IE86273B1 - A process and apparatus for producing asphalt - Google Patents
A process and apparatus for producing asphalt Download PDFInfo
- Publication number
- IE86273B1 IE86273B1 IE20080705A IE20080705A IE86273B1 IE 86273 B1 IE86273 B1 IE 86273B1 IE 20080705 A IE20080705 A IE 20080705A IE 20080705 A IE20080705 A IE 20080705A IE 86273 B1 IE86273 B1 IE 86273B1
- Authority
- IE
- Ireland
- Prior art keywords
- aggregate material
- aggregate
- screen
- vibrating
- heated
- Prior art date
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 80
- 238000012216 screening Methods 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 238000003860 storage Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 12
- 239000004575 stone Substances 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000002994 raw material Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B4/00—Separating by pneumatic tables or by pneumatic jigs
-
- 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
- B07B1/46—Constructional details of screens in general; Cleaning or heating of 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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4681—Meshes of intersecting, non-woven, elements
-
- 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
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/14—Details or accessories
- B07B13/16—Feed or discharge arrangements
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
A process for producing asphalt is disclosed. The process includes discharging heated aggregate material onto a vibrating multi-deck screen, directing and distributing the aggregate material across the screen and screening the aggregate material so as to minimise wear of the vibrating multi-deck screen and damage caused by vibration of the screen while also providing efficient screening of the aggregate. The invention also relates to an apparatus for producing asphalt.
Description
A process and apparatus for producing asphalt 66273 Introduction The present invention relates to a process and apparatus for producing asphalt.
Asphalt production plants usually comprise a steel structure on which Is mounted an asphalt mixer at a height sufficient to allow trucks to drive under for the discharge of asphalt thereon. Above the mixer, there are usually a number of hoppers which in turn are fed aggregate from a plurality of storage bins. Further, above the storage bins, there is usually mounted a screen assembly which separates aggregate into predetermined sizes. Very often, this is a multi-deck screen or alternatively a number of screen assemblies cascading onto one another. Heated aggregate material is delivered onto the screen assembly by an elevator bucket from a dryer. Thus, the asphalt production apparatus is a structure of considerable height with the screen assembly being located at the top end.
One of the main problems with this arrangement is that the screen assembly in particular is prone to damage caused by wear from the aggregate and vibration of the assembly. Specifically, wear of the various screen assembly parts can occur by abrasion of the aggregate as it is distributed onto the screen assembly. Additionally, vibration of the screen assembly can cause various parts of the production plant to disengage which can lead to associated problems with the relatively sensitive measuring equipment utilised. This equipment needs to be continuously calibrated, monitored and maintained and sometimes replaced due to damage caused by the continual vibrations of the screen assembly thus increasing the running costs of the plant.
The present invention is directed towards providing efficient asphalt production while avoiding excessive wear and damage of the components of the asphalt production apparatus. -286273 Statements of Invention According to the invention, there is provided a process for producing asphalt, the process comprising: delivering aggregate material comprising a mixture of aggregate and sand from storage bins through a coarse screen to a dryer; drying and heating the aggregate material in the dryer; extracting exhaust gases and entrained fine material from the dryer, separating the exhaust gases from the fine material by means of a cyclone filter, and collecting the fine material in a filler silo; delivering heated aggregate material from the outlet of the dryer by means of a bucket elevator to a top of a mixing tower; discharging heated aggregate material from the bucket elevator onto a vibrating multi-deck screen at the top of the mixing tower, said heated aggregate material being discharged onto a steel wear plate at a top of the vibrating multi-deck screen; directing the heated aggregate material from the wear plate onto a centre of an adjacent top mesh of the vibrating multi-deck screen for distributing the aggregate material across said top mesh of the vibrating multi-deck screen; screening the heated aggregate material through a number of vertically spaced-apart meshes of different mesh size for separating the aggregate material into preset different sizes; collecting said preset different sizes of aggregate material in separate hot stone storage bins located below the vibrating multi-deck screen on the mixing tower and storing the heated aggregate material in said hot stone storage bins; -3weighing a pre-selected batch of hot aggregate materia! delivered from one or more of the hot stone storage bins; 1 delivering said batch of hot aggregate material together with associated quantities of fine material and heated bitumen to a mixer and mixing said materials to produce asphalt.
In one embodiment of the invention, the process includes directing the heated aggregate material from the wear plate onto the centre of the top mesh by means of an upstanding deflector plate on the wear plate. Thus the aggregate material is distributed across the top screen for efficient screening.
In another embodiment of the invention, the process includes, during a screening cycle; vibrating the multi-deck screen by rotating eccentric heights carried on a shaft which is rotatably mounted in bearings on opposite walls of the multi-deck screen; i rotating the shaft by means of an associated drive motor; and between screening cycles stopping the shaft by reducing the speed of rotation of the shaft and then briefly reversing the drive motor for stopping swinging of the eccentric weights.
By stopping the eccentric weights swinging when the shaft has slowed down, this prevents unwanted heavy vibration of the screen which could potentially cause damage to the screen and other apparatus, particularly sensitive measuring apparatus, nearby.
According to the invention, there is aiso provided an apparatus for producing asphalt; the apparatus comprising: -4a number of storage bins housing aggregate and sand; a coarse screen for screening the aggregate material from the storage bins; a dryer located downstream of the coarse screen for heating and drying the aggregate material; an exhaust fan for extracting exhaust gases and entrained fine material from the dryer; a cyclone filter located between the exhaust fan and the dryer for separating the exhaust gases from the fine material; a filler silo for collecting the separated fine material; a bucket elevator for delivering heated aggregate material from the dryer to a top of a mixing tower, the mixing tower having mounted thereon: a vibrating multi-deck screen having a steel wear plate and a top mesh formed between an upstanding front wall, a rear wall, a top end wall and a bottom end wall and a number of vertically spaced-apart meshes of different mesh size for separating the aggregate material into preset different sizes; a number of hot stone storage bins located below the vibrating multi-deck screen on the mixing tower for storing the heated aggregate material; an aggregate weigh hopper for weighing a pre-selected batch of hot aggregate material delivered from one or more of the hot stone storage bins; and a mixer for mixing together said batch of hot aggregate material and associated quantities of fine material and heated bitumen to produce asphalt. -5ln one embodiment of the invention, the vibrating multi-deck screen further comprises an upstanding deflector plate mounted on the steel wear plate for directing the heated aggregate material from the wear plate onto the centre of the top mesh.
In another embodiment of the invention, the apparatus further comprises a vibrating mechanism having: a rotatable shaft mounted in bearings on opposite walls of the vibrating multi-deck screen and rotatable by an associated drive motor which is drivably connected thereto, and a pair of eccentric weights mounted on the shaft for creating vibration as the shaft rotates, and a controller associated with the drive motor which is operable when the shaft has slowed down for very briefly reversing the motor to stop the eccentric weights from swinging.
Brief Description of the Drawings The invention will be more clearly understood from the following description of some embodiments thereof given by way of example only with reference to the accompanying drawings; in which; Fig. 1 is a schematic illustration of the asphalt production process of the invention; Fig. 2 is a schematic elevational view of an asphalt production apparatus used in the process; Fig. 3 is a detail perspective view showing an inlet of a vibrating multi-deck screen forming portion of the asphalt production apparatus; and Fig. 4 is a detail, partially cut-away view showing the vibrating multi-deck screen.
Detailed Description of the Invention -6Referring to Fig. 1 there is provided a general layout of an asphalt production process line indicated generally by the reference numeral 1. The process line 1 comprises raw material storage bins 2, 3 for aggregate and sand respectively. Selected quantities of raw material from the bins 2, 3 are delivered as required through a coarse screen 4 to a dryer 5. As the raw materials pass through the dryer 5, they are heated to a required temperature by means of a burner (not shown). An exhaust fan 6 draws out exhaust gases and any entrained fine material from the dryer 5. The gases and material are drawn through a cyclone filter 7 which separates out the fine dust material from the exhaust gases. The exhaust gases are then delivered to a flue (not shown) for venting to the atmosphere in the usual way. The fine material is delivered from the cyclone filter 7 to a filler silo 8 which discharges the material through a rotary vane feeder 9 to a filler weigh hopper 10.
Upon discharge from the dryer 5 the heated aggregate material is delivered by a bucket elevator 11 onto a vibrating multi-deck screen 12. The vibrating multi-deck screen 12 separates the heated aggregate material into different sizes (typically 6mm, 10mm, 15mm, 20mm), each of which is then collected and stored in hot stone storage bins 13, 14, 15, 16. Selected quantities of material from each bin 13, 14, 15, 16 can be delivered as required to an aggregate weigh hopper 17.
Selected ingredient materials are delivered from the filler weigh hopper 10, the aggregate weigh hopper 17 and a bitumen kettle 18 into an asphalt mixer 20. After mixing in the asphalt mixer 20 the asphalt is discharged into a truck 22.
Fig. 2 shows a part of the asphalt production apparatus and in particular an upright steel tower 30 with the various components as previously described mounted thereon.
Referring to Fig. 3, an inlet of the vibrating multi-deck screen 12 is shown. The vibrating multi-deck screen 12 comprises a steel wear plate 40 and a top mesh 41 formed between an upstanding front wall 42, a rear wall 43, a top end wall 44 and a bottom end wall 45. The steel wear plate 40 and top mesh 41 slope downwardly from the top end wall 44 to the bottom end wall 45. The steel wear plate 40 avoids impact damage to the top mesh 41 by the aggregate material discharged from the bucket elevator 11. A deflector 46 is mounted on the steel wear plate 40. The bucket elevator 11 discharges aggregate material from one side onto the steel wear plate 40 towards the rear wall 43. However, the deflector 46 directs the aggregate onto the centre of the top mesh 41 so that it will distribute fairly evenly over the top mesh 41 as it travels to the bottom end wall 45 of the screen 12. This arrangement allows a greater portion of the mesh 41 to be used to increase throughput and prevents all of the aggregate material discharged from the bucket elevator 11 migrating directly to the rear wall 43 of the screen 12 and then downwardly onto the portion of the top mesh 41 adjacent the rear wall 43 only.
Referring now to Fig. 4, the screen 12 is shown in more detail. The screen 12 is mounted on an incline such that the bottom end wall 45 is lower than the top end wall 44 in order for aggregate material to feed between the top end wall 44 and bottom end wall 45. The screen 12 is mounted at each corner on springs 51. A vibrating mechanism 52 comprises a shaft 53 mounted in bearings 54 on the front wall 42 and rear wall 43 at a mid-way position. Eccentric weights 55 are mounted on the shaft 53 for creating the vibration as the shaft 53 rotates. The shaft 53 has a pulley 56 at one end which is driven by a drive belt 57 and drive pulley 58 connected to a drive motor 59.
As well as comprising the top mesh 41 the screen 12 also comprises a number of further vertically spaced-apart meshes 60, 61 mounted within the screen 12. In operation, aggregate material is thrown out from the bucket elevator onto the top mesh 41 and works its way down through the various meshes 41, 60, 61 before being directed off to the hot stone bins 13,14,15,16.
The vibrating mechanism 52 is operated during use of the screen 12. The apparatus is generally operated intermittently with the vibrating multi-deck screen 12 being continuously stopped and started. When vibration of the screen 12 is to be stopped, the drive motor 59 is switched off which causes the shaft 53 to stop rotating. The eccentric weights 55 continue to rotate and thus cause the shaft 53 to continue rotating, gradually slowing down, until eventually it ceases to rotate. When the rotation of the eccentric weights 55 slows down to the point where the eccentric weights 55 are just about to start swinging back and forth rather than fully rotate, a controller 70 which is associated with the drive motor 59 reverses the motor 59 very briefly and stops the eccentric weights 55 from swinging and causing unwanted vibration. -8In the specification the terms "comprise, comprises, comprised and comprising" or any variation thereof and the terms "include, includes, included and including" or any variation thereof are considered to be totally interchangeable and they should all be afforded the widest possible interpretation and vice versa.
The invention is not limited to the embodiment hereinbefore described, but may be varied in both construction and detail within the scope of the appended claims.
Claims (8)
1. A process for producing asphait, the process comprising: delivering aggregate material comprising a mixture of aggregate and sand from storage bins through a coarse screen to a dryer; drying and heating the aggregate material in the dryer; extracting exhaust gases and entrained fine material from the dryer, separating the exhaust gases from the fine material by means of a cyclone filter, and coliecting the fine material in a filler silo; delivering heated aggregate material from the outlet of the dryer by means of a bucket elevator to a top of a mixing tower; discharging heated aggregate material from the bucket elevator onto a vibrating multi-deck screen at the top of the mixing tower, said heated aggregate material being discharged onto a steel wear plate at a top of the vibrating multi-deck screen; directing the heated aggregate material from the wear plate onto a centre of an adjacent top mesh of the vibrating multi-deck screen for distributing the aggregate material across said top mesh of the vibrating multi-deck screen; screening the heated aggregate material through a number of vertically spaced-apart meshes of different mesh size for separating the aggregate material into preset different sizes; collecting said preset different sizes of aggregate material in separate hot stone storage bins located below the vibrating multi-deck screen on the mixing tower and storing the heated aggregate material in said hot stone storage bins; -10weighing a pre-selected batch of hot aggregate material delivered from one or more of the hot stone storage bins; delivering said batch of hot aggregate material together with associated 5 quantities of fine material and heated bitumen to a mixer and mixing said materials to produce asphalt.
2. A process as claimed in claim 1, wherein the process includes directing the heated aggregate material from the wear plate onto the centre of the top mesh 10 by means of an upstanding deflector plate on the wear plate.
3. A process as claimed in claim 1 or claim 2, wherein the process includes, during a screening cycle; 15 vibrating the multi-deck screen by rotating eccentric weights carried on a shaft which is rotatably mounted in bearings on opposite wails of the multi-deck screen; rotating the shaft by means of an associated drive motor; and between screening cycles stopping the shaft by reducing the speed of rotation of the shaft and then briefly reversing the drive motor for stopping swinging of the eccentric weights. 25
4. A process substantially as hereinbefore described with reference to the accompanying drawings.
5. An apparatus for producing asphalt; the apparatus comprising: 30 a number of storage bins housing aggregate and sand; a coarse screen for screening the aggregate material from the storage bins; 35 a dryer located downstream of the coarse screen for heating and drying -11 the aggregate material; an exhaust fan for extracting exhaust gases and entrained fine material from the dryer; a cyclone filter located between the exhaust fan and the dryer for separating the exhaust gases from the fine material; a filler silo for collecting the separated fine material; a bucket elevator for delivering heated aggregate material from the dryer to a top of a mixing tower, the mixing tower having mounted thereon: a vibrating multi-deck screen having a steel wear plate and a top mesh formed between an upstanding front wall, a rear wall, a top end wall and a bottom end wall and a number of vertically spaced-apart meshes of different mesh size for separating the aggregate material into preset different sizes; a number of hot stone storage bins located below the vibrating multi-deck screen on the mixing tower for storing the heated aggregate material; an aggregate weigh hopper for weighing a pre-selected batch of hot aggregate material delivered from one or more of the hot stone storage bins; and a mixer for mixing together said batch of hot aggregate material and associated quantities of fine material and heated bitumen to produce asphalt.
6. An apparatus as claimed in claim 5, wherein the vibrating multi-deck screen further comprises an upstanding deflector plate mounted on the steel wear plate for directing the heated aggregate material from the wear plate onto the centre of the top mesh. -127.
An apparatus as claimed in any of claims 5 or 6 further comprising a vibrating mechanism having: a rotatable shaft mounted in bearings on opposite walls of the vibrating 5 multi-deck screen and rotatable by an associated drive motor which is drivably connected thereto, and a pair of eccentric weights mounted on the shaft for creating vibration as the shaft rotates, and a controller associated with the drive motor which is operable when the 10 shaft has slowed down for very briefly reversing the motor to stop the eccentric weights from swinging.
8. An apparatus substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE20080705A IE86273B1 (en) | 2008-03-31 | 2008-08-29 | A process and apparatus for producing asphalt |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE20080241A IES20080241A2 (en) | 2008-03-31 | 2008-03-31 | A method of operating an asphalt plant |
| IE20080705A IE86273B1 (en) | 2008-03-31 | 2008-08-29 | A process and apparatus for producing asphalt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE20080705A1 IE20080705A1 (en) | 2009-10-28 |
| IE86273B1 true IE86273B1 (en) | 2013-10-09 |
Family
ID=39865921
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE20080241A IES20080241A2 (en) | 2008-03-31 | 2008-03-31 | A method of operating an asphalt plant |
| IE20080705A IE86273B1 (en) | 2008-03-31 | 2008-08-29 | A process and apparatus for producing asphalt |
| IE20080706A IES20080706A2 (en) | 2008-03-31 | 2008-08-29 | A process and apparatus for producing asphalt |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE20080241A IES20080241A2 (en) | 2008-03-31 | 2008-03-31 | A method of operating an asphalt plant |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE20080706A IES20080706A2 (en) | 2008-03-31 | 2008-08-29 | A process and apparatus for producing asphalt |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2458977B (en) |
| IE (3) | IES20080241A2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012103019A1 (en) * | 2012-04-05 | 2013-10-10 | Haver & Boecker Ohg | Feeding device for a screening machine |
| JP6065864B2 (en) * | 2014-03-20 | 2017-01-25 | セイコーエプソン株式会社 | Sheet manufacturing apparatus and sheet manufacturing method |
| CN105855158B (en) * | 2016-03-31 | 2017-08-25 | 中国矿业大学(北京) | A kind of amplitude, the variable vibrated bed in inclination angle and track |
| WO2017173482A1 (en) * | 2016-04-03 | 2017-10-12 | Bruce Neumann | A screening apparatus |
| GB2605811B (en) * | 2021-04-14 | 2023-05-10 | Cde Global Ltd | Dewatering screen |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19627039A1 (en) * | 1996-07-05 | 1998-01-08 | Gotek Gmbh | Sieve plate |
| CA2184645C (en) * | 1996-09-03 | 1999-08-24 | Douglas J. Macnaughton | Vibrating screen with arched frame and ballast |
| CA2524540C (en) * | 2004-11-01 | 2008-07-29 | Pac Mining Pty Ltd | Laminated screen plate |
| US7591377B2 (en) * | 2006-01-10 | 2009-09-22 | James John Puda | Method and apparatus for a vibrating screen aggregate separator |
-
2008
- 2008-03-31 IE IE20080241A patent/IES20080241A2/en not_active IP Right Cessation
- 2008-08-29 IE IE20080705A patent/IE86273B1/en not_active IP Right Cessation
- 2008-08-29 GB GB0815730.7A patent/GB2458977B/en not_active Expired - Fee Related
- 2008-08-29 IE IE20080706A patent/IES20080706A2/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB0815730D0 (en) | 2008-10-08 |
| IES20080241A2 (en) | 2009-09-30 |
| GB2458977A (en) | 2009-10-07 |
| IE20080705A1 (en) | 2009-10-28 |
| GB2458977B (en) | 2012-04-18 |
| IES20080706A2 (en) | 2009-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed |