EP0920366A1 - Device for removing wall plugs or dowels - Google Patents
Device for removing wall plugs or dowelsInfo
- Publication number
- EP0920366A1 EP0920366A1 EP98923051A EP98923051A EP0920366A1 EP 0920366 A1 EP0920366 A1 EP 0920366A1 EP 98923051 A EP98923051 A EP 98923051A EP 98923051 A EP98923051 A EP 98923051A EP 0920366 A1 EP0920366 A1 EP 0920366A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hole
- plug
- fluid
- fluid jet
- dowels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000004033 plastic Substances 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 239000012768 molten material Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B31/00—Hand tools for applying fasteners
Definitions
- the present invention relates to a device for removing wall plugs which are commonly used as seats for housing screws or hooks inside of walls. More particularly the device according to the present invention provides for a simple and effective solution for quickly removing wall plugs made of a plastic material from holes made in walls and/or surfaces of any material, without damaging the surface on which the hole has been drilled.
- wall plugs or dowels to be housed inside of holes drilled in walls and/or surfaces of different materials is well known in the art, said plugs allowing screws or hooks inserted into said holes to be supported in a reliable way.
- the plugs may be broken inside of the hole, before inserting the screw or during its insertion, and this owing to a manufacturing fault or following to a wrong movement by the operator.
- the device according to the present invention aims to obviate the disadvantages and drawbacks as described and to provide, thus, for a solution which is simple, cheap and easy to be used by anybody.
- a device for removing plugs made of plastic material generates a fluid jet which is advantageously hot and concentrated, said fluid jet being directly applied inside of the hole housing the plug to be removed.
- said device may have a gun or injector shape, what allows the necessary precision during the application being achieved.
- the fluid jet e.g. an air jet
- the fluid jet may be emitted at a relatively high temperature in order to soften the plastic material which constitutes the plug.
- the plug may effortless be removed from the hole, e.g. by means of a wrench or a similar to.
- the plugs are made of nylon® which has melting temperature of about 250°C.
- the fluid jet may be emitted at a temperature lower than that threshold, though high enough for allowing the plastic material being softened.
- said fluid jet has to be concentrated in order not to disperse the heat in the environment.
- the fluid used by the device is constituted by hot air which causes the plug to be softened inside of the hole.
- the air temperature is set at a higher level, in order to cause the melting of the plug.
- the device according to the invention (which, as mentioned above, has a gun shape) is provided with means for emitting the air jet necessary for melting the plug, as well as with means for sucking the molten material from the hole.
- said device is provided with a motor which is driven at two different speeds in order to generate a hot air jet at two distinct temperatures, i.e. softening and melting temperatures; in this case the operator may select the best operating mode according to his hints.
- the motor of said device is realized in such a way as to generate the hot air jet when it is turning in a given direction, while it acts as a sucker for removing the molten material and any possible deposits when turning in the opposite direction.
- a suitable tank is provided in order to collect the molten material as sucked from the hole.
- the device according to the present invention is provided, at one end thereof, with a cap which is suitably shaped in order to enclose the hole inside of its contour when the cap is placed against the wall surface.
- This cap performs a first function of addressing towards the hole the fluid jet, as well as a second function (while the device is being used as sucker) of avoiding that molten material and/or deposits soil the wall surface.
- the fluid may constituted by vapour at the softening and/or melting temperature of the plug material .
- the hot fluid jet is replaced by a suitable solvent or by an acid solution in order to remove tha plug.
- reference sign 10 indicates a device according to the present invention.
- Said device 10 comprises a means 11, e.g. a gun shaped element, suitable for generating a concentrated hot air jet 12 to be directed inside of hole 13 drilled in wall 14, said hole 13 housing a plug or dowel 15 to be removed.
- a means 11 e.g. a gun shaped element, suitable for generating a concentrated hot air jet 12 to be directed inside of hole 13 drilled in wall 14, said hole 13 housing a plug or dowel 15 to be removed.
- the air jet is emitted at a temperature which is selected in order to soften the plug material .
- the softened plug may then be easily catched and extracted, e.g. by means of a wrench.
- the figure shows a cap 16 which, when placed on wall 14, encloses hole 13 within its contour, thereby directing the fluid jet on the plug to be removed and avoiding that molten material and/or deposits coming out of the wall soil the wall surface.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Stereophonic System (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
- Display Devices Of Pinball Game Machines (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1997VR000041A IT1304950B1 (it) | 1997-05-20 | 1997-05-20 | Dispositivo per la rimozione di tasselli ad espansione |
| ITVR970041 | 1997-05-20 | ||
| PCT/IT1998/000125 WO1998052722A1 (en) | 1997-05-20 | 1998-05-20 | Device for removing wall plugs or dowels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0920366A1 true EP0920366A1 (en) | 1999-06-09 |
Family
ID=11428350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98923051A Withdrawn EP0920366A1 (en) | 1997-05-20 | 1998-05-20 | Device for removing wall plugs or dowels |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0920366A1 (enrdf_load_stackoverflow) |
| AU (1) | AU7547698A (enrdf_load_stackoverflow) |
| IT (1) | IT1304950B1 (enrdf_load_stackoverflow) |
| WO (1) | WO1998052722A1 (enrdf_load_stackoverflow) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3987954A (en) * | 1975-10-10 | 1976-10-26 | Pace Incorporated | Solder removal device |
| US4256333A (en) * | 1977-03-10 | 1981-03-17 | American Hospital Supply Corporation | Solvent-bonded joint |
| SU1211082A1 (ru) * | 1983-12-21 | 1986-02-15 | Всесоюзный Научно-Исследовательский И Технологический Институт Монтажа,Эксплуатации И Ремонта Машин И Оборудования Животноводческих И Птицеводческих Ферм | Горелка дл сварки полимерных материалов газообразным теплоносителем |
| JPH07299872A (ja) * | 1994-04-28 | 1995-11-14 | Sekitei Beikoku:Kk | 部品の接合方法および分解方法 |
| DE29501938U1 (de) * | 1995-01-09 | 1995-05-24 | Wolf, Armin, 44628 Herne | Vorrichtung zum Entfernen von Dübeln aus Bohrungen |
-
1997
- 1997-05-20 IT IT1997VR000041A patent/IT1304950B1/it active
-
1998
- 1998-05-20 WO PCT/IT1998/000125 patent/WO1998052722A1/en not_active Application Discontinuation
- 1998-05-20 EP EP98923051A patent/EP0920366A1/en not_active Withdrawn
- 1998-05-20 AU AU75476/98A patent/AU7547698A/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9852722A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1304950B1 (it) | 2001-04-05 |
| ITVR970041A1 (it) | 1998-11-20 |
| WO1998052722A1 (en) | 1998-11-26 |
| AU7547698A (en) | 1998-12-11 |
| ITVR970041A0 (enrdf_load_stackoverflow) | 1997-05-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19990222 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 20000512 |