CN112044735A - Agricultural coarse grain vibration screening device - Google Patents
Agricultural coarse grain vibration screening device Download PDFInfo
- Publication number
- CN112044735A CN112044735A CN202010779295.2A CN202010779295A CN112044735A CN 112044735 A CN112044735 A CN 112044735A CN 202010779295 A CN202010779295 A CN 202010779295A CN 112044735 A CN112044735 A CN 112044735A
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- Prior art keywords
- bearing seat
- transmission shaft
- workbench
- box body
- close
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- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention relates to the field of agricultural equipment, in particular to an agricultural coarse grain vibration screening device. Provides an agricultural coarse grain vibration screening device with automatic screening and simple operation. An agricultural coarse grain vibration screening device comprises: the base is provided with a support column; the workbench is arranged on the support column; the screening mechanism is arranged on the workbench; the blanking mechanism is arranged on one side of the upper part of the screening mechanism. The invention achieves the effects of automatic screening and simple operation.
Description
Technical Field
The invention relates to the field of agricultural equipment, in particular to an agricultural coarse grain vibration screening device.
Background
Coarse food grains are very coarse food grains and contain a lot of impurities. No fine selection was performed. Coarse food grains are the raw materials for deep processing. In general, it takes a lot of time for the agricultural name to fine select the coarse grains. Nowadays, the peasant generally screens the coarse grain and can use the sieve manual to screen the coarse grain, and at present, there is the continuous vibrations sieve of peasant that needs to screen, the big problem of the amount of labour of artifical screening coarse grain.
Therefore, the agricultural coarse grain vibration screening device which is capable of automatically screening and simple in operation needs to be researched and developed to solve the problems.
Disclosure of Invention
In order to overcome the defects that the farmers need to continuously vibrate the sieve to screen coarse grains and the labor capacity is large, the technical problem to be solved is that: provides an agricultural coarse grain vibration screening device with automatic screening and simple operation.
The technical scheme of the invention is as follows: an agricultural coarse grain vibration screening device comprises: the base is provided with a support column; the workbench is arranged on the support column; the screening mechanism is arranged on the workbench; the blanking mechanism is arranged on one side of the upper part of the screening mechanism.
As a preferable technical scheme of the present invention, the screening mechanism includes: the bracket is symmetrically arranged on the workbench relative to the center line of the workbench; the lower sides of the brackets are symmetrically provided with first connecting rods around the center line of the brackets, and the first connecting rods are movably connected with the brackets; the pad rods are movably arranged between the opposite first connecting rods; the box body is arranged on the pad rod; the fine sieve plate is arranged in the box body; the coarse sieve plate is arranged in the box body and positioned above the fine sieve plate; the fan-shaped block is arranged on one side of the bottom of the box body; the first bearing seat is arranged on the workbench close to the fan-shaped block; the first transmission shaft is rotatably arranged in the first bearing seat; the cam is arranged at one end, away from the first bearing seat, of the first transmission shaft; the eccentric position on the other side of the cam is movably provided with a second connecting rod, and the other end of the second connecting rod is movably connected with the fan-shaped block; the middle part of the first transmission shaft is provided with a first circular gear; the second bearing seat is arranged on the workbench close to the first bearing seat; the second transmission shaft is rotatably arranged in the second bearing block; one end of the second transmission shaft, which is close to the cam, is provided with a second circular gear, and the second circular gear is meshed with the first circular gear; the servo motor is arranged on the workbench and close to the second bearing seat, and is connected with the other end of the second transmission shaft through a coupler; the connecting rod is arranged on one side, close to the servo motor, of the support.
As a preferred technical scheme of the invention, the blanking mechanism comprises: the connecting rod of the charging hopper is provided with the charging hopper, and one side of the charging hopper, which is close to the box body, is provided with a notch; the rotating shaft is rotatably arranged on one side of the charging hopper close to the box body, and two ends of the rotating shaft are in rotating fit with the bracket; the middle part of the rotating shaft is provided with a blanking device which is positioned at the gap of the charging hopper; and one end of the rotating shaft, which is close to the second bearing block, is provided with a handle.
As a preferred embodiment of the present invention, the present invention further includes: the third bearing seat is arranged on one side, close to the charging hopper, of the workbench; the third transmission shaft is rotatably arranged in the third bearing seat; the belt transmission device is arranged at one end of the third transmission shaft, which is far away from the handle, and the other end of the belt transmission device is connected with the rotating shaft; the other end of the third transmission shaft is provided with a third circular gear; and one end of the second transmission shaft, which is far away from the cam, is provided with a gear.
As a preferred embodiment of the present invention, the present invention further includes: the bottom of one side of the box body, which is far away from the blanking mechanism, is provided with a bent rod; the other end of the bent rod is provided with a first sliding plate; the side of the box body, which is far away from the blanking mechanism, is provided with a baffle plate; and a second sliding plate is arranged between the baffles.
The invention has the beneficial effects that: the invention achieves the effects of automatic screening and simple operation.
1. The staff starts servo motor, and servo motor passes through the shaft coupling and drives the rotation of second transmission shaft to make the vibration of making a round trip of fine sieve board and coarse sieve board in the box, and then reach the function of carrying out the screening to coarse grain on the sieve. In the process of vibration of the screening mechanism, a worker needs to rotate the handle, so that the blanking device stirs coarse grains in the charging hopper to the coarse sieve plate of the box body from the charging hopper.
2. In the rotating process of the second transmission shaft, the gear lack wheel can be meshed with the third round gear, so that the blanking device rotates to realize intermittent blanking of coarse grains, and the intermittent blanking of the coarse grains in the charging hopper is realized.
3. In order to enable the screened coarse grains to smoothly flow out of the corresponding sieve plate, the high-quality grains flow to one side of the base through the second sliding plate through the opening of the side wall of the box body, and the impurities flow to the other side of the base through the first sliding plate through the opening of the bottom of the box body, so that the high-quality grains and the impurities are conveniently collected.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic view of a first partial body structure according to the present invention.
FIG. 3 is a schematic view of a second partial body structure according to the present invention.
Fig. 4 is a perspective view of a third embodiment of the present invention.
Fig. 5 is a perspective view of a fourth embodiment of the present invention.
Wherein: 1 … base, 2 … supporting column, 3 … workbench, 4 … screening mechanism, 41 … bracket, 42 … first connecting rod, 43 … cushion rod, 44 … box, 45 … fine screen plate, 46 … coarse screen plate, 47 … sector block, 48 … first bearing seat, 49 … first transmission shaft, 410 … cam, 411 … second connecting rod, 412 … first circular gear, 413 … second bearing seat, 414 … second transmission shaft, 415 … second circular gear, 416 … servo motor, 417 … connecting rod, 5 … blanking mechanism, 51 … charging hopper, 52 … rotating shaft, 53 … blanking device, 54 … handle, 6 … third bearing seat, 7 … third transmission shaft, 8 … belt transmission device, 9 … third circular gear, 10 … default gear, 13 … bent rod, 14 first sliding plate, 3615 second sliding plate, 16 … second sliding plate.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-4, an agricultural coarse grain vibration screening device comprises a base 1, a support column 2, a workbench 3, a screening mechanism 4 and a blanking mechanism 5, wherein the support column 2 is arranged on the base 1, the workbench 3 is arranged on the support column 2, the screening mechanism 4 is arranged on the workbench 3, and the blanking mechanism 5 is arranged on the right side of the upper part of the screening mechanism 4.
The screening mechanism 4 comprises a bracket 41, a first connecting rod 42, a cushion rod 43, a box body 44, a fine screen plate 45, a coarse screen plate 46, a sector 47, a first bearing seat 48, a first transmission shaft 49, a cam 410, a second connecting rod 411, a first circular gear 412, a second bearing seat 413, a second transmission shaft 414, a second circular gear 415, a servo motor 416 and a connecting rod 417, wherein the bracket 41 is symmetrically arranged on the front and back of the worktable 3 in front and back of the center line of the worktable 3, the first connecting rods 42 are symmetrically arranged on the left and right of the lower side of the bracket 41 in left and right of the center line of the bracket 41, the first connecting rods 42 are movably connected with the bracket 41, the cushion rod 43 is movably arranged between the first connecting rods 42 opposite to the front and back sides, the box body 44 is arranged on the cushion rod 43, the fine screen plate 45 is arranged in the box body 44, the coarse screen plate 46 is arranged in the box body 44, a first bearing seat 48 is arranged on the workbench 3 near the sector 47, a first transmission shaft 49 is rotatably arranged in the first bearing seat 48, a cam 410 is arranged at the rear end of the first transmission shaft 49, a second connecting rod 411 is movably arranged at the eccentric position of the rear side of the cam 410, the left end of the second connecting rod 411 is movably connected with the sector 47, a first circular gear 412 is arranged in the middle of the first transmission shaft 49, a second bearing seat 413 is arranged on the workbench 3 near the first bearing seat 48, a second transmission shaft 414 is rotatably arranged in the second bearing seat 413, a second circular gear 415 is arranged at the rear end of the second transmission shaft 414, the second circular gear 415 is meshed with the first circular gear 412, a servo motor 416 is arranged on the workbench 3 near the second bearing seat 413, the servo motor 416 is connected with the front end of the second transmission shaft 414 through a coupler, and a connecting rod 417 is arranged between the right sides of the brackets 41.
The blanking mechanism 5 comprises a charging hopper 51, a rotating shaft 52, a blanking device 53 and a handle 54, the charging hopper 51 is arranged on a connecting rod 417, a gap is formed in the left side of the charging hopper 51, the rotating shaft 52 is rotatably arranged on the left side of the charging hopper 51, two ends of the rotating shaft 52 are both in rotating fit with the bracket 41, the blanking device 53 is arranged in the middle of the rotating shaft 52, the blanking device 53 is positioned at the gap of the charging hopper 51, and the handle 54 is arranged at the rear end of the rotating shaft 52.
When the worker needs to use the device, the worker needs to start the servo motor 416, and then put the coarse grains to be screened into the charging hopper 51, the servo motor 416 drives the second transmission shaft 414 to rotate through the coupler, so that the second circular gear 415 rotates, thereby rotating the first circular gear 412, and consequently rotating the first transmission shaft 49, and consequently rotating the cam 410, the cam 410 rotates and drives the second connecting rod 411 to swing, and consequently the sector 47 swings, thereby leading the box body 44 to swing back and forth on the cushion rod 43 through the first connecting rod 42 around the movable connection part of the first connecting rod 42 and the bracket 41, leading the fine sieve plate 45 and the coarse sieve plate 46 in the box body 44 to vibrate back and forth, further, the coarse grains on the sieve plate are screened, and finally, the high-quality grains screened by the coarse sieve plate 46 flow out from the opening on the side wall of the box body 44, and the impurities screened by the fine sieve plate 45 flow out from the opening at the bottom of the box body 44. In the process of vibration of the screening mechanism 4, when the screening mechanism 4 finishes screening most of the coarse grains on the sieve plate of the box 44, the operator needs to rotate the handle 54, so that the rotating shaft 52 rotates, and then the blanking device 53 rotates, and the blanking device 53 shifts the coarse grains in the charging hopper 51 to the coarse sieve plate 46 of the box 44 from the charging hopper 51. The staff repeats the above-mentioned action, can screen a large amount of coarse grain.
Example 2
As shown in fig. 5, on the basis of embodiment 1, the agricultural coarse grain vibration screening device further includes a third bearing seat 6, a third transmission shaft 7, a belt transmission device 8, a third circular gear 9 and a missing gear 10, the third bearing seat 6 is arranged on the right side of the workbench 3, the third transmission shaft 7 is rotatably arranged on the third bearing seat 6, the belt transmission device 8 is arranged between the front end of the third transmission shaft 7 and the front portion of the rotating shaft 52, the third circular gear 9 is arranged at the rear end of the third transmission shaft 7, the missing gear 10 is arranged at the front end of the second transmission shaft 414, and the missing gear 10 is matched with the third circular gear 9.
At second transmission shaft 414 pivoted in-process, second transmission shaft 414 rotates and to drive scarce gear 10 and rotate, when screening mechanism 4 finishes to the majority screening of coarse cereal that is located on the sieve of box 44, scarce gear 10 can mesh with third round gear 9, thereby make third round gear 9 rotate, and then make third transmission shaft 7 drive pivot 52 through belt drive 8 and rotate, thereby make glassware 53 rotate and realize intermittent type unloading to coarse cereal, just so realized that the intermittent type carries out the unloading to the coarse cereal in the charging hopper 51.
The box body is characterized by further comprising a bent rod 13, a first sliding plate 14, baffle plates 15 and a second sliding plate 16, the bent rod 13 is arranged on the left side of the bottom of the box body 44, the first sliding plate 14 is arranged at the lower end of the bent rod 13, the baffle plates 15 are arranged on the front side and the rear side of the left side of the box body 44, and the second sliding plate 16 is arranged between the baffle plates 15.
In order to enable the screened coarse grains to smoothly flow out of the corresponding sieve plate, the high-quality grains flow to one side of the base 1 through the second sliding plate 16 through the opening on the side wall of the box body 44, and the impurities flow to the other side of the base 1 through the first sliding plate 14 through the opening at the bottom of the box body 44, so that the high-quality grains and the impurities are conveniently collected.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made herein without departing from the principles and spirit of the invention as defined by the appended claims. Therefore, the detailed description of the embodiments of the present disclosure is to be construed as merely illustrative, and not limitative of the remainder of the disclosure, but rather to limit the scope of the disclosure to the full extent set forth in the appended claims.
Claims (5)
1. The utility model provides an agricultural coarse grain vibration screening device which characterized in that includes:
the device comprises a base (1), wherein a support column (2) is arranged on the base (1);
the workbench (3) is arranged on the supporting column (2);
the screening mechanism (4) is arranged on the workbench (3);
the blanking mechanism (5) is arranged on one side of the upper part of the screening mechanism (4).
2. The agricultural coarse grain vibration screening device according to claim 1, wherein the screening mechanism (4) comprises:
the support (41) is symmetrically arranged on the workbench (3) relative to the center line of the workbench (3);
the lower sides of the brackets (41) are symmetrically provided with first connecting rods (42) relative to the center line of the brackets (41), and the first connecting rods (42) are movably connected with the brackets (41);
the cushion rods (43) are movably arranged between the opposite first connecting rods (42);
the box body (44) is arranged on the pad rod (43);
a fine sieve plate (45), and a fine sieve plate (45) is arranged in the box body (44);
a coarse sieve plate (46), wherein the box body (44) is internally provided with the coarse sieve plate (46), and the coarse sieve plate (46) is positioned above the fine sieve plate (45);
the fan-shaped block (47), one side of the bottom of the box body (44) is provided with the fan-shaped block (47);
the first bearing seat (48) is arranged on the workbench (3) close to the fan-shaped block (47);
the first transmission shaft (49) is rotatably arranged in the first bearing seat (48);
the cam (410) is arranged at one end, away from the first bearing seat (48), of the first transmission shaft (49);
the eccentric position on the other side of the cam (410) is movably provided with a second connecting rod (411), and the other end of the second connecting rod (411) is movably connected with the fan-shaped block (47);
the middle part of the first transmission shaft (49) is provided with a first circular gear (412);
the second bearing seat (413) is arranged on the workbench (3) close to the first bearing seat (48);
the second transmission shaft (414) is rotatably arranged on the second bearing seat (413);
a second circular gear (415) is arranged at one end, close to the cam (410), of the second transmission shaft (414), and the second circular gear (415) is meshed with the first circular gear (412);
the servo motor (416) is arranged on the position, close to the second bearing seat (413), of the workbench (3), and the servo motor (416) is connected with the other end of the second transmission shaft (414) through a coupler;
the connecting rod (417), one side of the bracket (41) close to the servo motor (416) is provided with the connecting rod (417).
3. The agricultural coarse grain vibration screening device according to claim 2, wherein the blanking mechanism (5) comprises:
the connecting rod (417) is provided with a charging hopper (51), and one side of the charging hopper (51) close to the box body (44) is provided with a notch;
the rotating shaft (52) is rotatably arranged on one side, close to the box body (44), of the charging hopper (51), and two ends of the rotating shaft (52) are in rotating fit with the bracket (41);
the middle part of the rotating shaft (52) is provided with a blanking device (53), and the blanking device (53) is positioned at the notch of the charging hopper (51);
and one end of the rotating shaft (52) close to the second bearing seat (413) is provided with the handle (54).
4. The agricultural coarse grain vibration screening device of claim 3, further comprising:
a third bearing seat (6), wherein the third bearing seat (6) is arranged on one side, close to the charging hopper (51), of the workbench (3);
the third transmission shaft (7) is rotatably arranged on the third bearing seat (6);
the belt transmission device (8) is arranged at one end, away from the handle (54), of the third transmission shaft (7), and the other end of the belt transmission device (8) is connected with the rotating shaft (52);
a third circular gear (9), and the other end of the third transmission shaft (7) is provided with the third circular gear (9);
the second transmission shaft (414) is provided with the gear lack (10) at one end far away from the cam (410).
5. The agricultural coarse grain vibration screening device of claim 4, further comprising:
the bottom of one side of the box body (44) far away from the blanking mechanism (5) is provided with a bent rod (13);
the other end of the bent rod (13) is provided with a first sliding plate (14);
the baffle (15) is arranged on one side of the box body (44) far away from the blanking mechanism (5);
a second sliding plate (16) is arranged between the baffles (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010779295.2A CN112044735A (en) | 2020-08-05 | 2020-08-05 | Agricultural coarse grain vibration screening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010779295.2A CN112044735A (en) | 2020-08-05 | 2020-08-05 | Agricultural coarse grain vibration screening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112044735A true CN112044735A (en) | 2020-12-08 |
Family
ID=73602630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010779295.2A Withdrawn CN112044735A (en) | 2020-08-05 | 2020-08-05 | Agricultural coarse grain vibration screening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112044735A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112620090A (en) * | 2021-01-06 | 2021-04-09 | 程文帅 | Sand screening installation for building industry |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3680697A (en) * | 1969-01-30 | 1972-08-01 | Tyler Inc W S | Vibratory grain cleaner with feed and discharge means |
| EP1325877A2 (en) * | 2002-01-08 | 2003-07-09 | MARCHESINI GROUP S.p.A. | Device for collecting and recycling articles directed to feeding channels |
| DE10221253A1 (en) * | 2002-05-13 | 2003-11-27 | Backers Maschb Gmbh | Device for sieving, sorting or crushing bulk goods |
| CN107282437A (en) * | 2017-08-20 | 2017-10-24 | 李乐乐 | A kind of double cam Automatic sieve rice device |
| CN108405298A (en) * | 2018-02-28 | 2018-08-17 | 张大华 | A kind of agricultural soybean gyratory sifter screening device |
| CN110216062A (en) * | 2019-06-24 | 2019-09-10 | 郑州工程技术学院 | A kind of civil engineering Sand screen |
-
2020
- 2020-08-05 CN CN202010779295.2A patent/CN112044735A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3680697A (en) * | 1969-01-30 | 1972-08-01 | Tyler Inc W S | Vibratory grain cleaner with feed and discharge means |
| EP1325877A2 (en) * | 2002-01-08 | 2003-07-09 | MARCHESINI GROUP S.p.A. | Device for collecting and recycling articles directed to feeding channels |
| US20030127371A1 (en) * | 2002-01-08 | 2003-07-10 | Marchesini Group S.P.A. | Device for collecting and recycling articles directed to feeding channels |
| DE10221253A1 (en) * | 2002-05-13 | 2003-11-27 | Backers Maschb Gmbh | Device for sieving, sorting or crushing bulk goods |
| CN107282437A (en) * | 2017-08-20 | 2017-10-24 | 李乐乐 | A kind of double cam Automatic sieve rice device |
| CN108405298A (en) * | 2018-02-28 | 2018-08-17 | 张大华 | A kind of agricultural soybean gyratory sifter screening device |
| CN110216062A (en) * | 2019-06-24 | 2019-09-10 | 郑州工程技术学院 | A kind of civil engineering Sand screen |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112620090A (en) * | 2021-01-06 | 2021-04-09 | 程文帅 | Sand screening installation for building industry |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201208 |