GB2103749A - Screw-threaded socket for casting into concrete - Google Patents
Screw-threaded socket for casting into concrete Download PDFInfo
- Publication number
- GB2103749A GB2103749A GB08221126A GB8221126A GB2103749A GB 2103749 A GB2103749 A GB 2103749A GB 08221126 A GB08221126 A GB 08221126A GB 8221126 A GB8221126 A GB 8221126A GB 2103749 A GB2103749 A GB 2103749A
- Authority
- GB
- United Kingdom
- Prior art keywords
- collar
- socket
- tubular portion
- socket according
- intermediate portion
- 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- Withdrawn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
- 238000005266 casting Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000004033 plastic Substances 0.000 claims abstract description 6
- 229920003023 plastic Polymers 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000005755 formation reaction Methods 0.000 claims 2
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001296 Malleable iron Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4114—Elements with sockets
- E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
An internally screw-threaded socket for casting into concrete and other setting material comprises a rigid nut 1 provided with a flange 4, and encased in a sheath 2 of self- supporting plastics material. The first tubular portion 5 of the sheath 2 provides a guide for a bolt to be engaged with the nut 1. The second tubular portion 9 of the sheath 2 is closed at its end remote from the nut 1 and serves to allow the end of the bolt to project beyond the nut 1 and to collect debris which may fall into the socket when it is cast in position for use. To enhance its resistance to being pulled out of the material in which it is cast the socket may have an auxiliary anchorage device 14 of top-hat shape seating at its crown on the encased flange 4. <IMAGE>
Description
SPECIFICATION.
Internally screw-threaded socket adapted for casting into concrete and other setting materials
This invention relates to internally screwthreaded sockets which are adapted to be cast into concrete and other setting materials for use.
Such sockets are used, for example, for securing frame members, apparatus or machines in position on concrete floors or beds, or in respect to concrete structures, the sockets being engaged by bolts to secure the fixture. They may also be used in many other applications where fixing to a concrete, or other setting material, floor, member or other means is required.
Accurate and secure location of the sockets for use is normally essential.
A known form of socket which has been used for many years has been made as a casting of malleable iron and comprises a slab-like base portion and an integral, internally screw-threaded tubular portion standing centrally on the base portion. The base portion projects laterally away from the tubular portion and provides a secure anchorage for the socket in the concrete or other material in which it is cast for use. This form of socket is expensive to produce and few are now being made.
A cheaper form of socket has been produced which is made from a length of metal tubing. An upper end portion of the tubing is swaged down and internally screw-threaded to form the socket proper, and the remainder of the tubing is flattened and crimped. The crimping is intended to key with the concrete or other material in which the socket is cast for use and anchor the socket in place. In practice the anchorage provided by the crimped portion has not always been reliable.
It is the object of the present invention to provide a socket which is relatively cheap and easy to manufacture and reliable in use.
The present invention consists in an internally screw-threaded socket adapted to be cast into concrete and other setting material for use, comprising a rigid collar having an internally screw-threaded bore extending through it, and a sheath of self-supporting plastics material which comprises an intermediate portion which encases, or substantially encases, the collar and two tubular portions which extend from the intermediate portion at opposite ends of the collar, coaxially, and communicating internally, with the internally screw-threaded bore, a first one of the tubular portions being open at its end remote from the collar, a second one of the tubular portions being closed at its end remote from the collar, and the intermediate portion of the sheath projecting laterally outwardly beyond the first tubular portion.
The first tubular portion provides the entrance to the screw-threaded bore of the collar for a bolt or other externally screw-threaded member to be engaged with the bore. For use the socket is normally positioned so that the open-end of the first tubular portion is at or just proud of the level to which the concrete or other material is to be cast. The first tubular portion then prevents the wet concrete, or other material, from reaching the collar and fouling the internal screw-thread, and from blocking access to the collar. In addition by so positioning the first tubular portion the collar is located at the correct depth for when the socket is cast in position, so as to provide proper anchorage for the socket in the concrete or other material.It will be appreciated that the length of the first tubular portion will be determined by the particular use to which the socket is intended to be put, and may vary from one use to another.
Conveniently the first tubular portion is of circular, or substantially circular, cross-section but it may be of other cross-sectional shapes.
The second tubular portion is intended to allow room for the end of a bolt or other threaded member engaged with the threaded bore of the collar when the socket is in use to project beyond the collar. Also if debris should fall into the socket when it is cast in position for use the second tubular portion provides a receptacle for the debris away from the threaded bore of the collar. As the end of the second tubular portion remote from the collar is closed, wet concrete or other material cannot enter the socket from that end during casting. The second tubular portion may be of substantially similar cross-section to the first tubular portion or it may be of a different crosssection.
As indicated above, the sheathed collar serves also to anchor the socket in the concrete or other material in which it is cast for use. The lateral projection of the intermediate portion of the sheath outwardly beyond the first tubular portion enables a secure anchorage to be obtained. The further the projection the better the anchorage that can be achieved. Preferably the lateral projection, or the greatest lateral projection, is not less than a distance equal to the external radius of the body of the first tubular portion, or to the least lateral dimension from the central longitudinal axis of that portion to the external surface of the body of the tubular portion. The collar may also project laterally outwardly beyond the first tubular portion.Preferably the peripheral shapes of the collar and the intermediate portion are noncircular so as to restrain the socket from turning when it is cast in position for use. For example the peripheral shapes may be square, rectangular or hexagonal. The projection may be extended by providing the collar with a lateral flange extending continuously or intermittently around its periphery.
There may be some applications of use where because of the relatively low order of the loads to which it will be subjected the collar may be of a suitable plastics material, but generally it will be necessary for the collar to be made of metal to have the necessary strength to withstand the loads to which it will be subjected in use.
The collar may take various forms. It may, for example, be a square or hexagonal nut, or a metal block or piece of metal plate provided with a screw-threaded bore.
If desired for additional resistance to being pulled out of the concrete or other material into which the socket is cast for use, the socket may be provided with an auxiliary anchorage device which fits about the first tubular portion adjacent to the intermediate portion and projects laterally further than the latter. The anchorage device may be of generally top-hat shape, being fitted to the first tubular portion at the crown of the top-hat shape and extending past the intermediate portion and second tubular portion. The rim of the top-hat shape serves as a flange which enhances resistance to pulling out of the device, and hence of the socket, when it is cast in position for use.
The top-hat shape may be continuous or it may be segmented, for example to take on a spider-like form. The anchorage device may be made from plate or sturdy metal sheet.
The sheath may be injection moulded on to the collar. It may be made of any suitable plastics material, for example polyethylene, polyvinyl chloride or polypropylene. The material must be self-supporting so that it will hold its shape during casting of the socket into position for use.
Embodiments of the invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1 is an axial section through a socket in accordance with the invention shown cast in position for use,
Figure 2 is an axial section through another socket showing a modification, and
Figure 3 is a perspective view of a further embodiment.
Referring to Figure 1, the socket comprises a metal collar 1 and a moulded plastics sheath 2 in which the collar is encased.
The collar 1 is formed by a hexagonal nut having an internally screw-threaded bore 3 and a continuous circumferential flange 4 at one end which tapers in thickness to its periphery.
The sheath 2 has a first tubular portion 5 which is cylindrical and co-axial with, and of substantially similar internal diameter to, the bore 3 of the collar and projects from the flanged end of the collar.
The external diameter of the first tubular portion 5 is appreciably less than the diameter of the collar as measured across the flange 4. At its end 6 remote from the collar the tubular portion is open and has a continuous external annular flange 7. An intermediate portion 8 of the sheath joined to the first tubular portion encases the collar and its flange 4. Between, and joined to, the intermediate portion 8 and the annular flange 7 radial ribs 5' are formed on the exterior of the first tubular portion 5 which extend longitudinally of the latter portion at angularly spaced positions around the portion. A second tubular portion 9 projects from the opposite end of the collar as an uninterrupted continuation of the intermediate portion 8. Thus,
the internal diameter of the second tubular portion corresponds to the external diameter of the collar.
The second tubular portion is shorter than the first tubular portion 5. It has a closed end 10 remote from the collar.
As shown in Figure 1 , for use the socket is cast into concrete 1 for example, to the level of the open end of the first tubular portion 5 of the sheath, the annular flange 7 lying at the surface of the concrete. When the concrete has set the flanged collar encased by the sheath secured anchors the socket in the concrete and affords considerable resistance to pulling out of the socket from the concrete. The first tubular portion provides an entrance and a guide for, for example, a bolt 12 to be engaged with the collar and tightened into the bore 3. Just by way of example the bolt 1 2 is shown as securing a plate 13 against the surface of the concrete, but it may be used to secure various other articles to the concrete.The second tubular portion 9 provides clearance for the end of the bolt 12 to project below the collar. It also collects any bits of debris which may fall into the socket before the bolt is applied.
The radial ribs 5' and the annular flange 7
reinforce the first tubular portion 5 whilst avoiding undue bulk of material in the portion. When the concrete is to be cast in a mould which is to be vibrated the socket will be retained in the required position by bolting it to the mould, the bolt being engaged with the collar 1. The reinforcement provided by the ribs 5' and annular flange 7 prevents the first tubular portion 5 from collapsing longitudinally as the bolt is tightened in the collar, and thereby ensures that the collar is correctly located relative to the surface of the concrete. The ribs 5' also restrain the socket from turning and becoming loose on the securing bolt during vibratlon of the mould.
It will be appreciated that this form of socket is easy and cheap to produce. The collar can be a standard nut on to which the sheath in injection moulded.
The first tubular portion 5 may be made of various lengths to suit the depth at which the collar is desired to be located in the concrete. The anular flange 7 and arrangement of the ribs 5' allow the necessary changes in length to be made readily in the moulding of the socket on the collar.
In the modification shown in Figure 2 the socket is essentially similar to that described above and corresponding parts thereof are identified by the same reference numerals. There are slight differences in proportions of parts of the sockets, which of course may bs varied to suit the intended uses of the sockets. The modification lies in the addition of an auxiliary anchorage device 14. This device is made for metal sheet or plate and is of top-hat shape. A crown portion 1 5 of the device has a central aperture 1 6 which allows the device to be fitted over the first tubular portion 5 and for the crown portion to seat on the encased flanged end of the collar 1. Below the crown portion the anchorage device has a downwardly fiaring body 1 7 which extends past the collar and past, and below, the closed end 10 of, the second tubular portion 9. At its bottom the body has an outwardly directed, annular flange 18.
The anchorage device is set into concrete, for example, with the socket and because of the extended surface area which it presents by its crown, flared body and flange directed towards the surface of the concrete it affords appreciably greater resistance to pulling out of the socket from the concrete.
The anchorage device may be readily formed by blanking and pressing.
The embodiment shown in Figure 3 has a square collar 1 with an internally screw-threaded central bore, not shown. As before, a moulded plastics sheath 2 encases the collar, although in this embodiment the encasing is not complete.
The sheath 2 again has a cylindrical first tubular portion 5 extending from one end of the collar coaxial with, and of substantially similar internal diameter to, the threaded bore of the collar. The external diameter of the first tubular portion is substantially less than the side dimension of the square collar 1. The first tubular portion has external reinforcing radial ribs 5' and an annular flange 7 around its end remote from the collar.
The first tubular portion 5 is joined to an intermediate portion 8 of the sheath which encases most of the collar. Medial portions 1 9 of the side edges of the collar at the end of the collar from which the first tubular portion extends are left exposed. This saves some plastics material and the recesses 20 left in the intermediate portion 8 where the medial portions 1 9 are exposed help in keying the intermediate portion in the concrete in which the socket is cast for use. A second tubular portion 9 projects from the opposite end of the collar of similar external and internal diameters to the first tubular portion but shorter in length. The second tubular portion is closed at its end remote from the collar.
The socket is cast into concrete for use in similar manner to the socket of the first-described embodiment illustrated by Figure 1 of the drawings.
If desired, the collars of the embodiments described may be provided with locking threads, or locking patches in the threads of the bores.
Alternatively, locking of bolts or other externally screw-threaded members to the collars may be achieved by providing the bolts or members with suitable locking threads or patches in known manner.
Each socket may be marked to indicate the type of bolt and/or thread form which should be used with it.
Claims (14)
1. An internally screw-threaded socket adapted to be cast into concrete and other setting material for use, comprising a rigid collar having an internally screw-threaded bore extending through it, and a sheath of self-supporting plastics material which comprise an intermediate portion which encases, or substantially encases, the collar and two tubular portions which extend from the intermediate portion at opposite ends of the collar, co-axially, and communicating internally, with the internally screw-threaded bore, a first one of the tubular portions being open at its end remote from the collar, and second one of the tubular portions being closed at its end remote from the collar, and the intermediate portion of the sheath projecting
laterally outwardly beyond the first tubular portibn.
2. A socket according to claim 1 wherein the
collar projects laterally outwardly beyond the first tubular portion.
3. A socket according to claim 1 or claim 2 wherein the collar has a lateral flange extending at least partially around its periphery.
4. A socket according to any preceding claim
wherein the lateral projection, or the greatest lateral projection, of the intermediate portion of the sheath outwardly beyond the first tubular portion is not less than a distance equal to the external radius of the body of the first tubular portion, or to the least lateral dimension from the central longitudinal axis of that portion of the external surface of the body of the first tubular portion.
5. A socket according to any preceding claim wherein the collar and the intermediate portion of the sheath have non-circular peripheral shapes.
6. A socket according to any preceding claim wherein the periphery of the collar is partly exposed at the intermediate portion.
7. A socket according to any preceding claim wherein the first tubular portion has external reinforcing formations extending longitudinally thereof.
8. A socket according to claim 7 wherein the first tubular portion has external reinforcing rib formations extending longitudinally thereof from the intermediate portion to an external peripheral flange around the end of the first tubular portion remote from the intermediate portion.
9. A socket according to any preceding claim wherein the second tubular portion is of substantially similar cross-section to the first tubular portion.
10. A socket according to any of claims 1 to 8 wherien the second tubular portion is of substantially similar cross-section to the intermediate portion.
11. A socket according to any preceding claim wherein an auxiliary anchorage device is provided which fits about the first tubular portion adjacent to the intermediate portion and projects laterally further than the intermediate portion, thereby to afford additional resistance to the socket's being pulled out of the concrete or other material into which the socket is cast for use.
12. A socket according to claim 11 wherein the auxiliary anchorage device is of generally top-hat shape, being fitted to the first tubular portion at the crown of the top-hat shape and extending past the intermediate portion and the second tubular portion.
13. A socket according to claim 12 wherein the top-hat shape is segmented.
14. A socket according to any preceding claim wherein the bore of the collar has a locking thread.
1 5. A socket according to any of claims 1 to 1 3 wherein the collar has a locking patch in the thread of the internally screw-threaded bore.
1 6. A socket substantially as described herein with reference to and as illustrated by Figure 1 of the accompanying drawings.
1 7. A socket substantially as described herein with reference to and as illustrated by Figure 2 of the accompanying drawings.
1 8. A socket substantially as described herein with reference to and as illustrated by Figure 3 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08221126A GB2103749A (en) | 1981-07-23 | 1982-07-21 | Screw-threaded socket for casting into concrete |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8122719 | 1981-07-23 | ||
| GB08221126A GB2103749A (en) | 1981-07-23 | 1982-07-21 | Screw-threaded socket for casting into concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2103749A true GB2103749A (en) | 1983-02-23 |
Family
ID=26280219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08221126A Withdrawn GB2103749A (en) | 1981-07-23 | 1982-07-21 | Screw-threaded socket for casting into concrete |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2103749A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2133103A (en) * | 1982-11-30 | 1984-07-18 | Francis Cunningham | Threaded socket for embedding in concrete |
| GB2169678A (en) * | 1985-01-16 | 1986-07-16 | Ward Brothers | Securing a threaded member to a further member |
| DE3526940A1 (en) * | 1985-07-27 | 1987-02-12 | Siegfried Fricker | ANCHOR TO CONCRETE IN HEAVY LOADS |
| EP0854244A1 (en) * | 1997-01-15 | 1998-07-22 | The Burke Group L.L.C. | Slotted insert with increased pull-out capacity |
| DE19711537A1 (en) * | 1997-03-20 | 1998-10-15 | Daniel Maechtle | Rag bolt mounting on concrete structure |
| US7255930B2 (en) * | 2004-04-05 | 2007-08-14 | Kabushiki Kaisha Toyota Jidoshokki | Cap nut for envelopment casting, casting including the cap nut and method of enveloping the cap nut in casting |
| US8122660B2 (en) * | 2005-11-15 | 2012-02-28 | Milan Kekanovic | Possibility of special lightening, insulating and reinforcing intermediate floor constructions |
| EP3382118A1 (en) * | 2017-03-31 | 2018-10-03 | Black & Decker Inc. | Cast-in-place anchors |
| US10384085B1 (en) * | 2016-06-17 | 2019-08-20 | Climb Tech, Llc | Concrete anchor point and method for constructing same |
-
1982
- 1982-07-21 GB GB08221126A patent/GB2103749A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2133103A (en) * | 1982-11-30 | 1984-07-18 | Francis Cunningham | Threaded socket for embedding in concrete |
| GB2169678A (en) * | 1985-01-16 | 1986-07-16 | Ward Brothers | Securing a threaded member to a further member |
| DE3526940A1 (en) * | 1985-07-27 | 1987-02-12 | Siegfried Fricker | ANCHOR TO CONCRETE IN HEAVY LOADS |
| EP0854244A1 (en) * | 1997-01-15 | 1998-07-22 | The Burke Group L.L.C. | Slotted insert with increased pull-out capacity |
| US5809703A (en) * | 1997-01-15 | 1998-09-22 | Mmi Products, Inc. | Slotted insert with increased pull-out capacity |
| DE19711537A1 (en) * | 1997-03-20 | 1998-10-15 | Daniel Maechtle | Rag bolt mounting on concrete structure |
| DE19711537C2 (en) * | 1997-03-20 | 1999-02-04 | Daniel Maechtle | Device for attaching bolt anchors to concrete structures |
| US7255930B2 (en) * | 2004-04-05 | 2007-08-14 | Kabushiki Kaisha Toyota Jidoshokki | Cap nut for envelopment casting, casting including the cap nut and method of enveloping the cap nut in casting |
| US8122660B2 (en) * | 2005-11-15 | 2012-02-28 | Milan Kekanovic | Possibility of special lightening, insulating and reinforcing intermediate floor constructions |
| US10384085B1 (en) * | 2016-06-17 | 2019-08-20 | Climb Tech, Llc | Concrete anchor point and method for constructing same |
| EP3382118A1 (en) * | 2017-03-31 | 2018-10-03 | Black & Decker Inc. | Cast-in-place anchors |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |