CA2614535A1 - Extraction device for use when extracting a ceramic foam filter - Google Patents
Extraction device for use when extracting a ceramic foam filter Download PDFInfo
- Publication number
- CA2614535A1 CA2614535A1 CA002614535A CA2614535A CA2614535A1 CA 2614535 A1 CA2614535 A1 CA 2614535A1 CA 002614535 A CA002614535 A CA 002614535A CA 2614535 A CA2614535 A CA 2614535A CA 2614535 A1 CA2614535 A1 CA 2614535A1
- Authority
- CA
- Canada
- Prior art keywords
- extraction device
- filter
- screw thread
- anchor
- anchor body
- 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.)
- Abandoned
Links
- 238000000605 extraction Methods 0.000 title claims abstract description 76
- 239000000919 ceramic Substances 0.000 title claims abstract description 17
- 239000006260 foam Substances 0.000 title claims abstract description 15
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920001247 Reticulated foam Polymers 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/066—Treatment of circulating aluminium, e.g. by filtration
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
- C22B9/023—By filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
- F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49815—Disassembling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53687—Means to assemble or disassemble by rotation of work part
Abstract
An extraction device is provided for use when extracting a ceramic foam filter, as used for example in the production and processing of aluminium. The extraction device includes an anchor device (1) having an anchor body (2) suitable for driving into the filter, and a screw thread (8) that extends along at least part of the length of the anchor body, for engagement with the filter.
Description
EXTRACTION DEVICE FOR USE WHEN
EXTRACTING A CERAMIC FOAM FILTER
The present invention relates to an extraction device for use when extracting a ceramic foam filter, as used for example in the production and processing of aluminium and other metals.
Molten aluminium usually has to be filtered before it is cast. The filtration process removes particles that could otherwise cause rejects in the final products.
Traditionally, ceramic foam filters are used. These are made from alumina refractory slurry by impregnating a reticulated foam manufactured to a specific porosity with the slurry. The impregnated foain is then dried and fired in a kiln. The foam burns off leaving a porous ceramic body, which is used as the filter. Ceramic filters come in various sizes, typically 7", 9",12",15",17", 20", 23" and 26" wide, and 2" thick (16cm, 20cm, 27cm, 34cm, 38cm, 45cm, 52cm and 58cm wide, and 5cm thick).
For use, the filter is mounted in a refractory filter bowl. Liquid aluminium is poured into the bowl through the filter, which traps fine particles in the liquid metal.
When the casting operation is complete, the aluminium remaining within the ceramic filter freezes, forming a block of virtually solid aluminium.
After use, the filter must be removed and replaced before the next casting operation.
Current industrial practice to remove the filter is to stab a hole in the filter while it is still full of liquid aluminium. The aluminium is then allowed to freeze, after which the filter is pulled out using a hooked steel bar. This is not however a very elegant or safe solution, as liquid metal can splash out when puncturing the filter. The refractory bowl that houses the filter may also be damaged if the steel spike passes through the filter and jabs the base.
Broken filter parts can also sometimes get washed into the next cast.
It is an object of the present invention to provide a filter extraction device, and a method of extracting a filter, that mitigates at least some of the aforesaid disadvantages.
EXTRACTING A CERAMIC FOAM FILTER
The present invention relates to an extraction device for use when extracting a ceramic foam filter, as used for example in the production and processing of aluminium and other metals.
Molten aluminium usually has to be filtered before it is cast. The filtration process removes particles that could otherwise cause rejects in the final products.
Traditionally, ceramic foam filters are used. These are made from alumina refractory slurry by impregnating a reticulated foam manufactured to a specific porosity with the slurry. The impregnated foain is then dried and fired in a kiln. The foam burns off leaving a porous ceramic body, which is used as the filter. Ceramic filters come in various sizes, typically 7", 9",12",15",17", 20", 23" and 26" wide, and 2" thick (16cm, 20cm, 27cm, 34cm, 38cm, 45cm, 52cm and 58cm wide, and 5cm thick).
For use, the filter is mounted in a refractory filter bowl. Liquid aluminium is poured into the bowl through the filter, which traps fine particles in the liquid metal.
When the casting operation is complete, the aluminium remaining within the ceramic filter freezes, forming a block of virtually solid aluminium.
After use, the filter must be removed and replaced before the next casting operation.
Current industrial practice to remove the filter is to stab a hole in the filter while it is still full of liquid aluminium. The aluminium is then allowed to freeze, after which the filter is pulled out using a hooked steel bar. This is not however a very elegant or safe solution, as liquid metal can splash out when puncturing the filter. The refractory bowl that houses the filter may also be damaged if the steel spike passes through the filter and jabs the base.
Broken filter parts can also sometimes get washed into the next cast.
It is an object of the present invention to provide a filter extraction device, and a method of extracting a filter, that mitigates at least some of the aforesaid disadvantages.
According to the present invention there is provided an extraction device for use when extracting a ceramic foam filter, the extraction device including an anchor device suitable for driving into the filter, said anchor device having an anchor body and a screw thread that extends along at least part of the length of the anchor body, for engagement with the filter.
The extraction device may be used to extract a used ceramic foam filter safely and efficiently. Because the filter is not broken violently, there is no significant risk of liquid aluminium being splashed out of the filter or the filter bowl, and very little or no loose debris will be created, so reducing the risk of contaminating a subsequent batch of aluminium. The extraction device locks firmly into the filter, reducing the risk of it being dropped.
Advantageously, the extraction device includes connection means for connecting the extraction device to an insertion/extraction tool. The connection means preferably comprises a screw thread provided at one end of the anchor body.
Alternatively, some other kind of connection means may be provided, for example a bayonet connector.
The anchor device preferably includes a cutter element at one end of the anchor body, for cutting a passageway in the filter. The cutter element preferably comprises a blade or a plurality of blades provided at one end of the anchor body. The cutter blade allows the extraction device to be driven into the ceramic foam filter without causing it to crack or break. This also helps to ensure that the screw thread makes a strong connection with the filter material.
Advantageously, the anchor device has an overall length in the range 20-48mm, preferably approximately 45mm. This ensures that when the anchor device is inserted into the filter to its full depth, it does not break through the opposite side of the filter, thereby preventing debris from falling into the filter bowl.
Advantageously, the overall diameter of the screw thread is in the range 25-100mm, preferably approximately 55mm. The anchor body is preferably cylindrical, having a diameter in the range 13-22mm, preferably 15mm. Advantageously, the screw thread comprises from one to eight turns, preferably about two turns. We have found that a screw thread with only a few widely spaced turns provides a much stronger connection with the rather crumbly material of the ceramic foam filter than a thread with more closely spaced turns. Advantageously, the screw thread has a pitch in the range 5-30mm, preferably 8-20mm. The radial depth of the screw thread is advantageously between 10 and 35mm, preferably approximately 20mm, and the thickness of the screw thread is advantageously between 0.2 and 2.0mm, preferably approximately 1.0mm.
Advantageously, the extraction device includes a stop member attached to one end of the anchor device. This prevents the anchor device from being driven too far into the filter.
The extraction device is preferably made from carbon steel. Alternatively, it may be made from stainless steel, aluminium or another suitable material.
According to another aspect of the invention there is provided a method of extracting a ceramic foam filter, the method including screwing an extraction device into the filter, said extraction device including an anchor device having an anchor body and a screw thread that extends along at least part of the length of the anchor body, and lifting the extraction device to extract the filter.
The extraction device is preferably as defined by any one of the preceding statements of invention.
Various embodiments of the invention will now be described by way of example, with reference to the accompanying drawings, in which:
Figure 1 is an isometric view of a first extraction device according to the invention;
Figure 2 is a side elevation of the first extraction device;
Figure 3 is a front elevation of the first extraction device;
Figure 4 is an end view of the first extraction device;
Figure 5 is a cross-section of the first extraction device on line V-V of Figure 2;
Figure 6 is an isometric view of a second extraction device according to the invention;
The extraction device may be used to extract a used ceramic foam filter safely and efficiently. Because the filter is not broken violently, there is no significant risk of liquid aluminium being splashed out of the filter or the filter bowl, and very little or no loose debris will be created, so reducing the risk of contaminating a subsequent batch of aluminium. The extraction device locks firmly into the filter, reducing the risk of it being dropped.
Advantageously, the extraction device includes connection means for connecting the extraction device to an insertion/extraction tool. The connection means preferably comprises a screw thread provided at one end of the anchor body.
Alternatively, some other kind of connection means may be provided, for example a bayonet connector.
The anchor device preferably includes a cutter element at one end of the anchor body, for cutting a passageway in the filter. The cutter element preferably comprises a blade or a plurality of blades provided at one end of the anchor body. The cutter blade allows the extraction device to be driven into the ceramic foam filter without causing it to crack or break. This also helps to ensure that the screw thread makes a strong connection with the filter material.
Advantageously, the anchor device has an overall length in the range 20-48mm, preferably approximately 45mm. This ensures that when the anchor device is inserted into the filter to its full depth, it does not break through the opposite side of the filter, thereby preventing debris from falling into the filter bowl.
Advantageously, the overall diameter of the screw thread is in the range 25-100mm, preferably approximately 55mm. The anchor body is preferably cylindrical, having a diameter in the range 13-22mm, preferably 15mm. Advantageously, the screw thread comprises from one to eight turns, preferably about two turns. We have found that a screw thread with only a few widely spaced turns provides a much stronger connection with the rather crumbly material of the ceramic foam filter than a thread with more closely spaced turns. Advantageously, the screw thread has a pitch in the range 5-30mm, preferably 8-20mm. The radial depth of the screw thread is advantageously between 10 and 35mm, preferably approximately 20mm, and the thickness of the screw thread is advantageously between 0.2 and 2.0mm, preferably approximately 1.0mm.
Advantageously, the extraction device includes a stop member attached to one end of the anchor device. This prevents the anchor device from being driven too far into the filter.
The extraction device is preferably made from carbon steel. Alternatively, it may be made from stainless steel, aluminium or another suitable material.
According to another aspect of the invention there is provided a method of extracting a ceramic foam filter, the method including screwing an extraction device into the filter, said extraction device including an anchor device having an anchor body and a screw thread that extends along at least part of the length of the anchor body, and lifting the extraction device to extract the filter.
The extraction device is preferably as defined by any one of the preceding statements of invention.
Various embodiments of the invention will now be described by way of example, with reference to the accompanying drawings, in which:
Figure 1 is an isometric view of a first extraction device according to the invention;
Figure 2 is a side elevation of the first extraction device;
Figure 3 is a front elevation of the first extraction device;
Figure 4 is an end view of the first extraction device;
Figure 5 is a cross-section of the first extraction device on line V-V of Figure 2;
Figure 6 is an isometric view of a second extraction device according to the invention;
Figure 7 is a front elevation of the second extraction device;
Figure 8 is an end view of the second extraction device; and Figure 9 is a cross-section of the second extraction device, on line IX-IX of Figure 8.
The first extraction device shown in Figures 1-5 includes an anchor device 1 comprising a cylindrical anchor body 2 having a cutter blade 4 at one end of the body and a cylindrical bore 6 at the other end of the body. The outline shape of the cutter blade 4 is a trapezium (US trapezoid) and the leading edge of the blade is sharpened, so that it will cut into a ceramic foam filter. The bore 6 is provided with an internal female screw thread (not shown), forming a connection means for connecting the extraction device to an insertion/extraction tool (not shown). The insertion/extraction tool may for example consist of a T-bar having a screw thread at one end, for engagement with the internal screw thread in the bore 6. The insertion/extraction tool may also include a lifting eye, for connection to a hoist or other lifting device.
An external male helical screw thread 8 extends outwards from the cylindrical surface of the anchor body 2. In the embodiment shown in the drawings, this screw thread extends along the entire length of the anchor body and includes approximately four widely spaced turns. The screw thread has a radial depth of approximately 20mm, a thickness of about 1mm and a pitch of about 8.5mm. The anchor body 2 has a diameter of approximately 15mm, so that the overall diameter of the extraction device is approximately 55mm. The anchor device 1 has a length of approximately 45mm, the anchor body 2 having a length of approximately 35mm and the blade 4 having a length of approximately 10mm.
The extraction device is made for example of carbon steel.
In use, an insertion/extraction tool is connected to the extraction device, by being screwed into the threaded bore 6 at the upper end of the anchor body 2. Then, while the aluminium within the filter is still in a liquid state, the extraction device is driven into the upper face of the ceramic foam filter by rotating the insertion/extraction tool. As it rotates, the cutter blade 4 cuts a cylindrical hole in the filter, to accommodate the cylindrical anchor body.
The screw thread cuts a helical screw into the filter around the bore made by the cutter blade 4, so locking the extraction device into the filter. The extraction device is driven into the filter until the anchor device 1 is embedded to its full depth and the upper end of the anchor body 2 is flush with the top surface of the filter. As the length of the anchor device 1 is slightly less than the thickness of the filter, it will not break through the lower face of 5 the filter, so preventing debris from falling into the filter bowl.
The extraction device is left in the filter until the retained aluminium has solidified: this further increases the mechanical interlock between the extraction device and the filter. The filter is then extracted from the filter bowl by lifting the insertion/extraction tool. The filter can therefore be removed easily and cleanly, without leaving debris in the filter bowl and without giving rise to a risk of liquid aluminium being splashed out of the filter. A new filter can then be placed in the filter bowl so that it is ready for another casting operation.
A second extraction device according to the invention is shown in Figures 6-9.
This is similar in many respects to the first extraction device described above and similar reference numbers have been used where appropriate.
Where the second extraction device differs from the first extraction device is in the provision of a stop member 10, comprising an annular plate that is attached to the upper end of the anchor body 2. The diameter of the stop member 10 is greater than the diameter of the screw thread 8, so that it extends outwards beyond the outer edge of the screw thread.
For example, the stop plate 10 may have a diameter of approximately 75mm.
The second extraction device is used in the same way as the first extraction device described above. However, when the anchor device 1 has been driven fully into the filter, the stop plate 10 abuts the face of the filter, preventing the anchor device from being driven any further into the filter. This ensures that no part of the anchor device breaks through the lower surface of the filter. Once the anchor device 1 has been driven fully into the filter and the aluminium has solidified, the filter is removed as described previously.
Various modifications of the extraction device are of course possible, for example, the anchor device may have an overall lengtli in the range 20-48mm and a diameter in the range of 13-22mm. The screw thread may have been one and eight turns, preferably approximately two turns, with a radial depth of 10-35mm and a thickness of 0.2-2.0mm, preferably about 1.0mm. The anchor body may also take other forms, for example it may be conical or frusto-conical, and the screw thread may also increase in diameter from one end of the anchor body to the other. The extraction device may be made from carbon steel or other suitable materials, for example stainless steel or aluminium.
Figure 8 is an end view of the second extraction device; and Figure 9 is a cross-section of the second extraction device, on line IX-IX of Figure 8.
The first extraction device shown in Figures 1-5 includes an anchor device 1 comprising a cylindrical anchor body 2 having a cutter blade 4 at one end of the body and a cylindrical bore 6 at the other end of the body. The outline shape of the cutter blade 4 is a trapezium (US trapezoid) and the leading edge of the blade is sharpened, so that it will cut into a ceramic foam filter. The bore 6 is provided with an internal female screw thread (not shown), forming a connection means for connecting the extraction device to an insertion/extraction tool (not shown). The insertion/extraction tool may for example consist of a T-bar having a screw thread at one end, for engagement with the internal screw thread in the bore 6. The insertion/extraction tool may also include a lifting eye, for connection to a hoist or other lifting device.
An external male helical screw thread 8 extends outwards from the cylindrical surface of the anchor body 2. In the embodiment shown in the drawings, this screw thread extends along the entire length of the anchor body and includes approximately four widely spaced turns. The screw thread has a radial depth of approximately 20mm, a thickness of about 1mm and a pitch of about 8.5mm. The anchor body 2 has a diameter of approximately 15mm, so that the overall diameter of the extraction device is approximately 55mm. The anchor device 1 has a length of approximately 45mm, the anchor body 2 having a length of approximately 35mm and the blade 4 having a length of approximately 10mm.
The extraction device is made for example of carbon steel.
In use, an insertion/extraction tool is connected to the extraction device, by being screwed into the threaded bore 6 at the upper end of the anchor body 2. Then, while the aluminium within the filter is still in a liquid state, the extraction device is driven into the upper face of the ceramic foam filter by rotating the insertion/extraction tool. As it rotates, the cutter blade 4 cuts a cylindrical hole in the filter, to accommodate the cylindrical anchor body.
The screw thread cuts a helical screw into the filter around the bore made by the cutter blade 4, so locking the extraction device into the filter. The extraction device is driven into the filter until the anchor device 1 is embedded to its full depth and the upper end of the anchor body 2 is flush with the top surface of the filter. As the length of the anchor device 1 is slightly less than the thickness of the filter, it will not break through the lower face of 5 the filter, so preventing debris from falling into the filter bowl.
The extraction device is left in the filter until the retained aluminium has solidified: this further increases the mechanical interlock between the extraction device and the filter. The filter is then extracted from the filter bowl by lifting the insertion/extraction tool. The filter can therefore be removed easily and cleanly, without leaving debris in the filter bowl and without giving rise to a risk of liquid aluminium being splashed out of the filter. A new filter can then be placed in the filter bowl so that it is ready for another casting operation.
A second extraction device according to the invention is shown in Figures 6-9.
This is similar in many respects to the first extraction device described above and similar reference numbers have been used where appropriate.
Where the second extraction device differs from the first extraction device is in the provision of a stop member 10, comprising an annular plate that is attached to the upper end of the anchor body 2. The diameter of the stop member 10 is greater than the diameter of the screw thread 8, so that it extends outwards beyond the outer edge of the screw thread.
For example, the stop plate 10 may have a diameter of approximately 75mm.
The second extraction device is used in the same way as the first extraction device described above. However, when the anchor device 1 has been driven fully into the filter, the stop plate 10 abuts the face of the filter, preventing the anchor device from being driven any further into the filter. This ensures that no part of the anchor device breaks through the lower surface of the filter. Once the anchor device 1 has been driven fully into the filter and the aluminium has solidified, the filter is removed as described previously.
Various modifications of the extraction device are of course possible, for example, the anchor device may have an overall lengtli in the range 20-48mm and a diameter in the range of 13-22mm. The screw thread may have been one and eight turns, preferably approximately two turns, with a radial depth of 10-35mm and a thickness of 0.2-2.0mm, preferably about 1.0mm. The anchor body may also take other forms, for example it may be conical or frusto-conical, and the screw thread may also increase in diameter from one end of the anchor body to the other. The extraction device may be made from carbon steel or other suitable materials, for example stainless steel or aluminium.
Claims (16)
1. An extraction device for use when extracting a ceramic foam filter, the extraction device including an anchor device suitable for driving into the filter, said anchor device having an anchor body and a screw thread that extends along at least part of the length of the anchor body, for engagement with the filter.
2. An extraction device according to claim 1, including connection means for connecting the extraction device to an insertion/extraction tool.
3. An extraction device according to claim 2, wherein the connection means comprises a screw thread provided at one end of the anchor body.
4. An extraction device according to any one of the preceding claims, wherein the anchor device includes a cutter element at one end of the anchor body, for cutting a passageway in the filter.
5. An extraction device according to claim 4, wherein the cutter element comprises a blade or a plurality of blades provided at one end of the anchor body.
6. An extraction device according to any one of the preceding claims, wherein the anchor device has an overall length in the range 20-48mm, preferably approximately 45mm.
7. An extraction device according to any one of the preceding claims, wherein the overall diameter of the screw thread is in the range 25-100mm, preferably approximately 55mm.
8 8. An extraction device according to any one of the preceding claims, wherein anchor body is cylindrical, having a diameter in the range 13-22mm, preferably approximately 15mm.
9. An extraction device according to any one of the preceding claims, wherein the screw thread has a pitch in the range 5-30mm, preferably 8-20mm.
10. An extraction device according to any one of the preceding claims, wherein the screw thread comprises from one to eight turns, preferably about two turns.
11. An extraction device according to any one of the preceding claims, wherein radial depth of the screw thread is between 10mm and 35mm, preferably approximately 20mm.
12. An extraction device according to any one of the preceding claims, wherein thickness of the screw thread is between 0.2mm and 2.0mm, preferably approximately 1.0mm.
13. An extraction device according to any one of the preceding claims, wherein the extraction device includes a stop member attached to one end of the anchor body.
14. An extraction device according to any one of the preceding claims, wherein the extraction device is made from carbon steel.
15. A method of extracting a ceramic foam filter, the method including screwing an extraction device into the filter, said extraction device including an anchor device having an anchor body and a screw thread that extends along at least part of the length of the anchor body, and lifting the extraction device to extract the filter.
16. A method according to any one of the preceding claims, wherein the extraction device is as defined by any one of claims 1 to 14.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0515153A GB2428619A (en) | 2005-07-23 | 2005-07-23 | Extraction device |
| GB0515153.5 | 2005-07-23 | ||
| PCT/GB2006/002232 WO2007012795A1 (en) | 2005-07-23 | 2006-06-19 | Extraction device for use when extracting a ceramic foam filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2614535A1 true CA2614535A1 (en) | 2007-02-01 |
Family
ID=34976456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002614535A Abandoned CA2614535A1 (en) | 2005-07-23 | 2006-06-19 | Extraction device for use when extracting a ceramic foam filter |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US8112864B2 (en) |
| EP (1) | EP1910689B1 (en) |
| CN (1) | CN101203682B (en) |
| AT (1) | ATE478265T1 (en) |
| BR (1) | BRPI0610384A2 (en) |
| CA (1) | CA2614535A1 (en) |
| DE (1) | DE602006016293D1 (en) |
| ES (1) | ES2350705T3 (en) |
| GB (1) | GB2428619A (en) |
| NO (1) | NO20080964L (en) |
| WO (1) | WO2007012795A1 (en) |
| ZA (1) | ZA200800586B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2428619A (en) | 2005-07-23 | 2007-02-07 | Pyrotek Inc | Extraction device |
| EP2160799A4 (en) | 2007-03-16 | 2012-05-16 | Tyco Electronics Services Gmbh | Metamaterial antenna arrays with radiation pattern shaping and beam switching |
| KR101297314B1 (en) | 2007-10-11 | 2013-08-16 | 레이스팬 코포레이션 | Single-layer metallization and via-less metamaterial structures |
| GB2453587A (en) * | 2007-10-12 | 2009-04-15 | Pyrotek Engineering Materials | Extraction device for extracting a ceramic foam filter |
| USD794188S1 (en) * | 2016-05-02 | 2017-08-08 | Shukla Medical | Stripped screw extractor |
| JP7125422B2 (en) * | 2017-04-10 | 2022-08-24 | パイロテック インコーポレイテッド | filter handling tools |
| US10746216B2 (en) | 2018-03-30 | 2020-08-18 | Food Grade Solutions, Llc | Wall mounting assembly |
| US10914334B2 (en) | 2018-03-30 | 2021-02-09 | Food Grade Solutions, Llc | Wall mounting assembly |
| USD882385S1 (en) * | 2018-03-30 | 2020-04-28 | Food Grade Solutions, Llc | Wall anchor |
| US11428255B2 (en) | 2018-03-30 | 2022-08-30 | Food Grade Solutions, Llc | Wall mounting assembly |
| USD950723S1 (en) * | 2018-11-21 | 2022-05-03 | Shukla Medical | Nail extractor |
Family Cites Families (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB593548A (en) * | 1945-06-04 | 1947-10-20 | Frederick William Whybrow Fren | Improvements in or relating to tools for removing bungs from casks |
| US330974A (en) * | 1885-11-24 | And abraham l | ||
| US2504978A (en) | 1946-02-11 | 1950-04-25 | Frederick E Henning | Earth auger |
| US2577333A (en) | 1947-09-02 | 1951-12-04 | Warren Tucker Iii | Golf club carrier |
| US3207242A (en) | 1963-10-11 | 1965-09-21 | Alaskaug Inc | Earth auger with integral mounting for cutting members |
| US3318182A (en) * | 1965-11-03 | 1967-05-09 | Textron Ind Inc | Self-thread-forming screw with drill point and method of making same |
| US3654690A (en) | 1970-07-02 | 1972-04-11 | Wise J Hardin | Method for removing broken studs |
| US4504392A (en) | 1981-04-23 | 1985-03-12 | Groteke Daniel E | Apparatus for filtration of molten metal |
| USD294584S (en) | 1985-03-07 | 1988-03-08 | Ok-Lica Aps | Mixing device for an ice cream machine |
| JPH0135055Y2 (en) * | 1985-07-26 | 1989-10-25 | ||
| US4688315A (en) | 1986-05-28 | 1987-08-25 | Jannke Thomas E | Screw extractor and method of using same |
| US4892429A (en) | 1987-08-03 | 1990-01-09 | Giannuzzi Louis | Roof anchor and stress plate assembly |
| US5358209A (en) | 1993-06-22 | 1994-10-25 | Ward William H | Anchoring device |
| US5408788A (en) | 1993-08-27 | 1995-04-25 | Hubbell Incorporated | Hollow hub helical earth anchor with improved earth penetrating spade/pilot point |
| US5575122A (en) | 1995-11-22 | 1996-11-19 | Hubbell Incorporated | Earth screw anchor assembly having enhanced penetrating capability |
| US5607261A (en) | 1995-11-29 | 1997-03-04 | Hubbell Incorporated | Clamshell power installed screw anchor |
| US5820319A (en) | 1996-01-16 | 1998-10-13 | Hull; Harold L. | Auger bit having a replaceable tip |
| US5718153A (en) * | 1996-06-07 | 1998-02-17 | Borden; Brian P. | Implement to quickly and cleanly remove a cork from a wine bottle |
| US5794727A (en) | 1996-10-25 | 1998-08-18 | Murray; Richard P. | Earth remediation auger |
| DE19721766A1 (en) | 1997-05-24 | 1998-11-26 | Hasan Javanbakhsh | Threaded part removal system |
| USD398363S (en) | 1997-08-20 | 1998-09-15 | Lobue Paul | Umbrella anchor |
| GB2330107A (en) * | 1997-10-08 | 1999-04-14 | Dennis William Cackett | Wall plug extracting tool |
| DE69823473T2 (en) | 1997-11-18 | 2005-04-07 | Bridgestone Corp. | Ceramic filters, filtering devices and methods of filtering molten metals |
| US6032880A (en) | 1998-06-04 | 2000-03-07 | Verrills; Robert H. | Ground spike for a sun umbrella |
| US6321861B1 (en) | 1999-06-15 | 2001-11-27 | Henry S. Leichter | Auger |
| US6168101B1 (en) | 1999-09-28 | 2001-01-02 | Premark Feg L.L.C. | Stainless steel chopper/mixer-grinder worm having improved resistance to fatting |
| GB2359039A (en) * | 2000-02-10 | 2001-08-15 | Michael Edwards | Wall plug remover |
| US6412235B1 (en) | 2000-09-08 | 2002-07-02 | Joseph T. Pylant | Removable screw-type, in-ground anchor device |
| GB2380236B (en) | 2001-09-29 | 2005-01-19 | Rolls Royce Plc | A wall structure for a combustion chamber of a gas turbine engine |
| US6817810B2 (en) | 2002-12-03 | 2004-11-16 | Robert L. Jones | Piering device with adjustable helical plate |
| US6963026B2 (en) | 2003-02-07 | 2005-11-08 | Bob Brennan | Ground rod |
| US8192123B2 (en) | 2003-10-10 | 2012-06-05 | Illinois Tool Works Inc. | Drywall fastener |
| USD521532S1 (en) * | 2004-03-30 | 2006-05-23 | Kubota Corporation | Combined hood and front grill portion of an agricultural tractor |
| USD518286S1 (en) | 2004-10-25 | 2006-04-04 | Luigi Fernando Milone | Fixing pointer for beach umbrella |
| DE202005005708U1 (en) * | 2005-04-08 | 2005-06-30 | Wyssmann, Max | Tool e.g. for removing shaft sealing ring, has bar with driver and hammer adjustably stored on bar into rotary shaft and driver is designed as cutting screw |
| USD546167S1 (en) | 2005-06-09 | 2007-07-10 | Noethe Robert W | Anchoring device for securing boats to shore |
| GB2428619A (en) | 2005-07-23 | 2007-02-07 | Pyrotek Inc | Extraction device |
| USD549088S1 (en) | 2005-10-26 | 2007-08-21 | Hangman Products, Inc. | Self-locating wall fastener |
| US7309198B1 (en) | 2005-11-28 | 2007-12-18 | Brown David J | Reusable threaded tie down |
| USD594041S1 (en) | 2007-05-22 | 2009-06-09 | Chin Hou Lin | Drill head for wall anchor device |
-
2005
- 2005-07-23 GB GB0515153A patent/GB2428619A/en not_active Withdrawn
-
2006
- 2006-06-19 ES ES06744254T patent/ES2350705T3/en active Active
- 2006-06-19 AT AT06744254T patent/ATE478265T1/en not_active IP Right Cessation
- 2006-06-19 US US11/995,472 patent/US8112864B2/en not_active Expired - Fee Related
- 2006-06-19 CN CN2006800192861A patent/CN101203682B/en not_active Expired - Fee Related
- 2006-06-19 DE DE602006016293T patent/DE602006016293D1/en active Active
- 2006-06-19 EP EP06744254A patent/EP1910689B1/en not_active Not-in-force
- 2006-06-19 WO PCT/GB2006/002232 patent/WO2007012795A1/en active Application Filing
- 2006-06-19 BR BRPI0610384-7A patent/BRPI0610384A2/en not_active Application Discontinuation
- 2006-06-19 CA CA002614535A patent/CA2614535A1/en not_active Abandoned
-
2008
- 2008-01-21 ZA ZA200800586A patent/ZA200800586B/en unknown
- 2008-02-22 NO NO20080964A patent/NO20080964L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| US8112864B2 (en) | 2012-02-14 |
| DE602006016293D1 (en) | 2010-09-30 |
| GB2428619A (en) | 2007-02-07 |
| ZA200800586B (en) | 2008-12-31 |
| BRPI0610384A2 (en) | 2010-06-15 |
| EP1910689B1 (en) | 2010-08-18 |
| EP1910689A1 (en) | 2008-04-16 |
| WO2007012795A1 (en) | 2007-02-01 |
| CN101203682B (en) | 2011-01-12 |
| US20080313876A1 (en) | 2008-12-25 |
| ATE478265T1 (en) | 2010-09-15 |
| NO20080964L (en) | 2008-02-22 |
| GB0515153D0 (en) | 2005-08-31 |
| ES2350705T3 (en) | 2011-01-26 |
| CN101203682A (en) | 2008-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1910689B1 (en) | Extraction device for use when extracting a ceramic foam filter | |
| CA2857123C (en) | Controlled electrolytic degradation of downhole tools | |
| CA2244217A1 (en) | Screw for insertion into a bone and tool for removing this screw | |
| EP2201147B1 (en) | Extraction device | |
| JP2002531283A (en) | Pellet manufacturing device with cutting rotor | |
| EP2138078B1 (en) | Water tank and connectable separately composed filter cartridge connection element | |
| EP3725262A1 (en) | Dental deflasking method and casting mould | |
| EP2739927B1 (en) | Device for refining metal melts | |
| KR101794569B1 (en) | Implant extraction method and trephine drill for facilitating the extraction | |
| DE3716920A1 (en) | Gas bubble system with gas break-through protection means | |
| US20070269497A1 (en) | Chemical stick with soluble stabilizer | |
| WO2015173604A1 (en) | Matrix riser breaker insert | |
| JP3669662B2 (en) | Connection structure of graphite electrode for electric furnace | |
| CN212857990U (en) | Nut breaking and cutting device | |
| CN210632731U (en) | Lower die structure for preventing waste material from blocking hole | |
| CN204246895U (en) | A kind of filter press filter cake cutter | |
| CN216039355U (en) | Zirconia part polishing particle with special structure | |
| WO2000073240A1 (en) | Silicon nitride materials and components made therefrom for processing molten light metal masses | |
| US3058735A (en) | Tapping rod with lime coating | |
| DE3134159A1 (en) | Method for the transportation of solidified cast shapes and its application | |
| KR0169203B1 (en) | Filter pore structure of waste water treatment apparatus | |
| CN109540638A (en) | A method of the fixed animal tissue of wax is decomposed in cleaning | |
| KR100242913B1 (en) | Burr removing tool for small hole | |
| EP0359052A1 (en) | Gas flushing brick equipment for metallurgical melting melting vessels. | |
| JP6215687B2 (en) | Rotating body for molten metal stirring and molten metal processing apparatus provided with the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |