BE1030614B1 - A DOSING DEVICE FOR A BAG-ON-VALVE DISTRIBUTOR - Google Patents

Abstract

A dosing device for a bag-on-valve container (1), comprising a dosing valve (7) consisting of an outer chamber (12), an inner chamber (13) and a flexible chamber (14), wherein a product (5) from a bag (4) is distributed by means of the pressure of the product (5) in the outer chamber (12) on the flexible chamber (14) through the inner chamber (13) via a shaft of the activation pin (18).

Description

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A dosing device for a bag-on-valve distributor BE2023/0003

This invention relates to a dosing device comprising a dosing valve for a so-called bag-on-valve distributor. More specifically, this invention concerns a dosing mechanism of a valve that is provided on a bag with a product in a holder and whereby a product can be distributed and filled in the desired quantity by pressing an activation mechanism.

A bag-on-valve technology is well known. A valve is attached to a bag containing a product and it is then inserted into a container. The holder is then, for example, a spray can, which can be made of metal. This bag is rolled up and placed in the holder. The bag is filled with product. Under the pressure of a compressed gas, the contents of the bag are distributed through a nozzle of the container. Air, nitrogen and liquid gas are usually used.

The gas is therefore located around the bag and does not come into contact with the contents, and therefore not with the product to be distributed. This pressure on the bag distributes the product when activated. Such a device is described in US2008314475.

In the prior art it is known to empty the contents of a chamber in a valve by means of an annular piston, which is displaced by a gas as in US2021/0061544.

This technology has the important advantage that the gas does not come into contact with the product, which reduces the risk of contamination. This is, among other things, the case with foodstuffs, but BE2023/0003 is not limited to these types of products, where an important advantage is achieved. This is also the case for medicines, such as with a nebulizer.

This device, a bag-on-valve distribution device, also makes it possible to use the holder at all angles, including upside down. This has the important advantage that the holder is easy to use for certain applications.

This device makes it possible to distribute all types of products, both liquid and viscous products, which offers a third advantage. As the

IS device if an atomizer is used, a diluent or a gas can be added to the product, so that the product can be atomized better.

Finally, a fourth advantage is that the product can be completely emptied from the bag. No product is left behind, which offers an economic and ecological advantage.

However, with a bag-on-valve distributor, accurately dosing a product is an important problem. For specific applications, an accurately measured quantity must be distributed. This invention offers a solution to this problem by providing a valve that can precisely distribute a measured amount.

In particular, this invention concerns a multi-chamber valve for accurately dosing the product. The use of multiple chambers offers the advantage that the product can move a measured dose within the chambers in a controlled manner and where there is no contact between the product and the gas provided to supply the pressure to the product.

The invention is explained in detail with reference to the following drawings:

Figure 1: Side view of holder with bag-on-valve

Figure 2: detail side view of a dosing valve

According to figure 1, a dosing device is proposed, provided with a holder (1), consisting of a cylindrical body (2) with a narrower neck (3).

IS Such holders are generally known in the state of the art and are made of metal or plastic, but other materials are also suitable. A bag (4) containing a product (5) is provided in this holder (l). This bag (4) is also provided with a dosing valve (7) at its neck (6). This combination therefore forms a bag-on-valve distribution system. The product (5) can be a liquid, but also a viscous substance or a gel. Furthermore, the product can consist of an aqueous solution or an emulsion to which a diluent, liquid gas or CO, is added to achieve precise atomization. This makes it possible to accurately apply or distribute pharmaceutical and therapeutic substances with this device.

It is important that the diluent, liquid gas or CO; cannot be released from the product (5) due to the equal pressure in all chambers. A pressure medium is provided around the bag (4), which can be a gas (8), including a compressed or a liquid gas. Because the gas (8) is located around the bag (4) and there is therefore no contact with the product (5), the risk of contamination is nil. The BE2023/0003 gas exerts a constant pressure on the bag (4) with product (5). According to a special embodiment, the gas (8) could also be replaced by a means that exerts a mechanical or electrical pressure on the bag (4).

The metering valve (7) is attached to the bag (4) by known techniques, such as a heat-seal weld attachment by means of a mounting body (9). The bag (4) is rolled up and inserted into the holder (1) and the dosing valve (7) is fitted into the neck (3) of the holder (1) and sealed with seal {10). The mounting body (9) is provided with a channel (11) that is connected to the product (5) in the bag (4).

The dosing valve (7) consists of an outer chamber (12) that is connected to the channel (11). The outer chamber (12) is filled with the product (5) due to the pressure around the bag (4). This outer chamber (12) therefore forms a covering around the other parts of the dosing valve (7).

Within the outer chamber (12) is an inner chamber (13). This inner chamber (13) is connected to a flexible chamber (14). This flexible chamber (14) is preferably made of an elastomer, an elastic material that returns to its original shape after an external load. Rubbers or siloxanes, among others, are suitable for this. The flexible chamber (14) is located between the outer chamber (12) and the inner chamber (13) of the metering valve (7). The outer chamber (12) communicates with the inner chamber (13) via passage (15). The passage (15) is also the opening of the channel (22) in the inner chamber (13).

A passage (17) is provided between the inner chamber (13) and the flexible chamber (14). The dosing valve (7) is further provided with an activation pin {18) that is provided with a BE2023/0003 shaft with a bore (21). The activation pin (18) is connected to rod (19), which extends into the channel (22) of the inner chamber (13). A guide (23) is provided around the channel (22), so that the rod (119) always moves centered in the channel (22). This guide (23) can consist of at least one groove. A closure (16) with a deformable part is provided in the channel (22) near the mouth. This closure (16) is also made of an elastomer, such as a siloxane, rubber or other plastic and is cylindrical, with a recess at the bottom. This allows the walls of the barrier (16) to be deformable. This deformable closure (16) ensures that the passage (15) of the channel (22) within the inner chamber (13) can be closed. The shaft of the activation pin {(18) is provided with a bore{21) and is located at or in a seal (24) at the top of the inner chamber (13) of the dosing valve (7). The inner chamber (13) also contains a spring (20), which extends around the rod (19).

The operation for distributing the product (5) from the bag (4) is then explained in detail. Figure 2 shows a detailed view of the dosing valve (7).

The product (5) is pressurized in bag (4) by the gas (8) surrounding this bag (4). This means that the product is located in the outer chamber (12) through the channel (11) of the mounting body {(9). Because the outer chamber (12) is also connected to the inner chamber (13), the product (5) also spreads in this inner chamber (13). The product (5) then moves into the flexible chamber (14) through passage (17). This means that the chambers (12,13,14) of BE2023/0003 and the dosing valve (7) are completely filled with the product (5) due to the pressure of the gas (8).

When pressing the activation pin (18) or in other words when activating it to distribute the product (5), the rod (19) is moved downwards in the direction of the closure {16). At the same time, the spring {20) is also pressed down into the inner chamber (13). The spring (20) is put under tension in this way. The closure (16) is moved through the guide (23) through the channel (22) to the passage (15) and then closes it.

This closes off the supply of product (5) between the outer chamber (12) and the inner chamber (13).

The deformation of the lower part of the seal (16) pushes the rod (19) and the activation pin (18) further downwards, freeing the bore (21) under the seal (24).

The product (5) contained in the flexible chamber (14) is pushed through passage (17) to the inner chamber (13), and then distributed via the bore (21) through the shaft of the activation pin (18). become. The pressure of the product (5) in the outer chamber (12) on the flexible chamber (14) empties it.

When releasing the activation pin {18), the spring (20) relaxes and the activation pin (18) is pressed back up to its original position, so that the bore (21) is closed again by the seal (24) and there is no product (5) can be distributed.

Filling the bag (4) with product (5) is done as follows. The product (5) is delivered via an external accessory, not shown here in the figures, through the bore (21), which is released from the seal (24), along the shaft BE2023/0003 when the activation pin (18) is pressed. of the activation pin (18).

The product (5) is introduced into the flexible chamber (14) via the inner chamber (13) through passage (17).

The passage (15) is closed by the barrier (16), as the rod (19) moves the barrier (16) into the channel (22).

Due to the inward pressure of the product (5) on the flexible wall of the flexible chamber (14), this wall deforms, causing an opening to be formed at its bottom through which the product (5) flows through to the outer chamber (12) to then flow through channel (11) to the bag (4).

When the spring (20) is relaxed, the activation pin (18) is pressed back up, allowing the product (5) to flow under pressure from the bag (4) to the different chambers (12, 13, 14) and you're done. is for use.

Claims (7)

Conclusions BE2023/0003 1. A dosing device comprising a holder (1) in which a bag (4) with product (5) and a dosing valve (7), provided with a number of chambers (12,13,14), a mounting body (9) with a channel ( 11) where the fastening means (9) is closed to the bag (4), a pressure means (8) around the bag (4) in the holder (1), an activation pin (18) with a shaft and a bore (21) , which is closed by a seal (24), and whereby by pressing the activation pin (18) a rod (19) moves a closure (16) in a guide (23), through which a passage (15) can be closed and characterized in that the dosing valve (7) is provided with an outer chamber (12), an inner chamber (13) and a flexible chamber (14), wherein the outer chamber (12) forms the connection with the channel (11), the inner chamber (13) communicates with the outer chamber (12) via the passage (15), the inner chamber (13) communicates with the flexible chamber (14) via a passage (17) and whereby by closing the passage (15) through the closure (16), the product (5), by the pressure in the outer chamber (12) on the flexible chamber (14), is precisely dosed through the inner chamber (13) and via the shaft and bore (21) of the activation pin (18). A dosing device according to claim 1 and characterized in that the pressure in all chambers (12,13,14) is the same, as a result of which a dissolved gas remains present in the product (5). A dosing device according to claims 1-2 and BE2023/0003, characterized in that the flexible chamber (14) is made of an elastomer. A dosing device according to claims 1-3 and characterized in that the flexible chamber (14) is provided with a flexible wall that is deformable. A dosing device according to claims 1-4 and characterized in that the closure (16) comprises a cylindrical body with a recess at the bottom, which is deformable and is made of an elastomer. A dosing device according to claim 5 and characterized in that the underside of the closure (16) can be deformed by pressing the activation pin (18), so that the bore (21) is released from the seal (24). A dosing device according to claims 1-6 and characterized in that the bag (4) can be filled with product (5) via the activation pin (18) by pressing it, along which the product (5) moves through the inner chamber ( 13) moves along passage (17) to the flexible chamber (14) and as a result of which the inward pressure deforms the flexible wall of the flexible chamber (14) and thus the product (5) passes along the outer chamber (12) to the channel ( 11) into the bag (4).