CN111804046A - Pneumatic control type anti-blocking system for floor drain - Google Patents
Pneumatic control type anti-blocking system for floor drain Download PDFInfo
- Publication number
- CN111804046A CN111804046A CN202010675108.6A CN202010675108A CN111804046A CN 111804046 A CN111804046 A CN 111804046A CN 202010675108 A CN202010675108 A CN 202010675108A CN 111804046 A CN111804046 A CN 111804046A
- Authority
- CN
- China
- Prior art keywords
- annular
- fixedly connected
- chamber
- plate
- floor drain
- 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- Withdrawn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
- 230000005389 magnetism Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 abstract description 4
- RSMUVYRMZCOLBH-UHFFFAOYSA-N metsulfuron methyl Chemical compound COC(=O)C1=CC=CC=C1S(=O)(=O)NC(=O)NC1=NC(C)=NC(OC)=N1 RSMUVYRMZCOLBH-UHFFFAOYSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
- B01D29/72—Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0407—Floor drains for indoor use
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
Abstract
The invention discloses a pneumatic control type anti-blocking system for floor drain, which comprises a shell, wherein a detachable filter screen is fixedly connected to the inner wall of the shell, which is close to the upper end, an annular block is fixedly connected to the inner wall of the shell, an annular cavity is arranged inside the annular block, the bottom of the annular cavity is communicated with an air inlet pipe, an annular plate is connected to the inner wall of the annular cavity in a sealing and sliding manner, two connecting rods are fixedly connected to the upper wall of the annular plate, the two connecting rods extend out of the annular cavity and are fixedly connected with a filter plate together, a fixing strip is fixedly connected to the side wall of the inner ring of the annular block, a placing cavity is arranged inside the fixing strip and is communicated with the annular cavity. On one hand, the invention can brush off the sticky impurities attached to the filter plate to ensure the drainage effect of the device, and on the other hand, the manual operation is not needed, thereby bringing convenience to users.
Description
Technical Field
The invention relates to the technical field of drainage equipment, in particular to a pneumatic control anti-blocking system for a floor drain.
Background
The floor drain is an important interface for connecting a drainage pipeline system with the indoor ground, is generally arranged in kitchens, bathrooms and other places, and the existing floor drain generally only filters sundries by arranging a filter screen to prevent the sundries from entering a drainage pipeline to cause blockage, but has certain problems, because the floor drain is generally arranged at a lower position on the ground, the water flow flowing into the floor drain can carry sticky sundries such as soil and the like, the impurities are easy to be attached to the filter holes of the filter screen along with the water flow flowing into the floor drain to cause the blockage of the filter holes, thereby affecting the normal drainage effect of the floor drain, the apertures of the filter holes are generally small, the impurities attached in the filter holes are difficult to clean in a manual cleaning mode, great inconvenience is brought to later maintenance, so a pneumatic control type anti-blocking system for floor drain needs to be designed to solve the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a pneumatic control anti-blocking system for a floor drain.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pneumatic control type anti-blocking system for floor drain comprises a shell, wherein a detachable filter screen is fixedly connected to the inner wall of the shell close to the upper end, an annular block is fixedly connected to the inner wall of the shell, an annular cavity is arranged inside the annular block, an air inlet pipe is communicated with the bottom of the annular cavity, an annular plate is connected to the inner wall of the annular cavity in a sealing and sliding manner, two connecting rods are fixedly connected to the upper wall of the annular plate, both the two connecting rods extend out of the annular cavity and are fixedly connected with a filter plate together, a fixing strip is fixedly connected to the inner ring side wall of the annular block, a placing cavity is arranged inside the fixing strip and is communicated with the annular cavity through a connecting pipe, the bottom of the placing cavity is rotatably connected with a rotating rod through a bearing, the rotating rod extends out of the placing cavity and is fixedly, two the inside two fixed chambeies that all are equipped with of rotor plate, four fixed intracavity bottom all has a movable plate, four through pressure spring elastic connection the equal fixedly connected with montant of movable plate upper wall, four the montant all extends to outside the fixed chamber, is located two of homonymy the common fixedly connected with brush board in montant upper end.
Preferably, the connecting pipe is provided with a pressure valve, and the air inlet pipe is provided with a one-way valve.
Preferably, the annular plate upper wall is elastically connected with the top in the annular cavity through two tension springs, and the two tension springs are sleeved on the two connecting rod side walls respectively.
Preferably, the inside supplementary chamber that is equipped with of dwang, supplementary intracavity portion is equipped with the carriage release lever that can slide from top to bottom, the carriage release lever upper end extends to outside the supplementary chamber and fixedly connected with rotates the magnetic stripe, it strikes the pole to rotate magnetic stripe upper wall fixedly connected with, the fixed permanent magnetism strip that inlays of filter plate lower wall.
Preferably, the longitudinal section of the moving rod is of a T-shaped structure, the auxiliary cavity is a rectangular cavity, and the cross section of the moving rod is of a rectangular structure.
The invention has the following beneficial effects:
1. compared with the prior art, after the filter holes of the filter plate are blocked, the filter plate is downwards extruded along with the increase of accumulated water on the filter plate to drive the annular plate to move, so that air in the annular cavity is extruded into the placing cavity, the pneumatic blades are rotated, the rotating rod and the rotating plate are further driven to rotate, the brush plate is rotated, and viscous impurities attached to the filter plate can be brushed off, so that the drainage effect of the filter plate is ensured, manual operation is not needed, and convenience is brought to users;
2. compared with the prior art, the rotating rod can drive the rotating magnetic strip to rotate when rotating, magnetic poles at two ends of the rotating magnetic strip are continuously exchanged, the rotating magnetic strip is driven to reciprocate up and down by matching with the magnetic force of the permanent magnetic strip, the knocking rod is driven to reciprocate up and down, the filter plate can be knocked continuously, and the filter plate is vibrated, so that impurities attached to the filter plate are more easily fallen off, the cleaning effect of the device on the filter plate is further improved, and the drainage effect of the device is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a pneumatic control anti-clogging system for floor drain according to the present invention;
fig. 2 is an enlarged view of a structure at a position a of the pneumatic anti-clogging system for floor drain provided by the invention.
In the figure: the device comprises a shell 1, a filter screen 2, a connecting rod 3, a filter plate 4, a brush plate 5, a vertical rod 6, a fixed cavity 7, a rotating plate 8, a moving plate 9, an annular block 10, an annular cavity 11, an annular plate 12, a connecting pipe 13, a placing cavity 14, a rotating blade 15, a rotating rod 16, an air inlet pipe 17, a permanent magnet strip 18, a knocking rod 19, a rotating magnetic strip 20, an auxiliary cavity 21, a moving rod 22 and a fixed strip 23.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-2, a formula of preventing blockking up is prevented with gas accuse to floor drain, includes shell 1, and inner wall fixedly connected with detachable filter screen 2 that shell 1 is close to the upper end, and filter screen 2 accessible bolt etc. instrument are fixed at shell 1 inner wall, mainly used filters great debris, prevents that great debris from getting into shell 1 inside and causing the damage to the device, and the user only need clear up great debris on the filter screen 2 can.
1 inner wall fixedly connected with annular piece 10 of shell, the inner circle lateral wall of annular piece 10 is the inclined plane, the inside annular chamber 11 that is equipped with of annular piece 10, 11 bottoms of annular chamber intercommunication are equipped with intake pipe 17, be equipped with the check valve in the intake pipe 17, the check valve only allows the air to flow into annular chamber 11 in from the external world, 11 inner wall sealing sliding connection of annular chamber has annular plate 12, top elastic connection in annular plate 12 upper wall is through two extension springs and annular chamber 11, two connecting rods 3 of 12 upper walls fixedly connected with of annular plate, two extension springs overlap respectively and establish two connecting rod 3 lateral walls, two connecting rods 3 all extend to the annular chamber 11 outside and common fixedly connected with filter plate.
The inner ring side wall of the annular block 10 is fixedly connected with a fixed strip 23, a placing cavity 14 is arranged inside the fixed strip 23, the placing cavity 14 is communicated with the annular cavity 11 through a connecting pipe 13, a pressure valve is arranged on the connecting pipe 13, the pressure valve can be opened only when the air pressure in the annular cavity 11 reaches the critical value of the pressure valve, the bottom in the placing cavity 14 is rotatably connected with a rotating rod 16 through a bearing, the rotating rod 16 extends out of the placing cavity 14 and is fixedly connected with two rotating plates 8, a sealing ring is arranged at the penetrating position of the rotating rod 16 and the placing cavity 14 to prevent water from entering the placing cavity 14, the side wall of the rotating rod 16 in the placing cavity 14 is fixedly connected with a plurality of rotating blades 15, two fixed cavities 7 are arranged inside the two rotating plates 8, the bottom in the four fixed cavities 7 is elastically connected with a moving plate 9 through a pressure spring, vertical rods 6 are fixedly connected on the upper walls, the upper ends of the two vertical rods 6 positioned on the same side are fixedly connected with a brush plate 5 together, and the upper wall of the brush plate 5 is attached to the lower wall of the filter plate 4.
When the filter plate is used, large sundries can be blocked by the filter screen 2, small sundries can be blocked by the filter plate 4, and in the long-term use process, because some thick sundries such as soil can exist in water flow, the water flow can block filter holes in the filter plate 4 when passing through the filter plate 4, so that the water flow can not flow down through the filter plate 4 or the drainage efficiency of the filter plate 4 is reduced.
When more filter holes on the filter plate 4 are blocked, the drainage efficiency of the filter plate 4 is reduced, more and more water is accumulated at the upper end of the filter plate 4, the filter plate 4 is pressed downwards under the action of the gravity of the water, the filter plate 4 moves downwards, the annular plate 12 is driven to move downwards through the connecting rod 3, the air in the annular cavity 11 can be compressed, the air pressure in the annular cavity 11 is increased, when the air pressure reaches the critical value of the pressure valve, the pressure valve is opened, the air in the annular cavity 11 is sprayed into the placing cavity 14 through the connecting pipe 13, the air flow sprayed at high speed impacts the rotating blade 15 to rotate the rotating blade 15, the rotating rod 16 is driven to rotate, the rotating plate 8 is driven to rotate, the brush plate 5 is driven to rotate, impurities such as sludge on the filter plate 4 can be brushed off, the drainage effect of the filter plate 4 is ensured, when the water on the filter plate 4 is reduced, the annular plate 12 moves upwards under the action, outside air is sucked into the annular cavity 11 through the air inlet pipe 17, and the filter plate 4 is driven to move upwards, so that the device is restored to the initial state.
It is noted that the jade filter plate 4 is jointed in the brush plate 5 stone in the process of moving the filter plate 4 up and down.
When the rotating rod 16 rotates, the moving rod 22 can be driven to rotate, and then the rotating magnetic strip 20 is driven to rotate, when the magnetic poles opposite to the two ends of the rotating magnetic strip 20 and the permanent magnetic strip 18 are heteropolar, the permanent magnetic strip 18 attracts the rotating magnetic strip 20 to move upwards, when the magnetic poles opposite to the two ends of the rotating magnetic strip 20 and the permanent magnetic strip 18 are homopolar, under the action of the repulsive force of the permanent magnetic strip 18, the rotating magnetic strip 20 moves downwards, the beating rod 19 is driven to move upwards when the rotating magnetic strip 20 moves upwards, the beating rod 19 beats the filter plate 4 to vibrate the filter plate 4, and then sticky impurities attached to the filter plate 4 are more easily fallen off, the rotation of the brush plate 5 is matched, and the cleaning effect of the device on the filter plate 4 is further improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides a floor drain is with gas accuse formula anti-clogging system, includes shell (1), its characterized in that: the inner wall fixedly connected with detachable filter screen (2) near the upper end of the shell (1), the inner wall fixedly connected with annular block (10) of the shell (1), the inside annular chamber (11) that is equipped with of annular block (10), the intercommunication of annular chamber (11) bottom is equipped with intake pipe (17), the sealed sliding connection of annular chamber (11) inner wall has annular plate (12), the upper wall fixedly connected with of annular plate (12) has two connecting rods (3), two connecting rods (3) all extend to the outside of annular chamber (11) and fixedly connected with filter plate (4) jointly, the inner circle lateral wall fixedly connected with fixed strip (23) of annular block (10), the inside chamber (14) of placing that is equipped with of fixed strip (23), place chamber (14) and communicate with annular chamber (11) through connecting pipe (13), place chamber (14) bottom and be connected with dwang (16) through bearing rotation, dwang (16) extend to place two rotor plates (8) of outer and fixedly connected with of chamber (14), dwang (16) are located a plurality of rotor blades (15) of lateral wall fixedly connected with of placing chamber (14), two rotor plate (8) are inside all to be equipped with two fixed chambeies (7), four the bottom all has movable plate (9), four through pressure spring elastic connection in fixed chamber (7) the equal fixedly connected with montant (6) of movable plate (9) upper wall, four montant (6) all extend to outside fixed chamber (7), are located two of homonymy montant (6) upper end common fixedly connected with brush board (5).
2. The pneumatic control type anti-blocking system for the floor drain according to claim 1, characterized in that: the pressure valve is arranged on the connecting pipe (13), and the one-way valve is arranged on the air inlet pipe (17).
3. The pneumatic control type anti-blocking system for the floor drain according to claim 1, characterized in that: the upper wall of the annular plate (12) is elastically connected with the inner top of the annular cavity (11) through two tension springs, and the two tension springs are respectively sleeved on the side walls of the two connecting rods (3).
4. The pneumatic control type anti-blocking system for the floor drain according to claim 1, characterized in that: dwang (16) inside is equipped with supplementary chamber (21), supplementary chamber (21) inside is equipped with movable rod (22) that can slide from top to bottom, movable rod (22) upper end extends to supplementary chamber (21) outer and fixedly connected with rotates magnetic stripe (20), rotate magnetic stripe (20) upper wall fixedly connected with and strike pole (19), filter plate (4) lower wall fixed embedding is equipped with permanent magnetism strip (18).
5. The pneumatic control type anti-blocking system for the floor drain according to claim 4, wherein: the longitudinal section of the moving rod (22) is of a T-shaped structure, the auxiliary cavity (21) is a rectangular cavity, and the cross section of the moving rod (22) is of a rectangular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010675108.6A CN111804046A (en) | 2020-07-14 | 2020-07-14 | Pneumatic control type anti-blocking system for floor drain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010675108.6A CN111804046A (en) | 2020-07-14 | 2020-07-14 | Pneumatic control type anti-blocking system for floor drain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111804046A true CN111804046A (en) | 2020-10-23 |
Family
ID=72842504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010675108.6A Withdrawn CN111804046A (en) | 2020-07-14 | 2020-07-14 | Pneumatic control type anti-blocking system for floor drain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111804046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412603A (en) * | 2020-11-19 | 2021-02-26 | 李学靖 | Novel tail gas carbon deposition processing structure of car |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532732A (en) * | 2018-05-21 | 2018-09-14 | 夏柱飞 | A kind of anti-clogging inspection well cover |
| CN109113097A (en) * | 2018-08-21 | 2019-01-01 | 田希良 | A kind of thimble-type based on hydraulic pressure is from dredging composite manhole cover |
| KR20190042795A (en) * | 2017-10-17 | 2019-04-25 | 정일화 | Sewer manhole device with foreign matter filtration fan |
| CN110380346A (en) * | 2019-08-08 | 2019-10-25 | 朱蛟龙 | It is a kind of can automated cleaning air filtration dustproof power power distribution cabinet |
| CN210066953U (en) * | 2019-06-06 | 2020-02-14 | 中恩工程技术有限公司 | Structure that prevents blockking up in municipal drainage ditch |
-
2020
- 2020-07-14 CN CN202010675108.6A patent/CN111804046A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190042795A (en) * | 2017-10-17 | 2019-04-25 | 정일화 | Sewer manhole device with foreign matter filtration fan |
| CN108532732A (en) * | 2018-05-21 | 2018-09-14 | 夏柱飞 | A kind of anti-clogging inspection well cover |
| CN109113097A (en) * | 2018-08-21 | 2019-01-01 | 田希良 | A kind of thimble-type based on hydraulic pressure is from dredging composite manhole cover |
| CN210066953U (en) * | 2019-06-06 | 2020-02-14 | 中恩工程技术有限公司 | Structure that prevents blockking up in municipal drainage ditch |
| CN110380346A (en) * | 2019-08-08 | 2019-10-25 | 朱蛟龙 | It is a kind of can automated cleaning air filtration dustproof power power distribution cabinet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412603A (en) * | 2020-11-19 | 2021-02-26 | 李学靖 | Novel tail gas carbon deposition processing structure of car |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201023 |
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| WW01 | Invention patent application withdrawn after publication |