CN113650179A - Building rectangular hole lateral wall chisel hair device - Google Patents
Building rectangular hole lateral wall chisel hair device Download PDFInfo
- Publication number
- CN113650179A CN113650179A CN202111008056.8A CN202111008056A CN113650179A CN 113650179 A CN113650179 A CN 113650179A CN 202111008056 A CN202111008056 A CN 202111008056A CN 113650179 A CN113650179 A CN 113650179A
- Authority
- CN
- China
- Prior art keywords
- shell
- fixed
- chiseling
- rectangular box
- sleeve
- 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- Withdrawn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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/26—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by impact tools, e.g. by chisels or other tools having a cutting edge
- B28D1/28—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by impact tools, e.g. by chisels or other tools having a cutting edge without cutting edge, e.g. chiseling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
Abstract
The invention provides a building rectangular hole side wall chiseling device, which effectively solves the problems that chiseling equipment in the prior art cannot meet the chiseling requirements of rectangular holes and the side walls of drainage channels, the chiseling force is uneven, the chiseling effect is poor, and time and labor are wasted; the technical scheme for solving the problem is that the device comprises a bottom plate, a top plate is arranged above the bottom plate, a first reciprocating screw rod structure is arranged between the bottom plate and the top plate, a sleeve is arranged on the first screw rod, the sleeve and a first nut are fixed together, and a plurality of scabbling units are arranged around the sleeve; the scabbling unit comprises a shell, a sliding rod is arranged on the shell, the upper end of the sliding rod is fixed with a top plate, small chain wheels are arranged on the upper side and the lower side of the shell, the two small chain wheels are driven by a chain, rolling chain wheels are arranged in the shell, a rectangular box is arranged on the outer side of the shell, a second reciprocating screw rod structure is arranged in the rectangular box, a guide rod is arranged in the rectangular box, a sliding block is arranged on the guide rod, and a scabbling disc is arranged on the outer side of the sliding block; a flat plate is arranged on one side of the shell, a rubber disc is arranged on the rectangular box, and a compression screw is arranged on the flat plate.
Description
Technical Field
The invention relates to the technical field of construction machinery, in particular to a building rectangular hole side wall chiseling device.
Background
In construction, roughening is common, for example, in the installation of anchors, in the holes, and for example, in the walls of the substrate prior to waterproofing. In construction, I-steel or rectangular steel is often used as a girder or a load-bearing part, the end of the I-steel or rectangular steel is often required to be firmly fixed in a wall, a reserved hole is required to be roughened before installation, and friction is increased. In addition, when the waterproof layer of the drainage channel is operated, the wall surface needs to be roughened, and the bonding strength between the waterproof material and the base body is increased.
Among the prior art, the chisel hair machine can only handle naked surface mostly, to the water drainage tank inside wall in hole or corner after the concrete drilling, can't chisel hair to it, traditional hole chisel hair mode adopts the steel sheet to beat in the hole, destroy the hole wall and make it become coarse increase frictional force, adopt this kind of mode to chisel hair and handle, the steel sheet swings the angle in the hole limited, the point of handling is only limited to the steel sheet pointed end, it stirs the steel sheet constantly to need the operation personnel, physical demands to the operation personnel is great, and the effect of handling is decided to people's strength in stirring process, the easy is serious to the inside destruction of base member when strength is great, influence base member surface structure, the condition of wall body fracture appears even, chisel hair effect is uneven. And because the cross-section of rectangular hole and water drainage tank is the rectangle, can't effectively chisel makeing to the corner.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the building rectangular hole side wall chiseling device, which effectively solves the problems that chiseling equipment in the prior art cannot meet the chiseling of a rectangular hole and cannot meet the chiseling of the side wall of a drainage channel, the chiseling force is uneven, the chiseling effect is poor, and time and labor are wasted.
The technical scheme includes that the device comprises a horizontal bottom plate, a horizontal top plate is arranged above the bottom plate, a vertical and rotatable first reciprocating screw rod structure is arranged between the bottom plate and the top plate, the upper end of a first screw rod is rotatably connected with the top plate, a sleeve is sleeved on the first screw rod and fixed with a first nut, the first screw rod rotates to drive the sleeve to move up and down through the first nut, and a plurality of scabbling units are arranged around the sleeve;
the scabbling unit comprises a shell, the shell is positioned outside a sleeve, a sliding rod vertically penetrates through the shell, the upper end of the sliding rod is fixed with a top plate, the lower end of the sliding rod is fixed with a bottom plate, the upper side and the lower side of the shell are respectively provided with a small chain wheel capable of rotating, the two small chain wheels are in chain transmission, a rolling chain wheel meshed with a chain is arranged in the shell, a central shaft of the rolling chain wheel penetrates through the shell and is rotatably connected with the sleeve, the outer side of the shell is provided with a rectangular box with an outward opening, a second reciprocating lead screw structure arranged along the length direction of the rectangular box is arranged in the rectangular box, a worm wheel drives a second lead screw to rotate through a gear set, a guide rod parallel to the second lead screw is arranged in the rectangular box, a sliding block is arranged on the guide rod, a second nut is fixed with the sliding block, and a scabbling disk is arranged outside the sliding block;
a flat plate is fixed on one side, close to the rectangular box, of the shell, a rubber disc is arranged on the rectangular box, a compression screw penetrates through the flat plate, and the rectangular box and the shell can be fixed together by screwing the compression screw.
Furthermore, the upper end of the first lead screw is connected with a first motor, and the first motor is fixed on the top plate.
Furthermore, vertical plates are arranged on the bottom plate and the top plate, and the small chain wheels are rotationally fixed on the vertical plates.
Furthermore, a first bevel gear is coaxially fixed on the small chain wheel on the upper side, a plurality of second bevel gears in one-to-one correspondence with the first bevel gears are rotatably connected on the top plate, the first bevel gears are meshed with the second bevel gears, a transmission chain wheel is coaxially fixed at the upper end of each second bevel gear, the plurality of transmission chain wheels are connected together through a chain, one of the transmission chain wheels is connected with a second motor, and the second motor is fixed on the top plate.
Furthermore, the gear set comprises a large gear, the large gear is coaxially fixed with the rolling chain wheel, a small gear is rotatably connected in the rectangular box, a large bevel gear is coaxially fixed on the small gear, a small bevel gear is fixed on the second screw rod, and the large bevel gear is meshed with the small bevel gear.
Furthermore, the lower end of the bottom plate is penetrated with a pin shaft capable of rotating, the lower end of the pin shaft is hinged with a movable rod, two adjacent movable rods are connected through a pressure spring, the lower end of each movable rod deflects outwards, a cylinder is sleeved at the lower end of each movable rod, the movable rods are inserted into the cylinders, and the pressure springs are connected between the bottom of each cylinder and the lower end of each movable rod.
Furthermore, the slider on be fixed with the horizontal screw rod, be fixed with the screwed pipe that corresponds with the screw rod on the chisel hair dish, through threaded connection between screw rod and the screwed pipe, the welding has a plurality of screws on the chisel hair dish, has a plurality of toper pieces on the screw, toper piece is in the same place through threaded connection with the screw.
The water drainage channel is ingenious in structure, can be well suitable for rectangular hole scabbling, can be used for uniformly scabbling the inner wall of the water drainage channel, can be used for effectively scabbling the inner sides of inner corners and dead corners, can also be used for locally scabbling the inner sides of the inner corners and the dead corners, meets production requirements, is uniform in scabbling force, reduces labor force, saves time and labor, and is high in adaptability.
Drawings
FIG. 1 is a front view of the present invention.
Fig. 2 is a front cross-sectional view of the present invention.
FIG. 3 is a schematic diagram showing the positional relationship among the small sprocket, the slide bar and the housing of the same roughening unit.
Fig. 4 is a top cross-sectional view of the present invention.
Fig. 5 is an enlarged view of a portion a in fig. 2.
FIG. 6 is a schematic view of the installation of multiple drive sprockets according to the present invention.
Fig. 7 is a bottom view of the present invention.
Fig. 8 is a state diagram of the present invention in use.
Figure 9 shows a first chisel edge disk design of the present invention.
Figure 10 shows a second chisel edge disk design of the present invention.
Detailed Description
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 10, the invention includes a horizontal bottom plate 1, a horizontal top plate 2 is arranged above the bottom plate 1, a vertical and rotatable first reciprocating screw structure is arranged between the bottom plate 1 and the top plate 2, wherein the upper end of a first screw 3 is rotatably connected with the top plate 2, a sleeve 4 is sleeved on the first screw 3, the sleeve 4 is fixed with a first nut 5, the first screw 3 rotates and drives the sleeve 4 to move up and down through the first nut 5, and a plurality of roughening units are arranged around the sleeve 4;
the scabbling unit comprises a shell 6, the shell 6 is positioned outside a sleeve 4, a sliding rod 7 vertically penetrates through the shell 6, the upper end of the sliding rod 7 is fixed with a top plate 2, the lower end of the sliding rod 7 is fixed with a bottom plate 1, the upper side and the lower side of the shell 6 are respectively provided with a small chain wheel 8 capable of rotating, the two small chain wheels 8 are in chain transmission, a rolling chain wheel 9 meshed with a chain is arranged in the shell 6, the central shaft of the rolling chain wheel 9 penetrates through the shell 6 and is rotatably connected with the sleeve 4, the outer side of the shell 6 is provided with a rectangular box 10 with an outward opening, a second reciprocating lead screw structure arranged along the length direction of the rectangular box 10 is arranged in the rectangular box 10, a worm wheel drives a second lead screw 11 to rotate through a gear set, a guide rod 12 parallel to the second lead screw 11 is arranged in the rectangular box 10, a sliding block 13 capable of sliding is arranged on the guide rod 12, a second nut 14 is fixed with the sliding block 13, and a scabbling disk 15 is arranged outside the sliding block 13;
a flat plate 16 is fixed on one side, close to the rectangular box 10, of the shell 6, a rubber disc 17 is arranged on the rectangular box 10, a compression screw penetrates through the flat plate 16, and the rectangular box 10 and the shell 6 can be fixed together by screwing the compression screw.
The upper end of the first lead screw 3 is connected with a first motor 18, and the first motor 18 is fixed on the top plate 2.
In order to install the small chain wheel 8, vertical plates 19 are arranged on the bottom plate 1 and the top plate 2, and the small chain wheel 8 is rotationally fixed on the vertical plates 19.
In order to adjust the roughening roughness, a first bevel gear 20 is coaxially fixed on the small chain wheel 8 on the upper side, a plurality of second bevel gears 21 corresponding to the first bevel gears 20 in a one-to-one manner are rotatably connected on the top plate 2, the first bevel gears 20 are meshed with the second bevel gears 21, a transmission chain wheel 22 is coaxially fixed at the upper end of each second bevel gear, the plurality of transmission chain wheels 22 are connected together through a chain, one of the transmission chain wheels 22 is connected with a second motor 23, and the second motor 23 is fixed on the top plate 2.
In order to realize that the worm wheel can drive the second lead screw 11 to rotate, the gear set comprises a large gear 24, the large gear 24 and the rolling chain wheel 9 are coaxially fixed together, a small gear 25 is rotatably connected in the rectangular box 10, a large bevel gear is coaxially fixed on the small gear 25, a small bevel gear is fixed on the second lead screw 11, and the large bevel gear is meshed with the small bevel gear.
In order to stand in the middle of the centre of rectangular hole at chisel hair in-process this device, bottom plate 1 lower extreme run through and to have can pivoted round pin axle 26, round pin axle 26 lower extreme articulates there is movable rod 27, connect through the pressure spring between two adjacent movable rods 27 for movable rod 27 lower extreme outside skew, movable rod 27 lower extreme cover is equipped with drum 28, movable rod 27 cartridge is in drum 28, is connected with the pressure spring between drum 28 bottom and the movable rod 27 lower extreme.
In order to install the burr-chiseling disk 15, a horizontal screw rod is fixed on the sliding block 13, a threaded pipe corresponding to the screw rod is fixed on the burr-chiseling disk 15, the screw rod is in threaded connection with the threaded pipe, a plurality of screws are welded on the burr-chiseling disk 15, a plurality of conical blocks are arranged on the screws, and the conical blocks are in threaded connection with the screws.
It should be noted that a bearing is installed between the pin shaft 26 and the bottom plate 1, a bearing is connected between the pinion 25 and the rectangular box 10, a bearing is installed between the second lead screw 11 and the rectangular box 10, and a bearing is installed between the central shaft of the rolling sprocket 9 and the housing 6.
The invention can chisel the four walls of the rectangular hole and three vertical surfaces of the drainage channel, and of course, if necessary, corresponding chisel units can be arranged according to the hole type requirement, for example, for the chisel of the pentagonal hole, only five chisel units in the scheme are needed. For convenience of explanation, the use process is described in detail by taking a roughened rectangular hole as an example.
When the device is used, the device is placed in a hole, the inclination degree of the rectangular box 10 is set according to the width of the side wall of the hole (as shown in fig. 8), a compression screw is screwed to fix the rectangular box 10 and the shell 6 together, at the moment, the first motor 18 is electrified to drive the first lead screw 3 to rotate, the first lead screw 3 rotates to drive the sleeve 4 to move up and down through the first nut 5, the plurality of shells 6 are driven to move down simultaneously in the up-and-down moving process of the sleeve 4, the shell 6 moves down to drive the rolling chain wheel 9 to move down, the rolling chain wheel 9 can roll along a chain, the rolling chain wheel 9 drives the second lead screw 11 to rotate through the gear set, the second lead screw 11 rotates to drive the hair-chiseling disc 15 to reciprocate along the rectangular box 10 through the second nut 14, and in the chiseling process, the plurality of conical blocks on the hair-chiseling disc 15 chiseling the hole wall.
In the process, the track of a single conical block advances in a Z shape, and in the reciprocating process, a plurality of burrs are formed on the hole wall to form prismatic burr tracks which are uniformly distributed.
When the density of a chiseling track needs to be adjusted, the first motor 18 and the second motor 23 are started simultaneously, the second motor 23 is a servo motor and can preferably control forward and reverse rotation and set rotating speed, when the sleeve 4 moves up and down due to rotation of the first motor 18, the rotating speed of the rolling chain wheel 9 can be increased or decreased due to rotation of the second motor 23, the rotating speed of the second lead screw 11 is controlled, the left and right moving frequency of the chiseling disc 15 is further controlled, and finally the chiseling roughness is controlled.
According to the invention, the width of the scabbling area can be controlled by rotating the angle of the rectangular box 10, so that the device can also be used for performing local scabbling on a wall surface or scabbling on a local area in the same side wall in a rectangular hole, and the device has special significance for later local maintenance of a building.
When the device is used for roughening the drainage channel, the device is transversely placed in the drainage channel, except that the roughening discs 15 at the upper end are in no load, the other three roughening discs 15 simultaneously roughen three inner surfaces of the drainage channel respectively, and the base body of the drainage channel cannot be damaged.
The burr disk 15 of the present invention may be in a variety of forms, such as a disk, rectangle, prism, or other shapes, as long as it can reach and fit the corners of the hole.
The invention is also suitable for chiseling corners where three walls meet in a building, and compared with the traditional manual chiseling, the invention can chisel dead corners and the chiseling track is uniform and reliable.
The water drainage channel is ingenious in structure, can be well suitable for rectangular hole scabbling, can be used for uniformly scabbling the inner wall of the water drainage channel, can be used for effectively scabbling the inner sides of inner corners and dead corners, can also be used for locally scabbling the inner sides of the inner corners and the dead corners, meets production requirements, is uniform in scabbling force, reduces labor force, saves time and labor, and is high in adaptability.
Claims (7)
1. The utility model provides a building rectangular hole lateral wall chisel hair device, characterized in that, including horizontal bottom plate (1), there is horizontal roof (2) bottom plate (1) top, there is vertical and can the pivoted first reciprocal lead screw structure between bottom plate (1) and roof (2), wherein first lead screw (3) upper end is connected with roof (2) rotation, the cover is equipped with sleeve (4) on first lead screw (3), sleeve (4) are together fixed with first nut (5), first lead screw (3) rotate and drive sleeve (4) through first nut (5) and reciprocate, sleeve (4) have a plurality of chisel hair units all around;
the chiseling unit comprises a shell (6), the shell (6) is positioned on the outer side of a sleeve (4), a sliding rod (7) vertically penetrates through the shell (6), the upper end of the sliding rod (7) is fixed with a top plate (2), the lower end of the sliding rod (7) is fixed with a bottom plate (1), small chain wheels (8) capable of rotating are arranged on the upper side and the lower side of the shell (6), the two small chain wheels (8) are in chain transmission, a rolling chain wheel (9) meshed with a chain is arranged in the shell (6), a central shaft of the rolling chain wheel (9) penetrates through the shell (6) and is rotatably connected with the sleeve (4), a rectangular box (10) with an outward opening is arranged on the outer side of the shell (6), a second reciprocating lead screw structure arranged in the length direction of the rectangular box (10), a worm wheel drives a second lead screw (11) to rotate through a gear set, a guide rod (12) parallel to the second lead screw (11) is arranged in the rectangular box (10), a sliding block (13) is arranged on the guide rod (12), a second nut (14) is fixed with the sliding block (13), and a burr-chiseling disc (15) is arranged on the outer side of the sliding block (13);
one side of the shell (6) close to the rectangular box (10) is fixed with a flat plate (16), the rectangular box (10) is provided with a rubber disc (17), a compression screw penetrates through the flat plate (16), and the rectangular box (10) and the shell (6) can be fixed together by screwing the compression screw.
2. The building rectangular hole side wall roughening device according to claim 2, wherein a first motor (8) is connected to an upper end of the first lead screw (3), and the first motor (8) is fixed on the top plate (2).
3. The device for chiseling the side wall of the rectangular hole in the building as claimed in claim 3, wherein the bottom plate (1) and the top plate (2) are both provided with vertical plates (19), and the small chain wheel (8) is rotatably fixed on the vertical plates (19).
4. The building rectangular hole side wall hair-making device according to claim 1, characterized in that a first bevel gear (20) is coaxially fixed on the small chain wheel (8) at the upper side, a plurality of second bevel gears (21) corresponding to the first bevel gears (20) in a one-to-one manner are rotatably connected on the top plate (2), the first bevel gears (20) are meshed with the second bevel gears (21), a transmission chain wheel (22) is coaxially fixed at the upper end of each second bevel gear, the plurality of transmission chain wheels (22) are connected together through a chain, wherein one transmission chain wheel (22) is connected with a second motor (23), and the second motor (23) is fixed on the top plate (2).
5. The device for roughening the side wall of a rectangular hole in a building according to claim 1, wherein the gear set comprises a large gear (24), the large gear (24) and a rolling chain wheel (9) are coaxially fixed together, a small gear (25) is rotatably connected in the rectangular box (10), a large bevel gear is coaxially fixed on the small gear (25), a small bevel gear is fixed on the second lead screw (11), and the large bevel gear and the small bevel gear are meshed with each other.
6. The building rectangular hole side wall roughening device according to claim 1, wherein a rotatable pin shaft (26) penetrates through the lower end of the bottom plate (1), a movable rod (27) is hinged to the lower end of the pin shaft (26), two adjacent movable rods (27) are connected through a pressure spring, so that the lower ends of the movable rods (27) deflect outwards, a cylinder (28) is sleeved on the lower end of each movable rod (27), the movable rods (27) are inserted into the cylinder (28), and the pressure spring is connected between the bottom of the cylinder (28) and the lower end of each movable rod (27).
7. The building rectangular hole side wall chiseling device as claimed in claim 1, wherein a horizontal screw rod is fixed on the sliding block (13), a threaded pipe corresponding to the screw rod is fixed on the chiseling disk (15), the screw rod and the threaded pipe are in threaded connection, a plurality of screws are welded on the chiseling disk (15), a plurality of conical blocks are arranged on the screws, and the conical blocks and the screws are in threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111008056.8A CN113650179A (en) | 2021-08-31 | 2021-08-31 | Building rectangular hole lateral wall chisel hair device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111008056.8A CN113650179A (en) | 2021-08-31 | 2021-08-31 | Building rectangular hole lateral wall chisel hair device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113650179A true CN113650179A (en) | 2021-11-16 |
Family
ID=78482434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111008056.8A Withdrawn CN113650179A (en) | 2021-08-31 | 2021-08-31 | Building rectangular hole lateral wall chisel hair device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113650179A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412223A (en) * | 2022-01-29 | 2022-04-29 | 常宏望 | Filling and tamping device for long and thin holes of wall |
-
2021
- 2021-08-31 CN CN202111008056.8A patent/CN113650179A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412223A (en) * | 2022-01-29 | 2022-04-29 | 常宏望 | Filling and tamping device for long and thin holes of wall |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113650179A (en) | Building rectangular hole lateral wall chisel hair device | |
| US20100193247A1 (en) | Track and Sprocket Drive for Drilling | |
| CN112177643B (en) | Mining cylinder type anchor cable auxiliary installation equipment | |
| CN113503033A (en) | Building square hole chiseling device | |
| CN206614693U (en) | A kind of drilling equipment for building block | |
| CN215393880U (en) | Plate perforating device for building engineering convenient to fixed panel | |
| CN208056016U (en) | Hydraulic engineering ice-breaking formula sluice | |
| CN113524470A (en) | Building square hole inner wall chisel hair device | |
| CN218206614U (en) | Reversible three-edged drill rod | |
| CN206748023U (en) | A kind of board drilling machine | |
| CN205688434U (en) | A kind of many wings shaped pile roll forming device | |
| CN213061998U (en) | Anchor rod construction device for constructional engineering | |
| CN209724217U (en) | A kind of height-adjustable rotary drilling rig | |
| CN105887810B (en) | A kind of more wing shaped pile roll forming devices and construction method | |
| CN2681878Y (en) | Extrusion forming machine for concrete profiled hole prefabricated panel | |
| CN213195862U (en) | Steel construction cutting device with regulatory function | |
| CN205012388U (en) | Cleaning device for sludge in fishpond | |
| CN210826979U (en) | Emergent ware of filling in pit of town road | |
| CN112627050A (en) | Box girder template for municipal administration road and bridge construction | |
| CN219531899U (en) | Floor thickness detector for supervision building engineering | |
| CN220789266U (en) | Bilateral slag scraping machine | |
| CN112123565A (en) | Can prevent reinforcing bar positioner is used in production of concrete prefabricated component of aversion | |
| CN210141109U (en) | Civil engineering construction is with drilling coring device | |
| CN220704413U (en) | Ground leveling device suitable for land remediation | |
| CN213274933U (en) | Conveniently get road of material and detect with boring core machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20211116 |
|
| WW01 | Invention patent application withdrawn after publication |