DE1943546A1 - Valve for aerosol container - Google Patents

Description

. FR. THAX.MANN

- ^ O H. SCHMITT 78 FREIBURG I. BR. _File j ₆ g _m

^ ₁ . «^ U. xx. ovjxijjiJ-x J. KAHLSTRASSE 23 φ / Μύ · / rli

PATENT LAWYERS phone 32199 1 / Pir / aX SoIfrene SoPoAo »Corsico, Casella Postale 22, Italy

Aerosol container valve

The invention relates to a valve for aerosol containers with a suction tube or passage with reduced Cross-sections

It is known that aerosol containers or cans, which are provided for receiving "products" in an embodiment or mixture on an aqueous basis ₍ the solvent of the product or the like being formed by water, require the use of a valve which has a suction tube or a passage with a reduced cross-section in order to minimize the initial splash of liquid propellant gas, which cannot be emulsified in water inside the tube, when the product is distributed and emptied ,.

The use of a suction pipe or a passage with a reduced cross-section reduces on the one hand within acceptable limits Limits the loss of propellant gas in the liquid state, but on the other hand this has the disadvantage that the filling process of the container or the can through the

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Valve and the associated suction pipe or the passage with reduced cross-section through outwardly slowly and thereby is made uneconomical.

Attempts have already been made to remedy this disadvantage by radial holes were provided in the valve body, which are normally closed by a rubber ring, which is deformed during the filling of the container under the pressure of the introduced gas and thus exposes the perforations and allows the gas to be introduced into the container through these holes and thus in a much greater flow rate, than this is made possible by the suction pipe or by the passage with reduced cross-section · When the introduction pressure if it is not used, the rubber ring contracts again due to its elasticity and closes the Perforations, whereby the normal operation of the valve is restored. However, this workaround has the problem not solved satisfactorily because the solvents, which are often present in the product, act on the rubber, whereby this swell up and to such an extent can be deformed that the closure of the perforations in the valve body is prevented or no longer guaranteed in the long run thereby allowing undesirable gas leakage.

The invention proposes, in a valve of the above-mentioned, Kind of a device to proceed, which is the fast filling of the container and which sweckdiemlieh and effective

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-3-

sam works without a gradual destruction over the course to be exposed to time. In particular, the valve for aerosol containers according to the invention is characterized in that that at least one opening is provided in the valve body and the valve body in connection with this opening on the outside a flexible tab or the like carries which in the normal state is held by its own elasticity with the free end in a position in which it opens the opening at least partially closed, this free end of the opening under the influence of the propellant gas during the filling of the container with this gas can be lifted and the Then releases opening.

For a better understanding, the invention is shown below with the aid of the accompanying drawings in some merely exemplary, the invention is described in detail without limiting embodiments. It shows:

Fig. 1 is an elevational view partially in section of the valve body for an aerosol container, which is provided with a device according to the invention is,

Pig. Figure 2 is a cross section taken along line 2-2 in Pig. 1, Pig. 3 shows a partially sectioned view of a modified device according to the invention in elevation,

Pig. Figure 4 is a cross section taken along line 4-4 in Pig. 3, Pig. Figure 5 is a cross section taken along line 5-5 in Pig. 3,

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Pig. 6 is a partially sectioned view in elevation of a further modification of the inventive concept Contraption,

Pig. Figure 7 is a cross section taken along line 7-7 in Pig. 6, Pig. 8 shows a partially sectioned elevation

the.

View of a further modification corresponding to the invention Contraption,

Pig. Figure 9 is a cross section taken along line 9-9 in Pig. 8th, Pig. 10 shows a partially sectioned view of a differently modified embodiment according to the invention in elevation,

Pig. Figure 11 is a cross section taken along line 11-11 in Pig. 10, Pig. 12 is an elevation view, partly in section, of another embodiment of the device according to the invention;
Pig. Figure 13 is a cross section taken along line 13-13 in Pig. 12th

In the pig. 1 and 2 you can see that in the cylindrical Wall 1 of a valve body 2 has a radial perforation 3 provided is. On the lower thin part 4 of the valve body is

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a ring fastened in a press fit, which carries a narrow, resilient tab or plate 6, which is in a conical shape Head 7 ends. With 8 and 9 the usual holes for the passage of the gas are referred to, which are also in the known Valves are provided and are therefore of no relevance to the present invention.

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-5-The operation of the device described is as follows:

In the normal state, the tab 6 is held tightly in the hole 3 by its own elasticity, so that it completely closed with its conical head 7. When the container is filled, the propellant gas that enters the moves Chamber 10 of the valve enters, due to its pressure, the conical head 7 away from the hole 3, whereby there is the elasticity

or ·· overcomes the spring force of the thin tab 6 and consequently by ·

not only the narrow bores 8 and 9 but also through the deletion 3 of a much larger cross-section in the BJehält. enters, whereby the pulling is very quick. If the The container is filled, the pressure of the gas decreases and thereby the flap 6 reverses due to its own elasticity back into the starting position, the hole 3 being closed again with the conical head 7. The valve is now ready for the usual draining or dispensing of the product in the container, the perforation 3 because of the higher Pressure inside the container remains permanently closed.

The ring 5 with the associated resilient tab or the like.

can be made of metal or suitable plastic material

In the variants according to FIGS. 3 to 5, instead of the narrow Hole 9 an elongated incision 11 in the outer surface

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-6-surface of the valve body 2 in connection with the perforation 3

• -

standing below this. The rest of the device is identical to that according to Pig. 1 and 2, accordingly, the same reference numbers have been retained for the same parts. The way of working is therefore also identical.

In the pig. 6 and 7 a modified embodiment is shown in which instead of the perforation 3 in the annular wall 1 of the valve body 2, an incision or a recess 12 with the cross section of an approximately isosceles trapezoid is provided. A ring 13 held in a press fit is provided on a suitable seat surface on the outer surface of the valve body 2 and carries a small tab 14 of rectangular cross-section, which is embedded in snap-in spacing in the incision 12 or the recess and partially closes it. The part of the incision not closed by the small flap 14 exercises the punctures of the narrow bore 9 of the embodiment according to Pig. 1 and 2 from _above

During the filling phase of the container, the gas pressure inside the chamber 10 causes the flap 14 to curve or bends, as a result of which the passage cross section for the gas in the incision 12 is enlarged. At the end of / this operation returns the tab 14 due to its elasticity in the starting

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-7 position back.

In the embodiment according to the Pig. 8 and 9, the ring 15 is in turn attached to the thin part 4 of the valve body 2 and carries a thin, "flexible tab 16, which partially closes a longitudinal recess 17 provided in the wall 1, with only a small passage cross-section 18 left uncovered is. During the phase of filling with gas on the small tab 16 flexes outwardly, thereby increasing the passage cross-section for the gas.

In the pig. 10 and 11 an embodiment is shown at which in turn the narrow perforation 9 is provided in the wall of the valve body 2. In this case there are four Lo-. chungen 19 provided in the bottom of the valve body and on a suitable seat on the outer surface of the wall 1 of the valve body 2, a ring 20 is fastened in a press fit, which carries a flexible disc 21 which normally forms the connection between the perforations 19 and the interior of the container " locks. Under the influence of the pressure of the gas with which the container is filled, it bends Disc or this Plansch 21 and gives a gap for the passage of the gas between the outer surface of the thinner part 4 of the valve body and the edge of the disk ring 21 itself free. When the gas filling is finished

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is det, the disc 21 returns to its closed position return.

Finally, an embodiment is shown in FIGS. 12 and 13, in which in the wall .1 of the valve body 2 two longitudinal notches 22, 23 are provided, \ Äche form a rib 24. Because of these notches, the wall 1 is weakened to such an extent that when Filling the container with the propellant gas, the pressure of this gas in the chamber 10, the wall at these weakened points tears or breaks open, whereby a small tab 24 is released, which bends outward under the action of the gas and a passage between the chamber 10 and the container releases. When the action of the gas has ended, the tab 24 returns to its original position; self although the wall 1 in the area of the notches 22 and 23 is not runs more continuously, the flap 24 closes the passage between the interior of the container and the chamber 10 in FIG sufficient dimensions.

This embodiment just described differs from the previous ones in that in this case the Heine Tab or plate is integrally connected to the valve body.

Although only a few embodiments of the invention have been shown, it is obvious that numerous variants and

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Modifications of it are possible without departing from the inventive idea itself.

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Claims (8)

-10- claims M7) Valve for aerosol containers with a suction tube or -passage with reduced cross-section, d u r eh. marked that in the valve body (2) at least one opening (3, 11, 12, 17, 19) is provided and the valve body (2) in connection with this opening on the outside a narrow flexible tab (6, 14, 16, 21, 24) or the like. which in the normal state by their own elasticity with their free End is held in a position in which it closes the opening at least partially, this free The end of the opening can be lifted off under the influence of the propellant gas while the container is being filled with this gas and then releases the opening. 2. Valve according to claim 1, characterized in that the tab (6, 14, 16, 21) or the like. of a ring (5, 13 »15, 20) is carried, which on the valve body (2) is attached. 3. Valve according to claim 1, characterized in that the tab or the like. is integrally connected to the valve body. 009817/1282 4 · Valve according to one of the preceding claims, characterized in that the opening (3) has the shape of a has radial perforation. 5. Valve according to one of claims 1 to 3t, characterized in that that the opening (11, 12, 17) has the shape of a longitudinal depression or recess. 6. · Valve according to claim 5 »characterized in that the recess (12) has a trapezoidal cross-section and the tab (14) have a rectangular cross-section. 7. Valve according to one of claims 1 to 3 _f, characterized in that the opening is provided as an axial perforation (19) in the wall on the lower part of the valve body (2) and the small tab or the like. is in the form of a flexible flange or washer rim integrally connected to the ring (20). 8. Valve according to one of claims 1 to 3 _f, characterized in that a tongue or tab in the form of a rib (24) is provided in front of the pressure ring of the valve, which by two weakening longitudinal notches (22, 23) in the wall (1) of the Valve body (2) is formed, and that the 009817/1292 opening when filling the container by breaking open the weakening cuts in the wall of the valve body can be produced under the influence of gas pressure. Patent attorney 0098 17/1292