GB2443631A - Retractable bollard assembly - Google Patents
Retractable bollard assembly Download PDFInfo
- Publication number
- GB2443631A GB2443631A GB0622167A GB0622167A GB2443631A GB 2443631 A GB2443631 A GB 2443631A GB 0622167 A GB0622167 A GB 0622167A GB 0622167 A GB0622167 A GB 0622167A GB 2443631 A GB2443631 A GB 2443631A
- Authority
- GB
- United Kingdom
- Prior art keywords
- post
- housing
- aperture
- bollard assembly
- bollard
- 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- Withdrawn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
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 241000131390 Glis Species 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
- E01F9/646—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection extensible, collapsible or pivotable
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
- E01F13/04—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage
- E01F13/044—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage the barrier being formed by obstructing members situated on, flush with, or below the traffic surface, e.g. with inflatable members on the surface
- E01F13/046—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage the barrier being formed by obstructing members situated on, flush with, or below the traffic surface, e.g. with inflatable members on the surface the obstructing members moving up in a translatory motion, e.g. telescopic barrier posts
-
- E01F9/019—
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
A retractable bollard comprises a post 12 that is axially movable between a retracted position in housing 14 and an extended protruding position when a guide 48 is aligned with an aperture 58 of a locking plate 24. The post can be locked when the guide 48 is not aligned with the lock plate 24 aperture, which can be achieved by rotating either the post 12 or a locking rod 34 to which guide 48 is fixed. The aperture 58 may be non-circular, in the shape of a keyhole (fig 5, 56) having aperture 58 intersecting an edge and a secondary lock (fig 1, 42) that may be operated by a key can inhibit rotation of the post 12 or locking rod 34. The guide 48 may alternatively be a long tab fixed to the inside of post 12 (figs 10 and 11) whereupon the locking plate 24 is a circular disc with an aperture in its edge (fig 12, 88). The bollard is intended to be used to restrict traffic flow when the post is extended and present no obstruction by being flush with the ground when the post is stowed.
Description
I
Title: Bollard Assemblies
Description:
This invention relates to bollard assemblies and in particular, to retractable bollards. Retractable bollards are widely used for security purposes, and in particular, to control traffic and pedestrian flow.
Retractable bollards generally comprise a post that can be raised to a vertical position above ground level to present an obstruction to oncoming traffic. When it is desired to permit the flow of traffic, the post can be stowed so that it no longer protrudes above ground level, and thus no longer presents an obstruction to oncoming traffic.
Retractable bollards are available in a variety of forms. Some retractable bollards comprise a pivoted post that can pivot between a generally vertical position and a generally horizontal position. A housing is often provided that accommodates the post when pivoted to the horizontal position. In other cases, the post can be slidable vertically into, and out of, a housing. This invention is concerned, primarily, with the latter type.
In many cases, it is desirable for the housing to be fitted flush with the ground so as not to present an obstruction to oncoming traffic when the bollard is stowed.
A ocking means is normally provided to enable the post to be locked in the stowed or deployed position. thereby preventing inadvertent movement between the deployed and stowed position. A secondary locking means, such as a key-operated lock, is also commonly provided to prevent unauthorised tampering with the bollard.
A problem with known bollards is that the locking mechanism comprises a pin that engages a lip or recess in the housing. Excessive force applied to the post can cause the pin to bend, which compromises the integrity of the bollard. Another known problem is that correct alignment of the pin with the recess or lip is required before the post can be moved between the stowed and deployed positions. Since the pin is generally concealed from view, aligning it can be awkward.
It is an object of the invention to address one or more of the above problems, and/or to provide an improved retractable bollard.
A first aspect of the invention provides a bollard assembly comprising a housing, a post axially movable between a retracted position in which it is at least partially accommodated by the housing, and an extended position in which it at least partially protrudes from the housing, a guide means fixed relative to one of the post or the housing, and a locking plate fixed relative to the other of the post or the housing, the locking plate having an aperture therein for receiving the guide means, wherein the post is axially movable relative to the housing when the guide u means is aligned with the aperture.
Preferably, the post is rotatable about its longitudinal axis to enable the ajide to be aigned w;th the aperture. The post is preferably axialy ockaoe relative to the housing by rotation of the post to a cosition in vric the guide means does not align witn the aperture.
The locking plate of the bollard assembly preferably comprises a non-circular aperture. Preferably. the aperture is keyhole-shaped. The keyhole-shaped aperture may have a first portion for receiving a part of the post (e.g. the post itself, or a locking rod connected/affixed thereto) and a second portion, radially extending from the first portion, for receiving the guide means. The diameter of the first portion is preferably greater than the external diameter of the post or locking rod, but less than the sum of the external diameter of the post and the radial width of the guide means. Preferably, the maximum radial width of the second portion of the keyhole aperture is greater than the radial width of the guide means.
Alternatively, the aperture may comprise a cut-out or a notch in the edge of the locking plate (i.e. so that the aperture intersects an edge of the locking plate).
In a preferred embodiment of the invention, the guide means comprises a protrusion affixed to the post and/or the locking rod, and most preferably, an elongate protrusion or tab. The elongate tab, where provided, may be shorter in length than the post so that its upper and lower ends/edges can be used to abut the lower or upper surfaces of the locking plate, respectively, to inhibit/prevent axial movement of the post with respect to the housing.
The guide is preferably affixed parallel to the longitudinal axis of the post.
The post and/or the housing are preferably tubular. The housing and/or the post is/are preferably elongate. The post preferably has a circular cross-section to facilitate rotation thereof within a (circular) aperture.
A secondary locking means, such as a key-operated lock, is preferably provided to selectively inhibit rotation of the post about its longitudinal axis relative to the housing.
A preferred embodiment of the invention shall now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1 is a perspective, partially cut-away view of a first type of bollard assembly in accordance with the invention; Figures 2, 3 and 4 are schematic side views of the bollard assembly of Figure 1 with the post tube lowered, partially raised and fully raised, respectively; Figure 5 is a view from above of the housing shown in Figure 1 with the post tube removed; Figure 6 is a schematic plan view of the locking plate of Figure 5; Figure 7 is a perspective view of the locking rod of Figure 1 in isolation; Figure 8 is a perspective view of the post tube of Figure 1 in 2(1 isolation; Figure 9 is a schematic plan view of the secondary locking plate of Figure Figure 10 is a schematic longitudinal cross-section through a second type of bollard assembly in accordance with the invention: the post being in a retracted position; Figure 11 is a schematic longitudinal cross-section through the S bollard assembly of Figure 10 with the post in a deployed position: and Figure 12 is a schematic partial transverse cross-section of Figure or Xll-Xli.
In Figure 1, a bollard assembly 10 comprises, a post tube 12 above ground level 16 and a tubular housing 14 located below ground level 16.
The post tube 12 can slide relative to the housing between a deployed position (as shown) in which it presents an obstruction to oncoming traffic, and a retracted position in which the post tube 12 is slidably retracted into the housing 14 so that it is housed below ground level 16.
The tubular housing 14 comprises a generally square-section, steel housing tube 18 that is welded at its lower end to a generally square shaped anchor plate 20. The area of the anchor plate 20 is slightly larger than the cross-sectional area of the housing tube 18 so that when the housing 14 is placed in a hole and concrete poured in, the anchor plate 20 keys the housing 14 in place and thus inhibits lateral and vertical u movement thereof.
Also centrally welded to the anchor plate 20 and extedinc ertcay Jpwardii therefrom sde t-e ousing tube 16, s a see suppcr tube 22 of circuiar crcss-sector,. The support tube 22 is slightly shorter than the housing tube 16 for reasons that shall become apparent iater.
The upper end of the support tube 22 has a circular locking plate 24 welded thereto. As can be best seen in Figures 5 and 6, the locking plate 24 has a keyhole shaped aperture 54 therein when viewed from above.
A flat, steel road plate 26 is welded to the upper end of the housing s tube 18. The upper surface of the road plate 26 is arranged to lie flush with the ground 16 when the bollard assembly 10 is installed. The road plate 26 comprises a flip-up cover plate 28 that permits access to the internal components of the housing 14.
Above ground level 16, the bollard assembly 10 comprises a post tube 12, which presents an obstruction to oncoming vehicles. The post tube 12 is manufactured of circular section steel tube. A secondary locking plate 30 is welded inside the post tube 12 slightly below its upper end. The secondary locking plate has a central through aperture 33 for receiving an upper end of a locking rod 34. The upper end of the locking rod 34 has a through hole 36 that enables a secondary locking mechanism to rigidly connect thereto. The secondary locking mechanism 40 comprises a key lock 42 having a downwardly projecting pin arranged to engage a non-central aperture 44 in the secondary locking plate 30 (see Figure 9) when in a locked position. Thus, rotation of the locking rod 34 2() can be prevented or permitted using the key lock 42.
A pull-out handle 46 formed from a generally u-shaped bent rod is provided to facilitate lifting and lowering the bollard tube 12.
A guide rod 48 comprising an elongate metal rod of shorter length than the locking rod 34 is welded to the side of the locking rod 34. The upper 50 and lower end faces 52 of the guide rod 48 form abutment surfaces that can, in use, abut the lower and upper faces of the locking plate 24, respectively.
In Figure 2, the post tube 12 has been moved to a lowered position so that it is completely within the housing tube 18. The upper end face 50 of the guide rod 48 is adjacent the lower face of the locking plate 24 thereby preventing upward movement of the post tube 12 with respect to the housing 14.
In Figure 3, it can be seen that that the locking rod 34 has been rotated by 180 so that the guide rod 48 can fit through the keyhole aperture 54 in the locking plate 24. Thus, the post tube 12 can be slid up or down with respect to the housing 14. Since the guide rod 48 extends along most of the length of the locking rod 34, rotation of the locking rod 34 whilst the post tube 20 is at a position between the fully extended and fully retracted position is substantially prevented. This means that the bollard can only be fully extended or fully retracted and facilitates alignment of the locking rod 34 or post tube 12 during deployment and stowage.
In Figure 4, the post tube 12 is fully extended and the locking rod 34 has been rotated back through 180w so that the lower end face 52 of the guide rod 48 rests on the upper face of the locking plate 24 thereby preventing downward movement of the post tube 12 with respect to the housing 14.
In Figure 5, the aperture 54 in the locking plate 24 can be clearly seen. The aperture 54 is generally keyhole shaped and comprises a first circular portion 56 and a second generally rectangular portion 58 extending radially outwardly therefrom.
As can also be seen more clearly in Figure 5, the road plate 26 is generally rectangular when viewed from above. The cover plate 28 is pivotalfy connected to the road plate 26 by a pintle hinge 27. The cover plate 28 has a finger cut-out 29 to facilitate manually lifting and lowering it.
In Figure 6, it can be seen that the radius 60 of the locking rod 34 is slightly less than that 62 of the first circular portion 56 of the keyhole aperture 54. Likewise, the radial projection 64 of the guide rod 48 is slightly less than the distance 66 from the centre 68 of the circular hole portion 56 to the outer edge 70 of the rectangular portion 58 of the keyhole aperture 54. The radial projection 64 of the guide rod 48 is slightly greater than the radius 62 of the first circular portion 56 of the keyhole aperture 54. Thus, when the guide rod 48 is aligned with the rectangular portion 58 of the keyhole aperture 54, the locking rod 34 is generally free to slide up or down. However, when the guide rod 48 is not aligned with the rectangular portion 58 of the keyhole aperture 54 (as shown by dashed hnes in Figure 6), the locking rod 34 cannot slide up or down and can thus only be left in its fully extended or fully retracted position.
FQUIe 7. the cckng rod 3 has an ena stop 72 welded to ts lower end circumferentially cpposite the guide rod 48. The purpose of the enc stop 72 is to prevent the post tube 12 from being inadvertently disconnected from the housing 14. If the post tube 12 is pulled out of the housing 14 too far, the upper face 74 of the end stop 72 will contact the lower surface of the locking plate 24, thereby preventing further removal.
However, if the bollard assembly 10 needs to be disassembled (for servicing etc.), the locking rod 34 can be rotated so that the end stop 72 aligns with the rectanciular portion 58 of the keyhole aperture 54 to permit disconnection of the post tube 12 from the housing 14.
As previously mentioned, the locking rod 34 has a transverse through hole 36 at its upper end. In use, a connecting pin 84 is used, which passes through this hole 36 and a corresponding hole in the secondary locking mechanism 40 to rigidly connect the locking rod 34 to the secondary locking mechanism 40.
In Figure 8, the post tube 12 comprises a cylindrical steel tube, which has an access hole 76 towards its upper end. The access hole 76 1 5 can be used to access the pin 84 that rigidly connects the locking rod 34 to the locking mechanism 40. The access hole 76 is radially positioned sc that the pin 84 can only be accessed when the locking mechanism 40 is unlocked and the locking rod 34 rotated so that the guide rod 48 aligns with the rectangular portion 58 of the keyhole aperture 54.
The post tube 12 also has a pair of generally square, paraDe!, spaced apart centraliser plates 78 located towards its lower end. The centraiiser plates 78 sie slighUy smafler than the inner dimensions of the housing tube 18 so that the post tube 12 is relatively free to slide up and down within it. The outer edges 80 of the centraliser plates 76 have rectangular cut-outs 82 so that only the corners of the centraliser plates 78 contact the inner surfaces of the housing tube 12. This helps to prevent the post tube 12 from sticking in the housing tube 18 and allows rainwater to drain into the housing tube 18.
In use, the post 12 of the bollard assembly 10 can be extended and locked as follows: A user approaches the bollard assembly 10 and lifts the cover plate 28 to expose the top of the post tube 12. Using a key, the key lock 42 can be operated and the barrel thereof pulled upwards to cause the downwardly projectinq pin of the secondary locking mechanism 40 to disengage the non-central aperture 44 of the secondary locking plate 30.
Once the secondary locking pin has been retracted, the secondary locking mechanism, and hence the locking rod 34, which is rigidly connected thereto, is free to rotate relative to the locking plate 24. Thus, using the handle 46, the user can rotate the secondary locking mechanism 40 until the locking rod 48 aligns with the second portion 58 of the keyhole aperture 54. (In practice, correct alignment of the locking rod 48 with the second portion 58 of the keyhole aperture 54 can be detected by feel if an upward pull is exerted on the handle 46 during rotation). Once aligned, the post 12 can be lifted using an upward pull on the handle 46. Once fully extended, the secondary locking mechanism 40 is can be rotated using the handle 46 so that the locking rod 48 no longer aiigns with the second portion 58 of the keyhole aperture 54. The lower face 52 of the locking rod 48 then abuts the upper surface of the locking plate 24 preventing the post 12 from being retracted.
The secondary locking mechanism can be rotated back to its original position and the key lock 42 depressed to cause downwardly projecting pin of the secondary locking mechanism 40 to re-engage the non-central aperture 44 of the secondary locking plate 30. This prevents the locking rod 48 from being rotated into alignment with the second portion 58 of the keyhole aperture 54.
Retraction and/or locking down of the post 12 can be achieved by reversing the above steps.
In Figures 10 and 11, the bollard assembly 10 is similar to that shown previously, having a circular cross-section post tube 12 that is slidably movable relative to a housing tube 18. The same reference numerals are used to refer to components previously described. The main iS difference between the second embodiment of the Invention and that previously described is the position of the guide 48. In Figures 10 and 11, it can be seen that the guide 48 comprises an elongate steel tab welded longitudinally to inner surface of the post tube 12. The guide 48 is slightly shorter than the post tube 12, providing sufficient clearance at both ends 2; to accommodate the locking plate 24.
The iocking plate 24 comprises a circular ste& disc having an outer dsmeter that is sUQhftj smafler than the internai diameter of the post tube 12. The locking plate 24 is rigidly held in place by a locking plate support rod 86 that extends vertically upwards from the centre of the anchor plate 20.
As can be best seen in Figure 12, the edge of the locking plate 24 has a rectangular cut-out 88 therein that is slightly larger than the cross-section of the guide 18.
Thus, when the post tube 12 is rotated so that the guide 48 aligns with the cut-out 88, the post tube 12 is able to slide axially relative to the locking plate 24. When the post tube 12 is fully raised, the post tube 12 can be rotated so that the guide 48 no longer aligns with the cut-out 88.
JO When the post tube 12 is released, it drops down until the lower edge 52 of the guide 48 abuts the upper surface of the locking plate 24, thereby locking the post tube 12 in a deployed position. Likewise, when the post tube 12 is rotated so that the guide 48 aligns with the cut-out 88, the post tube 12 can be fully lowered and rotated so that the guide 48 no longer aligns with the cut-out 88. The upper edge 50 of the guide 48 abuts the lower surface of the locking plate 24, thereby preventing the post tube 12 from being raised.
The invention is not limited to the details of the foregoing embodiments. For example, the post tube may comprise an outer protective o, decorative coating, such as a plastics (in particular. a polyurethane' coating. Visibility aids may be affixed to the post tube such as reflectors brightiy coloured strips andior glis. The boli&o assemL could be manufactured primarily from steei (e.g. stainless steel gaivanisea steel or mild steel), or aluminium. Additionally, the guide rod may comprise a pair of short guide rods located at either end of the locking rod, rather than a single, elongate guide rod. The guide rod could be tubular, and may have a different cross-section, such as square or rectangular, to that shown in the drawings.
Claims (18)
- Claims: 1 A bollard assembly comprising: a housing, a post axiallymovable between a retracted position in which it is at least partially accommodated by the housing, and an extended position in which it at least partially protrudes from the housing, a guide means fixed relative to one of the post or the housing, and a locking plate fixed relative to the other of the post or the housing, the locking plate having an aperture therein for receiving the guide means, wherein the post is axially movable relative to the housing when the guide means is aligned with the aperture. 1-s
- 2. A bollard assembly as claimed in claim 1, wherein the post is rotatable about its longitudinal axis to enable the guide to be aligned with the aperture.
- 3. A bollard assembly as claimed in claim i or claim 2. wherein the post is axially lockable relative to the housing by rotation of the post to a position in which the guide means does not align with the aperture.
- 4. A bollard assembly as claimed in any of claims 1, 2 or 3, wherein the aperture in the locking plate is non-circular.
- 5. A bollard assembly as ciaimed in any of claims I to 4.S wherein the lockinq plate comprises a keyhole shaped aperture having a first portion for receiving a part of the post and a second portion, radially extending from the first portion, for receiving the guide means.
- 6. A bollard assembly as claimed in claim 5, wherein the post comprises a locking rod receivable within the first portion of the aperture.
- 7. A bollard assembly as claimed in any of claims 1 to 6, wherein the guide means comprises a protrusion affixed to the post and/or the locking rod.
- 8. A bollard assembly as claimed in claim 7, wherein the protrusion comprises an elongate tab.2(.)
- 9. A bollard assembiy as claimed in claim E. wherein the elongate tab is shorter in ength than the post.
- 1O.A bollard assembly as c[aimed in any of caims 1 to 9.wherein the cuide is affixec paraueltc the longitudinal axis of the oost.
- 11.A bollard assembly as claimed in any of claims 1 to 10, wherein the aperture intersects an edge of the locking plate.
- 12.A bollard assembly as claimed in any of claims 1 to 11, wherein the post and/or the housing is tubular.
- 13.A bollard assembly as claimed in claim 12, wherein the post has a circular cross-section I0
- 14.A retractable bollard assembly as claimed in any preceding claim further comprising a secondary locking means.
- 15.A bollard assembly as claimed in claim 14, wherein the secondary locking means comprises a key-operated lock.
- 16.A bollard assembly as claimed in claim 13 or claim 14.wherein the secondary locking means is arranged to selectively inhibit rotation of the post about its longitudinal axis relative to the housing.
- 17.A bollard assembly as claimed in any preceding claim.wherein the housing is elongate.
- 18.A bollard assembly substantially as hereinbefore described, with reference to, and as illustrated in, the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0622167A GB2443631A (en) | 2006-11-07 | 2006-11-07 | Retractable bollard assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0622167A GB2443631A (en) | 2006-11-07 | 2006-11-07 | Retractable bollard assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0622167D0 GB0622167D0 (en) | 2006-12-20 |
| GB2443631A true GB2443631A (en) | 2008-05-14 |
Family
ID=37594472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0622167A Withdrawn GB2443631A (en) | 2006-11-07 | 2006-11-07 | Retractable bollard assembly |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2443631A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9127423B2 (en) | 2011-03-31 | 2015-09-08 | ATG Access Ltd. | Bollards |
| US9127422B2 (en) | 2011-01-28 | 2015-09-08 | ATG Access Ltd. | Bollards |
| US9127421B2 (en) | 2011-01-28 | 2015-09-08 | ATG Access Ltd. | Bollards |
| US9133589B2 (en) | 2011-05-27 | 2015-09-15 | ATG Access Ltd. | Bollards |
| US9133590B2 (en) | 2011-01-28 | 2015-09-15 | ATG Access Ltd. | Bollards |
| US9217229B2 (en) | 2011-08-01 | 2015-12-22 | ATG Access Ltd. | Barriers |
| US11613858B2 (en) | 2017-05-02 | 2023-03-28 | Atg Access Ltd | Barriers |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB485179A (en) * | 1936-11-14 | 1938-05-16 | Steelway Ltd | Improvements in removable stanchions for use more especially with street barriers |
| GB1207337A (en) * | 1966-11-25 | 1970-09-30 | Marie-Josephe Demanega | Improvements in or relating to a disconnectable metal upright secured to a pedestal |
| US5819471A (en) * | 1997-08-28 | 1998-10-13 | Koerber; Gary | Retractable post |
| AU714291B3 (en) * | 1999-07-07 | 1999-12-23 | Bozidar Klinsic | An improved bollard |
| AU719634B2 (en) * | 1991-04-19 | 2000-05-11 | Eugene Patrick O'Callaghan | Device for controlling access to accessways and limited areas |
-
2006
- 2006-11-07 GB GB0622167A patent/GB2443631A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB485179A (en) * | 1936-11-14 | 1938-05-16 | Steelway Ltd | Improvements in removable stanchions for use more especially with street barriers |
| GB1207337A (en) * | 1966-11-25 | 1970-09-30 | Marie-Josephe Demanega | Improvements in or relating to a disconnectable metal upright secured to a pedestal |
| AU719634B2 (en) * | 1991-04-19 | 2000-05-11 | Eugene Patrick O'Callaghan | Device for controlling access to accessways and limited areas |
| US5819471A (en) * | 1997-08-28 | 1998-10-13 | Koerber; Gary | Retractable post |
| AU714291B3 (en) * | 1999-07-07 | 1999-12-23 | Bozidar Klinsic | An improved bollard |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9127422B2 (en) | 2011-01-28 | 2015-09-08 | ATG Access Ltd. | Bollards |
| US9127421B2 (en) | 2011-01-28 | 2015-09-08 | ATG Access Ltd. | Bollards |
| US9133590B2 (en) | 2011-01-28 | 2015-09-15 | ATG Access Ltd. | Bollards |
| US9127423B2 (en) | 2011-03-31 | 2015-09-08 | ATG Access Ltd. | Bollards |
| US9133589B2 (en) | 2011-05-27 | 2015-09-15 | ATG Access Ltd. | Bollards |
| US9217229B2 (en) | 2011-08-01 | 2015-12-22 | ATG Access Ltd. | Barriers |
| US11613858B2 (en) | 2017-05-02 | 2023-03-28 | Atg Access Ltd | Barriers |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0622167D0 (en) | 2006-12-20 |
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