KR20130064773A - Metering valve for pressurized vial - Google Patents

Abstract

According to the invention, the metering chamber 7 is fixed to a part of the valve body 9 located inside the vial in the mounted state by its upper end, the inlet passage is provided to contact the metering chamber with the inside of the vial and the outlet The passage makes contact with the metering chamber and the outside of the valve, the inlet closing means is provided to close the inlet passage when the valve element 4 is in the open position, and the outlet closing means when the valve element 4 is in the closed position. It is provided to close the outlet passage. Moreover, the valve element can be moved past the open position to a third position called the short-circuit position, and a third passage called the short circuit passage is provided to contact the inside of the vial and the outside of the valve and A short circuit closing means is provided for closing the short circuit passage when the valve element 4 is in the closed position or the open position.

Description

Metering valve for pressurized vials {METERING VALVE FOR PRESSURIZED VIAL}

The present invention relates to a valve body in which a valve element is slidable, a metering chamber, and in a mounted position in which the metering chamber is in contact with the inside of the vial in a mounted state on the vial and is isolated from the outside of the vial and the metering chamber is isolated from the inside of the vial A metered valve for a pressurized vial comprising means for moving the valve element between an open position in contact with the outside of the vial.

The metering valve of the invention is aimed at pressurized vials. Metering devices for valves of pressurized vials are commonly used to deliver a predetermined amount of product. The product to be dispensed is in a vial containing a propellant gas. The product is contained in a flexible pouch either in direct contact with the propellant gas or immersed in the propellant gas.

Various types of metering devices for valves of pressurized vials are known.

For example, document EP 1 099 647 A1 proposes a metering device with a metering chamber located downstream of the valve, which lies on the rod (stem) of the valve of the vial. The metering chamber is constituted by a cylinder in which the piston slides. The bottom of the cylinder is provided with an orifice in direct contact with the outlet of the valve stem. The piston is also provided with an orifice that is continued by an axial tube that slides in a protective element with a second valve. In order to withdraw a batch of product, it is necessary initially to move the cylinder of the metering chamber down so that the cylinder is supported on the valve stem to open the valve stem. Pressurized product from the valve of the vial enters the metering chamber by pushing the plunger upward. The product also penetrates into the tube leading to the outlet valve of the protective element. Once the metering chamber is full, the cylinder is returned to the stop position to close the valve of the vial. The valve of the safety element can now be actuated by pushing into a conventional diffuser. In order to move the cylinder down to fill the metering chamber, it is necessary to rotate the ring in which two inclined guide grooves are formed and the two peripheral projections of the cylinder are inserted. Thus, when the protrusion is on top of the groove of the ring, the cylinder is in a high position and is not supported on the valve stem of the container. In contrast, when the cylinder is in a low position, the cylinder is translated downwards to be supported on the rod to open the valve of the vial. Therefore, in order to take out a batch, it is necessary to first turn the ring once to fill the metering chamber and then turn again to close the valve of the vial. It is then necessary to press the diffuser located on top of the protective element to open the second valve. Such a device is not very easy to use. Moreover, this requires two different valves.

Document EP 0 642 992 A1 discloses a metering device for mounting in an opening in the neck of a container containing a product to be dispensed. The metering device is provided with a valve comprising a metering chamber and a stem. In the first position of the stem, the metering chamber is in contact with the inside of the container and filled with a given amount of product. In the second position of the stem, the metering chamber is isolated from the inside of the container and in contact with the outside to allow the product contained therein to be released. For this purpose, the metering chamber is delimited in the axial direction on one side by the annular valve seal and also on the other side by the annular chamber seal. The stem penetrates both seals. It comprises a first distribution channel arranged in an axial direction which is opened downwardly and upwardly by two radial openings. It comprises a second distribution channel arranged axially with a radial opening on one side oriented towards the first channel and an axial opening on one side of the free end of the stem. In the rest position held by the spring, the stem is positioned such that the upper opening of the first channel is located in the metering chamber between the two seals while the radial opening of the second channel is closed by the valve seal. The lower opening of the first channel opens the inside of the vial. In this position, the metering chamber is filled with the product contained in the container through the first channel as soon as the vial is turned upside down. If the user presses the stem against the force of the spring, the radial opening is displaced. The upper opening of the first channel is closed by the chamber seal while the radial opening of the second channel is opened into the metering chamber. The product mixed with the propellant gas is discharged from the metering chamber via the second channel under the influence of pressure. Such a device needs to flip the vial for use.

Document DE 79 14 704 U1 discloses a metering device formed by a recess in which the metering chamber is closed by an elastic wall. Depending on the model, the recess has a hemispherical or diabolo shape. The elastic wall is under pressure in the pressurized vial. As soon as the metering chamber is placed in contact with the outside, the resilient wall is pushed back into the recess to initiate the release of its contents.

Document FR 1 503 684 A discloses a metering device for mounting on a valve body in a vial. The device is provided with a metering chamber open into the valve body. In order to produce ready-to-use vials, it is necessary to fill the container with the desired liquid, secure the valve and then introduce the gas via the outlet passage. An opening is provided in the tube connecting the metering chamber to the valve body. This opening is surrounded by an elastic sleeve that expands under the influence of pressure to allow gas to escape inside the vessel.

No vial presented makes it possible to introduce the product into the vial via the valve, as is typically the case with a vial with a simple valve. Similarly, none of these vials withdraw more than is conveyed by the metering chamber except for several successive actuations of the valve.

It is an object of the present invention to develop a metering device for a valve of a pressurized vial which can be filled via a valve, even if a metering chamber is provided. Another object of the present invention is to be able to withdraw a batch defined by the metering chamber as well as a batch different from that imposed by the metering chamber without having to operate the valve several times. A third object is to enable the use of the same valve for a vial with head up draw and a vial with head down draw.

This object, on the one hand, is fixed to a part of the valve body located inside the vial with the metering chamber mounted by its upper end, the inlet passage is arranged to contact the metering chamber with the inside of the vial and the outlet passage is By contacting the outside of the valve, the inlet closing means being provided to close the inlet passage when the valve element is in the open position, and the outlet closing means being provided to close the outlet passage when the valve element is in the closed position. Is achieved. Moreover, the valve can be moved past the open position to a third position called the short-circuit position, and a third passage called the short circuit passage is provided to contact the inside of the vial and the outside of the valve, The short circuit closing means is provided to close the short circuit passage when the valve element is in the closed position or the open position. In the short circuit position, it is possible to withdraw a larger amount of product than imposed by the volume of the metering chamber. Similarly, vials can be filled via this short circuit passage.

The inlet closing means and / or the outlet closing means are preferably in the closed position when the valve element is in the short circuit position unless the short circuit passageway passes through at least part of the inlet passage and / or the outlet passage. Similarly, the short circuit passage preferably contacts the inside of the vial and the outside of the valve without passing through the metering chamber.

Preferably, the inlet closure means and the outlet closure means are independent of each other.

In a preferred embodiment of the invention, the inlet passage comprises at least one hole formed in the wall of the valve body in an area in contact with the inside of the vial or pouch, an orifice formed in the wall located in the valve body, and an orifice formed in the wall of the metering chamber. And the inlet closure means has the shape of a cylindrical tenon and is constituted by the lower end of the valve element whose radial cross section corresponds to the internal dimension of the orifice of the wall such that the tenon is directed to the orifice when it enters this orifice. The seal is closed and the wall preferably has the shape of a collar which terminates in a funnel shape oriented towards the metering chamber. In order to improve the sealing of the inlet closure means, it is preferable to place the sealing means, preferably the annular ring, under the orifice formed in the wall. Thus, when the tenon comes into contact with the orifice in the wall of the valve body, it also supports against the annular ring.

The outlet passage is preferably formed in the orifice formed in the wall of the metering chamber, the orifice formed in the wall located in the valve body, the lower center channel and the upper center channel formed in the valve element and separated from each other by the barrier, the wall of the valve element At least one orifice contacting the inside of the upper center channel with the outside of the valve element, and at least one orifice formed in the wall of the valve element and contacting the inside of the lower center channel with the outside of the valve element, the contact passageway Is provided to contact the orifices or orifices with the orifices or orifices, the outlet closing means is constituted by a chamber seal constituted by an annular wall in which the valve element is slidable, and an inner surface of the chamber seal is formed in an upper center channel or Formed in the orifices and the lower center channel At least one annular groove having a height at least equal to the vertical distance separating the orifices or orifices, the orifices or orifices of the upper center channel and / or the orifices or orifices of the lower center channel are annular walls when the valve is in the closed position It is closed by the inner surface of the to close the outlet passage, the orifice or orifices of the upper center channel and the orifice or orifices of the lower center channel open into the annular groove when the valve is in the open position to open the outlet passage.

The metering chamber comprises a cylinder whose end opposite to the valve body called the lower end is closed by a radial wall called the lower radial wall and the end oriented towards the valve body called the upper part is closed by a radial wall called the upper radial wall; It is preferred that the piston be slidable between these two radial walls in the cylinder to define the metering volume.

In this case, the upper radial wall of the metering chamber may be provided with an opening, the piston is slidable between the two radial walls of the cylinder, and a spring is provided between the lower radial wall of the metering chamber and the piston, In the absence, the piston can be returned against an upper radial wall with an opening.

In order to be able to introduce the piston into the metering chamber, on the one hand the cylinder forming the metering chamber and on the other hand its upper radial wall and / or its lower radial wall are composed of different parts which can be assembled or separated from one another. And means for securing the wall on the cylinder is preferably provided.

In order to separate the propellant gas and the product, it is possible to weld the flexible pouch on the valve body to enclose the metering chamber, the inlet, the outlet and possibly the beginning of the short circuit path. Thus, if a pouch is provided, the inlet, outlet, and possibly short circuit passageways open upstream and into the pouch, not the vial. With this pouch, the valve can be used regardless of the position of the vial.

In practice, the valve element may be constituted by a first cylindrical wall called an upper cylindrical wall forming a first axial channel called an upper channel and a second cylindrical wall forming a second axial channel, 2 Two axial channels are isolated from each other by a barrier, the upper channel is opened by an axial opening at its upper end and by at least one radial opening which is opened onto the outer surface of the valve element on the side of the barrier and the lower channel is Opened by an axial opening at its lower end and by at least one radial opening which opens onto the outer surface of the valve element on the side of the barrier, the valve element preferably having its movement towards the outside or inward within the valve body. At least one annular stop may be provided on its circumference to limit it.

Correspondingly, the valve body may be provided with a chamber seal disposed within the valve body such that in the closed position of the valve, the radial holes or holes of the upper channel of the valve element are located in the vicinity of the chamber seal and thereby closed, an annular stop The portion is sealingly supported against this chamber seal.

When the valve must be able to short circuit the metering chamber, preferably, the valve element is provided with a third cylindrical wall at least partially surrounding and concentric with the first cylindrical wall to form an annular channel, the annular channel Is isolated from the other two and has a so-called axial opening at its upper end, wherein at least one radial hole contacts the inside of the annular channel and the outside of the valve element. In this case, the valve body and the valve element are dimensioned such that the valve element can be moved past the open position to a position called a short circuit position, the valve body having a valve seal disposed opposite the metering chamber with respect to the chamber seal. And the valve seal is such that, in the mounted state of the valve, the radial holes or holes of the annular channel are outside of the vial in the closed position of the valve, and the radial holes or holes of the annular channel are positioned toward the valve seal and the valve seal is in the open position of the valve. By or out of the vial, closed and positioned so that the radial holes or holes of the annular channel at the short circuit location of the valve are located on the side of the valve seal opposite the outside.

At least one side channel is provided on the outer surface of the valve body, the side channel being opened inwardly of the valve body between the valve seal and the chamber seal and a first opening that is opened inwardly of the vial or pouch. Second openings may be provided. If the valve is equipped with a flexible pouch, the flexible pouch is welded to the valve body such that the side channel or channels contact the inside of the pouch and the inside of the valve body between the valve seal and the chamber seal so that the side channel or channels Surround the first opening of the field.

The invention is described in detail below using the exemplary embodiments shown in the drawings below.
1 is a cross-sectional side view showing the metering valve as a whole.
2 is an exploded view of the metering valve.
3 is an enlarged cross-sectional front view (a) and side view (b) of the valve in the closed position.
4 is an enlarged cross-sectional front view (a) and side view (b) of the valve in the open position.
5 is an enlarged cross-sectional front view (a) and side view (b) of the valve in the short circuit position.
6 is a perspective view (a) and a cross-sectional view (b) of the spacer.
7 is a perspective view (a) and a cross sectional view (b) of the chamber seal.
8 is a perspective view (a) from above and a perspective view (b) from below of the cover of the metering chamber;
9 is a perspective view (a) from above and a bottom view (b) from below of the metering chamber.
10 is a perspective view (a) from above, a perspective view from below (b), a cross sectional front view (c), a side cross-sectional view (d), and a perspective view (e) looking down.
11 is a cross-sectional front view (a), a cross-sectional side view (b), and a perspective view (c) of the stem.
12 is a perspective view (a) from above of the piston, a perspective view (b) from below, and a sectional view (c).

For clarity, spatial references such as "bottom" and "top" or "vial inside" and "vial outside" are used. It should be noted that the valves are manufactured and sold independently of the vials and that the guards must contain the valves alone, especially without vials. Thus, these references are made on the basis of the valve since the valve is intended for use in assembling the valve on the vial in which the valve is positioned above the vial. This does not prevent the valve from being used in the inverted position, ie in the position where the valve is under the container, or in any other position.

The valve 1 is intended to be secured to a rigid vial, not shown, by a fastening means such as cup 2. A seal called the outer seal 21 is provided between the vial neck and the cup 2 to ensure sealing. Typically, the valve 1 is fixed to the dome 22 of the cup 2.

The valve 1 is essentially

A valve body 9 attached to the dome 22 of the cup 2;

A valve element called a conventional stem 4 positioned in the valve body 9 and capable of axially moving between a closed position and at least a first open position therein;

A spacer 3;

Two inner seals 5a, 5b; And

-Metering chamber (7)

It is composed by.

The valve generally includes an inner pouch 11 that allows the product to be separated from the propellant gas.

The valve body 9 is intended to be fixed to the dome 22 of the cup 2 and is constituted by an upper portion 91 in the form of a cylinder-shaped ring. An inner valve seal 5a is arranged between the front face of this upper portion 91 and the bottom of the dome 22 to ensure a seal. This sealing is improved due to the tapered shape of the front face of this upper part 91.

The upper ring 91 of this valve body 9 is extended by a body portion 92 which is substantially cylindrical.

An axial channel 95 penetrates through the body portion 92. This channel is divided into an upper section and a lower section with a central orifice and separated by an inwardly oriented radial collar 98. The upper section is provided with two sets of radial ribs oriented towards the center of the axial channel 95. The first set of radial ribs 96 on one hand forms a stop for the second inner seal, referred to below as the chamber seal 5b and described below, and on the other hand, a slide guide for the stem 4. do. The second set of radial ribs 97 further forms a stop for the shoulder of the stem 4. The first set of ribs 96 is positioned above the second set 97. The product can circulate between the ribs. The free end of the first set of ribs 96 oriented toward the center is located farther from the central axis of the valve body than the free end of the second set of ribs 97.

Two radial orifices 99 are formed in the wall of the body element 92, over the collar 98 located in the valve body. This collar 98 is extended by a funnel shaped portion 981 that is tapered downward.

The outer surface of the valve body 9 has two radial fins 93. These pins have a V-shaped cross section in the radial plane of the valve body and the V-shaped wings are supported almost tangentially on the cylindrical portion of the body element 92. These two pins 93 are disposed opposite each other and are hollow. Thus, in each fin 93 there is formed a side channel 931 which is open at the lower part (side opposite the upper ring) and closed at the top. Each channel 931 has an orifice 94 open in its upper portion, slightly below the upper ring 91 but above the seating for the inner chamber seal 5b into the upper section of the axial channel 95. It is provided. The orifice 94 contacts each channel 931 located in the pin and the space located in the upper ring 91.

The flexible pouch 11 is fixed on the outer surface of the body portion 92, for example by welding. The pouch 11 is closed on all sides and can only communicate with the outside through the valve. Such pouches can separate the product from the propellant gas located outside the pouch. However, progress is completely possible without a pouch.

The stem 4 has a substantially cylindrical outer shape, the first cylindrical wall 41 forming an upper center channel 42 opened at the upper end by the axial opening and the lower opening at the lower end by the axial opening. A second cylindrical wall 44 forming a central channel 442. The two central channels 42, 442 are isolated from each other by the barrier 43. The second cylindrical wall forms a cylindrical tenon 44. The upper portion of the outer surface of the tenon has a circular shoulder 441, ie on the side of the barrier 43. The inner diameter of the narrow portion of the funnel 981 corresponds to the outer diameter of the tenon 44 of the stem 4.

A first set of two radial holes 45 are formed in the first wall 41 of the stem 4 near the lower end of the central channel 42. Thus, these first radial holes 45 contact the inner side of the central channel 42 and the outer surface of the stem 4. Similarly, the second cylindrical wall forming tenon 44 is opened at the top thereof near the barrier 43, by a second set of two radial holes 443. These two radial holes open over shoulder 441.

The stem 4 is further provided with a third cylindrical wall 46 concentric with and surrounding the first wall 41 to form an annular channel 47 concentric in the upper center channel 42. This annular channel 47 is opened by its axial orifice at its upper end and closed towards the bottom. Its length is such that the first radial hole 45 does not penetrate it. The third set of two radial holes 48 penetrates through the third cylindrical wall 46 to contact the inside of the annular channel 47 and the outside of the stem 4. This third set of holes 48 is opened above the first and second sets of holes 45, 443.

The stem 4 is further provided with two circular stops 49a, 49b located on its outer circumference. The outer diameter of the first stop 49a substantially corresponds to the diameter of the cylinder formed by the inner end of the first portion of the rib 96 of the axial channel 95 of the valve body 9. The outer diameter of the second stop 49b substantially corresponds to the inner diameter of the spacer 3. The first stop 49a is located below the second stop 49b.

In the assembled state, the stem is located in the valve body in the axial channel 95 through which it can move. The movement of the stem is limited between two limit positions, namely the upper or closed position and the lower or short circuit position. Downwards, i.e. in short circuit position, movement is limited by the first stop 49a which is supported on the upper part of the second set of ribs 97, while upwards, ie in the closed position, Is limited by a second stop 49b which is supported against an inner valve seal 5a located in the dome 22 of the cup 2. In this position, movement is also limited by the first stop 49a which is supported on the inner chamber seal 5b.

The spacer 3 is formed by a hollow cylinder with radial ribs 31 outwardly oriented in its upper part.

The metering chamber 7 is fixed on the valve body 9, preferably by suitable means in the lower section. The metering chamber consists essentially of the bottom portion 72 and the cover 71 on which the piston 73 slides. This piston is under pressure of the spring 74 (only the end coil is shown) which tends to push the piston against the cover 71 without further effort.

The cover 71 of the metering chamber consists essentially of a radial wall 711 with a central opening 712 and two cylindrical walls 713, 714. First cylindrical wall 713 extends radial wall 711 downward. A second cylindrical wall 714 concentric with the first cylindrical wall extends upwardly around the central opening 712 of the radial wall 711. In the mounted state, the upper end of the second cylindrical wall 714 is preferably connected to the lower surface of the funnel shaped portion 981 of the valve body, with the annular ring 717 or any other suitable sealing means inserted. Will be supported. A third cylindrical wall 715 concentric with the first and second cylindrical walls and surrounding the second cylindrical wall receives the fixing means of the chamber 7 on the valve, preferably on the lower end of the valve body. It is provided to. In the example shown here, the fixing means, on the one hand, are two radial tenons of arc shape lying on the outer surface of the valve body 9 and at their lower ends, and the inner surface of the third cylindrical wall 715. It is constituted by two radial shoulders 718 positioned at the top of the and directed towards the center. In the assembled state, the two tenons of the valve body are fitted behind the two shoulders 718 of the third radial wall of the cover of the metering chamber. The seal is reinforced by the presence of the annular ring 717.

The bottom 72 of the metering chamber is constituted by the cylindrical wall 721 closed at the bottom by the radial wall 723. The inner diameter of the cylindrical wall 721 of the bottom portion 72 substantially corresponds to the outer diameter of the first cylindrical wall 713 of the cover 71. These two elements of the metering chamber can be connected to each other by any suitable means. In the example shown here, they have the shape of an arc and are uniformly distributed on the periphery of the cylindrical wall 721 of the bottom portion 72 and the first cylindrical wall of the cover 71. 713 and tenon 723 are connected by an equal number of shoulders 716 fitted behind. Of course, as a possible alternative, this is the radial wall of the metering chamber separate from the rest of the metering chamber.

The piston 73 consists essentially of a fully radial wall 731 fixed on the cylindrical ring 732 (thus there is no passage opening unlike the valve of EP 1 099 647 A1), and the spring 74 is such a It is inserted into the cylindrical ring and supported on the bottom surface of the radial wall, or, if shown here, on radial ribs 733 shorter than the cylindrical ring 732 and extending from the radial wall. The shoulders 734 formed on the outer surface of the cylindrical ring 732 provide a seal between the piston 73 and the inner surface of the cylindrical wall 721 of the bottom 72 of the metering chamber. The air contained in the bottom 72 below the piston 73 is compressed when the chamber is filled.

The annular valve seal 5a lies in the bottom of the dome and between it and the top surface of the valve body.

The chamber seal 5b lies inside the axial channel 95 of the valve body and is supported on the top surface of the first set of ribs 96. It is held in this position by the spacer 3. The chamber seal 5b has an annular shape. Its outer diameter corresponds to the inner diameter of the axial channel 95 on the first set of ribs 96. Its inner diameter corresponds to the outer diameter of the stem 4 at the first radial hole 45 and the second radial hole 443. On its inner surface, the chamber seal 5b has two parallel radial grooves 51b and 52b positioned up and down. The height of the lower groove 51b is greater than or equal to the axial distance separating the first radial hole 45 from the second radial hole 443 of the stem. In practice, it will be possible to eliminate the second radial groove 52b which has no role. Its presence is justified for reasons of simplification of the valve assembly, which can be mounted in any way on the valve body, since the part is symmetrical about the radial center plane.

In the fitted state of the valve, the metering chamber 7 is fixed on the lower section of the valve body 9, from bottom to top. The stem 4 is valve body 9, one side of which is pushed back to the upper position by a spring 8 which is supported on the shoulder 441 of the stem 4 and the other side is supported on the upper surface of the collar 98. Is located within. The chamber seal 5b is blocked in the axial channel 95 between the top of the first set of ribs 96 and the spacer 3 which itself lies in the upper portion of the axial channel 95. Finally, the upper ring 91 of the valve body is fixed to the cup 2, for example by inserting and fixing a valve seal 5a surrounding the upper section of the stem 4. Such a seal in particular ensures a seal between the area located below and the area located thereon.

Inlet passages and outlet passages are provided to allow the product contained in the pouch 11 or vial to enter and exit the metering chamber, and the inlet closure means and the outlet closure means within the input passageway and the outlet passage, if necessary, to close them. For each. When each closing means is open, the inlet passage makes contact with the inside of the pouch, or the inside of the vial with the metering chamber in the absence of the pouch, while the outlet passage makes contact with the inside of the metering chamber and the upper center channel 42 of the stem. .

The inlet passage is formed by the inlet orifice 99 formed in the valve body, the orifice formed by the funnel shaped portion 981 of the collar 98 of the valve body and the second cylindrical wall 714, and then the cover 71 of the metering chamber. It is constituted by an orifice 712. The inlet passage is clearly visible for example in FIG. 3B, which is indicated by the arrow. The closure means of this inlet passageway is an annular ring and the tenant-shaped lower end of the second cylindrical wall 44 of the stem which will seal close the opening of the funnel shaped portion 981 of the valve body when the stem 4 is sufficiently lowered. 717. The closure of the inlet passage by the input closure means can be clearly seen in FIGS. 4b and 5b.

The outlet passageway comprises an orifice 712 of the cover 71 of the metering chamber, a second cylindrical wall 714, a funnel shaped portion 981 of the collar 98 of the valve body, a lower center channel 442 of the stem, It consists of an orifice formed by two sets of radial holes 443, a first annular groove 51b of the chamber seal 5b, a first set of radial holes 45 and an upper center channel 42. The outlet passage is clearly seen in FIG. 4B, which is indicated by the arrow. The means for closing the outlet passage is a chamber which closes the outlet passage by forming a hermetic barrier between these two sets of holes once the two sets of radial holes 45, 443 are no longer aligned with the first annular groove 51b. It is comprised by the inner surface of the cylindrical wall of the seal 5b. The closure of the outlet passage can be clearly seen in FIGS. 3b and 5b.

When the valve is in the closed position, the radial hole 48 of the third cylindrical wall 46 of the stem is located above the valve seal 5a, ie outside the valve. The radial hole 45 located at the bottom of the upper center channel 42 faces the upper groove 52b of the chamber seal 5b (or against the wall of the chamber seal closing it if there is no second annular groove). ), While the second radial hole 443 is positioned towards the lower groove 51b. Thus, the two sets of radial holes are isolated from each other and there is no communication between the lower center channel 442 and the upper center channel 42 of the stem 4. The tenon 44 of the stem is inserted into the orifice of the collar 98 but does not contact the bottom of the funnel shaped portion 981 and the annular ring 717. Thus, the passage between the inside of the pouch 11 and the metering chamber is opened. This passage is a radial hole 99 called an inlet orifice, followed by a space located between the funnel shaped portion 981 of the collar 98 and the lower end of the tenon 44, and finally the central orifice 712 of the cover of the metering chamber. Through).

In this position, the product placed in the pouch and compressed by a gas located outside of it, for example at about 8 bar, penetrates through the orifice 99 into the axial channel 95 and the tenon 44 Passing the funnel-shaped portion 981 past the periphery of the end) passes the central orifice 712 of the cover 71 of the metering chamber by pulling the piston 73 against the operation of the spring 74. On one side of the valve body, the product goes over the lower axial channel 442 of the stem to fill the lower section of the valve body. However, it is blocked in the valve body by the chamber seal 5b and in the stem inside the bottom groove 51b of the chamber seal. The product cannot come out of the valve, but the metering chamber is filled.

When the valve is actuated, ie when pressure is applied to the upper part of the stem, the stem moves downward. In order to empty the metering chamber, the stem is designed to be lowered to an intermediate position between the high or closed position and the low or short circuit position.

In this intermediate position, the stem is lowered such that the radial hole 48 of the third cylindrical wall of the stem is again positioned above the valve seal 5a. Like the radial hole 443 located in the upper part of the lower center channel 442, the radial hole 45 located in the lower part of the upper center channel 42 of the stem is located towards the lower annular groove 51b and Therefore, they communicate with each other. The lower end of the tenon 44 now enters the funnel shaped portion 981 of the collar, thus sealingly closing the central orifice of the collar.

In this position, the product can no longer enter the metering chamber from the pouch (or vial), which means that the inlet passage between the inlet radial hole 99 and the metering chamber is in the closed closure of the center hole of the collar by the tenon 44. Because it is closed by. In contrast, when the metering chamber is in contact with the outside, the pressure drops and the spring 74 pushes the piston 73 back to the upper part of the metering chamber. Thus, the product is released. It first passes through a channel formed in the second cylindrical wall 714 of the outlet opening 712 and the cover 71, ascends into the lower channel 442 of the tenon 44, and passes through the hole 443 of the tenon. It circulates in the lower groove 51b of the chamber seal 5b, passes through a hole 45 located in the lower portion of the upper center channel 42 of the stem and rises above it to reach the outside of the valve. Only the amount of product placed in the metering chamber can be released in this way. At maximum, during the first use, the amount of material needed to fill the unused space formed by the passage located in the lower center channel 442 and the upper center channel 42 is lost. During subsequent use, since this unused space has already been filled with the product, the volume released corresponds exactly to the volume of the metering chamber 7.

When the pressure on the valve is released, the spring 8 presses the stem 4 upwards, the stem returns to its initial position and the metering chamber is filled again.

Regardless of the position of the stem, the product contained in the pouch can enter the side channel 931 of the pin 93 of the valve body and pass through its orifice 94 between the valve seal 5a and the chamber seal 5b. Note that it penetrates into the space located at. However, this space is hermetically closed and the product contained therein does not exit.

In some cases, this bypasses the metering chamber 7, which may be useful, for example, to take very large batches. In this case, it is possible to apply a fairly large pressure on the upper surface of the stem to force the stem to descend to the lowest position beyond the aforementioned intermediate position. In this case, the radial hole 48 of the third cylindrical wall 46 of the stem passes under the valve seal 5a, which is in contact with the inside of the valve body. Radial holes 45 point toward the lower grooves 51b of the chamber seal, while radial holes 443 are located near the first and second sets of ribs 96 and 97. Thus, the upper center channel 42 and the lower center channel 442 are again isolated from each other. Tenon 44 is inserted more and more into the funnel shaped portion of collar 98 to maintain a sealing closure of the center hole of the collar.

In this limit position, the inlet and outlet passages are closed and the metering chamber is not only isolated from the pouch 11 but also from the outside, which cannot be filled or emptied. Alternatively, the product contained in the pouch (or vial) exits through the valve via the side channel of the pin. It is pressed into the side channel 931 of the pin 93, passes through an orifice 94 which contacts the top of the channel 931 and the inside of the upper ring 91, enters into the ring, and the rib of the spacer 3. Passes between the 31, passes through a hole 48 formed in the third cylindrical wall 46 of the stem, and exits through the annular channel 47.

It should also be noted that it is also possible to fill the pockets during the manufacture of the pressurized vial in the lowest position to short circuit the metering chamber.

If a short circuit location is not required, it is possible to eliminate the third cylindrical wall 46 of the stem and the side channel 931 of the valve body even though the pin can be maintained to facilitate welding of the pouch 11. Thereafter, the stem moves only between the high closed position and the intermediate opening position, which then becomes the second end position.

Moreover, the pouch is not essential. The product can be removed directly from the vial. Thus, the valve can be used upside down (so that the valve lies under the vial). However, if it must be used in the normal position (the valve is on the vial), a plunger tube must be provided which is connected to the side channel 931 of the pin and the radial opening 99 of the lower section of the valve body.

In the illustrated embodiment, the radial holes 45, 443, 48, 99 are provided in pairs. Of course, it would be possible to have only one at a time or alternatively to have more than two.

In particular the metering valve of the invention in combination with the pouch 11 can be used in any position. The presence of a spring 74 that restrains the piston 73 ensures quick and complete delivery of the product from the metering chamber. Since the metering chamber is filled from the top via the route used to release the product, there is no problem of emptying between use even if the pouch is not used.

1 Metering Valve 11 Soft Pouches
2 cups 21 outer ring
22 Dome 3 spacer
31 Outwardly oriented radial rib 4 stem
41 First cylindrical wall 42 Upper center channel
43 Barrier 44 Second cylindrical wall / tenon
441 Round shoulder 442 Lower center channel
443 second set of radial holes 45 first set of radial holes
46 3rd cylindrical wall 47 annular channel
48 third set of radial holes 49a first stop
49b second stop
5a valve seal 5b chamber seal
51b Lower annular groove 52b Upper annular groove
7 Weighing Chamber 71 Cover
711 Radial Wall 712 Center Orifice
713 first cylindrical wall 714 second cylindrical wall
715 3rd cylindrical wall 716 Bottom fixing shoulder
717 annular ring 718 shoulder strap
72 Bottom 721 Cylindrical Wall
722 Radial Walls 723 Tenan
73 piston 731 radial wall
732 Cylindrical Ring 733 Radial Rib
734 shoulder 74 piston spring
8 Stem Spring 9 Valve Body
91 Upper ring 92 Body part
93-pin 931 side channel
94 hole 95 axial channel
96 Ribs of the first set 97 Ribs of the second set
98 color 981 funnel shape part
99 radial holes

Claims (15)

In a mounted position and in a closed position in which the valve element 4 is slidable in the valve body 9, the metering chamber 7, and in a mounted state on the vial, the metering chamber 7 contacts the inside of the vial and is isolated from the outside of the vial. In a metered valve 1 for pressurized vials comprising a means for moving the valve element 4 between an open position in which the metering chamber 7 is isolated from the inside of the vial and in contact with the outside of the vial,
The metering chamber 7 is fixed by its upper end to a part of the valve body 9 located inside the vial in the mounted state, and the inlet passages 99, 981, 714, 712 contact the inside of the vial and the metering chamber. Outlet passages 712, 714, 442, 443, 51b, 45, 42 contact the metering chamber and the outside of the valve, and the inlet closure means when the valve element 4 is in the open position. Is provided so as to close the outlet passage when the valve element 4 is in the closed position, the valve element can be moved past the open position to a third position called the short circuit position, Third passages 931, 94, 31, 48, 47, referred to as short circuit passages, are provided to contact the inside of the vial with the outside of the valve, and the short circuit closing means 5a is provided with the valve element 4 in the closed position. Or close the short circuit passage when in the open position. The metering valve (1), characterized in that. Metering valve (1) according to claim 1, characterized in that the short circuit passage makes contact with the inside of the vial and the outside of the valve without passing through the metering chamber. The inlet closure means and / or outlet closure means of claim 1, wherein the inlet closure means and / or outlet closure means are in the closed position unless the short circuit passageway passes through at least a portion of the inlet passageway and / or the outlet passageway. Metering valve (1) characterized in that. Metering valve (1) according to any one of the preceding claims, characterized in that the inlet closing means and the outlet closing means are independent of each other. 5. The inlet passage according to claim 1, wherein the inlet passage is located in the valve body 9, at least one hole provided in the wall of the valve body in the region in contact with the inside of the vial or pouch 11. It consists of an orifice provided in the wall 98 and an orifice 712 provided in the metering chamber 7, the inlet closing means having the shape of a cylindrical tenon 44 and having a radial cross-section orifice in the wall 98. Configured by the lower end of the valve element corresponding to the internal dimension of the tenon sealingly closes the orifice when the tenon enters this orifice, and the wall 98 is preferably funnel shape 981 oriented towards the metering chamber 7. Metering valve (1), characterized in that it has the shape of a collar (98) terminated at Metering valve (1) according to any of the preceding claims, characterized in that the sealing means, preferably the annular ring (717), lies under an orifice provided in the wall (98). The outlet passage according to any of the preceding claims, wherein the outlet passage is provided with an orifice 712 provided in the metering chamber 7, an orifice provided in the wall 98 located in the valve body 9, a valve element ( 4) the lower center channel 442 and the upper center channel 42 provided within and separated from each other by the barrier 43, provided in the wall of the valve element and contacting the inside of the upper center channel 42 with the outside of the valve element. At least one orifice 45 and at least one orifice 443 provided in the wall of the valve element 4 and contacting the inside of the lower center channel 442 and the outside of the valve element 4. The contact passage 51b is provided to contact the orifice or orifices 443 with the orifice or orifices 45 and the outlet closing means is provided by a chamber seal 5b constituted by an annular wall in which the valve element is slidable. And the inner surface of the chamber seal 5b is upper At least one annular groove 51b having a height at least equal to the vertical distance between the orifice or orifices 45 provided in the shim channel 42 and the orifice or orifices 443 provided in the lower center channel 442. The orifice or orifices 45 of the upper center channel and / or the orifice or orifices 443 of the lower center channel are closed by the inner surface of the annular wall when the valve is in the closed position to close the outlet passage and The orifice or orifices 45 of the upper center channel and the orifice or orifices 443 of the lower center channel are opened into the annular groove 51b when the valve is in the open position to open the outlet passage. Valve (1). 8. The metering chamber of claim 1, wherein the metering chamber has an end opposite to the valve body called the lower end, closed by a radial wall 722 called the lower radial wall and oriented towards the valve body called the upper end. An end portion includes a cylinder 721 closed by a radial wall 711 called an upper radial wall, and a piston 73 is slidable between these two radial walls within the cylinder 721 to define the metering volume. Metering valve (1), characterized in that. 9. The upper radial wall 711 of the metering chamber is provided with an opening 712, and the piston is slidable between the two radial walls 722, 711 of the cylinder. And a spring 74 is provided between the lower radial wall 722 of the metering chamber and the piston 73 to push the piston against the upper radial wall 711 with the opening in the absence of other restraints. Metering valve (1). 10. The cylinder 721, on the one hand, and the upper radial wall 711 and / or its lower radial wall 722, on the one hand, can be assembled or separated from each other. Metering valve (1), characterized in that it consists of separate parts, which means (716, 723) are provided for fixing the wall on the cylinder (721). The flexible pouch (11) according to any one of the preceding claims, wherein the flexible pouch (11) is welded to the valve body (9) to enclose the metering chamber (7) and the beginning of the inlet, the outlet, and optionally the short circuit path. Metering valve (1) characterized in that. The first cylindrical wall (41) according to any one of the preceding claims, wherein the valve element (4) is called an upper cylindrical wall, which forms a first axial channel (42) called an upper axial channel. ) And a second cylindrical wall 44 forming a second axial channel 442, the two axial channels being isolated from each other by a barrier 43, the upper channel 42 being at its upper end. At least one radial opening 45 opened on the outer surface of the valve element by an axial opening and on the side of the barrier 43, the lower channel 442 being opened by an axial opening at its lower end. And opened by at least one radial opening 443 that opens on the outer surface of the valve element on the side of the barrier 43, wherein the valve element preferably has at least one annular stop 49a, 49b on its circumference. Is provided within the valve body (9) Or metering valve (1), characterized in that for limiting its movement towards the inside. 13. The valve element (4) according to any one of the preceding claims, wherein the valve element (4) is provided with a third cylindrical wall (46) at least partially surrounding and concentric with the first cylindrical wall (41) to form an annular channel ( 47, wherein the annular channel 47 is isolated from the other two and has an axial opening at its end, referred to as the top, wherein at least one radial hole 48 is valved inside the annular channel 47. In contact with the outside of the element, the valve body 9 and the valve element 4 are dimensioned such that the valve element 4 can be moved past the open position to a position called a short circuit position, and the valve body 9 The valve seal 5a is provided opposite the metering chamber and the valve seal 5a has a radial hole or holes 48 in the annular channel 47 in the valve mounted state, outside the vial in the closed position of the valve. In the annular channel in the open position of the valve The radial hole or holes 48 are positioned toward the valve seal 5a and closed by the valve seal, or out of the vial, and are radial holes or holes of the annular channel 47 at the short circuit position of the valve ( Metering valve (1), characterized in that 48 is positioned on the side of the valve seal (5a) facing the outside. 14. The valve body (9) according to claim 12 or 13, wherein the valve body (9) is provided with a chamber seal (5b) disposed in the valve body (9) so as to be a radial or hole in the upper channel (42) of the valve element in the closed position of the valve. Metering valve (1), characterized in that it is located near the chamber seal (5b) and closed by the chamber seal, and the annular stop (49a) is hermetically supported against this chamber seal (5b). The valve according to any one of claims 1 to 14, wherein at least one side channel (931) is provided on the outer surface of the valve body (9), and the side channel (931) is mounted in vials or pouches in a mounted state. Metering valve (1), characterized in that there is provided a first opening opening inwardly of 11) and a second opening (94) opening inwardly of the valve body between the valve seal (5a) and the chamber seal (5b).

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