CN110589440A - Part recovery system for automobile repair and assembly - Google Patents
Part recovery system for automobile repair and assembly Download PDFInfo
- Publication number
- CN110589440A CN110589440A CN201910878795.9A CN201910878795A CN110589440A CN 110589440 A CN110589440 A CN 110589440A CN 201910878795 A CN201910878795 A CN 201910878795A CN 110589440 A CN110589440 A CN 110589440A
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- Prior art keywords
- lever
- scraper
- baffle
- along
- groove
- 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.)
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- 230000008439 repair process Effects 0.000 title claims abstract description 18
- 238000011084 recovery Methods 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/34—Devices for discharging articles or materials from conveyor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a part recovery system for automobile repair and assembly, which comprises a lever, a rack, a wheel disc and a scraper; the lever is provided with a rotating center in a matching way; the rotation center freely moves along the length direction of the lever to adjust the position; one end of the lever is matched with the power device, and the other end of the lever is in contact with the rack; the power device drives the corresponding end of the lever to rotate, and drives one end of the lever, which is far away from the power device, to synchronously rotate; the edge of the wheel disc is in transmission fit with the rack; the scraper is arranged on the wheel disc and synchronously rotates along with the wheel disc; through the position of removal rotation center, just can realize the adjustment of scraper blade swing range to realize multiple effect: when the swing range of the scraper is small, parts on the table top can be gathered to the edge, and the space of the table top can be rapidly vacated; when the swing range of scraper blade is great, when corresponding the collecting plate, can sweep the part on the collecting plate, further retrieve the part with the help of the distributing trough.
Description
Technical Field
The invention relates to the field of test equipment, in particular to a part recovery system for automobile repair and assembly.
Background
In the steam repair process, each part is frequently required to be disassembled and partially replaced, more parts are arranged on a workbench, the sizes of the parts are different, redundant parts and accumulated tiny dust and the like are arranged after the parts are installed and maintained, the parts are manually arranged and the workbench is cleaned, and more time is required. Therefore, it is necessary to provide a parts recycling system for automobile repair and assembly, which can rapidly collect and collect the assembled parts.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a part recovery system for automobile repair and assembly, which can quickly summarize and collect assembly parts.
The technical scheme is as follows: in order to achieve the above purpose, the part recovery system for automobile repair and assembly comprises a lever, a rack, a wheel disc and a scraper; the lever is provided with a rotating center in a matching way; the rotation center freely moves along the length direction of the lever to adjust the position; one end of the lever is matched with the power device, and the other end of the lever is in contact with the rack; the power device drives the corresponding end of the lever to rotate, and drives one end of the lever, which is far away from the power device, to synchronously rotate; the rack slides along the length direction of the rack under the driving of the corresponding end of the lever; the edge of the wheel disc is in transmission fit with the rack; the scraper is arranged on the wheel disc and synchronously rotates along with the wheel disc; the swing range of the scraper corresponds to the table surface of the workbench.
Furthermore, one end of the rack, which is far away from the corresponding end of the lever, is connected with an elastic piece.
Further, the power device comprises a motor, a worm, an eccentric wheel and a transmission wheel; the power output end of the motor is connected with the worm rotating shaft in a matching way; the worm is matched with the transmission wheel to drive the transmission wheel to rotate; the eccentric wheel is coaxially arranged on the surface of the transmission wheel.
Further, a brush is arranged at the bottom of the scraper; the tip of the brush is attached to the surface of the workbench; an air duct is arranged in the scraper along the length direction; one end of the air duct, which is far away from the workbench, is communicated with a fan; the bottom of the scraper is also provided with a suction inlet; the suction inlet is communicated with the air duct.
Further, the bottom of the scraper is provided with a groove; the suction inlet is arranged at the bottom of the groove; the hairbrush is arranged around the groove; a material collecting box is embedded in the groove; the material collecting box comprises a box body and an air column; the box body is an open container, and an inner cavity is formed in the box body; the opening of the inner cavity faces the bottom of the scraper; the air column is communicated with and arranged on the bottom surface of the box body; the air column is correspondingly embedded into the suction port to communicate the air channel with the inner cavity; the scraper comprises a plate body and a fixed table; the fixed table is connected and arranged on the wheel disc; the corresponding end of the plate body is in rotating fit with the fixed table; the rotating shaft of the plate body is parallel to the length direction of the plate body.
Furthermore, an adjusting cavity is arranged inside the box body; the adjusting cavity is arranged between the gas column and the inner cavity; a baffle is arranged in the adjusting cavity; the length direction of the baffle is the same as the arrangement direction of the air columns; a plurality of through holes are formed in the baffle along the length direction; the through hole corresponds to the position of the gas column; the baffle is attached to the inner wall of the air column communicated with the adjusting cavity; the baffle plate moves back and forth along the length direction of the baffle plate, and the size of the overlapped part of the through hole and the air column is adjusted; the side surface of the baffle is provided with an extension piece; a strip-shaped hole is formed in the adjusting cavity; the extension piece passes through the bar hole and reaches the outside of adjusting the chamber.
Furthermore, a positioning groove is formed in the outer side of the box body; the strip-shaped holes are correspondingly arranged on the bottom surface of the positioning groove; the bottom surface of the positioning groove is also provided with a first positioning hole; the first positioning holes are distributed around the strip-shaped holes along the moving direction of the baffle; the tip of the extension piece extends out of the strip-shaped hole and is positioned in the positioning groove; an end cover is embedded in the positioning groove; one side of the end cover facing the bottom surface of the positioning groove is provided with a limiting groove; the limiting groove is correspondingly nested and matched with the extending piece; the end cover slides in the positioning groove in a reciprocating manner to drive the baffle to move synchronously; the end cover is provided with a second positioning hole along the thickness direction of the positioning groove; the second positioning holes are arranged corresponding to the first positioning holes in position; and pins are embedded in the first positioning hole and the second positioning hole.
Furthermore, a collecting plate is connected with one side of the workbench along the swinging direction of the scraper; a material distributing groove is formed in the upper surface of the collecting plate; the distributing grooves are distributed at intervals along the swinging path of the scraper; and the width of the material distributing grooves is gradually increased along the direction far away from the workbench.
Has the advantages that: the invention relates to a part recovery system for automobile repair and assembly, which comprises a lever, a rack, a wheel disc and a scraper; the lever is provided with a rotating center in a matching way; the rotation center freely moves along the length direction of the lever to adjust the position; one end of the lever is matched with the power device, and the other end of the lever is in contact with the rack; the power device drives the corresponding end of the lever to rotate, and drives one end of the lever, which is far away from the power device, to synchronously rotate; the rack slides along the length direction of the rack under the driving of the corresponding end of the lever; the edge of the wheel disc is in transmission fit with the rack; the scraper is arranged on the wheel disc and synchronously rotates along with the wheel disc; the swing range of the scraper corresponds to the table top of the workbench; through the position of removal rotation center, just can realize the adjustment of scraper blade swing range fast under the prerequisite that does not change other subassemblies to realize multiple effect: when the swing range of the scraper is small, parts on the table top can be gathered to the edge, and the space of the table top can be rapidly vacated; when the swing range of scraper blade is great, when corresponding the collecting plate, can sweep the part on the collecting plate, further retrieve the part with the help of the distributing trough.
Drawings
FIG. 1 is a schematic view of the overall structure of a recovery system;
FIG. 2 is a schematic view of a squeegee configuration;
FIG. 3 is a detail view of a squeegee;
FIG. 4 is a schematic diagram of the internal structure of the adjustment chamber;
fig. 5 is a schematic view of a baffle positioning structure.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The part recovery system for automobile repair and assembly is shown in figure 1 and comprises a lever 4, a rack 5, a wheel disc 13 and a scraper 9; the lever 4 is provided with a rotating center 41 in a matching way; the rotating center 41 freely moves along the length direction of the lever 4 to adjust the position; one end of the lever 4 is matched with the power device, and the other end of the lever is in contact with the rack 5; the power device drives the corresponding end of the lever 4 to rotate, and drives one end of the lever 4 far away from the power device to synchronously rotate; the edge of the wheel disc 13 is in transmission fit with the rack 5; the rack 5 slides along the length direction of the rack under the driving of the corresponding end of the lever 4, and further drives the wheel disc 13 to rotate; the scraper 9 is arranged on the wheel disc 13 and synchronously rotates along with the wheel disc 13; the swing range of the scraper 9 corresponds to the table top of the workbench 8; a collecting plate 7 is connected with one side of the workbench 8 along the swinging direction of the scraper 9; a material distributing groove 71 is formed in the upper surface of the collecting plate 7; the distributing grooves 71 are distributed at intervals along the swinging path of the scraper 9; a plurality of divide silo 71 along the direction of keeping away from workstation 8, the width crescent, the less part of size will be transferred in the inslot when the branch silo 71 that corresponds, and the great part of size then can cross present branch silo 71 under the promotion of scraper blade 9, continues to move towards the bigger branch silo department of width, realizes the classification of different size parts.
Through the position of removal center of rotation 41, just can realize the adjustment of scraper blade 9 swing range fast under the prerequisite that does not change other subassemblies to realize multiple effect: when the swing range of the scraper plate 9 is small, parts on the table top can be gathered to the edge, and the space of the table top can be rapidly vacated; when the swing range of the scraper 9 is large and corresponds to the collecting plate 7, the parts can be swept onto the collecting plate 7, and the parts can be further recycled by the distributing groove 71.
One end of the rack 5, which is far away from the corresponding end of the lever 4, is connected with an elastic part 12, and the initial state of the rack 5 is shown as part (a) in the attached figure 1; part (b) of the attached figure 1 shows a state that after the power device drives the lever 4 to rotate, the rack 5 moves and compresses the elastic part 12, at this time, the scraper 9 synchronously swings to push the parts on the surface of the workbench 8 away from the set, and then, the power device continues to operate, the elastic part 12 stretches again, and the scraper 9 returns to the initial position; in addition, the initial position and the line concentration position that the scraper blade 9 moved are provided with first stopper 10 and second stopper 6 respectively for restrict the motion state of each part, avoid appearing that the elastic component 12 is tensile, the compression excessively arouses the damage scheduling problem.
The power device comprises a motor 1, a worm 2, an eccentric wheel 3 and a transmission wheel 31; the power output end of the motor 1 is connected with the rotating shaft of the worm 2 in a matching way; the worm 2 is matched with the transmission wheel 31 to drive the transmission wheel to rotate; the eccentric wheel 3 is coaxially arranged on the surface of the transmission wheel 31; the worm 2 rotates by the power provided by the motor 1, so that the driving wheel 31 is driven to rotate synchronously; the eccentric wheel 3 is also driven by the driving wheel 31 to rotate, so that the lever 4 is periodically extruded and rotated, and the periodic rotation of the lever 4 can be realized by matching with the elastic part 12 at the other end of the lever 4.
As shown in fig. 2 and fig. 3, a brush 91 is arranged at the bottom of the scraper 9; the tip of the brush 91 is attached to the surface of the workbench 8 and used for cleaning dust on the surface of the table board, and meanwhile, compared with a mode that the whole end face is attached to the workbench, friction force can be remarkably reduced by pushing a part through the brush 91, so that the scraper blade 9 can run more smoothly; an air duct 92 is arranged in the scraper 9 along the length direction; a fan 93 is communicated with one end of the air duct 92, which is far away from the workbench 8; the bottom of the scraper 9 is also provided with a suction inlet 94; the suction inlet 94 is communicated with the air duct 92; when the brush 91 cleans dust on the table top, the dust can enter the air duct 92 from the suction opening 94 in real time, so as to realize the dust collection function.
The bottom of the scraper 9 is provided with a groove 99; the suction inlet 94 is arranged at the bottom of the groove 99; the brush 91 is arranged around the groove 99; a material collecting box 98 is embedded in the groove 99; the material collecting box 98 comprises a box body 981 and an air column 982; the box body 981 is an open container, and an inner cavity 983 is formed in the box body; the opening of the inner cavity 983 faces the bottom of the scraper 9; the air column 982 is communicated with and arranged on the bottom surface of the box body 981; the air column 982 is correspondingly embedded into the suction port 94, and the air duct 92 is communicated with the inner space of the box body 981; the scraper 9 comprises a plate body 901 and a fixed platform 902; the fixed platform 902 is connected with the wheel disc 13; the corresponding end of the plate body 901 is rotatably matched with the fixed table 902; the rotating shaft of the plate body 902 is parallel to the length direction thereof; when parts with extremely small sizes exist on the workbench, the distribution density of the brush 91 is required to be high by pushing the brush 91, and the parts with small sizes can be adsorbed at the opening of the air column 982 in the box body 981 by properly increasing the suction force of the suction port 94; when the scraper 9 swings once and the classification of other parts with larger sizes is finished, the plate body 901 is partially turned over by 180 degrees, and the opening of the box body 981 is upward; the blower 93 is turned off, the box body 981 is taken down, and the small-size parts adsorbed by the air column 982 are all accommodated in the box body 981 at the moment; in practical use, a plurality of sets of box bodies 981 with different specifications can be designed according to the size requirement of the part, so that the air columns 982 with different apertures are used for matching with the size of the part.
The method for adapting to different sizes of parts by directly replacing the box body 981 has the advantages that the structure of the box body 981 is simpler, so that the replacement cost is not high; in addition, another scheme for dynamically adjusting the size of the air inlet opening by using a single box body 981 is provided; as shown in fig. 4, an adjusting cavity 901 is arranged inside the box body 981; the adjusting cavity 901 is arranged between the air column 982 and the inner cavity 983; a baffle 902 is arranged in the adjusting cavity 901; the length direction of the baffle 902 is the same as the arrangement direction of the air columns 982; a plurality of through holes 903 are formed in the baffle 902 along the length direction; the through hole 903 corresponds to the air column 982 in position; the baffle 902 is jointed with the inner wall of the air column 982 communicated with the adjusting cavity 901; the baffle 902 moves back and forth along the length direction of the baffle, and the size of the overlapped part of the through hole 903 and the air column 982 is adjusted, so that the actual size of the air inlet of the air column 982 is realized, and the condition that the part is directly sucked into the air channel when the air inlet is larger than the part to be adsorbed is avoided; the side surface of the baffle 902 is provided with an extension piece 904, and the purpose of controlling the baffle 902 can be achieved by pulling the extension piece 904; a strip-shaped hole 905 is formed in the adjusting cavity 901; the extension 904 passes through the strip-shaped hole 905 and reaches the outside of the adjusting cavity 901; a roller 911 is arranged on one side of the baffle 902, which is back to the air column 982, and is used for supporting the weight of the baffle 902, and meanwhile, the rolling fit is smoother than the sliding fit between two planes; the space below the roller 911 is shown as the chamber 983.
As shown in fig. 5, a positioning groove 906 is formed on the outer side of the box body 981; the strip-shaped holes 905 are correspondingly arranged on the bottom surface of the positioning groove 906; the bottom surface of the positioning groove 906 is also provided with a first positioning hole 907; the first positioning holes 907 are distributed around the strip-shaped holes 905 along the moving direction of the baffle 902; the tip of the extension piece 904 extends out of the strip-shaped hole and is positioned in the positioning groove 906; an end cover 908 is embedded in the positioning groove 906; one side of the end cover 908 facing the bottom surface of the positioning slot 906 is provided with a limiting slot 909; the limiting groove 909 is correspondingly nested and matched with the extending piece 904; the end cover 908 slides in the positioning groove 906 in a reciprocating manner to drive the baffle 902 to move synchronously, so that the problem that the extending piece is not easy to grasp is solved, and the position change of the baffle is realized by pressing and pushing the end cover 908; the end cover 908 is provided with a second positioning hole 910 along the thickness direction of the positioning groove 906; a plurality of second positioning holes 910 are arranged corresponding to the first positioning holes 907; pins are embedded in the first positioning hole 907 and the second positioning hole 910, and counter bores are formed in the surface of the second positioning hole 910, so that the pins can be conveniently pulled out again; the detents 906 function to keep the end cap and its detent structure within the general contour of the cartridge body 981 without interfering with the mating of the cartridge body 981 with the groove 99.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. A part recovery system for automobile repair, assembly characterized in that: comprises a lever (4), a rack (5), a wheel disc (13) and a scraper (9); a rotating center (41) is arranged on the lever (4) in a matching way; the rotating center (41) freely moves along the length direction of the lever (4) to adjust the position; one end of the lever (4) is matched with the power device, and the other end of the lever is in contact with the rack (5); the power device drives the corresponding end of the lever (4) to rotate, and drives one end, far away from the power device, of the lever (4) to synchronously rotate; the rack (5) slides along the length direction of the rack under the driving of the corresponding end of the lever (4); the edge of the wheel disc (13) is in transmission fit with the rack (5); the scraper (9) is arranged on the wheel disc (13) and synchronously rotates along with the wheel disc (13); the swing range of the scraper (9) corresponds to the table surface of the workbench (8).
2. The parts recycling system for automobile repair, assembly according to claim 1, wherein: and one end of the rack (5) far away from the corresponding end of the lever (4) is connected with an elastic piece (12).
3. The parts recycling system for automobile repair, assembly according to claim 2, wherein: the power device comprises a motor (1), a worm (2), an eccentric wheel (3) and a transmission wheel (31); the power output end of the motor (1) is connected with the rotating shaft of the worm (2) in a matching way; the worm (2) is matched with the transmission wheel (31) to drive the transmission wheel to rotate; the eccentric wheel (3) is coaxially arranged on the surface of the transmission wheel (31).
4. The parts recycling system for automobile repair, assembly according to claim 1, wherein: the bottom of the scraper (9) is provided with a brush (91); the tip of the brush (91) is attached to the surface of the workbench (8); an air duct (92) is arranged in the scraper (9) along the length direction; one end of the air duct (92) far away from the workbench (8) is communicated with a fan (93); the bottom of the scraper (9) is also provided with a suction inlet (94); the suction inlet (94) is communicated with the air duct (92).
5. The parts recycling system for automobile repair, assembly according to claim 4, wherein: the bottom of the scraper (9) is provided with a groove (99); the suction inlet (94) is arranged at the bottom of the groove (99); the hairbrush (91) is arranged around the groove (99); a material collecting box (98) is embedded in the groove (99); the material collecting box (98) comprises a box body (981) and an air column (982); the box body (981) is an open container, and an inner cavity (983) is arranged in the box body; the opening of the inner cavity (983) faces the bottom of the scraper (9); the air column (982) is communicated with and arranged on the bottom surface of the box body (981); the air column (982) is correspondingly embedded into the suction inlet (94) to communicate the air duct (92) with the inner cavity (983); the scraper (9) comprises a plate body (901) and a fixed platform (902); the fixed table (902) is connected and arranged on the wheel disc (13); the corresponding end of the plate body (901) is in rotating fit with the fixed table (902); the rotating shaft of the plate body (902) is parallel to the length direction of the plate body.
6. The parts recycling system for automobile repair, assembly according to claim 5, wherein: an adjusting cavity (901) is arranged in the box body (981); the adjusting cavity (901) is arranged between the air column (982) and the inner cavity (983); a baffle plate (902) is arranged in the adjusting cavity (901); the length direction of the baffle (902) is the same as the arrangement direction of the air columns (982); a plurality of through holes (903) are formed in the baffle (902) along the length direction; the through hole (903) corresponds to the air column (982); the baffle (902) is attached to the inner wall of an air column (982) communicated with the adjusting cavity (901); the baffle (902) moves back and forth along the length direction of the baffle, and the size of the overlapped part of the through hole (903) and the air column (982) is adjusted; an extension piece (904) is arranged on the side surface of the baffle (902); a strip-shaped hole (905) is formed in the adjusting cavity (901); the extension (904) passes through the strip-shaped hole (905) to reach the outside of the adjustment cavity (901).
7. The parts recycling system for automobile repair, assembly according to claim 6, wherein: a positioning groove (906) is formed in the outer side of the box body (981); the strip-shaped holes (905) are correspondingly arranged on the bottom surface of the positioning groove (906); the bottom surface of the positioning groove (906) is also provided with a first positioning hole (907); the first positioning holes (907) are distributed around the strip-shaped holes (905) along the moving direction of the baffle (902); the tip of the extension piece (904) extends out of the strip-shaped hole and is positioned in the positioning groove (906); an end cover (908) is embedded in the positioning groove (906); one side of the end cover (908) facing the bottom surface of the positioning groove (906) is provided with a limiting groove (909); the limiting groove (909) is correspondingly nested and matched with the extending piece (904); the end cover (908) slides in the positioning groove (906) in a reciprocating manner to drive the baffle (902) to move synchronously; the end cover (908) is provided with a second positioning hole (910) along the thickness direction of the positioning groove (906); the positions of the second positioning holes (910) and the first positioning holes (907) are correspondingly arranged; pins are embedded in the first positioning hole (907) and the second positioning hole (910).
8. The parts recycling system for automobile repair, assembly according to claim 1, wherein: a collecting plate (7) is connected with one side of the workbench (8) along the swinging direction of the scraper (9); a material distributing groove (71) is formed in the upper surface of the collecting plate (7); the distributing grooves (71) are distributed at intervals along the swinging path of the scraper (9); the width of the material distributing grooves (71) is gradually increased along the direction far away from the workbench (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910878795.9A CN110589440A (en) | 2019-09-18 | 2019-09-18 | Part recovery system for automobile repair and assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910878795.9A CN110589440A (en) | 2019-09-18 | 2019-09-18 | Part recovery system for automobile repair and assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110589440A true CN110589440A (en) | 2019-12-20 |
Family
ID=68860484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910878795.9A Withdrawn CN110589440A (en) | 2019-09-18 | 2019-09-18 | Part recovery system for automobile repair and assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110589440A (en) |
-
2019
- 2019-09-18 CN CN201910878795.9A patent/CN110589440A/en not_active Withdrawn
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| 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191220 |