CN107720675B

CN107720675B - Container with pressure reducing valve

Info

Publication number: CN107720675B
Application number: CN201710928704.9A
Authority: CN
Inventors: 艾尔伯特·玛丽·沃特斯
Original assignee: Dispack-Projects Nv
Current assignee: Dispack-Projects Nv
Priority date: 2012-04-27
Filing date: 2013-04-25
Publication date: 2020-09-25
Anticipated expiration: 2033-04-25
Also published as: CN107720675A; WO2013159159A3; AU2013252499B2; JP2015520080A; RU2014147691A; AU2013252499A1; EP2841375B1; DK2841375T3; HK1246263A1; EP3153460A1; RU2631174C2; BE1020726A5; CN104428239A; WO2013159159A2; CN104428239B; EP2841375A2; EP3153460B1; JP6279548B2; DK3153460T3

Abstract

The present application relates to a container having a pressure relief valve. Container (100) for a fluid under pressure, the container (100) preferably being a beer keg, comprising a neck (101) and a fitting mounted thereon with a suction tube (33, 34) for sucking the fluid out of the container (100), wherein a pressure relief valve (38) is mounted in the upper end of the suction tube (33, 34) or in the neck (101) of the container (100), which pressure relief valve (38) comprises a closing body (201) which is resiliently mounted via a spring means (202) and which can be moved from a closing position to an open position by the spring means (202) being compressed.

Description

Container with pressure reducing valve

The application is a divisional application of an application with application date of 2013, 25/04, application number of 201380022217.6 and invented name of 'a container with a pressure reducing valve'.

The present invention relates to pressure relief valves, and in particular to pressure relief valves for use in containers or kegs for fluids under pressure, such as carbonated beverages, and in particular beer.

Existing pressure relief valves have the disadvantage of generally not being very compact and comprising a number of components which are difficult to recycle.

It is an object of the present invention to provide a container with a compact and reliable pressure relief valve.

For this purpose, the invention provides a container for fluid under pressure, preferably for carbonated beverages, comprising a fitment with a straw for sucking out the fluid in the container, wherein a pressure relief valve is mounted in the upper end of the straw or in the neck of the container. The pressure relief valve comprises a closing body which is resiliently mounted and can be moved from a closing position to an opening position by a compressed spring.

The embodiment in which the mounting is made in a suction tube has the advantage that the pressure relief valve can be mounted in a convenient manner in the fitting and the container itself does not need to be modified. The embodiment with mounting in the neck may lead to a very compact embodiment, wherein the pressure relief valve may for example be contained or built-in a fitting body provided in the container.

The obturator is preferably resiliently mounted via a spring arrangement such that the spring arrangement is compressed by a pressure above a determined critical pressure to move the obturator from the obturating position to the opening position. When mounted in the suction tube, the pressure relief valve is preferably mounted vertically, i.e. the obturator is vertically movable between a closed position and an open position.

In the case of the embodiment in the suction tube, the upper end of the suction tube is preferably equipped with a cap (cap) having a hole which is sealed by the closing body in the closing position of the closing body. It is noted that the cap may be integrally formed with the straw, but may also form part of a component that is attachable or coupled to or in the straw. For example, the cap may also form part of a housing which is resiliently arranged in or on the straw. The aperture and the obturator are preferably shaped so that the obturator can be pressed outwardly out of the cap. When the pressure relief valve is open, fluid may flow outwardly through the bore. According to an alternative, the upper end of the suction tube is open and the closing body is received in a sealing manner in the open end in the closing position.

The closing body preferably comprises a clamping portion and a spring holder for the spring means, wherein the clamping portion is connected to the spring holder and the spring means acts between the spring holder and the neck of the suction tube or container, such that when the pressure in the container exceeds a critical value, the spring holder compresses the spring means due to the pressure and thus presses the clamping portion outwards. In case a cap is provided on the upper end of the straw, the spring means preferably acts between the spring holder and the cap of the straw.

The obturator preferably comprises a central portion having a first end on which the clamping portion is provided and a second end on which the spring holder is provided, wherein the spring means is a spring arranged around the central portion. The central portion is preferably substantially cylindrical. The clamping portion is preferably integrally formed on the central portion, but it may also be connected to the central portion via a clamping connection. The spring holder preferably extends annularly around the central portion and is preferably provided with an upstanding peripheral wall (peripheral wall) such that the outer end of the spring can be received between the central portion and the upstanding peripheral wall.

According to an advantageous embodiment, the closing body comprises a clamping portion which is sealingly receivable in the opening, wherein the opening and the clamping portion are shaped such that the clamping portion is pressable out of the opening in a direction from the interior of the keg to the exterior of the keg. For example, an opening is provided in the cap on the upper end of the straw or in the neck of the container. The clamping portion preferably has a diverging form, seen in the direction of extrusion, so that the clamping portion can be moved outwardly instead of inwardly. For example, the clamping portion may substantially take the form of a truncated cone or pyramid.

The clamping portion is preferably rotatably mounted between a closed position and an open position, which allows the clamping portion to be moved outwardly out of the opening by rotation. The clamping portion and the opening are preferably rotationally asymmetrical here, so that a rotation of the clamping portion causes an outward movement of the clamping portion. For example, if the clamping portion is equipped with a groove coupled to the screwdriver head, or with another coupling option, the coupling portion can be rotated manually, thereby releasing the pressure in the barrel. In addition to automatically opening the pressure relief valve due to excessive pressure in the container, the pressure relief valve may also be manually opened in this manner. This is particularly useful when the keg is empty and the user can release the pressure where and when it is needed for safety reasons. Viewed perpendicularly from the opening, the clamping portion may, for example, have mutually different width and length dimensions, while the clamping portion has a diverging form, viewed in the direction of extrusion. In this way, the clamping portion can be placed in the open position by turning it through 90 degrees.

According to a possible embodiment, the suction tube is equipped with one or more openings for the passage of the fluid out of the tub, and the pressure relief valve is arranged substantially above the one or more openings.

According to an advantageous embodiment, the pressure relief valve comprises a clamping portion, a spring holder and a spring device. The clamping portion is connected to a spring holder and a spring means acts between the spring holder and the straw or neck portion such that the spring holder presses the clamping portion outwards, in contrast to the action of the spring means, when the pressure in the container exceeds a critical value, for example a value between 5 and 7 bar. The spring holder is preferably a one-piece part, for example manufactured by injection molding, comprising a base and a connecting shaft pointing upwards from the base, which connecting shaft is mounted on or in the clamping part.

For example, for this purpose, the clamping part is provided with a groove into which an outer end of the connecting shaft can be pressed, wherein the shape of the groove and the outer end is such that the connecting shaft is fixed in the clamping part. For example, the connection between the clamping portion and the connecting shaft may be a dovetail connection.

According to an advantageous embodiment, the clamping portion is made of a plastic material that is more compressible than the plastic material of which the spring holder is made. The clamping portion can be manufactured, for example, from an EPDM (ethylene propylene diene monomer) material or an NBR (nitrile butadiene rubber) material, preferably with good sealing properties, while the spring holder can be manufactured, for example, from a harder plastic material, such as PET.

According to an alternative embodiment, the clamping portion and the spring holder are made of the same material. In this case, a separate sealing member may be provided around the clamping portion, for example, a separate O-ring or an overmolded (elastomeric) rubber, which ensures sealing. The clamping portion and the spring holder can then be manufactured from PET material, for example.

According to yet another possible embodiment, the pressure relief valve comprises a housing mounted in a sealed manner in the upper end or in the neck of the suction tube. The housing is equipped with a lower opening at the bottom and an upper opening at the top. The closing portion is elastically mounted in the housing via a spring device, for example, to close the lower opening. Subsequently, the mounting is such that, when the pressure in the container exceeds a determined critical value, the closing part can be pressed out of the lower opening into the housing, while the spring means is compressed. Such critical pressure is for example between 5 bar and 7 bar.

The present application also relates to the following aspects:

1) a container for a fluid under pressure, preferably a beer keg, comprising a neck and a fitting mounted thereon with a straw for sucking the fluid out of the container, characterized in that a pressure relief valve is mounted in the upper end of the straw or in the neck of the container, which pressure relief valve comprises a closing body which is resiliently mounted via spring means and which can be moved from a closing position to an open position by means of the spring means being compressed.

2) Container according to 1), characterized in that the closing body is mounted such that it moves from a closing position to an opening position as a result of a pressure above a determined critical pressure.

3) Container according to 1) or 2), characterized in that the upper end of the drinking straw is equipped with a cap with a hole which is sealed by the closing body in the closing position of the closing body.

4) The container according to any one of the preceding aspects, characterized in that the closing body comprises a clamping portion and a spring holder for a spring means, wherein the clamping portion is connected to the spring holder and the spring means acts between the spring holder and the straw or the neck of the bucket, such that the spring holder presses the clamping portion outwards, in contrast to the action of the spring means, when the pressure in the container exceeds a critical value.

5) The container according to 4), characterized in that the spring means act between the spring holder and the cap of the straw.

6) Container according to 4) or 5), characterized in that the closing body comprises a central part having a first end provided with the gripping part and a second end provided with the spring holder, wherein the spring means is a spring arranged around the central part.

7) The container of claim 6), wherein the gripping portion is integrally formed on the central portion.

8) Container according to 4) -7), characterized in that the spring holder extends annularly around the central part and is equipped with an upstanding peripheral wall, so that the outer end of the spring can be received between the central part and the upstanding peripheral wall.

9) Container according to any of the preceding aspects, characterized in that the closing body comprises a clamping portion which can be received in a sealing manner in an opening, wherein the opening and the clamping portion have a shape such that the clamping portion can be pressed out of the opening from the inside to the outside.

10) Container according to 9), characterized in that the clamping portion has a divergent form in the direction of movement from the closed position to the open position.

11) Container according to 9) or 10), characterized in that the gripping portion takes the form of a substantially truncated cone or pyramid, preferably with circular ribs.

12) Container according to any one of claims 9) -11), characterized in that the clamping portion is rotatably mounted between the closed position and the open position, such that the clamping portion moves outwardly out of the opening during rotation.

13) Container according to any one of claims 9) -12), characterized in that the gripping part and the opening are rotationally asymmetric, such that rotation of the gripping part causes an outward movement of the gripping part.

14) The container according to any one of claims 9) to 13), wherein the pinching portion has a width dimension and a length dimension different from each other, as viewed vertically from the opening.

15) Container according to any one of claims 9-14, characterized in that the gripping part is equipped with a groove or a protrusion intended for coupling with a head of a tool.

16) The container according to any one of the preceding aspects, characterized in that the straw is equipped with at least one opening for the passage of fluid out of the container; and the pressure relief valve is disposed over the at least one opening.

17) Container according to any one of the preceding aspects, characterized in that the closing body comprises a clamping portion and a spring holder, and the spring holder is an integral piece comprising a base and a connecting shaft pointing upwards from the base, the connecting shaft being mounted on or in the clamping portion.

18) Container according to 17), characterized in that the clamping part is provided with a groove into which an outer end of the connecting shaft can be pressed, wherein the shape of the groove and the shape of the outer end are such that the connecting shaft is fixed in the clamping part.

19) Container according to 18), characterized in that the connection between the clamping portion and the connecting shaft is a dovetail connection.

20) Container according to any one of the preceding aspects, characterized in that the closing body comprises a clamping portion and a spring holder, and in that the clamping portion is made of a plastic material which is more compressible than the plastic material of which the spring holder is made.

21) The container according to 20), wherein the clamping portion is made of an EPDM (ethylene propylene diene monomer) material or an NBR (nitrile butadiene rubber) material, preferably having good sealing properties.

22) Container according to any one of claims 1) -19), characterized in that the closing body comprises a clamping portion and a spring holder, and that the clamping portion and the spring holder are manufactured from the same material, and that sealing means are provided around the clamping portion.

23) Container according to any one of claims 20) -22), characterized in that the spring holder is made of PET.

24) A container according to any one of the preceding aspects, wherein the pressure relief valve comprises a housing mounted in a sealed manner within the upper end of the straw or within the neck.

25) Container according to 24), characterized in that the housing is equipped with a lower opening at the bottom and an upper opening at the top, wherein for the purpose of closing the lower opening the closing body is resiliently mounted within the housing such that it can be pressed into the housing when the pressure in the container exceeds a determined critical value.

Drawings

The invention will be further elucidated according to a number of non-limiting exemplary embodiments of the invention, with reference to the accompanying drawings, in which:

FIG. 1A is a schematic cross-sectional view of an embodiment of an S-fitting according to the present invention;

FIG. 1B is an exploded perspective view of the embodiment of FIG. 1A;

FIG. 2A is a schematic cross-sectional view of an embodiment of a type A fitting according to the present invention;

FIG. 2B is a schematic perspective view of the fitting body of the embodiment of FIG. 2A from the top;

FIG. 2C is a schematic perspective view of the suction tube mount of the embodiment of FIG. 2A;

FIG. 2D is a schematic perspective view of a portion of the suction tube of the embodiment of FIG. 2A;

FIG. 3 illustrates a cross-sectional view of an embodiment of a pressure relief valve installed within a straw in accordance with the present invention;

FIG. 4 illustrates a cross-sectional view of an embodiment of a pressure relief valve installed within a straw in accordance with the present invention;

FIGS. 5A and 5B illustrate a cross-sectional view and a perspective view, respectively, of an embodiment of a pressure relief valve installed in a straw in accordance with the present invention;

6A, 6B, and 6C illustrate a perspective top view of a pressure relief valve, a perspective bottom view of a pressure relief valve, and a perspective top view of a pressure relief valve without an obturator, respectively;

FIG. 6D illustrates a perspective view of a portion of the obturator of the embodiment of FIG. 6A;

FIG. 6E shows a perspective view of the spring holder of the embodiment of FIG. 6A;

FIG. 7 shows a cross-sectional view through the embodiment of FIG. 6A;

FIGS. 8A-8C illustrate the embodiment of FIG. 6A in three sequential positions of an obturator;

9A, 9B and 9C show a first alternative embodiment with a pressure relief valve in the neck; and

fig. 10A and 10B show a second alternative embodiment with a pressure relief valve in the neck.

Fig. 1A shows an embodiment of an S-shaped fitting, while fig. 2A shows an embodiment of an a-shaped fitting mounted on a plastic tub 100, only the upper part of the plastic tub 100 with the neck 101 being shown in fig. 2A. Fig. 1A shows only the fitment and not the container. The neck 101 is provided with two thickened neck portions, here in the form of

collars

102, 103 integrally formed with the neck 101 of the tub 100, extending along the periphery of the neck. The tub 100 is typically manufactured by blow moulding (blow moulding), in particular by stretch blow moulding, preferably from one of the following materials: PET material (in particular bottle grade PET), PP material, PE material or PEN material. The latter is typically used for reusable kegs. Those skilled in the art will appreciate that the present invention is equally applicable to so-called disposable tubs, as are reusable tubs. The tub 100 is typically configured to store liquid at a pressure of between 0.25 bar and 10.00 bar, preferably between 0.50 bar and 3.50 bar.

The S-or a-fitting comprises a fitting body 4, 104, respectively (see also fig. 1B and 2B). The fitting body 4, 104 may be attached with two or

more ring segments

106a, 106b forming a ring around the neck 101. The fitting body 4, 104 is equipped along its periphery with profiles 24 (ribs protruding to a greater or lesser extent), 124 (flat), see fig. 1B and 2B, and the two ring segments 106a, 106B are equipped with complementary profiles for non-rotatable positioning. The fitting body 4, 104 is also equipped with a

support flange

5, 105 and is intended for the purpose of receiving different fitting parts, which make it possible, for example, to provide gas while liquid is being drained from the tub. The following assembled components can be distinguished in fig. 1A and 2A or 2B, respectively: a

tube cap

31, 131, a sealing ring 32, 132 for sealing between the fitting body 4, 104 and the neck 101, a

suction tube

33, 34, 133, 134 for sucking out fluid in the tub 100, a suction tube mounting 35, 135,

valve parts

37 and 39 and 137 and 139, a spring means 36, 36', 136 for spring-acting the

valve parts

37 and 39 and 137 and 139, a

pressure reducing valve

38, 138. These are just two embodiments and those skilled in the art will appreciate that the fitting may be configured in other ways. Embodiments of the present invention may be applied to any type of fitting for a drum.

The embodiment shown in fig. 2A and 2B is intended to work with a type a or type G barrel coupling. The embodiment shown in fig. 1A and 1B is intended to co-act with an S-barrel coupling. The keg coupling is a part mounted on the upper side of the fitting and will allow gas inflow while fluid, typically beer, flows out of the keg in order to keep the keg pressurized. In addition to A, G and the S-barrel coupling, there is also D, U and an M-barrel coupling. While those skilled in the art will appreciate that the present invention is equally applicable to these types of fittings, the fittings will be embodied somewhat differently.

Figure 2C shows the straw mount 135 in detail for the a-fitting embodiment. The straw mounting is equipped with a central opening 500 in which the straw portion 133 shown in fig. 2D may be secured. The suction tube mount 135 is also equipped at its periphery with a receiving portion 502 for the tongue 127 (see fig. 2B) of the fitting body 104. Downward-directed tongues 127 are provided on the underside of the fitting body 104 and are each provided with a hole 128, in which hole 128 a projection 501 provided in a receiving portion 502 can engage in each case. In this way, the suction tube mount 135 can be locked into the fitting body 104 on its underside. The suction pipe section 133 is provided with an opening 504 for passage of fluid from the barrel. In the variant of fig. 1A and 1B, the straw portion 33 and the mounting member 35 are made of a single piece in which a resiliently mounted upper member 39 is provided. The upper piece 39 is provided with an opening 54 for the passage of fluid from the tub. The attachment of the mount 35 to the fitting body 4 is similar to the variant of fig. 2A and 2B and will therefore not be described in detail.

Referring to FIG. 1A or FIG. 2A, it is noted that the

pressure relief valve

38, 138 provided at the top of the straw in the illustrated embodiment may also be provided at one or more other locations. For example, many pressure relief valves may be provided against the wall of the fitting body 104 (e.g., at the lower end thereof), wherein a suitable connector must then be provided in the neck 101 of the keg 100. Such an embodiment is shown in fig. 9A-9C and 10A-B.

Figures 9A-9C illustrate a pressure relief valve 700 that includes a housing 703 and an obturator 701 resiliently received therein. Obturator 701 is similar to obturator 601 and will be described in further detail with reference to figures 6A-6E and figure 7. The housing 703 has a vertical pipe section 730 leading to an outlet pipe 731, which outlet pipe 731 can be mounted in the wall of the tub, for example in the neck of the tub as shown in fig. 9B. A seal (e.g., conical seal 732) may be provided between the neck wall and outlet tube 731. Referring to fig. 9B and 9C, one or more pressure relief valves 700 may then be provided in the barrel prior to placement of the fitting body 104, with an outlet tube 731 mounted in the neck wall, e.g., via a conical seal 732. The fitting body 104 may then be placed. The fitting body 104 is advantageously provided with vertical downwardly projecting ribs 129, wherein the vertical tube portions 730 can be received between the vertical ribs 129. These ribs 129 thus provide for further dwell and positioning of the pressure relief valve 700.

Fig. 10A-10B show a further second variation 800 of a pressure relief valve connected via the neck of the keg. Where the pressure relief valve is mounted horizontally in the housing 803 with the outlet tube 831, the outlet tube 831 can be mounted in the tub wall (e.g., in the neck of the tub). A seal (e.g., conical seal 832) may be provided between the neck wall and the outlet tube 831.

Fig. 3 and 4 show two respective embodiments of

pressure relief valves

200, 300 according to the invention, intended to be mounted in the straw of a container of fluid under pressure, typically a beer keg. For example, the container and fitment may be embodied as described above, but may also take different forms. The

pressure reducing valves

200, 300 are installed in the upper end of the suction pipe 133 for sucking out the fluid in the container. The suction pipe 133 is provided with an opening 504 for passage of fluid from the barrel, and the

pressure relief valve

200, 300 is disposed over the opening 504. The upper end of the straw is sealed by a sealing cap 505 having an aperture 506 through which fluid can escape when the pressure relief valve 200 is opened.

In the variant of fig. 3 and 4, the

pressure reducing valve

200, 300 comprises a

obturator

201, 301 and a

spring

202, 302. The

obturator

201, 301 comprises a clamping

portion

210, 310 which is sealingly received in a bore 506 of the obturator cap. The hole 506 and the clamping

portions

210, 310 have a shape such that the clamping portions can be pressed out of the closing tube cap 505 from the inner side of the self-priming tube. For example, the clamping

portions

210, 310 may be conical or pyramidal. The

obturator

201, 301 also includes a

spring holder

212, 312 for the

spring

202, 302. The clamping

portion

210, 310 is connected to a

spring holder

212, 312, and a

spring

202, 302 acts between the

spring holder

212, 312 and the containment cap 505, such that when the pressure in the vessel exceeds a threshold value, the spring holder presses the clamping

portion

210, 310 outward, in opposition to the action of the spring. In this variant, the

spring holder

212, 312 is a one-piece manufacture having a base and a connecting

shaft

211, 311, the connecting

shaft

211, 311 pointing upwards from the base and being attached to or in the clamping portion. In the shown variant, the clamping

parts

210, 310 are provided with

grooves

213, 313, into which

grooves

213, 313 the outer ends 214, 314 of the connecting

shafts

211, 311 can be pressed. The shape of the groove and the outer end is such that the connecting shaft is secured in the clamping portion. In the illustrated embodiment, the connection between the clamping portion and the connecting shaft is a dovetail connection, but those skilled in the art will appreciate that other connections are possible.

In the variant of fig. 3, the clamping part is made of a plastic material that is more compressible than the plastic material of which the spring holder is made, and the clamping part material itself provides the seal. The clamping portion may be made of, for example, EPDM (ethylene propylene diene monomer) material or NBR (nitrile butadiene rubber) material. In a variation of fig. 4, the clamping portion and the spring carrier may be made of the same material, with the sealing ring 304 disposed around the clamping portion. For example, in this case, both the spring holder 312 and the clamping portion 310 may be made of a PET material.

Fig. 5A and 5B illustrate another embodiment of a pressure relief valve 400 according to the present invention. In this embodiment, the pressure relief valve comprises a closing body 401 and a spring 402 housed in a housing 403, the housing 403 being mounted in the upper end of the suction pipe via a sealing ring 404. The housing 403 is provided with a lower opening 430 at the bottom and an upper opening 431 at the top. The obturator 401 is resiliently mounted in the housing by means of a spring 402. The sealing body 401 has a base portion 410 and a shaft portion 411, the base portion 410 being configured to seal the lower opening 430, and the shaft portion 411 being directed upward from the base portion 410 and provided with the spring 402 therearound. The spring 402 acts between the base portion 410 and an upper wall 432 of the housing 403, through which the shaft portion 411 is guided. Thus, when the pressure in the container exceeds a certain threshold, the base portion 410 may be pressed into the housing 403, against the spring action of the spring 402, whereby fluid may escape from the container through the lower opening 430 and via the upper opening 431 and the hole 506.

Fig. 6A-6E, 7 and 8A-8C illustrate yet another embodiment of a pressure relief valve according to the present invention. In this embodiment, the pressure relief valve is mounted in a housing 603 intended to be placed within the upper end of the straw, see also fig. 1A (the housing is designated by numeral 38 in fig. 1A). The pressure relief valve includes a closure 601 resiliently mounted in a housing 603, as best shown in fig. 7. Obturator 601 includes a clamp 610, a connector 611 connected thereto, and a spring holder 612. The connecting piece 611 is provided with a thickened portion 614 at its outer end, which enables the spring holder 612 to be fixedly clamped to the connecting piece 611. For this purpose, the spring holder 612 is provided with a central channel 615. The spring holder 612 is best shown in FIG. 6E and includes a ring 616 connected to the central passage 615 by a plurality of connecting arms 618. A first end of the spring 602 may be received in the spring holder 612 between the inner race 615 and the outer race 616. The other outer end of the spring 602 is supported against the upper wall 630 of the housing 603. The upper wall 630 is also provided with an opening 606 which is closed in the closed position by a clamping portion 610. For a good seal, the clamping portion 610 may be equipped with an O-ring 604. The spring 602 acts between the spring holder 612 and the housing 603. Thus, due to the compression of the spring 602, the obturator 601 will be movable from the obturating position (see fig. 6A) to the opening position (see fig. 8A) due to the high pressure inside the keg. Because the housing 603 is mounted in the straw, the spring 602 therefore acts indirectly between the spring holder 612 and the straw, such that when the pressure in the vessel exceeds a threshold value, the spring holder 12 compresses the spring 602 and the clamping portion 610 is pressed outwardly.

As best shown in fig. 6D, the clamping portion 610 has a diverging form when viewed from the inside of the tub to the outside of the tub. The clamping part 610 also has a width dimension which differs from the length dimension and is equipped on its upper side with a recess 616, here in the form of a groove, in which recess 616 the head of a tool can be received. Thus, rotation of the gripping portion 610 will cause a simultaneous upward movement of the gripping portion. The clamping portion 610 preferably also has rounded corners and a rounded diverging perimeter such that the clamping portion 610 can smoothly rotate from the closed position to the open position. In this way it will also be possible to manually release the pressure, as best shown in fig. 8B and 8C, where two corresponding positions of the clamping part 610 are shown. For example, the clamping portion 610 may be rotated by means of a screwdriver, thereby creating an opening through which pressure may escape from the tub. It should be noted that other shapes are possible instead of the slotted recess 616, wherein a tool with a complementarily shaped head may then be provided for manual opening of the pressure relief valve.

It will be appreciated by a person skilled in the art that the present invention is not limited to the exemplary embodiments shown above, and that many variations are conceivable without departing from the scope of the invention, which is defined solely by the appended claims.

Claims

1. Container for fluid under pressure, comprising a neck and a fitting mounted thereon, the fitting having a suction tube for sucking out fluid in the container, the fitting comprising a fitting body having a lower end attached to the neck, characterized in that a pressure relief valve (700, 800) is mounted at the lower end of the fitting body in abutment with a wall of the fitting body, the pressure relief valve comprising a closing body (701) resiliently mounted via spring means and movable from a closing position to an open position by the spring means being compressed, wherein the fitting comprises a further spring means (36, 36 ', 136) and a valve member (37, 39; 137, 139), the further spring means (36, 36', 136) being arranged to exert a spring action on the valve member (37, 39; 137, 139), the further spring device (36, 36', 136) is different from the spring device (202; 302; 402; 602) of the pressure reducing valve (38; 138; 200; 300; 400).

2. The container of claim 1, wherein the closure is mounted such that the closure moves from a closed position to an open position due to a pressure above a determined critical pressure.

3. Container according to claim 1, characterized in that the upper end of the drinking straw is equipped with a cap having a hole which is sealed by the closing body in the closing position of the closing body.

4. The container according to claim 1, characterized in that the closing body comprises a clamping portion (610) and a spring holder (612) for a spring means (602), wherein the clamping portion is connected to the spring holder and the spring means acts between the spring holder and the straw or the neck of the container, such that the spring holder presses the clamping portion outwards, in contrast to the action of the spring means, when the pressure in the container exceeds a critical value.

5. Container according to claim 4, characterized in that the spring means act between the spring holder and the cap of the straw.

6. Container as claimed in claim 4, characterized in that the closing body comprises a central part having a first end provided with the gripping part and a second end provided with the spring holder, wherein the spring means is a spring arranged around the central part.

7. The container of claim 6, wherein the gripping portion is integrally formed on the central portion.

8. A container according to claim 6, wherein the spring holder extends annularly around the central portion and is provided with an upstanding peripheral wall such that an outer end of the spring can be received between the central portion and the upstanding peripheral wall.

9. Container according to claim 1, characterized in that the closing body comprises a clamping portion which can be received in a sealing manner in an opening, wherein the opening and the clamping portion have a shape such that the clamping portion can be pressed out of the opening from the inside to the outside.

10. A container according to claim 9, wherein the gripping portion has a diverging form in the direction of movement from the closed position to the open position.

11. A container according to claim 9, wherein the gripping portion takes the form of a substantially truncated cone or pyramid.

12. The container of claim 9, wherein the pinch portion is rotatably mounted between the closed position and the open position such that the pinch portion moves outwardly out of the opening during rotation.

13. The container of claim 9, wherein the gripping portion and the opening are non-rotationally symmetric such that rotation of the gripping portion causes outward movement of the gripping portion.

14. The container of claim 9, wherein the gripping portion has a width dimension and a length dimension that are different from each other when viewed vertically from the opening.

15. Container according to claim 9, characterized in that the clamping part is equipped with a groove or a protrusion intended for coupling with a head of a tool.

16. Container as claimed in claim 1, characterized in that the closing body comprises a clamping portion and a spring holder, and that the spring holder is an integral piece comprising a base and a connecting shaft directed upwards from the base, which connecting shaft is mounted on or in the clamping portion.

17. Container according to claim 16, characterized in that the clamping part is provided with a groove into which an outer end of the connecting shaft can be pressed, wherein the shape of the groove and the shape of the outer end are such that the connecting shaft is fixed in the clamping part.

18. The container according to claim 17, wherein the connection between the clamping portion and the connecting shaft is a dovetail connection.

19. The container according to claim 1, wherein said closing body comprises a clamping portion and a spring holder, and said clamping portion is made of a plastic material that is more compressible than the plastic material of which said spring holder is made.

20. The container according to claim 19, wherein the gripping portion is made of EPDM (ethylene propylene diene monomer) material or NBR (nitrile butadiene rubber) material.

21. Container as claimed in claim 1, characterized in that the closing body comprises a clamping portion and a spring holder, and in that the clamping portion and the spring holder are manufactured from the same material, and in that sealing means are provided around the clamping portion.

22. The container of claim 19, wherein the spring holder is made of PET.

23. A container according to claim 1, wherein the pressure relief valve comprises a housing mounted in a sealed manner in the upper end of the straw or in the neck.

24. Container according to claim 23, characterized in that the housing is provided with a lower opening at the bottom and an upper opening at the top, wherein for the purpose of closing the lower opening the closing body is resiliently mounted in the housing such that it can be pressed into the housing when the pressure in the container exceeds a determined critical value.

25. A container for fluid under pressure comprising a neck and a fitment mounted thereon, the fitment having a straw for drawing fluid from the container, characterized in that a pressure relief valve (700, 800) is mounted in the wall or neck of the container, said pressure relief valve comprising a closing body (701), the obturator is resiliently mounted via spring means and is movable from a closed position to an open position by the spring means being compressed, wherein the fitting comprises a further spring device (36, 36', 136) and a valve part (37, 39; 137, 139), the further spring device (36, 36', 136) is arranged to exert a spring action on the valve part (37, 39; 137, 139), the further spring device (36, 36', 136) is different from the spring device (202; 302; 402; 602) of the pressure reducing valve (38; 138; 200; 300; 400).

26. A container according to claim 25, wherein the closure is resiliently received in a housing (703,803) having a tube portion (730) leading to an outlet tube (731) mounted in the wall of the container.

27. A container for fluid under pressure, comprising a neck and a fitting mounted thereon, which fitting has a suction tube (33, 34; 133, 134) for sucking out fluid in the container, characterized in that a pressure relief valve (38; 138; 200; 300; 400) is mounted in the upper end of the suction tube, which pressure relief valve comprises a closing body (201, 301, 401, 601), which is resiliently mounted via a spring means (202, 302, 402, 602) and can be moved from a closing position to an opening position by means of the spring means being compressed, wherein the fitting comprises a further spring means (36, 36 ', 136) and a valve part (37, 39; 137, 139), the further spring means (36, 36', 136) being arranged to exert a spring action on the valve part (37, 39; 137, 139), the further spring means (36, 300, 400) being arranged to exert a spring action on the valve part (37, 39; 137, 139), 36', 136) and the pressure reducing valve (38; 138; 200 of a carrier; 300, respectively; 400) the spring means (202; 302; 402, performing a chemical reaction; 602) different.

28. The container of claim 27, wherein the closure is mounted such that the closure moves from a closed position to an open position due to a pressure above a determined critical pressure.

29. The container according to claim 27, wherein the upper end of the straw is equipped with a cap having a hole that is sealed by the closure in the closed position of the closure.

30. The container according to claim 27, wherein the straw (133, 134) has an outer wall equipped with at least one opening (504) for the passage of liquid out of the container; and the pressure relief valve is disposed over the at least one opening.

31. Container according to claim 27, characterized in that a valve member (39) is resiliently mounted in the suction tube (33, 34), the valve member (39) having an outer wall provided with at least one opening (54) for the passage of liquid out of the container; and the pressure relief valve is disposed over the at least one opening (54).

32. The container according to claim 30 or 31, wherein the fitment comprises a fitting component capable of providing a gas while liquid is being discharged through the at least one opening (504, 54).

33. The container according to claim 27, characterized in that said closing body comprises a clamping portion (610) and a spring holder (612) for a spring means (602), wherein said clamping portion is connected to said spring holder and said spring means acts between said spring holder and said straw or the neck of said container, so that said spring holder presses said clamping portion outwards, in contrast to the action of said spring means, when the pressure in said container exceeds a critical value.

34. The container of claim 33, wherein the spring means acts between the spring holder and the cap of the straw.

35. The container of claim 33, wherein said closure comprises a central portion having a first end provided with said gripping portion thereon and a second end provided with said spring holder thereon, and wherein said spring means is a spring disposed about said central portion.

36. The container of claim 35, wherein the gripping portion is integrally formed on the central portion.

37. The container of claim 35, wherein the spring holder extends annularly about the central portion and is provided with an upstanding peripheral wall such that an outer end of the spring can be received between the central portion and the upstanding peripheral wall.

38. The container of claim 27, wherein the closure comprises a gripping portion sealingly receivable in an opening, wherein the opening and the gripping portion are shaped such that the gripping portion can be pressed out of the opening from the inside to the outside.

39. A container according to claim 38, wherein the gripping portion has a diverging form in the direction of movement from the closed position to the open position.

40. A container according to claim 38, wherein the gripping portion takes the form of a substantially truncated cone or pyramid.

41. The container of claim 38, wherein the pinch portion is rotatably mounted between the closed position and the open position such that the pinch portion moves outwardly out of the opening during rotation.

42. The container of claim 38, wherein the gripping portion and the opening are non-rotationally symmetric such that rotation of the gripping portion causes outward movement of the gripping portion.

43. The container of claim 38, wherein the gripping portion has a width dimension and a length dimension that are different from each other when viewed vertically from the opening.

44. Container according to claim 38, characterized in that the clamping part is equipped with a groove or a projection intended for coupling with a head of a tool.

45. Container as claimed in claim 27, characterized in that the closing body comprises a clamping portion and a spring holder, and that the spring holder is an integral piece comprising a base and a connecting shaft directed upwards from the base, which connecting shaft is mounted on or in the clamping portion.

46. Container according to claim 45, wherein the clamping part is provided with a groove into which an outer end of the connecting shaft can be pressed, wherein the shape of the groove and the shape of the outer end are such that the connecting shaft is fixed in the clamping part.

47. The container of claim 46, wherein the connection between the gripping portion and the connecting shaft is a dovetail connection.

48. The container of claim 27, wherein the closure comprises a gripping portion and a spring holder, and wherein the gripping portion is made of a plastic material that is more compressible than the plastic material from which the spring holder is made.

49. The container according to claim 48, wherein the gripping portion is made of EPDM (ethylene propylene diene monomer) material or NBR (nitrile butadiene rubber) material.

50. The container according to claim 27, wherein said closing body comprises a gripping portion and a spring holder, and wherein said gripping portion and said spring holder are made of the same material, and wherein sealing means are provided around said gripping portion.

51. The container of claim 48, wherein the spring holder is made of PET.

52. A container as claimed in claim 27, in which the pressure relief valve comprises a housing which is mounted in a sealed manner in the upper end of the straw or in the neck.

53. Container as claimed in claim 52, characterized in that the housing is provided with a lower opening at the bottom and an upper opening at the top, wherein for the purpose of closing the lower opening the closing body is mounted resiliently in the housing such that it can be pressed into the housing when the pressure in the container exceeds a determined threshold value.