EP4133201A1 - Valve and use of a damping device - Google Patents
Valve and use of a damping deviceInfo
- Publication number
- EP4133201A1 EP4133201A1 EP21707931.8A EP21707931A EP4133201A1 EP 4133201 A1 EP4133201 A1 EP 4133201A1 EP 21707931 A EP21707931 A EP 21707931A EP 4133201 A1 EP4133201 A1 EP 4133201A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- damping
- valve body
- open position
- closed position
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000013016 damping Methods 0.000 title claims abstract description 138
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 239000012530 fluid Substances 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 238000011161 development Methods 0.000 description 7
- 230000000284 resting effect Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D3/00—Flushing devices operated by pressure of the water supply system flushing valves not connected to the water-supply main, also if air is blown in the water seal for a quick flushing
- E03D3/02—Self-closing flushing valves
- E03D3/04—Self-closing flushing valves with piston valve and pressure chamber for retarding the valve-closing movement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/01—Damping of valve members
- F16K47/011—Damping of valve members by means of a dashpot
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
- F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/56—Mechanical actuating means without stable intermediate position, e.g. with snap action
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/02—Plumbing installations for fresh water
- E03C1/04—Water-basin installations specially adapted to wash-basins or baths
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/02—Plumbing installations for fresh water
- E03C2001/026—Plumbing installations for fresh water with flow restricting devices
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D5/00—Special constructions of flushing devices, e.g. closed flushing system
- E03D5/02—Special constructions of flushing devices, e.g. closed flushing system operated mechanically or hydraulically (or pneumatically) also details such as push buttons, levers and pull-card therefor
- E03D5/09—Special constructions of flushing devices, e.g. closed flushing system operated mechanically or hydraulically (or pneumatically) also details such as push buttons, levers and pull-card therefor directly by the hand
Definitions
- the invention relates to a valve, in particular a piston valve, with a stationary housing part and an actuating element which can be adjusted relative to the housing part and which is in operative connection with a valve body, the valve body being between an open position releasing an outlet and a closed position closing the outlet by actuation of the actuating element is adjustable.
- Valves of the type mentioned at the outset are known per se and are used, for example, in the sanitary sector. They can be used to regulate a water outlet in that the water outlet can be closed or released by means of the valve.
- the invention is therefore based on the object of creating a valve of the type mentioned at the beginning which fulfills the pressure hammer values specified by DIN EN 15091: 2014-03.
- a valve of the type mentioned at the outset is proposed according to the invention to achieve the object, which thereby is characterized in that the valve has a damping device with a damping element adjustable relative to the actuating element and / or the fixed housing part, that at least one return of the valve body from the open position to the closed position is damped by the damping device.
- the valve has a damping device with a damping element adjustable relative to the actuating element and / or the fixed housing part, that at least one return of the valve body from the open position to the closed position is damped by the damping device.
- the term fixed can refer, for example, to an installation situation. If the valve is inserted into a corresponding valve seat, the stationary housing part is not adjusted relative to the valve seat when the valve is actuated.
- the damping device can have a damping chamber in which the damping element is arranged.
- the damping element can be designed, for example, as an axially adjustable damping piston.
- the damping element can subdivide the damping chamber into two sub-chambers, their respective volumes in Can be changed as a function of the closed position and / or the open position of the valve.
- the damping element can be adjusted within the damping chamber.
- a damping force can be generated which counteracts the adjusting force acting on the valve body at least during a closing process of the valve.
- the damping device can thus be used to set up a resistance against which the valve body must be adjusted. As a result, at least the closing time of the valve can be increased and pressure surges can be reduced.
- the valve can have a push-push adjustment mechanism that can be actuated by the actuating element.
- a bistable adjustment of the valve body between the open position and the closed position can take place in each case by pressing the actuating element.
- the operation of the valve is simplified and, on the other hand, it is almost impossible for a user to operate the valve incorrectly.
- more than two bistable positions can be set by means of the push-push adjustment mechanism, so that at least one intermediate position between the maximum open position and the closed position can be set with reduced flow.
- the damping device has a damping fluid, in particular an oil, which can be or is displaced by the damping element at least when the valve body is moved back from the open position to the closed position.
- the damping fluid can preferably be displaced or displaced by a regulating gap, preferably variable in its size, and / or a bypass.
- a regulating gap preferably variable in its size, and / or a bypass.
- the regulating gap can therefore be formed between the sub-chambers.
- a bypass can be formed between the sub-chambers, which is open regardless of the direction of movement of the valve body, so that, for example, damping fluid flows through the bypass when the valve body is adjusted.
- the regulating gap can preferably be completely closed by a regulating element when the valve body is moved back from the open position to the closed position, so that the damping fluid can flow exclusively through the bypass.
- the damping element is at least in an open position at a distance from a stop formed by the stationary housing part.
- the damping element can rest against a stop formed by the stationary housing part, at least in a closed position.
- the damping device and in particular the damping element can be moved back up to the stop until the damping element finally rests against the stop.
- the damping element In order to achieve complete closure of the valve, the damping element must now be pressed against the stop and is moved relative to the damping chamber. The damping element is retracted against a damping force generated by the damping device. With that, the Closing time of the valve can be increased so that the valve body is moved more slowly into the valve seat.
- a spring element is arranged within the damping chamber, in particular within a sub-chamber of the damping chamber, preferably which is compressed in a closed position of the valve and / or which is relaxed in an open position of the valve.
- the damping element can be adjusted, in particular retracted, against the spring force of the spring element during a closing process of the valve.
- the damping element can be extended again by the spring force of the spring element if the distance between the damping chamber and the stop increases.
- the valve has a restoring element which is arranged in such a way that the valve body can be or is adjusted against the restoring force of the restoring element of the valve during an adjustment from the closed position to the open position and / or that a The valve body is reset from the open position to the closed position at least partially by the restoring force of the restoring element.
- the restoring element can for example be designed as a spring.
- the restoring element can preferably be supported on a stationary part, in particular on one or the stationary housing part, of the valve and on the valve body, or at least transmit a force to it in each case.
- the valve body can have a valve piston which, in the closed position, closes a valve seat of the valve and / or which in the open position is adjusted out of the valve seat in the direction of the outlet.
- the valve seat can preferably open and / or widen in the direction of the outlet. An improved closing of the valve can thus be achieved.
- the damping device can have at least one control element, by means of which an opening dimension of a control gap between two sub-chambers of a damping chamber, for example the aforementioned damping chamber, is dependent on the adjustment direction of the damping element and / or the valve body can be changed or is changed.
- the regulating gap can preferably be adjustable in such a way that the opening dimension of the regulating gap is smaller when the valve body is moved from the open position to the closed position than when the valve body is moved from the closed position to the open position.
- a greater damping effect can be set during a closing process than during an opening process.
- the regulating gap can be completely closed when the valve body is moved from the open position to the closed position. When moving from the closed position to the open position, it can be provided that the regulating element releases the regulating gap, in particular so that the regulating gap is open to the maximum.
- the regulating body is preferably designed as at least one O-ring.
- the valve body is in an operative connection with the damping device.
- the operative connection can be set up in such a way that the valve body adjustably acts on the damping device.
- the damping element can be pressed against a stop or the stop by a force transmitted from the valve body to the damping device and / or the damping element can be adjusted or adjusted relative to the damping chamber. The closing time of the valve can thus be set easily and constantly.
- a valve seat in particular the valve seat already mentioned, is arranged between an inlet chamber of a fluid and an outlet chamber of the fluid, the valve seat opening in the direction of the outlet chamber, and the valve body through the inlet space is passed through, and that the valve body is led out with its free end from the outlet space, in particular is led out into an air-filled space in which atmospheric pressure prevails. It is thus possible to adjust the valve body without counterpressure from a line downstream of the outlet.
- a boundary, in particular a distal boundary, of the outlet space is set up at least partially via at least one outlet space seal.
- the outlet chamber seal can be arranged between a side wall of the valve body and an inner wall of the outlet chamber.
- the outlet chamber seal can preferably be arranged on the valve body and / or can be adjusted together with the valve body.
- the invention also relates to the use of a damping device for damped return adjustment of the valve body of a valve, in particular as described herein is described and / or claimed, from the open position to the closed position to avoid pressure surges.
- Embodiments limited. Further exemplary embodiments result from the combination of the features of individual or multiple claims with one another and / or with individual or multiple features of the exemplary embodiments.
- FIG. 1 shows a sectional view of a possible embodiment of a valve according to the invention, the valve being shown in an open position in which the outlet is opened to the maximum, the damping element being extended and spaced from a stop of the stationary housing part,
- FIG. 2 shows a sectional view of the possible embodiment of the valve according to the invention from FIG. 1, the valve being shown in a partially open position during a closing process, the damping element being partially retracted and resting against the stop of the stationary housing part,
- FIGS. 3 shows a sectional view of a possible embodiment of the valve according to the invention from FIGS. 1 and 2, the valve being shown in a closed position in which the outlet is completely closed, the damping element being fully retracted and resting against the stop of the stationary housing part , 4 shows a perspective illustration of the embodiment of the valve according to the invention according to FIGS. 1-3,
- FIGS. 1-4 shows an exploded view of the embodiment of the valve according to the invention according to FIGS. 1-4,
- Fig. 6 is a detailed view of a possible
- FIG. 7 shows a sectional view of a further possible embodiment of a valve according to the invention, the valve being shown in an open position in which the outlet is opened to the maximum, the damping element being extended and spaced from a stop of the stationary housing part, the embodiment variant shown being independent of counterpressure is formed in that the valve body is led out of the outlet space,
- FIG. 8 shows a sectional view of the possible embodiment of the valve according to the invention from FIG. 7, the valve being shown in a partially open position during a closing process, the damping element being partially retracted and resting against the stop of the stationary housing part,
- FIGS. 7 and 8 show a sectional view of a possible embodiment of the valve according to the invention from FIGS. 7 and 8, the valve being shown in a closed position in which the outlet is completely closed, the damping element being fully retracted and resting against the stop of the stationary housing part .
- FIGS. 1-5 and FIGS. 7-9 each show a possible one Embodiment of a valve according to the invention, which is designated as 1 as a whole. However, the invention is not limited to these embodiments.
- the valve 1 can be designed, for example, as a directly switchable piston valve.
- valve 1 is shown in the position of use, in which it is inserted into a corresponding valve receptacle 23 in order to separate an inflow 27 from an outflow 25.
- the valve 1 can have a coupling point and the valve receptacle 23 can have a counter-coupling point corresponding thereto.
- the valve 1 has at least one stationary housing part 2 and an actuating element 3 that is adjustable relative to the housing part 2.
- the actuating element 3 can be designed to be manually operable, for example as a push button.
- the actuating element 3 can be actuated, the actuating element 3 being in operative connection with a valve body 4.
- the valve body 4 can thus be adjusted between an open position releasing an outlet 5 and a closed position closing the outlet 5 by actuating the actuating element 3.
- the valve body 4 can be decoupled from the actuating element 3 at least over part of the adjustment path during a switching process. A relative movement between the actuating element 3 and the valve body 4 is thus possible.
- the valve 1 has a damping device 6 (see FIG. 6).
- the damping device 6 is set up to reduce a closing speed of the valve body 4 during a closing process in order to increase the closing time compared to valves without a damping device 6.
- the damping device 6 comprises at least one damping element 7 that is adjustable relative to the actuating element 3 and / or the fixed housing part 2 he follows.
- damping device 6 By means of the damping device 6, it is thus possible to prevent the occurrence of pressure surges, at least when the valve 1 is closed, or to reduce the intensity of the pressure surges at least to a value that meets DIN EN 15091: 2014-03.
- the damping device 6 of the embodiment variants shown in FIGS. 1-5 and 7-9 each comprise a damping chamber 8 in which the damping element 7 is arranged.
- the damping element 7 and / or a regulating gap 13 can subdivide the damping chamber 8 into two sub-chambers 9, 10, the respective volume of which can be changed as a function of the closed position and / or open position of the valve 1.
- the opening dimension of the regulating gap 13 is determined by a regulating element 19 changeable.
- the regulating element 19 can preferably completely close the regulating gap 13 between the sub-chambers 9, 10, in particular when the valve body 4 is moved from the open position into the closed position.
- the regulating element 19 can narrow the regulating gap 13 or even completely close or open it, depending on the direction in which the damping element 7 is adjusted.
- the damping device 6 from Fig. 6 also has a bypass 32, which the two sub-chambers 9, 10 in addition to
- Control gap 13 connects to one another and allows a steady flow of damping fluid 12, regardless of the direction in which the damping element 7 is moved.
- the opening dimension of the bypass 32 is therefore independent of the regulating element 19 and / or constant.
- the valve 1 has a push-push adjustment mechanism 11 that can be actuated by the actuating element 3.
- a bistable adjustment of the valve body 4 between the open position and the closed position is thus possible by pressing the actuating element 3, the push-push adjustment mechanism 11 locking into a stable position by pressing.
- a damping fluid 12, such as an oil, can be arranged in the damping chamber 8.
- the damping fluid 12 can through the damping element 7 at least when the Valve body 4 are displaced from the open position into the closed position.
- the degree of damping of the damping device 6 can thus be adjusted at least partially by the viscosity of the damping fluid 12.
- the damping device 6 has the regulating gap 13 through which the damping fluid 12 can be displaced or is displaced when the valve body 4 is adjusted.
- the degree of damping can thus alternatively or additionally also be set by an opening dimension of the regulating gap 13.
- a stop 14 is formed, which can be acted upon by the damping element 7, in particular with a free end. If the valve 1 is in the open position, the damping element 7 is spaced apart from the stop 14, as shown in FIGS. 1 and 7. During an opening process of the valve 1, the damping element 7 lifts off the stop 14 and / or during a closing process it moves in the direction of the stop 14, as can be seen in FIGS. If the valve 1 is finally in the closed position, as in FIGS. 3 and 9, the damping element 7 contacts the stop 14 formed by the stationary housing part 2.
- a spring element 15 can be arranged inside the damping chamber 8, which is compressed in a closed position of the valve 1 and / or which is relaxed in an open position of the valve 1. During an opening process of the valve 1, the spring element 15 can extend the damping element 7 by means of a spring force generated thereby.
- the valve 1 also has a restoring element 16 which is arranged in such a way that a restoring force that can be generated thereby acts on the valve body 4, the restoring force acting at least against the actuating direction 22 of the actuating element 3. When the valve body 4 is moved from the closed position to the open position, this takes place against the restoring force of the restoring element 16. The restoring element 16 returns the valve body 4 from the open position to the closed position when the actuating element 3 is actuated.
- the valve body 4 has a valve piston 17 which closes a valve seat 18 of the valve 1 in the closed position.
- At least one sealing element 26 can be arranged on the valve piston 17 which, in the closed position, rests against the valve seat 18 and closes the opening of the valve seat 18 in a liquid-tight manner.
- the valve piston 17 In the open position, the valve piston 17 is at least partially spaced from the valve seat 18. The valve piston 17 is adjusted in the direction of the outlet 5 to open the valve 1. The valve seat 18 therefore opens in the direction of the outlet 5.
- the damping device 6 has at least one control element 19, by means of which an opening dimension of the previously mentioned control gap 13 between the two sub-chambers 9, 10 of the damping chamber 8 can be changed or changed depending on the adjustment direction of the damping element 7 and / or the valve body 4. This is preferably done in such a way that the opening dimension of the regulating gap 13 is smaller or larger when the valve body 4 is moved from the open position into the closed position than when the valve body 4 is moved from the closed position into the open position.
- the regulating element 19 can be pressed at least partially into the regulating gap 13 to the extent of the opening to reduce.
- the regulating gap 13 can be formed at least partially by the damping element 7 and / or the damping chamber 8.
- the valve seat 18 is arranged between an inlet space 20 of a fluid and an outlet space 21 of the fluid, the valve seat 18 opening in the direction of the outlet space 21.
- the valve body 4 is passed through the inlet space 20.
- the valve seat 18 thus represents the boundary between the inlet space 20 and the outlet space 21.
- valve 1 According to a variant of the valve 1 shown in FIGS There is pressure. Thus, no counterpressure from a line downstream of the outlet 5 (drain 25) acts on the valve body 4 when it is adjusted.
- the air-filled space 30 is sealed off from the outlet space 21 by an outlet space seal 28.
- the outlet space seal 28 can preferably be arranged on the valve body 4 and / or can be adjusted together with the valve body 4.
- the volume of the outlet space 21 and / or of the air space 30 can thus vary in volume depending on the position of the valve body 4.
- the air-filled space 30 can be connected to the surroundings of the valve 1 by a compensation channel 31. Constant pressure equalization within the air space 30 is thus possible.
- the compensation channel 31 can, as shown in FIGS. 7-9, be at least partially formed by the valve body 4.
- the compensation channel 31 can run through the valve seat 18 and / or the inlet space 20 and / or the outlet space 21.
- the compensation channel 31 is closed with respect to the inlet space 20 and the outlet space 21, so that no fluid can penetrate into the compensation channel 31.
- FIGS. 7-9 has the advantage that the valve body 4 extends with its free end 29 out of the outlet space 21 and / or lies within the air space 30. So that no or only a slight counterpressure from the drain 25 acts on the valve body 4 when the latter is to be adjusted. In particular, it can thus be prevented that a counterpressure acting perpendicular to the adjustment direction of the valve body 4 occurs from the drain.
- the invention thus relates in particular to a valve 1, in particular a piston valve, comprising a stationary housing part 2 and an actuating element 3 which is adjustable relative to the housing part 2 and which is or can be brought into an operative connection with a valve body 4, the valve body 4 between an outlet 5
- the releasing open position and a closed position closing the outlet 5 can be adjusted by actuating the actuating element 3, the valve 1 having a damping device 6 for extending a closing time of the valve 1 by counteracting an adjusting force applied to close the valve 1 with a damping force generated by the damping device is.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202020101991.0U DE202020101991U1 (en) | 2020-04-09 | 2020-04-09 | Valve and use of a damping device |
PCT/EP2021/054341 WO2021204453A1 (en) | 2020-04-09 | 2021-02-22 | Valve and use of a damping device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4133201A1 true EP4133201A1 (en) | 2023-02-15 |
Family
ID=74732894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21707931.8A Withdrawn EP4133201A1 (en) | 2020-04-09 | 2021-02-22 | Valve and use of a damping device |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230110273A1 (en) |
EP (1) | EP4133201A1 (en) |
CN (1) | CN115380184A (en) |
DE (1) | DE202020101991U1 (en) |
WO (1) | WO2021204453A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2147187A1 (en) * | 1971-09-22 | 1973-04-05 | Hansa Metallwerke Ag | PUSH BUTTON VALVE |
JPS5550350U (en) * | 1978-09-29 | 1980-04-02 | ||
DE202016001236U1 (en) * | 2016-01-27 | 2017-02-06 | Suttner Gmbh | manual valve |
FR3071577B1 (en) * | 2017-09-28 | 2020-09-11 | Les Robinets Presto | DEVICE FORMING DELAYED TAP OR TIMING CARTRIDGE FOR A TIMED TAP |
-
2020
- 2020-04-09 DE DE202020101991.0U patent/DE202020101991U1/en active Active
-
2021
- 2021-02-22 US US17/913,330 patent/US20230110273A1/en not_active Abandoned
- 2021-02-22 CN CN202180026803.2A patent/CN115380184A/en active Pending
- 2021-02-22 WO PCT/EP2021/054341 patent/WO2021204453A1/en active Search and Examination
- 2021-02-22 EP EP21707931.8A patent/EP4133201A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
US20230110273A1 (en) | 2023-04-13 |
DE202020101991U1 (en) | 2021-07-12 |
CN115380184A (en) | 2022-11-22 |
WO2021204453A1 (en) | 2021-10-14 |
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