Valve, preferably a venting valve

Abstract

A valve, preferably a venting valve, for a pressure sprayer, having a union nut and a rotation cap, and also a pin which is connected to the rotation cap and slides within an opening in the union nut, and a spring surrounding the pin, wherein the pin has a helix or helical line. The invention is characterized in that a force generated by an air pressure and applied to a pressure surface of the pin moves the latter upward, and, in addition to an axial movement, a rotational movement of the pin, and thus also of the rotation cap, takes place, which is generated by the helix or the helical line of the pin.

Description

[0001] Valve, preferably vent valve

[0002] The invention relates to a valve, in particular a vent valve for a spray device, in particular a pressure spray device with a union nut or rotary cap and a bolt which is connected to the union nut or rotary cap, and a spring which surrounds the bolt, wherein the bolt has a helix or screw line.

[0003] According to the current state of the art, safety valves are primarily used in pressure sprayers. They release air from the container when the operating pressure is exceeded, thus preventing the pressure from being exceeded. State-of-the-art safety valves consist of a sealing bolt and a spring. The air pressure within the pressure vessel exceeds the spring force, thus pushing the bolt linearly out of its sealing position in the event of excess pressure. As soon as the maximum permissible operating pressure is reached again, the spring force exceeds the force of the air pressure within the pressure vessel, and the bolt moves linearly back into a sealing position.

[0004] This venting process can also be triggered by a manual, usually manual, linear pull or push on the bolt. Additionally, an external pressure gauge is often mounted on another opening on the pressure vessel to inform the operator of the current operating pressure.

[0005] The problem with the current state of the art is that the space around the axially moving bolt is severely limited due to the pressure sprayer's pouring funnel. On the one hand, the vent valve must be protected by the pouring funnel if the pressure sprayer tips over or falls down, but on the other hand, it makes it difficult for the operator to pull axially on the bolt to trigger the venting process. This means that manually triggering the safety valve is only possible with an unfavorable finger position and usually requires the use of at least two fingers. The current state of the art also describes how the safety valve can also be used as a pressure gauge. If the safety valve is used as a pressure gauge, a separate opening is created in the container for this purpose. Each opening in the container represents a potential stress point in the container that must be reinforced with material.

[0006] Another option for a vent valve is a recess provided in the pouring funnel from which approximately 20% of the circumference of a circle is visible and accessible. As soon as manual blowing is required, the circular element can be set in a rotating movement using a finger, thus releasing the sealing surface and initiating the escape of air from the pressure vessel. As soon as the circular element is released again, a built-in mechanism, usually in the form of a spring, ensures that the circular element automatically rotates back to its original position and the sealing surfaces are sealed again. The current pressure in the pressure vessel can only be determined with the help of another mounted pressure gauge. Furthermore, it is only audible and not visible whether the vent valve is currently functioning as a safety valve and releasing excess pressure.

[0007] A typical pressure gauge used is known from US 11268863 B2 and is mounted in an additional opening in the pressure vessel.

[0008] Safety valves are already known from WO2021 / 040668. WO 2015 / 013299 A2 shows a valve with a union nut and a rotary cap, as well as a spring surrounding a bolt. A helical pattern in a recess around a piston axis is also shown in WO 2015 / 013299 A2. It is also known from WO 2015 / 013299 that a rotary piston can assume two different end positions. This is purely an indicator, i.e., an axial piston moves the rotary piston into a position that can be distinguished by a window as "low" and "high" positions.

[0009] In contrast to WO 2015 / 013299 A2, according to the invention, the corresponding axial piston has the additional property of acting as a pressure relief valve in a specific position. Such a function is not apparent from WO 2015 / 013299. A further advantage of the present invention is the manual venting of the pressure vessel. By rotating the rotary piston to a specific position by the user, the component can act as a vent valve, as shown, for example, in Fig. 3c of this application.

[0010] DE 102010017998 A1 discloses a pressure vessel, in particular a pressure spray device, wherein the pressure vessel can be filled with a spray medium up to a liquid level, as well as a receptacle, which is arranged in particular in a lid of the pressure vessel. The pressure spray vessel according to DE 102010017998 A1 is characterized in that a connection, in particular a compressor connection, is rotatably or pivotably connected to the receptacle.

[0011] WO 2022 / 229484 A1 also relates to a pressure sprayer with a piston that can be used to build up pressure in the container. A vent valve is not shown in WO 2022 / 229484 A1.

[0012] GB 686887 A shows a valve with a pointer, wherein the pointer interacts with a scale on a rotary cap in such a way that information about a container pressure of a container is provided with the aid of a scale.

[0013] The invention is based on the object of providing a valve that overcomes the disadvantages of the prior art and, in particular, allows convenient venting of the pressure vessel while simultaneously allowing the current operating pressure to be determined at any time. The operator should have the option of manually releasing the operating pressure at any time. Furthermore, the valve should reliably prevent the maximum operating pressure in the pressure vessel from being exceeded. To minimize the number of openings in the vessel and the number of individual parts, the pressure gauge and the safety valve should form a single unit.

[0014] According to the invention, this object is achieved by a valve, preferably a vent valve, having the features of claim 1. Further developments of the invention are the subject of subclaims.

[0015] Because the invention comprises a bolt that has a helix or screw line, the bolt is moved linearly, preferably upwards, by a rotary movement of the rotating cap. The helix converts the linear movement of the bolt into a rotary movement and thus runs along a helix. This arrangement enables a finely metered movement. A further advantage of this arrangement is that it prevents the elastic seal of the valve from seizing after a long period of inactivity of the device, which becomes noticeable in the form of increased static friction. With the help of a helical movement of the valve piston, thrust forces are also applied to the seal of the piston. The helical movement can overcome the static friction better than with a purely axial movement of the piston.

[0016] The valve according to the invention, in particular a vent valve, functions both as a manual vent valve and as a safety valve when a maximum permissible operating pressure is exceeded, reliably releasing the excess pressure. By providing a scale, a position indicator, or a pointer to display the current operating pressure on the union nut or the rotary cap, the operator is simultaneously informed of the current operating pressure. When pressure builds up, the rotary cap rotates automatically, thus indicating the current operating pressure via the pointer on the scale. In a further developed embodiment of the invention, the spring surrounding the bolt exerts a spring force such that the bolt is pushed downward.

[0017] To refill the pressure vessel, the pressure vessel must be manually depressurized before opening the filling opening. To ensure convenient manual venting, the process should ideally be possible with as little force as possible and while wearing gloves. It is therefore advantageous that manual venting of the pressure vessel is initiated by turning the rotary cap on the valve, as this movement can also be performed while wearing gloves.

[0018] To release the pressure, the rotating cap can be rotated. The rotating cap moves both in a rotary motion and axially to the rotation. At a certain angle of rotation, the axial displacement releases the sealing surface, allowing the air to escape from the container. Gloves are often worn when working with a pressure sprayer, so it should be ensured that it can be operated even when wearing gloves. A rotating motion can also be achieved with just one finger and while wearing gloves.

[0019] In order to be able to release the excess pressure not only manually but also independently, a preferred embodiment provides that when the air pressure in the pressure vessel increases, an axial force acting opposite to the spring force is applied and the bolt is lifted upwards and preferably set in a rotational movement by the helix. In particular, the air pressure presses linearly on a bolt surface that is held in position by the spring. When the bolt moves, the sealing surface is released and air can escape. At the same time, in a preferred embodiment, the axial movement is converted into a rotational axial movement so that the operator can visually see which pressure level the pressure vessel is currently at.In order to be able to recognize at any time in which direction of rotation the manual venting is initiated, an arrow is shown on the circumference of the vent valve, which signals the direction of rotation.

[0020] In order to be able to visually recognize the operating status, at least one scale element or scale element and one pointer element are present on the vent valve with the purpose of interacting to display the current pressure level.

[0021] To be able to detect this pressure level, it is advantageous if the pointer has several operating positions, which, using the scale or scales, provide information about the pressure in the vessel. Ideally, this pointer is analog and thus continuously variable, allowing for the detection of a trend.

[0022] If you want to see the current pressure level from all sides, it's advantageous to have the scale or scale element mounted on the circumference of the vent valve. Since such vent valves are usually round, the rounded surface around the axis on the union nut is ideal.

[0023] To ensure quick and reliable identification of the current pressure level even in poor lighting conditions, the scale or scale element is highlighted in signal colors. Likewise, different color highlighting of the scale depending on the current pressure level is advantageous to clearly communicate to the operator whether the container is depressurized, at operating pressure, or releasing air due to overpressure.

[0024] It is particularly preferred if the bolt of the valve is guided in a cavity, preferably a bore of the venting valve, in particular of the valve body. The bolt preferably comprises a sealing ring, which preferably in a first position lies tightly against the wall of the cavity, so that a blow-off of the air blown into the pressure vessel is not possible. In a further developed embodiment of the invention, the bolt is raised in such a way that the seal no longer lies tightly against the wall of the cavity or bore, so that an air channel is opened, through which the air introduced into the vessel escapes when a certain pressure is exceeded. The valve, in particular the pressure valve, is preferably located in a pressure vessel, preferably a pressure spray container, preferably a pressure spray device as

[0025] - vent valve

[0026] - Safety valve

[0027] - Pressure gauge

[0028] Use.

[0029] In addition to the valve, in particular the vent valve, the invention provides a container, in particular a pressure container with such a valve, preferably a vent valve.

[0030] The compact design of the valve according to the invention, in particular of the venting valve, enables simple assembly and installation even in confined spaces, such as may exist between a container and the filling funnel of a spray device. In a valve according to DE 10 2010 017 998 A1, the venting process is initiated by axially displacing the piston upwards. Due to the limited installation space, particularly in conjunction with a compressor connection, there is insufficient space for a valve according to DE 10 2010 017 998 A1 in containers according to the prior art for an axial initiation of a venting process in a spray device. In contrast, initiating venting through a rotary movement, as in the invention, is independent of the available installation space above the valve in a container, which is why installation is possible even in confined spaces.In one preferred embodiment, the individual components of the valve are assembled without screw connections. Only the valve itself is screwed to the container. This prevents the unintentional loosening or loosening of a screw connection within the valve.

[0031] The pump of the pressure sprayer is preferably an axial piston pump which has a pump handle at the upper end. In addition to the pumping function, the handle also serves to transport the container. For this purpose, in one embodiment of the invention the handle is locked with two bolts, each under a hook on the pump housing or piston housing screwed into the container. In one embodiment of the invention a coil spring can be placed between the handle and piston rod to ensure that the bolts sit firmly under the hooks. In the embodiment shown in this application half shells were used to lock the piston in the piston housing and to achieve a spring effect. The half shells each have a ramp-shaped, spring-loaded tab which is pressed through the bolts under the hooks of the piston housing when the handle is turned.Upon further twisting, the ramp-shaped tabs snap back and lock the handle with its bolts under the hook. By turning the handle back, it can be released from the locking position. The resistance of the tabs is adjusted by the spring action to prevent accidental reversal. This design, with half-shells featuring ramp-shaped, spring-loaded tabs, eliminates the need for an additional component that provides the spring action.

[0032] The invention will now be described with reference to the drawings and without limitation thereto.

[0033] They show:

[0034] Fig. 1a: Valve in pressureless position Fig. 1b: Valve in a position with applied operating pressure

[0035] Fig. 1c: Valve in one position with applied overpressure

[0036] Fig. 2: Pressure vessel of a sprayer with built-in valve and built-in pump, especially hand pump

[0037] Fig. 3a: Sectional view of a valve in pressureless position

[0038] Fig. 3b: Sectional view of a valve with applied operating pressure

[0039] Fig. 3c: Sectional view of a valve under overpressure

[0040] Fig. 4: Illustration of the individual components of the pump, in particular

[0041] Hand pump inserted into a container as shown in Fig. 2.

[0042] Fig. 5a - 5c: Detailed views of the half shell

[0043] Fig. 6a - 6b: Pump handle inserted into the pump, which is locked to the pump housing by means of the half shells.

[0044] Fig. 1a shows a vent valve 90 according to the invention. This is a three-dimensional view of a valve according to the invention, in particular in the form of a pressure valve 90 with a rotating cap 106 connected to a bolt 109. The union nut 100 is marked with a scale 101 with highlights representing three different pressure levels. The first level 103 informs the operator that a spray device 40, into which the valve 90 according to the invention is inserted, is depressurized. The second level 104, as shown in Fig. 1b, shows that the pressure vessel 41, into which the valve according to the invention is inserted, is ready for operation. The last and third level 105, as shown in Fig. 1c, indicates to the operator that the pressure vessel 41, into which the valve is inserted, is about to vent due to excess pressure or is currently venting.The pointer 102 is part of the rotating cap 106 and indicates to the operator which of the three pressure levels the sprayer, which houses the pressure valve, is currently in. The operator knows that when the pointer 102 is horizontally aligned with the first level 103, the pressure vessel can be safely refilled because there is no pressure acting on it.

[0045] Fig. 1b shows that the air pressure in the container applied to the pressure surface 107, as shown in Fig. 3b, has rotated the rotary cap 106, and the pointer 102 is now horizontally aligned with the scale 101 at the second pressure level 104. The pressure surface 107 is shown, for example, in Figs. 3a, 3b, and 3c. In this position, the operator knows that the sprayer 40, into which the pressure valve 90 is inserted and which is shown in Fig. 2, is ready for operation. During use of the pressure sprayer, the operator can use the scale 101 to see at any time how the pressure in the pressure container 41 is changing, i.e., whether it is increasing or decreasing.

[0046] Fig. 1c shows the pointer 102 horizontally aligned with the third pressure stage 105. The pressure vessel 41, into which the pressure valve is inserted, has reached and / or exceeded its maximum operating pressure, so that pressure is released to avoid overpressure. By manually turning the rotary cap 106, for example directly on the pointer 102, the pressure can be released from the pressure vessel not only automatically, but also manually at any time. The manual rotation of the rotary cap 106 is a continuous movement. The arrow 110 on the rotary cap 106 shows the operator the direction of rotation. According to the invention, the rotary cap 106 is self-rotating due to the internal spring 108 and, in the depressurized state, strives for horizontal alignment of the pointer 102 and the first stage 103.

[0047] A typical application of the vent valve 90 according to the invention is shown in Fig. 2. The vent valve 90 is screwed into a pressure vessel 41 of, for example, a spray device 40. By unscrewing the pump 42 in the depressurized state, spraying agent, for example, can be introduced into the pressure vessel through the pump opening 43. After screwing in the pump 42, the pressure vessel 41 is brought to operating pressure. As soon as the maximum pressure is exceeded, the valve 90 automatically releases the excess pressure and emits an acoustic signal. Operation with the pressure spray device 40 can begin. The operator can determine the current pressure level via the pointer 106, as shown in Figs. 1a - 1c. The pump 42 inserted into the pressure vessel 41 is, without limitation, a hand pump comprising a pump handle with which a pump plunger, as shown in Fig. 4, can be moved in a pump housing to build up pressure.

[0048] Figs. 3a-3c show a sectional view of the vent valve according to the invention in different pressure states. The vent valve is designed such that the bolt 109 is connected to the rotary cap 106 for all positions shown in Figs. 3a-3c.

[0049] Fig. 3a corresponds to Fig. 1a and shows a section through the valve, in particular the pressure valve, in the depressurized state, i.e. when no pressure has yet built up in the pressure vessel into which the pressure valve is inserted. In the depressurized state, the spring presses the bolt 109 downwards. The seal, which is preferably in the form of an O-ring 114, lies directly against the wall 152 of the cavity, preferably the bore 150 of the valve, in particular the venting valve, and thus blocks the escape of gas, in particular compressed air, from the pressure vessel into which the valve is inserted as shown in Fig. 2. Fig. 1a shows that in the depressurized state, the pointer 102 points to the first pressure level, so that the user is informed that no pressure has or has not yet built up in the vessel.

[0050] As soon as the air pressure in the container 41 increases, as shown in Fig. 2, an axial force acting opposite to the spring force is applied to the pressure surface 107, as shown in Fig. 3. When the force of the air pressure exceeds the holding force of the spring 108, the bolt 109 moves upwards. The helix 113 moves the bolt 109 and, with it, the rotating cap 106, linearly upwards in the direction of the pouring funnel 43. This can be seen in Fig. 3b. Components that are the same as in Fig. 3a have the same reference numerals. The bolt 109 is raised slightly upwards, as can be seen from Fig. 3a, but the O-ring 114 still lies tightly against the wall 152 of the bore 150, so that no air escapes from the pressure container into which the pressure valve is inserted. The position of the rotary cap 106 with the pointer 102, which informs the operator about the pressure status in the pressure vessel, can be seen in Fig. 1b.

[0051] The higher the bolt 109 rises, the closer it comes to the venting point 112. If the bolt 109 exceeds the venting point 112, as shown in Fig. 3c, the O-ring 114 can no longer hold the pressure. When the bolt exceeds the venting point, the O-ring 114 no longer rests against the wall 152 of the bore 150, but instead opens up a channel 154 through which the gas or air can escape from the pressure vessel shown in Fig. 2. The valve 90 releases the pressure by allowing the air or gas to flow past the O-ring 114 through the channel 154 until the air pressure or gas pressure drops and the O-ring 114 seals again with the help of the valve body 111. The air within the pressure vessel 41 can thus escape in a controlled manner. Due to the rotary linear movement of the rotary cap 106, the pointer 102 also rotates to the position shown in Fig. 1c and thus transmits the current pressure level to the operator.

[0052] The invention provides a valve, according to a first aspect, in particular a pressure relief valve, which acts reliably as a vent valve and is characterized by a small installation space.

[0053] Fig. 4 shows individual parts of the pump 42, in particular a hand pump, inserted into the container 41 shown in Fig. 2, consisting of a pump housing 210 and a pump plunger 220 with a handle 230. By moving the handle 230, the pump plunger 220 is moved in the pump housing 210 and pressure is built up in the container into which the pump 42 is inserted. Also shown in Fig. 4 are the half-shells 240.1, 240.2 with which the handle 230 is reversibly fastened to the pump housing 210, in which a plunger of the pump 220 slides. By means of the handle 230, not only the pump plunger 220 can be moved, but also the entire container into which the pump shown in individual parts in Fig. 4 is inserted can be transported.

[0054] The half-shells 240.1, 240.2 used and inserted to fasten the pump handle 230 to the pump housing 210 are shown in detail from different perspectives in Figs. 5a - 5c. Fig. 5a is a 3D view, Fig. 5b a front view and Fig. 5c a side view. In all three images Fig. 5a - 5c, which show the half-shells 240.1, 240.2, the ramp-shaped spring-loaded tab 300 with bolts 310 is shown. The bolts 310 serve to engage under hooks (not shown) of the piston housing or

[0055] Pump housing 210 and lock the handle 230. The spring travel F of the resilient tab 300 with bolt 310 is shown in the side view according to Fig. 5c.

[0056] Fig. 6a - 6b show the pump 42 with handle 230 in which the handle 230 is fastened according to the invention with bolts 310 which engage in hooks 250.1, 250.2 of the pump housing 210.

[0057] The two hooks 250.1 , 250.2 of the pump housing can be clearly seen in Fig. 4.

[0058] According to a second aspect of the invention, a hand pump is provided with a pump housing 210 which can be reversibly equipped with a handle and inserted into a container.

[0059] The application covers the aspects set out in the following sentences, which are part of the description but not claims.

[0060] Sentences

[0061] 1. Valve (90), preferably a vent valve, in particular for a pressure spray device with a union nut or a rotating cap (106) and a bolt (109) which is connected to the rotating cap (106) and slides within an opening in the union nut and a spring which surrounds the bolt (109), the bolt (109) having a helix or screw line, characterized in that a force generated by the air pressure on the pressure surface of the bolt (109) moves the latter upwards and in addition to the axial movement, a rotary movement of the bolt and thus also of the rotating cap (106) takes place which is generated by the helix or screw line of the bolt.

[0062] 2. Valve, in particular vent valve, according to sentence 1, characterized in that a scale and / or a position indicator and / or a pointer for displaying the current operating pressure is arranged on the union nut or the rotary cap (106).

[0063] 3. Valve, preferably vent valve, according to one of the sentences 1 to 2, characterized in that a spring force is exerted by the spring such that the bolt (109) is pressed downwards.

[0064] 4. Valve, preferably vent valve, according to one of the sentences 1 to 3, characterized in that when the vent valve is used in a pressure vessel, when the pressure in the pressure vessel increases, an axial force acting opposite to the spring force is applied and the bolt (109) is pressed upwards and is preferably set into a rotational movement by the helix.

[0065] 5. Valve, preferably vent valve, according to one of the sentences 1 to 4, characterized in that the bolt (109) is guided into a cavity, preferably a bore of the vent valve, in particular of the valve body.

[0066] 6. Valve, preferably vent valve, according to one of the sentences 1 to 5, characterized in that the bolt (109) comprises a seal (114) which preferably in a first position lies tightly against the wall of the cavity, preferably the bore.

[0067] 7. Valve, preferably vent valve, according to one of the sentences 1 to 6, characterized in that the seal (114) of the bolt (109) in a second position does not lie tightly against the wall of the cavity, preferably the bore, and opens up an air channel.

[0068] 8. Valve, preferably vent valve, according to one of sentences 1 to 7, characterized in that the valve, in particular the vent valve, comprises a pointer, wherein the pointer interacts with a scale on the rotary cap, such that with the aid of the scale information about the container pressure of the container, in particular of the pressure container, in which the valve, preferably the vent valve, is inserted is provided.

[0069] 9. Container, in particular pressure container, preferably pressure spray container of a pressure spray device, characterized in that the container, in particular the pressure container, preferably the pressure spray container of a pressure spray device, comprises at least one valve, in particular a vent valve according to one of sentences 1 to 8.

[0070] 10. Use of a valve, in particular a valve according to one of sentences 1 to 8, in particular a vent valve, preferably in a pressure vessel, preferably in a pressure spray container of a pressure spray device as

[0071] - vent valve and / or

[0072] - Safety valve and / or

[0073] - Pressure gauge

Claims

Patent claims 1. Valve (90), preferably a vent valve, for a pressure spray device with a union nut and a rotary cap (106) and a bolt (109) which is connected to the rotary cap (106) and slides within an opening in the union nut and a spring which surrounds the bolt (109), wherein the bolt (109) has a Helix or screw line, characterized in that a force generated by air pressure on a pressure surface of the bolt (109) moves the bolt upwards and in addition to an axial movement, a rotational movement of the bolt and thus also of the rotary cap (106) generated by the helix or screw line of the bolt takes place.

2. Valve, in particular vent valve, according to claim 1, characterized in that a scale or a position indicator or a pointer for displaying the current operating pressure is arranged on the union nut or the rotary cap (106).

3. Valve, preferably vent valve, according to one of claims 1 to 2, characterized in that a spring force is exerted by the spring such that the bolt (109) is pressed downwards.

4. Valve, preferably vent valve, according to one of claims 1 to 3, characterized in that when the valve is used in a pressure vessel, with increasing pressure in the pressure vessel, an axial force acting opposite to the spring force is applied and the bolt (109) is pressed upwards and is preferably set in a rotational movement by the helix.

5. Valve, preferably vent valve, according to one of claims 1 to 4, characterized in that the bolt (109) is guided into a cavity, preferably a bore of the valve, in particular the vent valve.

6. Valve, preferably vent valve, according to claim 5, characterized in that the bolt (109) comprises a seal (114) which, preferably in a first position, lies tightly against the wall of the cavity, preferably a bore.

7. Valve, preferably vent valve, according to claim 6, characterized in that the seal (114) of the bolt (109) in a second position does not lie tightly against the wall of the cavity, preferably the bore, and opens an air channel.

8. Valve, preferably vent valve, according to one of claims 2 to 7, characterized in that the pointer of the valve interacts with a scale on the rotary cap, such that with the aid of the scale information about the container pressure of the container, in particular of the pressure container, in which the valve, preferably the vent valve, is inserted, is provided.

9. Valve, preferably vent valve, according to one of claims 1 to 8, characterized in that individual components of the valve are plugged together without screw connections.

10. Container, in particular pressure container, preferably pressure spray container of a pressure spray device, characterized in that the container, in particular the pressure container, preferably the pressure spray container of a pressure spray device, comprises at least one valve, in particular a vent valve according to one of claims 1 to 9.

11. Container according to claim 10, characterized in that the valve, in particular the vent valve, is connected to the container by a screw connection.

12. Container according to one of claims 10 to 11, characterized in that the container comprises a pump (42), in particular a hand pump, preferably an axial piston pump.

13. Container according to claim 12, characterized in that the hand pump comprises at least one handle (230) and a housing or pump housing (210).

14. Container according to claim 13, characterized in that two bolts (310) are provided on the handle, which are locked under a hook (250.1, 250.2) on the housing screwed into the container, in particular the pump housing (210) of the hand pump.

15. Use of a valve, preferably a valve according to one of claims 1 to 9, in particular a venting valve, preferably in a container, in particular a pressure container, preferably a pressure spray container of a pressure spray device as - vent valve and / or - Safety valve and / or - Pressure gauge

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