WO1998052722A1 - Device for removing wall plugs or dowels - Google Patents
Device for removing wall plugs or dowels Download PDFInfo
- Publication number
- WO1998052722A1 WO1998052722A1 PCT/IT1998/000125 IT9800125W WO9852722A1 WO 1998052722 A1 WO1998052722 A1 WO 1998052722A1 IT 9800125 W IT9800125 W IT 9800125W WO 9852722 A1 WO9852722 A1 WO 9852722A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hole
- plug
- fluid
- fluid jet
- dowels
- Prior art date
Links
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)
- Management Or Editing Of Information On Record Carriers (AREA)
- Display Devices Of Pinball Game Machines (AREA)
- Stereophonic System (AREA)
Abstract
A device (10) suitable for removing plugs or dowels made of a plastic material comprises means (11) for directing a fluid jet (12) on a plug (15) housed inside of a hole (13) drilled in a surface (14). The fluid may be constituted by hot air, vapour or chemical substances.
Description
DEVICE FOR REMOVING WALL PLUGS OR DOWELS
********
TECHNICAL FIELD
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.
BACKGROUND ART
The use of 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.
However, while carrying out these operations 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.
Under these circumstances it is very difficult, and sometimes impossible, to remove said plug unless the hole is enlarged, thereby causing a damage to the wall surface.
Another inconvenience which may occur is constituted by a wrong evaluation by the operator, who may insert into the hole a plug having a wrong dimension and which completely fills said hole; in this case it is very difficult to remove the plug.
Moreover, it may happen that the screw breaks when being inserted into the plug and also in this case the removal operation can be difficult and cause serious damages to the wall surface. It may be noted that in some situations it is not possible to drill a hole in another position, since the corresponding screw should exactly be placed in the first position.
In this case there is only one option, which is constituted by widening the hole by means of normal tools such as a screw driver or a drill machine; however, the new hole will have a diameter larger than the previous hole and the plug will not fit into said new hole.
Consequently, the first hole has to be filled by means of concrete or stuccoworks before drilling a new hole, what causes time losses and high costs. DESCRIPTION OF THE INVENTION 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.
This is achieved by means of a device having the features disclosed in the main claim.
The dependent claims outline particularly advantageous forms of embodiment of the device according to the invention.
According to a first form of embodiment of the present invention, 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.
In order to enhance a comfortable and easy application of said jet inside of said hole, 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, may be emitted at a relatively high temperature in order to soften the plastic material which constitutes the plug.
In fact once the plug is sufficiently softened, it may effortless be removed from the hole, e.g. by means of a wrench or a similar to.
Generally, the plugs are made of nylon® which has melting temperature of about 250°C.
This means that the fluid jet may be emitted at a temperature lower than that threshold, though high enough for allowing the plastic material being softened.
Furthermore, said fluid jet has to be concentrated in order not to disperse the heat in the environment.
It may be noted that this operation may easily be carried out by anybody without causing any damage to the wall surface, nor efforts by the operator.
According to this form of embodiment of the invention the fluid used by the device is constituted by hot air which causes the plug to be softened inside of the hole.
According to another form of embodiment of the invention the air temperature is set at a higher level, in order to cause the melting of the plug. In this case 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.
By way of example 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.
According to a further form of embodiment 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.
According to this form of embodiment a suitable tank is provided in order to collect the molten material as sucked from the hole.
Furthermore, according to a form of embodiment 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.
According to a further form of embodiment of the present invention, the fluid may constituted by vapour at the softening and/or melting temperature of the plug material . According to another form of embodiment of the present invention, the hot fluid jet is replaced by a suitable solvent or by an acid solution in order to remove tha plug.
ILLUSTRATION OF DRAWINGS
Other features and advantages of the present invention will become apparent by reading the following description of a form of embodiment of the invention, given as a non-limiting example, with the help of the figure illustrated in the attached drawing, which shows a schematical side view of a device according to the present invention .
DESCRIPTION OF A FORM OF EMBODIMENT In the figure, 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.
The air jet is emitted at a temperature which is selected in order to soften the plug material .
In this way the softened plug may then be easily catched and extracted, e.g. by means of a wrench. Furthermore, 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.
Claims
1. Device (10) suitable for removing plugs or dowels made of a plastic material characterized in that it comprises means (11) for directing a fluid jet (12) on a plug (15) housed inside of a hole (13) drilled in a surface (14 ) .
2. Device (10) according to claim 1, characterized in that the fluid jet (12) has a temperature suitable for softening or melting the plug material .
3. Device (10) according to anyone of the preceding claims, characterized in that the fluid (12) is constituted by air.
4. Device (10) according to claim 1, characterized in that the fluid (12) is constituted by a solvent and/or an acid solution.
5. Device (10) according to claim 1 or 4, characterized in that it comprises a sucker suitable for removing the plug (15) and cleaning the hole (13) .
6. Device (10) according to claim 1 or 4 , characterized in that it comprises a tank for collecting molten material and/or deposits and/or solvents.
7. Device (10) according to claim 1 or 4, characterized in that it comprises a cap (16) for directing the fluid jet (12) and/or enhancing the transport of the deposits towards said tank.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98923051A EP0920366A1 (en) | 1997-05-20 | 1998-05-20 | Device for removing wall plugs or dowels |
| AU75476/98A AU7547698A (en) | 1997-05-20 | 1998-05-20 | Device for removing wall plugs or dowels |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1997VR000041A IT1304950B1 (en) | 1997-05-20 | 1997-05-20 | DEVICE FOR REMOVING EXPANSION DOWELS |
| ITVR97A000041 | 1997-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998052722A1 true WO1998052722A1 (en) | 1998-11-26 |
Family
ID=11428350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT1998/000125 WO1998052722A1 (en) | 1997-05-20 | 1998-05-20 | Device for removing wall plugs or dowels |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0920366A1 (en) |
| AU (1) | AU7547698A (en) |
| IT (1) | IT1304950B1 (en) |
| WO (1) | WO1998052722A1 (en) |
Citations (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 (en) * | 1983-12-21 | 1986-02-15 | Всесоюзный Научно-Исследовательский И Технологический Институт Монтажа,Эксплуатации И Ремонта Машин И Оборудования Животноводческих И Птицеводческих Ферм | Torch for welding polymeric materials with gaseous heat carrier |
| DE29501938U1 (en) * | 1995-01-09 | 1995-05-24 | Wolf, Armin, 44628 Herne | Device for removing dowels from bores |
| JPH07299872A (en) * | 1994-04-28 | 1995-11-14 | Sekitei Beikoku:Kk | Parts-connecting and-disassembling method |
-
1997
- 1997-05-20 IT IT1997VR000041A patent/IT1304950B1/en active
-
1998
- 1998-05-20 EP EP98923051A patent/EP0920366A1/en not_active Withdrawn
- 1998-05-20 WO PCT/IT1998/000125 patent/WO1998052722A1/en not_active Application Discontinuation
- 1998-05-20 AU AU75476/98A patent/AU7547698A/en not_active Abandoned
Patent Citations (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 (en) * | 1983-12-21 | 1986-02-15 | Всесоюзный Научно-Исследовательский И Технологический Институт Монтажа,Эксплуатации И Ремонта Машин И Оборудования Животноводческих И Птицеводческих Ферм | Torch for welding polymeric materials with gaseous heat carrier |
| JPH07299872A (en) * | 1994-04-28 | 1995-11-14 | Sekitei Beikoku:Kk | Parts-connecting and-disassembling method |
| DE29501938U1 (en) * | 1995-01-09 | 1995-05-24 | Wolf, Armin, 44628 Herne | Device for removing dowels from bores |
Non-Patent Citations (2)
| Title |
|---|
| DATABASE WPI Section Ch Week 8639, 9 October 1986 Derwent World Patents Index; Class A35, AN 257376, XP002077155 * |
| PATENT ABSTRACTS OF JAPAN vol. 096, no. 003 29 March 1996 (1996-03-29) * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0920366A1 (en) | 1999-06-09 |
| IT1304950B1 (en) | 2001-04-05 |
| ITVR970041A0 (en) | 1997-05-20 |
| AU7547698A (en) | 1998-12-11 |
| ITVR970041A1 (en) | 1998-11-20 |
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