EP3280540B1 - Devices and methods for impulse ejection of a medium - Google Patents

Description

The present invention relates to devices and methods for pulse ejecting media.

Devices for pulse ejection are known from, for example EP 0 402 425 A1 and EP 0 689 857 A2 .

DE 195 09 322 A1 discloses a high pressure fire extinguisher. The high-pressure fire extinguisher has an extinguishing agent chamber, an extinguishing agent connection through which the extinguishing agent chamber can be filled, a compressed gas chamber and a compressed gas connection through which the compressed gas chamber can be filled, a valve arranged between the extinguishing agent chamber and the compressed gas chamber, which when the compressed gas chamber is filled by the pressure prevailing therein of typically approx. 20 bar is held in the closed position. By means of a release device, part of the compressed gas can be diverted in such a way that it generates a force which opens the valve so that the gas remaining in the compressed gas chamber can penetrate through the valve into the extinguishing agent chamber. The extinguishing agent is blown out suddenly and is deposited in an extremely fine distribution on the source of the fire.

The aim of the present invention is to further develop the known solutions.

One aspect of the invention relates to a device for the impulse ejection of medium, with a medium space for receiving medium, which is delimited by an ejection tube and an adjoining sleeve opposite to the ejection tube, and a propellant chamber for receiving a propellant, which the At least partially surrounds the media space in the area of the sleeve, the sleeve being designed for a movement between a printing position and an ejection position, the sleeve sealing the media space in the printing position at one end with respect to the propellant chamber and in the ejection position the sleeve from Termination is spaced, so that there is a fluid connection for the passage of propellant from the propellant space in the media space.

Another aspect of the invention relates to a method for impulse ejection of medium, with the steps of filling a media space of a device for impulse ejection with medium, the media space being delimited by an ejection tube and an adjoining sleeve adjacent to the ejection tube and the filling of a propellant space of the device with pressurized propellant, the propellant space at least partially surrounding the media space in the region of the sleeve, the sleeve being held in a printing position after the filling steps, in which the sleeve closes the media space with respect to the propellant space, the sleeve being released in a subsequent release step for a movement from the printing position to an ejection position, in which the sleeve is moved by the pressurized propellant, in such a way that the sleeve is spaced from the termination as a result of the movement and a fluid connection to it The passage of propellant from the propellant space into the media space is formed, the propellant ejecting the medium in a pulsed manner through the ejection end in a pulse step.

These aspects of the invention are based on a finding that the pressurized propellant itself can be used as a means for opening a "closure" that separates the propellant from the medium, such an opening not being restricted to the propellant and move the "shutter" in the same direction. In the present case, the propellant drives the sleeve in the direction of the ejection end, so that the fluid connection is established or released, but the impulse ejection itself is caused by the propellant that initially relaxes in the opposite direction. The device according to the invention allows the propellant space to be provided around the media space, so that a more compact design is possible compared to a known device for impulse ejection, in which the media space and propellant space are arranged one behind the other.

It has also been found that the invention, compared to known devices for pulse ejection, has less kickback for the same pulse power, which is of particular interest in the case of a hand-held device. If one accepts the recoil, which continues to be the same, a larger amount of medium can be impulse ejected with the device according to the invention and the method according to the invention.

In one embodiment of the invention, the sleeve has a collar area which encloses the ejection tube in one area. The overlapping of the sleeve and the ejection tube in the collar area results in a coupling and a connection between the sleeve and the ejection tube, which can be movably sealed, for example, by a sliding seal or the like.

In one configuration of the embodiment, the collar area is arranged between the propellant space and a pressure chamber, the pressure chamber being designed to receive a pressurized fluid, so that the sleeve is pressed onto the termination by a pressure in the pressure chamber. The pressurized fluid (gas and / or liquid) in the pressure chamber presses the sleeve in the direction away from the discharge end, namely in the direction of the termination. The pressure of the fluid thus ensures the sealing effect of the sleeve and closure.

In an advantageous further development of the embodiment, the collar area has a first end face opposite the pressure chamber and a second end face opposite the propellant space, which is smaller than the first end face. Even with the same pressures in the pressure chamber and propellant space, the difference in the end faces results in a force that presses the sleeve onto the termination. In this respect, the pressure in the pressure chamber and the propellant space can be built up together. In particular, it is possible to fill both the propellant space and the pressure chamber with the propellant which is under pressure. With a corresponding difference in the end face, however, the pressure in the pressure chamber can even be lower than that in the propellant space without the resulting force not occurring. Even if the end face opposite the propellant chamber is larger than that opposite the pressure chamber, the desired resultant force (which presses the sleeve onto the termination) can be achieved if the fluid in the pressure chamber has a sufficiently higher pressure than the propellant in the propellant chamber.

In another development, the collar area is provided with at least one non-return valve, which is designed for a passage of propellant from the pressure chamber to the propellant space. The non-return valve allows propellant to first be introduced into the pressure chamber and from there into the propellant space without the propellant space immediately suffering a corresponding pressure drop in the event of a pressure release in the pressure chamber.

In one embodiment of the invention, the sleeve has a shoulder on its inner side in the region of the collar area, where an inner cross section of the sleeve essentially corresponds to an inner cross section of the ejection tube. It has been found that the inner cross-sections corresponding to one another (that is to say inner walls which are in alignment with one another) are advantageous for the pulse output, which could possibly be due to the avoidance of turbulence.

In one embodiment of the invention, the shoulder is formed by a projection and the inner cross section of the sleeve widens at least in part of the sleeve in the direction of the termination. A preferably continuous transition to a further internal cross-section has not been shown to be disadvantageous for the pulse output, with the larger internal cross-section being able to achieve a larger volume of the media space without having to make the device itself longer.

In a further embodiment, the sleeve can be understood as having guide elements so that, for example, relative rotation of the sleeve within the casing tube or relative to the ejection tube can be prevented.

It is possible to pressurize the pressure chamber and the propellant space separately, regardless of whether there is a (limited or one-sided) fluid connection between the pressure chamber and the propellant space.

In the context of the invention, the differential pressure force is preferably used to press the sleeve against the termination. Instead of or in addition to a force that results from different pressures and / or end faces, another force action or preload can be provided, for example by a corresponding spring (preferably in the pressure chamber) or by magnets that are either attractive (e.g. in the sleeve and Termination) or repulsive (e.g. in the pressure space, media space or jacket pipe on the one hand and in or on the sleeve on the other hand) are arranged.

The release preferably takes place through a rapid pressure drop in the pressure chamber, so that the pressure in the propellant space removes the sleeve from the closure. The invention is not limited to this, and other types of release may be used, including a mechanical lock that is released for release.

It is not absolutely necessary that the gap between the sleeve and the jacket tube is (completely) sealed as long as the passage of propellant is limited or made more difficult so that no significant proportion of propellant "fizzles out" through this gap in the pulse output. On the contrary, it is entirely possible to use the annular gap between the sleeve and the jacket tube as a desired fluidic connection between the propellant space and the pressure chamber, so that both can be filled with propellant under pressure. It can be provided here (but also in other configurations) that the propellant is supplied via the propellant space and from there propellant reaches the pressure chamber. In such a case, it is sufficient for a pressure-release-controlled release of the sleeve that the pressure chamber is provided with a drain, which does not necessarily have to be designed for the supply of propellant or other fluid.

One possibility of further designing the seal between the sleeve and jacket tube, if one is provided, is to design the seal with a non-return valve function, so that propellant that is supplied to the pressure chamber through this seal or past it into the Propellant chamber can get to build up pressure there, but cannot penetrate in the opposite direction from the propellant chamber into the pressure chamber (pressureless when triggered).

A seal provided between the sleeve and the ejection tube is not restricted to resting against the outer surface of the ejection tube and the inner surface of the sleeve, for example in the form of an O-ring. Another possibility is, for example, to provide a bellows or the like between the sleeve and the ejection tube to connect them.

If the sleeve is released through a pressure release in the pressure chamber, this pressure release can be designed so that the pressure chamber is not completely depressurized (e.g. by maintaining an opening to the environment), but that a defined amount of fluid remains in the pressure chamber, which - in particular if the fluid is a gas - exerts a braking effect on the sleeve as a buffer in order to avoid or at least reduce the impact of the sleeve on the ejector tube, for example.

The device according to the invention is preferably designed for hand-held use (preferably completely mobile), although the invention can also be implemented in a vehicle-supported or permanently mounted device.

The discharge tube, the sleeve and the jacket tube are preferably formed with a (circular) round shape in cross section, although other shapes are also possible, including asymmetrical designs.

Another aspect of the invention, in combination with one of the above embodiments, relates to a device for impulse ejection of medium, with a device body with a medium space for receiving medium, which is at least partially limited by an ejection tube, and a propellant space for receiving a propellant for impulsively expelling the medium through an ejection end of the ejection tube, a release handle attached to the device body for holding the device with a first hand of a user and for triggering the impulse ejection and a handle attached to the device body for holding the device with a second hand of the User, wherein the handle and / or the release handle are designed for pivoting about an axis parallel to an ejection direction of the impulse ejection.

In the case of a hand-held device for pulse ejection, there is generally a need to hold the device securely with two hands due to the recoil that occurs during pulse ejection from a certain size of the device. It has been found that regardless of the question of whether the user is right-handed or left-handed, different users have different preferences as to how the release handle and handle are aligned relative to one another. With a corresponding setting option for this alignment, it was found that the posture and handling of the device could be improved. In general, the device for the impulse ejection is held in the hip, so that the handling cannot be compared with that of a rifle, which is usually placed in the shoulder for aiming.

In one embodiment of this aspect of the invention, the device comprises a shut-off element for a supply line for medium to the media space, the handle being designed for displacement along the discharge tube between a passage position and a closed position, the handle being coupled to the shut-off element in such a way that through a shift of the handle into the passage position opens the shut-off element for the passage of medium and the shut-off element can be closed by shifting the handle into the closed position. at In this embodiment, the medium can be fed to the media room without having to take your hands off the handle and the release handle. If the user has to take one of his hands off a handle to control the shut-off device (for example from the handle), it can happen that the user forgets to hold the handle again and the impulse output is already triggered. Because of the recoil, this can lead to an uncontrolled reaction ("bucking") of the device, which is associated in particular with a risk of injury to the user.

In a further development, the pivotable handle is equipped with a fixing device that allows either fixing or release for pivoting. With the fixation, the user can set a pivot position that has once been set as desired.

The pivotable handle can be provided with a guide that restricts pivoting to certain areas. With a T-slot-shaped guide or a V-shaped opening, pivoting in the area drawn towards the release handle is not permitted, or only permitted to a limited extent.

The device according to the invention preferably has one or more stops for the pivotable handle, which limit the pivoting, although a completely free pivoting, at least for the handle, is not excluded.

Fig. 1

eine schematische Illustration eines ersten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung zum Impuls-Ausstoß von Medium in einem Zustand vor einem Ausstoß,

Fig. 2

eine schematische Illustration eines ersten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung zum Impuls-Ausstoß von Medium in einem Zustand beim Ausstoß,

Fig. 3

eine schematische Illustration eines zweiten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung zum Impuls-Ausstoß von Medium in einem Zustand vor einem Ausstoß vergleichbar zur Illustration von Fig. 1,

Fig. 4

eine schematische Illustration eines dritten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung zum Impuls-Ausstoß von Medium in einem Zustand vor einem Ausstoß vergleichbar zur Illustration von Fig. 1 oder Fig. 3,

Fig. 5

eine schematische perspektivische Ansicht eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung zum Impuls-Ausstoß von Medium und

Fig. 6

ein schematisches Ablaufdiagramm eines erfindungsgemäßen Verfahrens zum Impuls-Ausstoß von Medium.

In the following, the present invention is further illustrated and explained on the basis of the exemplary embodiments shown in the figures. Here shows

Fig. 1

a schematic illustration of a first embodiment of the device according to the invention for the impulse ejection of medium in a state before an ejection,

Fig. 2

a schematic illustration of a first embodiment of the device according to the invention for impulse ejection of medium in a state during ejection,

Fig. 3

a schematic illustration of a second embodiment of the device according to the invention for the impulse ejection of medium in a state before an ejection comparable to the illustration of FIG Fig. 1 ,

Fig. 4

a schematic illustration of a third embodiment of the device according to the invention for pulse ejection of medium in one State before an ejection comparable to the illustration of Fig. 1 or Fig. 3 ,

Fig. 5

a schematic perspective view of an embodiment of the device according to the invention for pulse ejection of medium and

Fig. 6

a schematic flow diagram of a method according to the invention for pulse ejection of medium.

Fig. 1 shows a schematic illustration of a first exemplary embodiment of the device 10 according to the invention for the impulse ejection of medium in a state before an ejection.

The device 10 for pulse ejection has a media space 1 which is used to receive media. The medium can, for example, be a liquid (e.g. water, possibly mixed with additives or the like). Another possibility is to provide suitable particles with a sufficiently small grain size as the medium. Since the invention does not necessarily differ from known solutions for pulse ejection with regard to the medium itself, a further discussion of the medium can be dispensed with here, since the person skilled in the art is sufficiently familiar with the properties and requirements of media to be ejected by pulse.

The media space 1 is delimited by an ejection tube 2, the ejection tube 2 in the ejection direction (in the illustration of FIG Fig. 1 to the left) even at its discharge end (in Fig. 1 not shown, see Fig. 5 ) can be open or closed by a known membrane or the like to prevent the medium from escaping unintentionally.

On the side facing away from the discharge end (in Fig. 1 i.e. to the right) a sleeve 13, which also encloses the media space 1. Media space 1 and sleeve 3 extend up to a termination 6 at which the sleeve 3 in the state of Fig. 1 fits tightly.

The media space thus extends from the end 6 through the sleeve 3 and the discharge tube 2 to the discharge end of the discharge tube 2 or to another closure area of the discharge tube 2 (in Fig. 1 not shown). It should be noted in this regard that the media space 1 does not necessarily have to be completely filled with medium before an ejection. The medium can be ejected as long as the medium is present in an amount and distribution that "deflagrates" the propellant (see below) prevented. However, this also applies to conventional devices for the impulse ejection of medium.

The sleeve 13, together with a jacket tube 14 receiving the sleeve 13 and the closure 6, encloses a propellant space 5. In the state shown in FIG Fig. 1 is shown, there is no fluid connection between the propellant space 5 and the media space 1, since the sleeve 13 rests on the closure 6 in a sealing manner.

In their end or collar area 18 in the direction of the discharge end (i.e. to the left in Fig. 1 ) the sleeve 13 expands so that it essentially fills the area between an outer surface of the discharge tube 2 and an inner surface of the casing tube 14 in one section. With this widening, the sleeve has an end face 42 opposite the propellant space 5 which corresponds to the cross section of the propellant space 5.

In this area, the sleeve 13 is provided with a seal 17 between the sleeve 13 and the jacket tube 14 for additional sealing against the passage of propellant.

On the side of the sleeve facing away from the propellant chamber 5 (in the direction of the ejection end), the ejection tube 2, the jacket tube 14 and the sleeve 13 enclose a pressure chamber 9 . A seal 19 between the sleeve 13 and the ejection tube 2 seals against an escape of propellant (see below) from the pressure chamber 9 into the media space 1.

The sleeve 13 is movably arranged with respect to the ejection tube 2 along a central or longitudinal axis of the ejection tube 2, so that the size of the pressure chamber 9 is variable. The movement of the sleeve 13 with respect to the discharge tube 2 is limited by the closure 6 on the one hand and the discharge tube 2 itself on the other hand.

At a distance from the end of the ejection tube 2, the sleeve 13 has a circumferential shoulder 47 on the inside, which is designed such that the clear cross section (or inner cross section) of the shoulder 47 corresponds to the clear cross section of the ejection tube 2. It is not necessary here for a movement of the sleeve 13 (see Fig. 2 ) the paragraph 47 abuts or strikes the end of the discharge tube 2, although this is not excluded. In the in Fig. 1 illustrated embodiment would be the inner wall of the sleeve 13 and the inner wall of the discharge tube 2 in a such a stop in alignment with each other. The shoulder 47 is designed as a projection so that the clear cross section of the sleeve widens in the direction away from the ejection end. In the present exemplary embodiment, this widening takes place in such a way that the internal cross-section in front of and behind the projection is identical, even if this is not necessary.

In the area of the pressure chamber 9, the jacket tube 14 has a feed line 3 to the pressure chamber 9, through which the pressure chamber 9 can be provided with pressurized propellant 9.

If pressurized propellant is introduced into the pressure chamber 9, the resulting pressure in the pressure chamber 9, which also acts on the end face 41 of the sleeve 13, ensures that the sleeve 13 is pressed against the closure 6.

In the present exemplary embodiment, the sleeve 13 has a passage 8 through the collar area 18. The passage 8 fluidly connects the pressure chamber 9 with the propellant chamber 5 and has a non-return valve 45, which only allows passage from the pressure chamber 9 to the propellant chamber 5 and blocks it in the opposite direction. In Fig. 1 only one such feedthrough 8 is shown, but the device according to the invention can have several such feedthroughs 8 with non-return valves 45 distributed around the circumference of the sleeve 13.

When the pressure chamber 9 is filled with propellant and pressurized, propellant then passes through the passage 8, so that essentially the pressure in the pressure chamber 9 is established in the propellant space 5. Even when the pressure of the propellant is present in the propellant space 5, a resultant force remains on the sleeve 13, since the end face 41 is larger than the end face 42. Since only the force acting in the longitudinal direction is relevant for this, the inclination of the sleeve 13 in the collar area 18 is irrelevant.

In preparation for a pulse ejection, the media space 1 is filled with medium and a desired pressure of the propellant (fluid, preferably gas, for example air) is built up in the pressure chamber 9 and propellant chamber 5.

If the pressure of the propellant in the pressure chamber 9 is reduced (preferably suddenly), the pressure of the propellant still present in the propellant space 5 drives the sleeve 13 in the direction of the ejection tube 2 (in Fig. 1 to the left) so that the sleeve 13 moves away from the termination 6 and thus a fluid connection (see Fig. 2 ) between propellant space 5 and media space 1 is created.

The state of the opposite to the representation of Fig. 1 moving sleeve 13 is in Fig. 2 which shows a schematic illustration of a first exemplary embodiment of the device 10 according to the invention for impulse ejection of medium in a state during ejection.

The pressurized propellant flows through the fluid connection 7 between the closure 6 and the sleeve 13 moved therefrom, as indicated by the arrows 15. The expanding propellant expels the medium present in the media space 1, so that the medium is impulse ejected from the media space 1 through the sleeve 13 and the ejection tube 2, as indicated by the arrow 16.

Fig. 3 FIG. 11 shows a schematic illustration of a second exemplary embodiment of the device 20 according to the invention for the impulse ejection of medium in a state before an ejection comparable to the illustration of FIG Fig. 1 .

The basic structure of the device 20, which is shown in Fig. 3 is shown corresponds to that of the device 10 shown in FIGS Figs. 1 and 2 is shown. Corresponding elements are provided with identical reference symbols. Unless otherwise explained below, the above applies Figs. 1 and 2 Executed accordingly for the second embodiment.

The second embodiment differs from the first embodiment of the device according to the invention in the different configuration of the sleeve 23. The sleeve 23 has in its collar area 28, which connects to the area between the discharge tube 2 and a jacket tube 24, a shoulder 48 in which the inner cross-section of the sleeve 23 is reduced in one step from an area which surrounds the ejection tube 2 and essentially rests against the ejection tube 2 on the outside, to an inner cross-section which corresponds to that of the ejection tube 2. In contrast to the first exemplary embodiment, the inner cross section of the sleeve 23 does not widen towards the end 6 but remains constant.

The sleeve 23 has an end face 43 opposite the pressure chamber 9 and a further end face 44 opposite the propellant chamber 5. In the second embodiment is however - contrary to the case of the first embodiment Figs. 1 and 2 the end face 44 larger than the end face 43.

As in the first exemplary embodiment, the jacket tube 24 has a feed line 3 to the pressure chamber 9, through which the interior of the pressure chamber 9 can be pressurized. In addition to this, the jacket tube 24 (unlike the above jacket tube 14) comprises a further supply line 11 to the propellant chamber 5, through which the propellant chamber 5 can be supplied with pressurized propellant independently of the pressure chamber.

Accordingly, the sleeve 23 does not have a passage for a fluid connection between the pressure chamber 9 and the propellant chamber 5.

Since the pressures in the pressure chamber 9 and in the propellant chamber 5 can thus be set independently of one another, by setting a pressure in the pressure chamber 9 that is correspondingly higher than the pressure in the propellant chamber 5, a resultant force can then also be achieved, which the sleeve 23 on the Completion presses when the cross section 44 is larger than the cross section 43.

As in the first embodiment, a pressure drop in the pressure chamber 9 reverses this resulting force in view of the pressure remaining in the propellant chamber 5, so that the sleeve 23 is moved in the direction of the discharge end and thus allows the fluid connection between the propellant chamber 5 and the media chamber 1.

Fig. 4 FIG. 11 shows a schematic illustration of a third exemplary embodiment of the device according to the invention for the impulse ejection of medium in a state before an ejection comparable to the illustration of FIG Fig. 1 or Fig. 3 .

The basic structure of the device 30, which is shown in Fig. 4 is shown corresponds to that of the device 10 shown in FIGS Figs. 1 and 2 is shown. Corresponding elements are provided with identical reference symbols. Unless otherwise explained below, the above applies Figs. 1 and 2 Executed accordingly for the third embodiment.

The basic shape of the sleeve 33 of the third embodiment largely corresponds to the sleeve 13 of the first embodiment. Unlike this, the Sleeve 33 has a seal 19 for sealing between sleeve 33 and discharge tube 2 only on its inside, but not on the outside, which is directed towards a casing tube 34. Merely because the sleeve 33 rests against the inner wall of the jacket tube 34, there is a certain fluid resistance to the passage of propellant between the pressure chamber 9 and propellant space 5. Similar to the second embodiment, the sleeve 33 itself does not have a passage from the pressure chamber 9 to the propellant space 5 on.

The jacket tube 34, like the jacket tubes 14 and 24 of the first and second exemplary embodiment, has a feed line 3 to the pressure chamber 9. Unlike the jacket tubes 14 and 24 of the other exemplary embodiments, the jacket tube 34 itself has two passages 12 which - each provided with a non-return valve 46 - allow a passage of pressurized propellant from the pressure chamber 9 to the propellant chamber 5 and block it in the opposite direction.

In Fig. 4 two feedthroughs 12 with a respective check valve 46 are shown, it being possible for one feedthrough 12 or even several feedthroughs 12 to be provided depending on the design. If necessary, one or more passages through the sleeve can also be provided, as described above with reference to the first exemplary embodiment.

The collar area 38 of the sleeve 33, due to the lack of an actual seal between the sleeve 33 and the jacket tube 34, allows propellant to pass through in addition to the ducts 12. It is also possible to modify the present third embodiment by providing a seal between the sleeve and the jacket tube as in the first and second embodiments.

For the function of the invention, however, it is not detrimental that pressurized propellant can also reach the pressure chamber 9 from the propellant chamber 5 if the fluid resistance for the passage between the sleeve 33 and jacket tube 34 is so great that in the relevant period of the pulse output no excessive pressure drop occurs. With an appropriate design, the passage through the annular gap between the sleeve and the jacket tube can also be used as the sole fluid connection between the pressure chamber and the propellant space without the need for additional passages (with or without a non-return valve).

In addition to the configuration of the first exemplary embodiment, the third exemplary embodiment has one or more springs 49 which, even without pressure from the propellant being applied, pretension the sleeve 33 so that it lies against the termination 6. With the help of such a pressure-independent preload (which can also be generated in other ways), an indefinite position of the sleeve is avoided when there is (still) no pressure of the propellant. The force of the preload is set in such a way that it is negligible compared to the pressure force of the propellant acting on the end face 42 when the impulse ejection is triggered.

The device according to the invention, as discussed above with reference to exemplary embodiments, can - if a shut-off element, for example a valve or the like, is provided for filling the media space with medium - provide an automatic closing of this shut-off element, for example by a desired degree of filling independently of an operation by the user and / or to prevent the media room from being unintentionally filled in the interests of safety. It is possible to link the triggering of the impulse ejection to the previous lock or, in turn, to link the lock itself to the triggering (e.g. in the sense that after a pulse ejection, a supply of medium is prevented until it is released by the operator ).

Fig. 5 shows a schematic perspective view of an embodiment of the device 50 according to the invention for the impulse ejection of medium.

The device 50 for pulse ejection comprises a device body 51. This device body 51 has a media space (not shown, see for example Figs. 1 to 4 ), which is used to hold the medium. As discussed in the above embodiments, the media space is at least partially defined by an ejection tube (not shown, see for example Figs. 1 to 4 ) limited. The device body also has a propellant space (not shown, see for example Figs. 1 to 4 ), in which propellant can be kept for the impulse-like expulsion of the medium.

The device 50 comprises a trigger handle 52 attached to the device body 51, which, comparable to conventional hand-held devices for pulse ejection, serves to hold the device 50 with a first hand of the user and to trigger the pulse ejection.

As is also known from conventional hand-held devices, the device 50 has a handle 53 for holding the device 50 with a second hand of the user.

The device 50 of this exemplary embodiment is characterized in that the handle 53 is designed for pivoting about a longitudinal axis of the device 50 (or the ejection tube), as indicated by the double arrow 58. This pivoting allows the handle 53 to be moved, for example, by 90 ° from a plane defined by the release handle and the longitudinal axis of the device (that is to say approximately the plane of the drawing from FIG Fig. 5 ) to pivot in order to adjust the device 50 to the wishes of the respective user, who can be left-handed or right-handed.

As an alternative or in addition, the release handle 52 can also be designed for pivoting.

In this exemplary embodiment, the handle 53 has a function for operating a shut-off element 54 of the device 50 that goes beyond holding. The shut-off element opens or closes a supply line 55 for medium to the media space 1 of the device. The handle 53 is designed for a displacement along the discharge tube (between the discharge end 4 and the release handle 52) between a passage position and a closed position and is coupled to the shut-off element 54 so that the shut-off element 54 for a passage of medium is opened and the shut-off element 54 can be closed by moving the handle 53 into the closed position. This shift is indicated by the double arrows 59.

Here, the device 50 has a casing 56 which is movably attached to the device body 51. This casing 56 has a groove 57 into which a transmission mechanism coupled to the shut-off element 54 engages, so that the transmission of the longitudinal displacement is independent of the pivoting state of the handle 53.

Even when the shut-off element 54 is operated by the handle 53 as described above, the shut-off element 54 can also be configured (not shown here) that further passage of medium is prevented, for example when a predefined degree of filling is reached. Such a lock temporarily overriding the operation by the handle 53 can also be used in connection with a Triggering the impulse ejection be connected, wherein - for example, until a renewed back and forth movement of the handle 53 - a media passage is prevented in order to avoid a possible. to prevent unwanted immediate filling with medium.

An alternative to this can be to provide a safety device so that triggering the impulse ejection is only possible in the case of a corresponding position of the handle 53 (closing the shut-off element).

Fig. 6 shows a schematic flow diagram of a method according to the invention for the impulse ejection of medium.

In a filling step 101, a media space of a device for pulse ejection is filled with medium. For the details of the device for pulse ejection, refer to those in the Figs. 1 to 4 referenced embodiments shown.

In a parallel step of filling 102, a propellant space of the device is filled with pressurized propellant.

A sleeve of the device, which partially encloses the media space, is held in a printing position after the filling steps 101, 102, in which the sleeve seals the media space from the propellant space.

Depending on the details of the device for pulse ejection, the propellant space or the media space can be filled first, followed by further filling in each case. It is also possible for steps 101 and 102 to be carried out at least partially in parallel and at the same time.

In a subsequent release step 103, the sleeve is released for a movement from the printing position to an ejection position. During this movement, the sleeve is moved by the pressurized propellant, so that, as a result of the movement, the sleeve is spaced from a closure on which it abutted for sealing between the media space and the propellant chamber, so that a fluid connection is established for the propellant to pass through Forms propellant space in the media space.

The pressurized propellant passes through this fluid connection in a pulse step 104 and propels the medium in front of it, so that the medium is ejected from an ejection end of the device in a pulsed manner.

List of reference symbols

1

Media room

2

Discharge tube

3

Supply line to the pressure chamber

4th

Expelling

5

Propellant room

6th

diploma

7th

Fluid connection

8th

Passage through sleeve

9

Pressure chamber

10

Device for pulse ejection

11th

Feed line to propellant room

12th

Passage through jacket pipe

13th

Sleeve

14th

Jacket pipe

15th

Arrow to illustrate the propellant flow

16

Arrow to illustrate the impulse ejection of the medium

17th

Seal between sleeve and jacket pipe

18th

Collar area

19th

Seal between the sleeve and the discharge tube

20th

Device for pulse ejection

23

Sleeve

24

Jacket pipe

28

Collar area

30th

Device for pulse ejection

33

Sleeve

34

Jacket pipe

38

Collar area

41

first face

42

second face

43

third face

44

fourth face

45

Check valve

46

Check valve

47

paragraph

48

paragraph

49

feather

50

Device for pulse ejection

51

Device body

52

Release handle

53

Grab handle

54

Shut-off device

55

Supply line for medium

56

Sheathing

57

Groove

58

Arrow to illustrate the pivoting movement

59

Arrow to illustrate the longitudinal shift

101

Filling the media room

102

Filling the propellant space

103

Release of the sleeve

104

Impulse output

Claims (11)

1. A device (10, 20, 30) for impulse ejection of a medium, comprising

   a medium chamber (1) for holding a medium, said chamber being defined by an ejection tube (2) and a sleeve (13, 23, 33), the sleeve (13, 23, 33) adjoining the ejection tube (2) opposite from the ejection end (4) thereof, and

   a propellant chamber (5) for holding a propellant, said propellant chamber surrounding at least partially the medium chamber (1) in the region of the sleeve,

   wherein the sleeve is designed for movement between a pressure position and an ejection position, wherein the sleeve seals, in the pressure position, the medium chamber (1) from the propellant chamber (5) at an end plate (6) and wherein the sleeve, in the ejection position, is spaced apart from the end plate (6) such that there is fluid communication (7) for passage of the propellant from the propellant chamber (5), which at least partially surrounds the medium chamber, into the medium chamber (1).
2. The device (10, 20, 30) according to claim 1,
   wherein the sleeve (13, 23, 33) has a collar region (18, 28, 38) which surrounds a region of the ejection tube (2).
3. The device (10, 20, 30) according to claim 2,
   wherein the collar region (18, 28, 38) is arranged between the propellant chamber (5) and a pressure chamber (9), the pressure chamber (9) being designed to hold a pressurised fluid, such that the sleeve (13, 23, 33) is pressed against the end plate (6) by the pressure in the pressure chamber (9).
4. The device (10, 30) according to claim 3,
   wherein the collar region (18, 38) has a first end face (41) facing the pressure chamber (9) and a second end face (42) which is smaller than the first end face (41) and which faces the propellant chamber (5).
5. The device (10) according to claim 3 or 4,
   wherein the collar region (18) is provided with at least one non-return valve (45) designed for passage of propellant from the pressure chamber (9) to the propellant chamber (5).
6. The device (10, 20, 30) according to any one of the preceding claims,
   wherein the sleeve (13, 23, 33) has a shoulder (47, 48) on its inner side near the collar region (18, 28, 38), where an inner cross-section of the sleeve is substantially equal to an inner cross-section of the ejection tube (2).
7. The device (10, 30) according to claim 6,
   wherein the shoulder (47) is formed by a projection and the inner cross-section of the sleeve (13, 33) widens towards the end plate (6) in part of the sleeve (13, 33).
8. A device (50) for impulse ejection of medium having the features according to one of claim 1 to 7, further comprising

   a device body (51) having a medium chamber (1) for holding medium, said medium chamber being defined at least in part by an ejection tube (2), and a propellant chamber (5) for holding a propellant for impulse-like expulsion of the medium through an ejection end (4) of the ejection tube (2),

   a release handle (52) attached to the device body (51), for holding the device with one hand of the user and for triggering the impulse ejection, and

   a grip (53) attached to the device body for holding the device (50) with the other hand of the user,

   wherein the grip (53) and/or the release handle (52) are designed to rotate about an axis parallel to the direction of impulse ejection.
9. The device (50) according to claim 8,

   having a shutoff valve (54) for a supply line (55) for supplying medium to the medium chamber (1),

   wherein the grip (53) is designed to be moved along the ejection tube (2) between an open position and a closed position,

   wherein the grip (53) is coupled to the shutoff valve (54) in such a way that the shutoff valve (54) is opened by moving the grip (53) into the open position, to allow medium to pass through, and the shutoff valve (54) can be closed by moving the grip (53) into the closed position.
10. The device (50) according to claim 8 or 9,
    wherein the rotatable grip or handle (52, 53) is fitted with a fixing device which allows the grip or handle (52, 53) to be selectively fixed or released for rotation.
11. A method for impulse ejection of medium, comprising the steps of:

    filling (101) a medium chamber (1) of a device (10, 20, 30, 50) for impulse ejection with medium, wherein the medium chamber (1) is defined by an ejection tube (2) and a sleeve (13, 23, 33), the sleeve (13, 23, 33) adjoining the ejection tube (2) opposite from the ejection end (4) thereof, and

    filling (102) a propellant chamber (5) of the device (10, 20, 30, 50) with pressurised propellant, said propellant chamber (5) surrounding at least partially the medium chamber (1) in the region of the sleeve (13, 23, 33),

    wherein the sleeve (13, 23, 33), after the steps of filling (101, 102), is held in a pressure position in which the sleeve (13, 23, 33) seals the medium chamber (1) with an end plate (6) against the propellant chamber (5),

    wherein the sleeve (13, 23, 33), in a following release step (103), is released for movement from the pressure position to an ejection position in which the sleeve (13, 23, 33) is moved by the pressurised propellant in such a way that, as a result of said movement, the sleeve (13, 23, 33) is spaced apart from the end plate (6) and fluid communication (7) is formed for the passage of propellant out of the propellant chamber (5), which at least partially surrounds the medium chamber, into the medium chamber (1),

    wherein the propellant ejects the medium in an impulse-like manner through the ejection end (4) in an impulse step (104).

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