower element 1. The upper part 2a of the collar 2 is connected to the lower part 2b which has a restricted diameter, forming a support or seat 2c. The upper part 2a contains a transverse wall 21 which is axially supported on the upper part of the body C of the pump P, to clamp it between the collar 2 and the sleeve 12. The transverse wall 21 is provided with a central hole 21a intended to receive the exhaust pipe E of the pump P. The upper part 2a also contains an internal area 24 for fixing the upper part of the pump body and an external area 25 for axial guidance of the distribution head T.

The lower part 2b of the collar 2 is formed of an outer skirt 22 provided with retaining means, on the central sleeve 12. These means comprise locking members 22a made on the inner face of the skirt 22 and intended to cooperate with complementary organs 12a contained on the external face of the sleeve 12. Preferably, the lower part 2b contains an inverted annular throat 20 delimited between the inner face of the skirt 22 and an internal cylindrical flank 23 contained in the seat or support 2c. The throat 20 receives the upper edge of the sleeve 12 when the locking members 22a of the skirt 22 are locked on the members 12a in order to ensure the adjustment of the upper element 2 on the lower element 1. In this position, the lower edge of the skirt 22 abuts against the support 11. In the case where the device of the invention is applied to a pump without venting (as shown in FIG. 1), the tightness is mainly ensured by the cooperation between the wall 21 with the fixing area 24, on the one hand , and the upper part of the body C of the pump P are exhaust ducts E, on the other hand.

In the case in which the device of the invention is applied to a pump body provided with a vent hole (not shown) that would then be realized between the gasket 14 and the fixing zone 24, the required airtightness would then be ensured by a radial pressure of the joint 14 on the body C. It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects or products to that it refers.

Claims (10)

1. CLAIMS Having described the invention as above, the content of the following claims is claimed as property: 1. Device for coupling the body of a pump to a flexible bag containing a liquid or creamy product, comprising an adapter or cylindrical connector, of a hermetic fastening of the bag, which is coupled in the upper part to a bearing or carrier seat, on the one hand, a peripheral ring for assembly with the wall of a rigid outer box and, on the other hand, a sleeve for hermetic support of the pump, characterized in that said sleeve is provided with an internal seal in which the body of the pump is fitted, removably and fixed by radial pressure. Device according to claim 1, characterized in that said seal is disposed inside the adapter for fixing the bag. The device according to any one of the preceding claims, characterized in that it also comprises a locking and clothing collar intended to clamp said pump covering the central sleeve. Device according to claim 3, characterized in that said collar contains retaining means on the central sleeve. 5. Device according to claim 3 or 4, characterized in that said collar is constituted by a low part with an external skirt provided with interlocking members on the central sleeve and which extend along a high part of restricted diameter, provided with a transverse wall that it is supported axially on the body of the pump. Device according to claim 5, characterized in that said collar contains an annular adjustment throat, intended to receive the upper edge of the sleeve. Device according to one of the preceding claims, characterized in that said peripheral ring is provided with an outer air inlet orifice. Device according to one of the preceding claims, characterized in that said peripheral ring is removably assembled with the outer case by means of locking elements. Device according to one of the preceding claims, characterized in that said fixing adapter is adapted to the welding of the bag. 10. Use of the device according to any of the preceding claims to make a pump / bag assembly ready for use.