GB2289101A - Wall plugs having wings - Google Patents

Wall plugs having wings Download PDF

Info

Publication number
GB2289101A
GB2289101A GB9408592A GB9408592A GB2289101A GB 2289101 A GB2289101 A GB 2289101A GB 9408592 A GB9408592 A GB 9408592A GB 9408592 A GB9408592 A GB 9408592A GB 2289101 A GB2289101 A GB 2289101A
Authority
GB
United Kingdom
Prior art keywords
plug
plane
bore
ridges
base
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Withdrawn
Application number
GB9408592A
Other versions
GB9408592D0 (en
Inventor
Robert Paul Anquetin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Black and Decker Inc filed Critical Black and Decker Inc
Priority to GB9408592A priority Critical patent/GB2289101A/en
Publication of GB9408592D0 publication Critical patent/GB9408592D0/en
Publication of GB2289101A publication Critical patent/GB2289101A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B13/00Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/12Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like
    • F16B13/124Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like fastened by inserting a threaded element, e.g. screw or bolt
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B13/00Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/02Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose in one piece with protrusions or ridges on the shaft

Abstract

In a wall plug having a body portion (12) and two fluted legs (36, 38) separated by zig-zag slots (20), wings (40, 42) are hinged to the legs (36, 38) and are accommodated in recesses (48) in the legs (36, 38) when deflected inwards during insertion of the plug, a line joining the ends of the wings (40, 42) being co-incident with the ends of the slots (20). The wings (40, 42) press against the rear of a hollow wall (not shown) when the legs (36, 38) are splayed by a screw in the bore (24). Anti-rotation arms protrude into the bore (24) and have ridges (60). <IMAGE>

Description

WALL PLUGS HAVING WINGS This invention relates to plastics wall plugs also known as wall anchors and particularly to those comprising a head of substantially cylindrical configuration provided with an axial through-bore and a legs portion having at least one axial slit to form two or more legs.
In use, a hole is drilled in a masonry type product (i.e. a product which does not directly take a screw with any degree of security) and in the hole so-fdrmed the plug is inserted with the legs portion first. Usually the end of the head portion is arranged to lie flush with the surface of the product, although this is not critical.
A screw or other screw threaded fastener is then inserted in the bore of the head portion and turned until the threads begin to bite in the material of the plug. The bore might also be tapered inwardly to assist pick-up of the screw. It is only once the screw begins to bite that the cross-section of the screw and parts of the plug, in combination, begin to exceed the dimensions of the hole and so the plug starts to deform and grip the bore of the hole in the product, and the threads of the screw cut a strong thread in the plug.
In the leg portion of the plug the diameter of the bore tends to reduce and even disappear so that as the screw progresses it gets tighter and tighter in the bore in the product.
Ultimately the screw has progressed as far as required and it has a level of security in the product in question. It is an object of the present invention to improve that level of security, which it is known can be improved and is influenced by a number of different factors.
One such factor is the material of the product; another is the size of the hole, the plug and the screw; another is the material of the plug; and another is the design of the plug. By "security" is meant the difficulty with which the screw is simply pulled out of the product in which it, and the plug, is fixed. Needless to say, the greater that difficulty the more secure is the fixing.
We have developed several features of the design of a plug, of which the present invention is one, which together result in a plug which is comparable in performance with existing plugs constructed from polyamide materials such as Nylon when it is itself constructed from polypropylene, a material acknowledged to be significantly less expensive then polyamide materials but usually significantly less effective. Put another way, it is an object ofthe present invention to provide a plug which has improved security over similar known plugs in corresponding circumstances.
It is known to provide wall plugs with wings, that is to say, tabs connected to the legs portion which extend outwardly and backwardly towards said body portion so that, in use, they are pressed outwardly by their own resilience against the bore of the product and prevent the plug from rotating while a screw is first inserted.
Wall plugs of the type to which to which the present invention relates are intended for use in solid constructions, but many building materials are of hollow construction. It is of course well known that walls are often constructed from timber battens or studs faced with a board, usually of plaster. But often even bricks are relatively hollow or have large internal spaces of which the user may be unaware.
It is an object of the present invention to provide a wall plug of the type initially described which is suitable for use even in hollow construction product.
In accordance with the present invention there is provided a wall plug comprising: a body portion constructed as a substantially cylindrical body having an axial through-bore; a legs portion connected to said body portion and comprising two legs split along a first plane; and two wings formed on said leg portions in a plane substantially perpendicular said first plane, each wing being connected to a respective leg along a hinge line and each wing extending outwardly and backwardly towards said body portion, recesses in said body plug being provided to house said wings within the general confines of the plug when said wings are bent towards the plug about said hinge line, characterised in that the split along said first plane is not straight, in that the split on one side of the plug is substantially the image of the split on the other side of the plug and in that a line joining the free ends of the wings is substantially co-incident the conjunction of said body and leg portions of the plug.
It is very much preferred if the wall plug is also provided with arms in said body portion formed by U-shaped openings in said body portion, one on either side of said body portion, the arms having a dimension which extends into the bore of the plug so that the arms grip the bore of the product when a fastener is inserted in the plug.
This is of particular importance when the plug is intended for use in hollow construction product so that an effective grip close to the opening of the bore in the product is achieved.
However, it is the fact that the split between the legs is not merely planar that renders possible use of the plug according to the present invention in walls of hollow construction. The non-planar split ensures that, as the screw is inserted, the legs of the plug splay apart more than would be the case if they were planar. Also, in view of the fact that the wings connect to the legs below the conjunction between the legs portion and the body portion, the wings are pressed backwardly towards the body portion, and potentially against a rear internal surface of the hollow construction product around the bore therethrough, as the legs are splayed on introduction of the fastener.
The fastener will in most cases be a screw-threaded component such as a screw.
We have filed three co-pending applications simultaneously herewith under the titles "Wall plugs having anns," "Wall plugs having ridged arms" and "Wall plugs having anti-rotation arms." These each describe further features of the arms of wall plugs which further enhance their effectiveness and which, together with the present invention, result in a wall plug of particular effectiveness, even when used in hollow construction product. We have also filed simultaneously herewith an application under the title "Wall plugs with fluted legs." This application adds a further feature of a wall plug, although this is not relevant to the circumstances of the present invention but applies only when employed in solid construction product.
Preferably said arms lie in said first plane.
Preferably said dimension extending into the bore of said plug is greater along the sides of the arm than along a central axis of the arm. This ensures that a screw in the bore of the plug does not deflect the arms sideways while at the same time ensuring that the screw also remains central.
Thus the plug has legs which are prised apart by the screw and grip the bore of the product in one direction or plane, while the arms in the body portion are prised apart by the screw and grip the bore of the product in a perpendicular direction or plane. This serves to distribute the loads in the plug more evenly so that the product is capable of accepting greater loads. Consequently the plug can be designed to impose greater loads, and hence provide greater security, than would otherwise be possible.
Furthermore, by providing the arms in the same plane as the split then the split can be moulded in the plug in a two part mould (apart from a core pin for the bore) without the necessity of a further special insert. Indeed, the split can in this way be non-linear, and different on one side of the plug from the other.
Preferably said arms each comprise a base connected along a hinge line to said body portion said hinge line being closer to said leg portions than said base and said base is lying substantially parallel the axis of said througl1-bore, and transverse ridges are termed on said base, which ridges extend beyond said base in both a radial and a circumferential direction with respect to said axis.
Preferably, the extensions of the ridges radially and circumferentially meet at corners of the ridges, which corners are sharp.
The advantage felt by ridges fonned in this way as opposed to the teeth hitherto known in such arms, is that, a better grip is achieved in the bore of the product. This is because the ridges extend around the base of the ann and so have a circumferential component, as well as a radial component. Where those components meet it is much preferred that they do so at a point, or at least along a sharp line or corner, so that the point or corner can more effectively bite into the material of the product in which the wall plug is fitted.
Preferably, said ridges are so-arranged that they have an axial dimension to counteract rotational forces on the plug.
Preferably said ridges are curved so that their centres between their edges are nearer said leg portion than their edges.
Preferably said ridges are chevron-shaped.
The fact that the ridges have an axial dimension means that, when the anns are pressed into engagement with the bore of the product in question, the axial dimension is contrary to imposed torque on the wall plug as a screw is screwed into it so that rotation of the plug in the bore of the product, which defeats further insertion of the screw, can be effectively prevented.
Preferably, flutes are formed around said leg portions and said flutes on each leg are inclined backwards towards said body portion.
Said legs portion is preferably substantially cylindrical and each flute commences at or near said split on one side of the plug; extends backwardly around the plug until reaching a second plane perpendicular said first plane; and then extends forwardly until reaching near said split on the other side of the plug.
Each flute on each leg preferably comprises a V-shaped notch, one side of the notch lying in a third plane around the entire length of the notch, which third plane is inclined with respect to the axis of the plug and contains a line which is both perpendicular to said axis and contained in said first plane, said one side of the notch being further from said body than the other side.
Said other side of said notch is preferably part conical, intersecting said one side on an elliptical line in said third plane and centred on the axis of the plug.
The purpose of said inclined flutes is two fold. Firstly, because they provide an axial dimension to the known flutes, they serve an additional useful function as anti-rotation devices. That is to say, because the flutes are inclined, then rotation of the plug in the bore of the product cuts further material out of the bore and this provides a reaction force against rotation.
Secondly, the flutes are undercut by virtue of their inclination, at least in said second plane, and so provide a sharper edge in this region (where, indeed,) there is maximum force applied against the bore of the product by the legs as they attempt to splay as the fastener is inserted). This sharper edge means that the plug more easily cuts and grips the material of the product in which the plug is inserted and so a better grip, and a more secure fixing is achieved.
Despite being undercut, nevertheless the inclination of the flutes enables the plug to be constructed in a standard mould employed for these types of plug. That is to say, they are moulded by a two part mould, separating in said second plane, with a core pin for the bore of the plug.
The invention is further described hereinafter, by way of example, with reference to the accompanying drawings, in which: Figure 1 a is a perspective view of a wall plug according to the present invention Figures 1b and c are respectively a side view and a plan view of the plug of Figure 1 a, seen in the direction of the arrows b and c respectively in Figure la; Figures 2a and b are end views of the plug of Figure 1 a, seen in the direction of the arrows IIa and IIb respectively in Figure 1 a; Figure 3 is a section on the line III-III in Figure 1 c; Figure 4 is a side view of a core pin forming the bore of the plug of Figure 1; Figure 5 is a perspective view of a plug similar to that of Figure 1 but without arms; Figure 6 is a schematic illustration showing stages of use of the wall plug of Figure 1 in solid construction product; and Figure 7 is as Figure 6 but in hollow construction product.
In the drawings a wall plug or anchor 10 comprises a moulded plastics component having a body portion 12 and a legs portion 14.
The legs portion 14 forms a front end 16 of the plug, while the body portion forms a back end 18. The legs portion 14 is defined by a longitudinal slit 20 which terminates at a conjunction 22 between the body and leg portions.
A longitudinal bore 24 extends almost the entire length of the plug 10 from an opening 26 at the back end 18 to the front end 16.
The bore 24 is formed in a mould (not shown) by a core pin 28, the relevant part of which is shown in Figure 4. This has, and terms in the bore 24, a cylindrical body part 30, a sharply tapering conjunction part 32 and a barely tapering leg part 34.
The slit 20 communicates with the bore 24 from either side of the plug and is formed as a zig-zag with complementary zigs and zags on either side of the plug. The slit 20 on each side of the plug, and the bore 24 between, defines two legs 36,38 of the plug 10. The legs are entirely separate from one another apart from their mutual conjunction with the body portion 12 and a small, frangible tab 37 between them at the front end 16 of the plug.
Each leg 36,38 carries a wing 40,42 connected to each leg at a hinge line 44. Each wing arches outwardly from the plug and backwardly towards the body portion 12.
Each wing has teeth 46 on one edge but is flat on the other.
Moreover, in the conjunction 22 region of plug 10, there is provided recesses 48 adapted to receive and locate the wings 40,42 as explained further below.
The body portion 12 has two arms 50,52 formed by U-shaped openings 54 in the body portion 12 and communicating with the bore 24.
Each arm 50,52 comprises a base 58 which connects to the plug at hinge line 56 and extends backwards away from the legs portion 14. The base has ridges 60 which are chevron-shaped, pointing forwards, and which extend from the base, not only radially, but also laterally, or rather circumferentially, into the opening 54. The ridges have chamfered front faces 62 which meet the circumferential parts of the ridges 60 at sharp corners 64.
Each arm 50,52 has a dimension 66 (see Figures 2a and 3) which extends into the bore 24 of the plug. The dimension 66 is shaped by an indentation 68 of the core pin 28 to have a concave curvature approximately centred on the long axis 100 the plug 10.
The plug 10 has a first plane 70 defined by the slit 20 and which corresponds with the section line III - III and the plane of view in Figure 3. The arms 50,52 are in the first plane 70. A second plane 72 contains the axis 100 and lies perpendicular the first plane 70.
The wings 40,42 lie substantially in the second plane 72, the flat edges of the wings lying in said plane. The second plane also defines the break line between the two mould parts (not shown) which are used to make the plug 10.
The body portion 12 is completed by four fins 80.
The legs 36,38 are each provided with flutes 82 which are each approximately semi-circular extending around each leg from the slit 20 on one side to the slit on the other side.
The flutes on each leg are inclined backwardly and comprise, in section, V-shaped notches. On leg 36, one side 84 of each notch lies in one of a series of parallel third planes (for example, plane 86 in Figure lc) which planes are inclined with respect to the axis 100 of the plug 10. The first plane 70 and third plane 86 intersect along a line (88 in Figure 2a) which is perpendicular to axis 100 and which is contained in the second plane 72. The notches on leg 38 correspond, but here the "third" plane 86 is inclined in the other direction with respect to the axis 100.
The other side 90 of the V-shaped notches terming flutes 82 are part conical and meet the sides 84 along an elliptical line 92, centred on the axis 100, at the base of each flute.
Thus although the flutes 82 are inclined and are undercut, at least in the second plane 72, they are capable of being formed in a two-part mould separating in the second plane 72 in the direction of line 88.
Figure 5 of the drawings shows a different embodiment of the plug 10 in which the arms 50,52 are not employed.
Figures 6 and 7 of the drawings show the mode of operation of the plug 10 in solid construction product 110 and hollow construction product 120 respectively. The following description applies to both modes unless otherwise stated.
The first step a) is to drill a hole in the product: a blind bore 112 in the solid material 110 and a through bore 114 in the hollow material 120. The hollow material 120 may be sheet material, as shown, although it may equally comprise a cavity in, for example, an aerated or hollow brick.
In step b), the plug 10 is inserted in the bore 112,114. The diameter of the bore 112,114 should be substantially the same as the diameter of the plug. In step c), the plug is fully inserted, possibly with the assistance of a hammer 113. In either case, the wings 40,42 are compressed against the plug body 10 and housed within the recesses 48 provided therefor. However, even when received in the recesses, the teeth 46 on each wing stand proud of the cylindrical surface of the plug in the conjunction region 22. These teeth thus bite into the material of the product and are pressed into engagement with the bore 112,114 by the resilience of the plastics material of the wings 40,42.
In the case of the hollow wall, when the plug is fully inserted, the wings open out again behind the hollow construction product 120 and rest against, or perhaps slightly away from, rear surface 116, depending on the thickness ofthe product 120.
Also during insertion at step c), the arms 50,52 are in both cases inwardly deflected, because they stand proud of the cylindrical surface of the body portion 12, in particular the corners 64 of the ridges 60. The chevron shape of the ridges 60 assists insertion by spreading and removing any loose material in the bores 112,114.
When the arms 50,52 are inwardly deflected, then the dimensions 66, already intruding into the bore 24, further enter this space and between them form a receptacle, by virtue of their concave surface, for a screw fastener.
While a screw is shown, any form of threaded fastener having a coarse thread, so long as it is appropriately dimensioned, will suffice, although even a nail will usually provide some form of fixing.
In step d), an article 118 to be secured to the product is offered up to the bore 112,114 and plug therein. A screw 122 is then inserted and immediately engages between the dimensions 66 of the anns 50,52. The diameter of the screw is arranged so that as it passes through the plug, the arms 50,52 are forced radially outwards.
The curvature of the dimensions 66 both keep the screw central on the axis 100 and prevent, or at least subdue, any tendency of the arms to be deflected sideways.
At this time, the ridges 60 on the outside of the anns 50,52 bite further into the material of the product 110,120 (depending on the material of the product and, indeed, of the plug). In hard material this biting may not be very much, but in such material that is not so important because the dimensions of the plug, hole and screw would be selected such that, in combination, all three form a tight fit in the bore. Even if this were not the case, or where the material is relatively soft, then two features of the arms 50,52 mitigate against the natural tendency of the plug to rotate in the bore 112,114 as the screw 122 is turned in the plug 10.
The first feature is the corners 64 on the anns 50,52 provided by the fact that the ridges 60 extend around the base 58 of each arm.
The corners 64 and sides 65, present a sharp point which is driven into the material of the product when the screw is inserted and which bite in further if the plug should start to turn.
The second feature is the fact that the ridges 60 are chevron-shaped providing an axial dimension which therefore must cut out more material as the plug rotates. Since the product would resist material being removed, the chevron ridges act as a brake against rotation.
There is, of course, a conventional anti-rotation element provided in the plug 10 by the fins 80 giving the plug a substantially square section at its end 18.
Referring only to the solid construction product 110 of Figure 6 for the moment, there are two further anti-rotation elements of the plug 10. First are the wings 40,42 acting here in a conventional manner and in which the teeth 46 are arranged to bite into the material in a tightening direction of the screw 122.
Secondly, the flutes 82 in the legs 36,38 are inclined as described above. Like the chevrons 60 these give the flutes an axial dimension braking any rotation in the same manner.
The fact that the split 20 is non-linear and that the "zigs" and "zags" alternate with one another on either side of the plug, ensures that the screw stays central and is not allowed to get deflected sideways where it would have to grip against the frangible material of the product and where a secure fixing could not be achieved.
However, the non-linear, zig-zag split has a further function in the hollow construction product application of Figure 7.
Because of the zig-zag split 20, the legs become splayed apart, when there is nothing to stop them doing so, much more than if there was a linear split. This is because the legs ride up, as it were, on the first "zig" 21 on one side of each leg. This presses the wings 40,42 into tight engagement with the rear surface 116 of the hollow product 120 and the result is a secure fixing. That is to say, the arms 50,52 are gripping the bore 114 so the plug is secure there.
Secondly, the legs 36,38 are splayed wide apart behind the product 120 which itself adds security and makes difficult the withdrawal of the screw and plug as a unit; and, thirdly the wings 40,42 pressed against the back of the product 120 provides a further anchor against withdrawal.
Returning to the solid construction product 110, the plug 10 provides a very secure fixing against unitary pull-out for several reasons. The arms 50,52 act as they do in the hollow construction with the chevrons 60 now resisting pull out. Instead of the pointed chevrons and sloping front faces 62 facilitating insertion, the open rear gapes of the chevron 60 and the sharp edges at the top of the faces 62, not to mention the corners 64 digging into the material, all conspire to make withdrawal difficult without prior removal of the screw.
In blind bores, the wings do offer a certain amount of resistance to withdrawal but this is conventional. However, the inclined flutes 82 which provide undercut barbs in the surface of the plug, in the very region (i.e. plane 72) where most of the pressure exerted by the screw attempting to splay the legs 36,38 is felt, offers further and significant resistance to pull-out.
Finally, in order to balance the forces acting on the product by the wall plug once a screw is inserted and to spread the load in a more even radial direction, the arms 50,52 are arranged in a plane (plane 70) perpendicular to the plane (plane 72) of the legs 36,38.
This also makes it possible to mould the plug in a two-part mould with only the core pin 28 required as well. The arms 50,52, wings 40,42 and split 20, not to mention the inclined flutes 82 and fins 80, are all termed by contours of the two-part mould which can be separated without any unusual movements or prior withdrawals of components. The plugs do need to be sprung off the core pins by virtue of the dimensions 66 filling the indentations 68 in the core pin.
However, this is not difficult as the dimension 66 is gently sloped and the arms 50,52 can easily flex about hinge 56.
The end result of these various features is wall plug of enhanced performance but which nevertheless can be constructed in the least expensive method.

Claims (15)

1. A wall plug comprising: a body portion constructed as a substantially cylindrical body having an axial through-bore; a legs portion connected to said body portion and comprising two legs split along a first plane; and two wings fonned on said leg portions in a plane substantially perpendicular said first plane, each wing being connected to a respective leg along a hinge line and each wing extending outwardly and backwardly towards said body portion, recesses in said plug being provided to house said wings within the general confines of the plug when said wings are bent towards the plug about said hinge line, characterised in that the split along said first plane is not straight, in that the split on one side of the plug is substantially the image of the split on the other side of the plug and in that a line joining the free ends of the wings is substantially co-incident the conjunction of said body and leg portions of the plug.
2. A wall plug as claimed in claim 1, in which said body portion has arms fonned by U-shaped openings in said body portion, one on either side of said body portion, the arms having a dimension which extends into the bore of the plug so that the arms grip a bore of a product in which the plug is to be fixed when a fastener is inserted in the plug.
3. A wall plug as claimed in claim 2, in which said arms lie in said first plane.
4. A wall plug as claimed in claim 2 or 3, in which said dimension extending into the bore of said plug is greater along the sides of the arm than along a central axis of the arm.
5. A wall plug as claimed in any of claims 2 to 4, in which said arms each comprise a base connected along a hinge line to said body portion said hinge line being closer to said leg portions than said base and said base lies substantially parallel the axis of said through-bore, and in which transverse ridges are formed on said base, which ridges extend beyond said base in both a radial and a circumferential direction with respect to said axis.
6. A wall plug as claimed in claim 5, in which the extensions of the ridges radially and circumferentially meet at corners of the ridges, which corners are sharp.
7. A wall plug as claimed in any of claims 2 to 4, in which said arms each comprise a base connected along a hinge line to said body portion said hinge line being closer to said leg portions than said base and said base is lying substantially parallel the axis of said through-bore, and in which transverse ridges are fonned on said base, which ridges are so-arranged that they have an axial dimension to counteract rotational forces on the plug.
8. A wall plug as claimed in claim 7, in which said ridges are curved so that their centres between their edges are nearer said leg portion than their edges.
9. A wall plug as claimed in claim 8, in which said ridges are chevron-shaped.
10. A wall plug as claimed in claim 5 or 6 in combination with a wall plug as claimed in claim 7, 8 or 9.
11. A wall plug as claimed in any preceding claim, in which flutes are formed around said leg portions and in which the flutes on each leg are inclined backwards towards said body portion.
12. A wall plug as claimed in claim 11, in which said legs portion is substantially cylindrical and each flute commences at or near said split on one side of the plug; extends backwardly around the plug until reaching a second plane perpendicular said first plane; and then extends forwardly until reaching near said split on the other side of the plug.
13. A wall plug as claimed in claim 12, in which each flute on each leg comprises a V-shaped notch, one side of the notch lying in a third plane around the entire length of the notch, which third plane is inclined with respect to the axis of the plug and contains a line which is both perpendicular to said axis and contained in said first plane, said one side of the notch being further from said body than the other side.
14. A wall plug as claimed in claim 13, in which said other side of said notch is part conical, intersecting said one side on an elliptical line in said third plane and centred on the axis of the plug.
15. A wall plug substantially as described with reference to Figures 1 to 3, 6 and 7, and Figure 5 of the accompanying drawings.
GB9408592A 1994-04-29 1994-04-29 Wall plugs having wings Withdrawn GB2289101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9408592A GB2289101A (en) 1994-04-29 1994-04-29 Wall plugs having wings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9408592A GB2289101A (en) 1994-04-29 1994-04-29 Wall plugs having wings

Publications (2)

Publication Number Publication Date
GB9408592D0 GB9408592D0 (en) 1994-06-22
GB2289101A true GB2289101A (en) 1995-11-08

Family

ID=10754372

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9408592A Withdrawn GB2289101A (en) 1994-04-29 1994-04-29 Wall plugs having wings

Country Status (1)

Country Link
GB (1) GB2289101A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004015284A1 (en) * 2002-08-08 2004-02-19 Turner Intellectual Property Limited A fixing plug
WO2007082374A1 (en) * 2006-01-17 2007-07-26 Cobra Fixations Cie Ltee - Cobra Anchors Co. Ltd. Plastic anchor for drywall, plaster, brick, concrete, etc.
DE102007058773A1 (en) * 2007-12-06 2009-06-10 Fischerwerke Gmbh & Co. Kg insulation holders
AU2013200146B2 (en) * 2006-01-17 2015-06-18 Cobra Fixations Cie. Ltee - Cobra Anchors Co. Ltd. Plastic anchor for drywall, plaster, brick, concrete, etc

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB975957A (en) * 1960-05-14 1964-11-25 Fischer Arthur Spreadable plug for fixing purposes
GB1107814A (en) * 1964-05-22 1968-03-27 Fischer Artur A wall plug arrangement
GB1299662A (en) * 1969-02-24 1972-12-13 Langensiepen Kg M Expanding plastics wall plug
GB1352075A (en) * 1970-06-19 1974-05-15 Glarex Ag Screw-receivering plugs
US4210057A (en) * 1976-10-06 1980-07-01 Upat Gmbh & Co. Anchoring dowel with detent lugs
GB1584372A (en) * 1976-07-07 1981-02-11 Schefer A Expansion fixing plug
GB1584409A (en) * 1976-09-29 1981-02-11 Fischer Artur Fastening device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB975957A (en) * 1960-05-14 1964-11-25 Fischer Arthur Spreadable plug for fixing purposes
GB1107814A (en) * 1964-05-22 1968-03-27 Fischer Artur A wall plug arrangement
GB1299662A (en) * 1969-02-24 1972-12-13 Langensiepen Kg M Expanding plastics wall plug
GB1352075A (en) * 1970-06-19 1974-05-15 Glarex Ag Screw-receivering plugs
GB1584372A (en) * 1976-07-07 1981-02-11 Schefer A Expansion fixing plug
GB1584409A (en) * 1976-09-29 1981-02-11 Fischer Artur Fastening device
US4210057A (en) * 1976-10-06 1980-07-01 Upat Gmbh & Co. Anchoring dowel with detent lugs

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004015284A1 (en) * 2002-08-08 2004-02-19 Turner Intellectual Property Limited A fixing plug
CN100378351C (en) * 2002-08-08 2008-04-02 特纳知识产权有限公司 Fixing plug
WO2007082374A1 (en) * 2006-01-17 2007-07-26 Cobra Fixations Cie Ltee - Cobra Anchors Co. Ltd. Plastic anchor for drywall, plaster, brick, concrete, etc.
US7600956B2 (en) 2006-01-17 2009-10-13 Cobra Anchors Co. Ltd. Plastic anchor for drywall, plaster, brick and concrete
AU2013200146B2 (en) * 2006-01-17 2015-06-18 Cobra Fixations Cie. Ltee - Cobra Anchors Co. Ltd. Plastic anchor for drywall, plaster, brick, concrete, etc
CN101400903B (en) * 2006-01-17 2018-08-14 眼镜蛇紧固件股份有限公司 Plastics anchor log for dry type wall, gypsum, brick, concrete etc.
CN108953328A (en) * 2006-01-17 2018-12-07 眼镜蛇紧固件股份有限公司 Plastics anchor log for dry type wall, gypsum, brick, concrete etc.
US10294975B2 (en) 2006-01-17 2019-05-21 Cobra Fixations Cie Ltee—Cobra Anchors Co. Ltd. Plastic anchor for drywall, plaster, brick and concrete
DE102007058773A1 (en) * 2007-12-06 2009-06-10 Fischerwerke Gmbh & Co. Kg insulation holders

Also Published As

Publication number Publication date
GB9408592D0 (en) 1994-06-22

Similar Documents

Publication Publication Date Title
US5224805A (en) Anchoring plug
EP1817504B1 (en) Self-drilling hollow wall anchor
JP3930960B2 (en) Threaded anchor
US6186716B1 (en) Anchor bolt
US4861206A (en) Straddling plug
JPH05295728A (en) Anchor
WO2007005345A2 (en) System and methods for wall and ceiling fastening
CA2686983A1 (en) Anchoring fastener with movable binding member
CH631521A5 (en) Anchoring socket.
CA2453374C (en) Striking plug
JPH09112515A (en) Machine screw fixing auxiliary tool
GB2289101A (en) Wall plugs having wings
EP0679814B1 (en) Wall plugs having fluted legs
EP0684395B1 (en) Wall-plugs having anti-rotation arms
CH622861A5 (en)
JP2750102B2 (en) Combination of screw and screw fixing aid
GB2289103A (en) Wall plugs having arms
GB2289102A (en) Wall plugs having ridged arms
JP4031125B2 (en) Threaded anchor
EP1055074B1 (en) Self-cutting board anchor
JP2855059B2 (en) Screw fixing aid to concrete etc.
KR20000012841U (en) Wall fixing bolt device
JPH0729308U (en) Anchor bolt
DD139444A1 (en) Spreading pins as fastening element for objects to be raised on waeces
JP2002180549A (en) Anchor gear

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)