EP2363555A1 - Locking/unlocking device with improved tamper resistance and key thereof for a casted wing - Google Patents
Locking/unlocking device with improved tamper resistance and key thereof for a casted wing Download PDFInfo
- Publication number
- EP2363555A1 EP2363555A1 EP11156804A EP11156804A EP2363555A1 EP 2363555 A1 EP2363555 A1 EP 2363555A1 EP 11156804 A EP11156804 A EP 11156804A EP 11156804 A EP11156804 A EP 11156804A EP 2363555 A1 EP2363555 A1 EP 2363555A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- locking
- key
- bolt
- unlocking device
- opening
- 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.)
- Granted
Links
- 238000005266 casting Methods 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000000872 buffer Substances 0.000 description 24
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 239000000523 sample Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/006—Locks or fastenings for special use for covers or panels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1427—Locking devices
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/06—Lock wards
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
- E05B35/008—Locks for use with special keys or a plurality of keys ; keys therefor for simple tool-like keys
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C1/00—Fastening devices with bolts moving rectilinearly
- E05C1/08—Fastening devices with bolts moving rectilinearly with latching action
- E05C1/12—Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
- E05C1/16—Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the handle or member moving essentially in a plane substantially parallel to the wing or frame
Definitions
- the present invention relates to an improved tamper-evident locking / unlocking device for openwork casting parts. More particularly, the invention relates to an interlocking / unlocking device with automatic locking and secure lock actuated with a removable security key in which the keyhole is partially bordered on the underside by a projecting edge serving as both a guide to the key bit, keying and anti-theft protection.
- this type of locking / unlocking device can be easily actuated opening from the inside of the manhole, by maneuvering for example a movable part located on the underside of the buffer.
- the object of the invention is to improve the inviolability of existing locking / unlocking devices for cast iron coverings (buffers, manholes, hatches, etc.) used in various applications such as, for example, sanitation, storm basins, dry network, etc.
- Existing locking / unlocking devices intended to provide improved tamper resistance include those disclosed by patent applications FR n ° 2376919 on behalf of DUMORTIER and U.S. Patent No. 5564860 in the name of MAX AMANN.
- NORINCO devices do not allow the introduction of an explosimeter probe through the opening, as is sometimes required before lifting a protection plate and any act of unlocking to control the nature and the concentration the gas rate inside the room below.
- these devices have many components, which significantly increases their cost, and among these elements are many fragile parts may deteriorate, which may result in frequent maintenance, maintenance and repair costs. and important.
- the device according to the invention is usually intended for open-ended casting parts having a passage opening opening for a key, this passage opening being non-recessed and having in its central part an open through volume. allowing the possible introduction of an explosimeter probe or any other device, such as for example a cable, an optical fiber network, a miniature vision device, or a mini-camera.
- It is characterized in that it comprises a projecting edge fixed to or made in one piece with the underside of the opening, this projecting edge partially bordering the key passage at least on the side of the door.
- actuating element projecting from the sliding bolt and in that the bit of the key has a groove provided to bear on the projecting edge so that the key is guided by the projecting edge during its rotation for the purpose of moving the sliding bolt in its unlocking position.
- the sliding bolt of the locking / unlocking device of the invention is generally provided to engage in a strike reported on the buffer frame or in any other similar means ensuring the locking of the buffer.
- the locking / unlocking device of the invention has no means accessible from the top of the opening, so it is not fracturable from the outside.
- the protruding edge serving as a guide for the key also protects the access to the actuating element protruding from the sliding bolt, thus preventing the opening of the device by a tool other than the security key of the key. device according to the invention.
- This projecting edge also obscures the actuating element protruding from the sliding bolt so that the latter is not visible from the outside, which further enhances its inviolability.
- the projecting edge prevents the bit of the key from passing when the key is rotated in the wrong direction, and therefore has a free portion provided to let the bit key bit only when turned in the right direction. It thus fulfills the advantageous role of deceptive.
- the slidably mounted bolt can be easily actuated opening from its underside, for example by manually actuating the projecting actuating element, which allows anyone inadvertently locked easily open the opening.
- the elastic return means forcing the sliding bolt is preferably of the spring-loaded push-button type which avoids unlocking by vibration when passing vehicles and furthermore allows precise adjustment of the force to be applied when the bolt is opened.
- the key itself has an advantageous ergonomics and is of a design designed to use it as a handle or hang on the belt to keep it quickly and easily available.
- the locking / unlocking device 1 of the invention is preferably intended to be mounted on the lower face 2 of a casting 3, for example.
- a buffer 4 view of the floor, removable or pivoting opening said locking / unlocking device 1 being also provided to be actuated by a removable key 5 locking / unlocking.
- the casting part 3 may be a buffer 4 of manhole or the like whose opening 6 is mounted removable or pivoting on a fixed frame 7 in the form of a frame to be sealed for example on the edge of a look of a hatch access in a roadway, yard or the like.
- the casting part 3 has a through opening opening 8 for a key, for example in the conventional form of a circular orifice 9 extended radially by an oblong 10.
- This passage opening 8 is non-recessed and has in its central part a open through volume allowing the possible introduction of a probe or other.
- the locking / unlocking device 1 with improved tamper resistance comprises a bolt 11 slidably mounted in a housing 12, an elastic return means 13, a removable security key 5 and a projecting rim 14 secured to the underside 2 of the opening 6 of the casting part 3.
- the sliding bolt 11 is slidably mounted in a housing 12 between a locking position and an unlocking position of the sash 6.
- the sliding bolt 11 is cast iron and its position of locking corresponds to an output position of it.
- the sliding bolt 11 is preferably in the form of a conventional bolt cast iron, that is to say in the form of a parallelepiped whose front end portion is tapered. It may also have one or more sliding guide elements 15 and at least one actuating element 16.
- the guide elements 15 are preferably projecting and can be slidably accommodated in a guide oblong 17 provided in the housing 12. They serve to guide the bolt 11 during its sliding lock or unlock.
- Each actuating element 16 serves to slide the bolt 11 in the locked or unlocked position when it is stressed.
- the sliding bolt 11 in its rear end portion 18, the sliding bolt 11 has a longitudinal guide rod 19 and a lateral actuation extension. 20 ( figure 5 ).
- the sliding bolt 11 further comprises an actuating element 16 projecting which slides the bolt 11 between a locking position and an unlocking position when actuated.
- the projecting actuating element 16 is a nipple 21 made of stainless steel ( figure 4 ) which is welded or mounted by screwing or stamping on the sliding bolt 11, for example at its lateral extension of actuation 20.
- This actuating pin 21 passes through an oblong 22 provided in the housing 12 to be actuated manually or by the bit 41 of the key 5.
- the actuating stud 21 projecting also acts as a guide element 15 for the bolt 11 and prevents the total extraction of the bolt 11 from its housing 12.
- the housing 12 preferably has guide flanks 23 for the bolt 11 and an opening 24 through which the bolt 11 slides between a locking position and an unlocking position.
- the housing 12 in which the sliding bolt 11 is mounted may have various orifices 25 intended to be traversed by the sliding guide element or elements 15 and the actuating element or elements 16 of the bolt 11.
- the housing 12 has an orifice 26 provided to be traversed by the guide rod 19 of the bolt 11 and an oblong 22 provided to be traversed by the actuating pin 21 projecting from the bolt 11.
- This housing 12 is secured to the underside 2 of the opening 6, namely fixed to or made in one piece with the underside 2 of the opening 6.
- the elastic return means 13 forces the sliding bolt 11 in its locking position.
- it is a spring 27 made of stainless steel ( figure 6 ) housed in the housing 12 between a bottom wall 28 thereof and the rear end portion 18 of the bolt 11 to push the bolt 11 outward, in its extended position.
- the spring 27 may advantageously be mounted freely sliding around it.
- the removable security key 5 has a rod 29 and a bit 41 located at the free end 30 of the rod 29. It is designed to be introduced through the passage opening 8 for the key of the opening 6 so that after rotation thereof, the bit 41 pushes the actuating element 16 protruding from the sliding bolt 11 and thus moves the bolt 11 slidably mounted in its unlocked position.
- the bit 41 of the removable security key 5 has a groove 31 provided to bear on the projecting edge 14 so that the removable security key 5 is guided by the projecting edge 14 during its rotation for the purpose of moving the sliding bolt 11 in its unlocking position.
- the groove 31 of the bit 41 preferably has a shape substantially complementary to that of the sectional profile of the projecting edge 14.
- the removable security key 5 comprises a handling handle 32 mounted on its rod 29 opposite the blade 41.
- the key 5 can then act as a handle for manipulating the buffer 4 opening or closing.
- the key 5 may also include a support ring 33 on the rod 29, which is provided to abut on the outer periphery 34 of the 8 key passage hole when the key 5 is inserted into this hole.
- the position of this support ring 33 on the rod 29 is provided so that in the abutment position of the bearing ring 33 against the outer face 35 of the opening 6, the bit 41 of the key 5 arrives substantially at the same height as the actuating element 16 of the bolt 11.
- the projecting rim 14 is secured to the underside 2 of the sash 6, namely fixed to or made in one piece with the underside 2 of the sash 6.
- the projecting rim 14 partially borders the key passage 8, at least on the side of the key passage 8 located closest to the actuating element 16 projecting from the sliding bolt 11. It has a free portion intended to leave pass the bit 41 of the key 5 when it is turned in the right direction.
- the projecting edge 14 has a sectional profile of substantially square, rectangular or trapezoidal shape, for example with a thickness between 2 mm and 10 mm, and more preferably between 4 mm and 6 mm. It is assigned a general shape question mark or stick whose straight portion 36 borders the rectilinear portion 37 on one side of the keyway 8 for key when it is in the conventional form of a circular orifice 9 extended radially by an oblong 10.
- the mounting of the locking / unlocking device 1 with enhanced tamper resistance of the invention is extremely simple and does not require the use of any particular tool. He is represented on the figure 7 for its preferred embodiment, wherein the housing 12 is in one piece with the opening 6 of the casting part 3. It will be recalled however that this housing 12, which has for example the projecting edge 14, can also be secured against the underside 2 of the opening 6, by screwing, welding or any other technique.
- the resilient biasing means 13 pushes the bolt 11 outwards, it is first introduced at the bottom of the housing 12, then it is the turn of the bolt 11 to be introduced. The bolt 11 and the elastic return means 13 are introduced into the housing 12 through the opening 24 provided therein, through which the bolt 11 slides once the locking / unlocking device 1 assembled. Any means can then be provided so that the bolt 11 can not be fully extracted from its housing.
- the elastic return means 13 is a spring 27 which is slidably mounted on the longitudinal guide rod 19 provided at the rear of the bolt 11 before the introduction of the assembly into The housing 12.
- a stainless steel pin 21 is then introduced through an oblong 22 provided in the housing 12, then mounted projecting by screwing or stamping on the sliding bolt 11, at its lateral actuation extension 20 which presents for this purpose a port 38 which can be threaded.
- this actuating pin 21 then fulfills both the role of a manual or mechanical actuating element 16 for the key 5 and a guide element 15 for the bolt 11. and prevents the total extraction of the bolt 11 from its housing 12.
- the bolt 11 in its rest position, the bolt 11 is positioned in the housing 12 so that its tapered portion 39 is slightly projecting out of the housing 12.
- the tapered portion 39 of the bolt 11 serves as a sliding ramp for the bolt 11 against the edge of the fixed frame 7 in the form of a frame of the casting piece 3, for that the bolt 11 is forced back into its housing 12 before returning to its locking position when the opening 6 of the casting part 3 is in the closed position, the way you slam a door.
- the locking / unlocking device 1 of the invention is automatically locking.
- the use of the locking / unlocking device 1 according to the preferred embodiment of the invention of the invention is extremely simple.
- the removable security key 5 When the opening 6 of the casting part 3 is closed and locked ( figure 8 ), the removable security key 5 must first be introduced into the keyway 8 of the key ( figure 9 ) until its support ring 33 comes into abutment on the outer periphery 39 of the key passage opening 8.
- the bit 41 of the key 5 is then in lateral abutment on one side against the inner flank 40 of the projecting rim 14.
- This keying effect prevents turning the key 5 in the wrong direction, the correct direction of rotation being here , for the user, the clockwise direction (counterclockwise on the Figures 8 to 13 because seen from the other side).
- Key 5 is then rotated clockwise ( figure 10 ) until the bit 41 comes into abutment against the actuating pin 21 of the bolt 11 ( figure 11 ). Continuing to turn the key 5, the bit 41 of the latter actuates the actuating stud 21 of the bolt 11, which moves the bolt 11 to the unlocking position ( figure 12 ). Once the bolt 11 in the unlocking position ( figure 13 ), the opening 6 can be opened, for example by using the handle 32 of the key 5 as a handling handle.
- the closure of the buffer 4 can then be done in two ways. Either by performing the preceding steps in the reverse order, or by removing the key 5 after turning it counterclockwise to release it and letting the opening 6 by its own weight, the latter being then locked by the automatic locking effect of the device 1 of the invention.
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Lock And Its Accessories (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
Description
La présente invention concerne un dispositif de verrouillage/déverrouillage à inviolabilité améliorée pour pièce de fonderie à ouvrant. Plus particulièrement, l'invention se rapporte à un dispositif de verrouillage/déverrouillage antieffraction à verrouillage automatique et à verrou sécurisé actionné avec une clé amovible de sécurité dans lequel l'orifice de passage de clé est bordé partiellement en sous face par une bordure en saillie servant à la fois de guide au panneton de la clé, de détrompeur et de protection antieffraction.The present invention relates to an improved tamper-evident locking / unlocking device for openwork casting parts. More particularly, the invention relates to an interlocking / unlocking device with automatic locking and secure lock actuated with a removable security key in which the keyhole is partially bordered on the underside by a projecting edge serving as both a guide to the key bit, keying and anti-theft protection.
Il est connu de remplacer les tampons massifs en fonte traditionnelle par des tampons plus légers, par exemple en fonte grise à graphite sphéroïdal. Cependant, en raison de leur poids plus faible, ces derniers sont susceptibles d'être soulevés accidentellement, par exemple par le passage de véhicules de type poids lourd, ce qui peut entraîner, entre autre, des accidents de véhicules ou de personnes.It is known to replace traditional massive cast iron buffers with lighter buffers, for example gray cast iron with spheroidal graphite. However, because of their lower weight, they are likely to be lifted accidentally, for example by the passage of heavy vehicles, which can cause, inter alia, accidents of vehicles or people.
En outre, il est nécessaire de verrouiller les tampons de regard de chaussée de manière inviolable afin d'en interdire le vol ou l'ouverture à des personnes non autorisées, que ces dernières soient mal intentionnées, ou simplement pour leur propre sécurité.In addition, it is necessary to lock the manhole buffers inviolably to prevent theft or opening to unauthorized persons, that they are malicious, or simply for their own safety.
Il a donc été développé de nombreux dispositifs de verrouillage/déverrouillage pour les tampons de regard de chaussée qui comprennent une clé amovible prévue pour pénétrer dans une cavité de forme et dimensions correspondant à celles de l'extrémité de la clé afin d'actionner un verrou pivotant.It has therefore been developed many locking / unlocking devices for pavement manhole buffers that include a removable key provided to enter a cavity of shape and dimensions corresponding to those of the end of the key to actuate a lock swivel.
Constatant que le personnel manoeuvrant ce type de tampon peut oublier de procéder à son verrouillage, il a été développé des dispositifs à verrouillage automatique du tampon lors de sa fermeture. Néanmoins, ce type de dispositifs implique un risque important d'enfermement accidentel du personnel pénétrant dans le regard de chaussée.Noting that staff operating this type of buffer may forget to lock it, it has been developed devices with automatic locking of the buffer when it is closed. Nevertheless, this type of device involves a significant risk of accidental confinement of personnel entering the manhole.
Il est donc important que ce type de dispositifs de verrouillage/déverrouillage puisse être facilement actionnable en ouverture depuis l'intérieur du regard de chaussée, en manoeuvrant par exemple une pièce mobile située en sous face du tampon.It is therefore important that this type of locking / unlocking device can be easily actuated opening from the inside of the manhole, by maneuvering for example a movable part located on the underside of the buffer.
Avantageusement, il est généralement prévu de pouvoir utiliser la clé de déverrouillage du tampon pour soulever ce dernier, cette dernière formant une poignée de soulèvement du tampon pour ainsi permettre un accès immédiat au réseau souterrain raccordé au regard.Advantageously, it is generally planned to be able to use the unlocking key of the pad to lift the latter, the latter forming a handle for lifting the pad so as to allow immediate access to the underground network connected to the manhole.
Le but de l'invention est d'améliorer l'inviolabilité des dispositifs de verrouillage/déverrouillage existants pour les pièces de recouvrement en fonte (tampons, regards de chaussée, trappes, etc.) utilisées dans des applications diverses telles que, par exemple, l'assainissement, les bassins d'orage, le réseau sec, etc. Parmi les dispositifs de verrouillage/déverrouillage existants ayant pour but d'offrir une inviolabilité améliorée, on peut citer ceux divulgués par les demandes de brevet
Cependant, dans ces dispositifs, le mécanisme assurant le verrouillage du tampon dans son cadre est d'un accès relativement facile de l'extérieur. Ainsi, ces dispositifs de verrouillage sont loin d'être inviolables.However, in these devices, the mechanism ensuring the locking of the buffer in its frame is relatively easy access from the outside. Thus, these locking devices are far from inviolable.
Pour résoudre ce problème technique, d'autres dispositifs de verrouillage/déverrouillage pour les tampons de regard de chaussée ont été développés.To solve this technical problem, other locking / unlocking devices for the manhole buffers have been developed.
Par les demandes de brevet
Ces dispositifs sont cependant insatisfaisants en ce qu'ils présentent chacun une réservation d'accès au verrou dans lequel de l'eau et des saletés peuvent s'accumuler. Cette accumulation peut à terme empêcher l'accès au verrou ou le détériorer, que ce soit en raison du gel de l'eau accumulée, de l'encrassement par les déchets ou de l'oxydation des parties métalliques du dispositif.These devices are, however, unsatisfactory in that they each have a lock access reservation in which water and dirt can accumulate. This accumulation can eventually prevent access to the lock or damage, either because of the freezing of water accumulated, fouling by waste or oxidation of the metal parts of the device.
De plus, les dispositifs NORINCO précités ne permettent pas l'introduction d'une sonde explosimètre à travers l'ouverture, comme cela est parfois obligatoire avant de soulever une plaque de protection et tout acte de déverrouillage afin de contrôler la nature et la concentration le taux de gaz à l'intérieur de la chambre située en dessous.In addition, the aforementioned NORINCO devices do not allow the introduction of an explosimeter probe through the opening, as is sometimes required before lifting a protection plate and any act of unlocking to control the nature and the concentration the gas rate inside the room below.
En outre, ces dispositifs présentent de nombreux éléments constitutifs, ce qui augmente considérablement leur coût, et on compte parmi ces éléments de nombreuses pièces fragiles susceptibles de se détériorer, qui risquent d'entraîner des coûts d'entretien, de maintenance et de réparation fréquents et importants.In addition, these devices have many components, which significantly increases their cost, and among these elements are many fragile parts may deteriorate, which may result in frequent maintenance, maintenance and repair costs. and important.
Pour résoudre ces derniers problèmes techniques, le dispositif selon l'invention est habituellement prévu pour des pièces de fonderie à ouvrant présentant un orifice de passage débouchant pour une clé, cet orifice de passage étant non encastrable et offrant dans sa partie centrale un volume traversant dégagé permettant l'introduction éventuelle d'une sonde explosimètre ou de tout autre dispositif, tel que par exemple un câble, un réseau de fibre optique, un dispositif de vision miniature, ou une mini-caméra.To solve these technical problems, the device according to the invention is usually intended for open-ended casting parts having a passage opening opening for a key, this passage opening being non-recessed and having in its central part an open through volume. allowing the possible introduction of an explosimeter probe or any other device, such as for example a cable, an optical fiber network, a miniature vision device, or a mini-camera.
Afin de satisfaire à l'ensemble des différents autres problèmes techniques précédemment mentionnés, le dispositif de verrouillage/déverrouillage de l'invention comprend les moyens suivants :
- un pêne monté coulissant dans un logement entre une position de verrouillage et une position de déverrouillage de l'ouvrant, ledit pêne coulissant comportant un élément d'actionnement en saillie et ledit logement étant fixé à , ou réalisé d'une seule pièce avec, la face de dessous de l'ouvrant ;
- un moyen de rappel élastique forçant le pêne coulissant dans sa position de verrouillage ; et
- une clé de sécurité présentant une tige et un panneton situé à l'extrémité libre de la tige, cette clé étant prévue pour pouvoir être introduite à travers l'orifice de passage pour clé de l'ouvrant de sorte qu'après rotation de celle-ci, le panneton pousse l'élément d'actionnement en saillie du pêne coulissant et déplace le pêne monté coulissant dans sa position de déverrouillage.
- a bolt slidably mounted in a housing between a locking position and an unlocking position of the leaf, said sliding bolt comprising a projecting actuating element and said housing being attached to, or made in one piece with, the underside of the opening;
- an elastic return means forcing the sliding bolt into its locking position; and
- a security key having a rod and a bit located at the free end of the rod, this key being provided to be introduced through the key opening hole of the opening so that after rotation of the ci, the bit pushes the actuating element protruding from the sliding bolt and moves the bolt mounted sliding in its unlocked position.
Il est caractérisé en ce qu'il comprend une bordure en saillie fixée à , ou réalisée d'une seule pièce avec, la face de dessous de l'ouvrant, cette bordure en saillie bordant partiellement le passage pour clé au moins du côté de l'élément d'actionnement en saillie du pêne coulissant, et en ce que le panneton de la clé présente une gorge prévue pour venir porter sur la bordure en saillie pour que la clé soit guidée par la bordure en saillie lors de sa rotation en vue du déplacement du pêne coulissant dans sa position de déverrouillage.It is characterized in that it comprises a projecting edge fixed to or made in one piece with the underside of the opening, this projecting edge partially bordering the key passage at least on the side of the door. actuating element projecting from the sliding bolt, and in that the bit of the key has a groove provided to bear on the projecting edge so that the key is guided by the projecting edge during its rotation for the purpose of moving the sliding bolt in its unlocking position.
On notera que le pêne coulissant du dispositif de verrouillage/déverrouillage de l'invention est généralement prévu pour s'engager dans une gâche rapportée sur le cadre du tampon ou dans tout autre moyen analogue assurant le verrouillage du tampon.Note that the sliding bolt of the locking / unlocking device of the invention is generally provided to engage in a strike reported on the buffer frame or in any other similar means ensuring the locking of the buffer.
Le dispositif de verrouillage/déverrouillage de l'invention ne présente aucun moyen accessible par le dessus de l'ouvrant, il n'est donc pas fracturable depuis l'extérieur.The locking / unlocking device of the invention has no means accessible from the top of the opening, so it is not fracturable from the outside.
De plus, la bordure en saillie servant de guide pour la clé protège également l'accès à l'élément d'actionnement en saillie du pêne coulissant, empêchant ainsi l'actionnement du dispositif en ouverture par un outil autre que la clé de sécurité du dispositif selon l'invention. Cette bordure en saillie occulte également l'élément d'actionnement en saillie du pêne coulissant pour que ce dernier ne soit pas visible depuis l'extérieur, ce qui renforce encore son inviolabilité. Enfin, la bordure en saillie empêche le panneton de la clé de passer lorsque la clé est tournée dans le mauvais sens, et présente donc une partie libre prévue pour laisser passer le panneton de la clé uniquement lorsqu'elle est tournée dans le bon sens. Elle remplit donc le rôle avantageux de détrompeur.In addition, the protruding edge serving as a guide for the key also protects the access to the actuating element protruding from the sliding bolt, thus preventing the opening of the device by a tool other than the security key of the key. device according to the invention. This projecting edge also obscures the actuating element protruding from the sliding bolt so that the latter is not visible from the outside, which further enhances its inviolability. Finally, the projecting edge prevents the bit of the key from passing when the key is rotated in the wrong direction, and therefore has a free portion provided to let the bit key bit only when turned in the right direction. It thus fulfills the advantageous role of deceptive.
Ainsi, le forçage du dispositif de l'invention avec un outil usuel, comme par exemple un tournevis, est impossible car le dispositif ne présente aucun accès sur la zone qui actionne le verrou. On notera d'ailleurs qu'une inviolabilité de vingt minutes a été testée par une organisation indépendante pour le dispositif de verrouillage/déverrouillage de l'invention.Thus, forcing the device of the invention with a conventional tool, such as a screwdriver, is impossible because the device has no access to the area that actuates the lock. It will be noted moreover that a twenty-minute inviolability has been tested by an independent organization for the locking / unlocking device of the invention.
Le pêne monté coulissant peut être facilement actionné en ouverture depuis sa sous face, en actionnant par exemple manuellement l'élément d'actionnement en saillie, ce qui permet à toute personne accidentellement enfermée d'ouvrir facilement l'ouvrant.The slidably mounted bolt can be easily actuated opening from its underside, for example by manually actuating the projecting actuating element, which allows anyone inadvertently locked easily open the opening.
Le moyen de rappel élastique forçant le pêne coulissant est préférentiellement du type poussoir à effet ressort évitant le déverrouillage par vibration au passage de véhicules et permettant en outre un réglage précis de la force à appliquer à l'ouverture du verrou.The elastic return means forcing the sliding bolt is preferably of the spring-loaded push-button type which avoids unlocking by vibration when passing vehicles and furthermore allows precise adjustment of the force to be applied when the bolt is opened.
Enfin, la clé elle-même présente une ergonomie avantageuse et est d'une conception étudiée permettant de s'en servir comme poignée de manutention ou de l'accrocher à la ceinture pour la conserver rapidement et facilement disponible.Finally, the key itself has an advantageous ergonomics and is of a design designed to use it as a handle or hang on the belt to keep it quickly and easily available.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, description faite en référence aux dessins annexés, dans lesquels :
- la
figure 1 est une vue partielle en perspective de dessus d'un tampon pivotant de regard de chaussée en position ouverte, équipé d'un dispositif de verrouillage/déverrouillage de l'invention et dans lequel on a introduit la clé amovible de sécurité du dispositif de l'invention ; - la
figure 2 est une vue en coupe de profil d'un tampon pivotant de regard de chaussée en position fermée, équipé d'un dispositif de verrouillage/déverrouillage de l'invention et dans lequel on a introduit la clé amovible de sécurité du dispositif de l'invention ; - la
figure 3 est une vue d'ensemble en perspective d'une clé amovible de sécurité pour le dispositif de l'invention ; - la
figure 4 est une vue d'ensemble en perspective d'un téton pour le dispositif selon l'invention ; - la
figure 5 est une vue d'ensemble en perspective d'un pêne coulissant pour le dispositif selon l'invention ; - la
figure 6 est une vue d'ensemble en perspective d'un ressort pour le dispositif selon l'invention ; - la
figure 7 est une vue partielle en perspective de dessous d'un tampon pivotant illustrant le montage d'un pêne, d'un ressort et d'un téton selon l'invention sur la sous face dudit tampon ; et - les
figures 8 à 13 sont des vues de détail de dessous d'un tampon équipé du dispositif de verrouillage/déverrouillage de l'invention, ces figures illustrant des séquences de déverrouillage du tampon au moyen de la clé amovible de sécurité du dispositif de l'invention.
- the
figure 1 is a partial perspective view from above of a swivel buffer for the pavement manhole in the open position, equipped with a locking / unlocking device of the invention and in which has introduced the removable security key device of the invention; - the
figure 2 is a sectional sectional view of a pivoting pad of the pavement manhole in the closed position, equipped with a locking / unlocking device of the invention and into which the removable security key of the device of the invention has been introduced. ; - the
figure 3 is an overall perspective view of a removable security key for the device of the invention; - the
figure 4 is an overall perspective view of a stud for the device according to the invention; - the
figure 5 is an overall perspective view of a sliding bolt for the device according to the invention; - the
figure 6 is an overall perspective view of a spring for the device according to the invention; - the
figure 7 is a partial perspective view from below of a pivoting buffer illustrating the mounting of a bolt, a spring and a pin according to the invention on the underside of said buffer; and - the
Figures 8 to 13 are detail views from below of a buffer equipped with the locking / unlocking device of the invention, these figures illustrating unlocking sequences of the buffer by means of the removable security key of the device of the invention.
Le dispositif de verrouillage/déverrouillage selon la présente invention va maintenant être décrit de façon détaillée en référence aux
On définira dans la suite de cette description les notions de haut et de bas, d'inférieur et de supérieur, etc. en fonction de l'orientation adoptée par le tampon amovible ou pivotant de regard de chaussée et par le dispositif de verrouillage/déverrouillage de l'invention en mode normal d'utilisation, c'est-à -dire lorsque le tampon est logé dans la chaussée et qu'un dispositif de verrouillage/déverrouillage de l'invention est monté sur sa face inférieure, le pêne coulissant de verrouillage étant à l'horizontale dans son logement. Il est évident que cette orientation ne sera pas forcément conservée en utilisation.In the rest of this description we shall define the notions of high and low, of inferior and superior, etc. depending on the orientation adopted by the removable buffer or swivel manhole and by the locking / unlocking device of the invention in normal use mode, that is to say when the buffer is housed in the and a locking / unlocking device of the invention is mounted on its underside, the locking slide bolt being horizontal in its housing. It is obvious that this orientation will not necessarily be kept in use.
Comme représenté sur les différentes figures, le dispositif de verrouillage/déverrouillage 1 de l'invention est préférentiellement prévu pour être monté sur la face inférieure 2 d'une pièce de fonderie 3, par exemple d'un tampon 4 de regard de chaussée, à ouvrant amovible ou pivotant, ledit dispositif de verrouillage/déverrouillage 1 étant également prévu pour être actionné par une clé amovible 5 de verrouillage/déverrouillage.As shown in the various figures, the locking / unlocking
La pièce de fonderie 3 peut être un tampon 4 de regard de chaussée ou analogue dont l'ouvrant 6 est monté amovible ou pivotant sur un châssis fixe 7 en forme de cadre à sceller par exemple sur le bord d'un regard d'une trappe d'accès dans une chaussée, une cour ou analogue.The casting part 3 may be a buffer 4 of manhole or the like whose
La pièce de fonderie 3 présente un orifice de passage débouchant 8 pour une clé, par exemple sous la forme classique d'un orifice circulaire 9 prolongé radialement par un oblong 10. Cet orifice de passage 8 est non encastrable et offre dans sa partie centrale un volume traversant dégagé permettant l'introduction éventuelle d'une sonde ou autre.The casting part 3 has a through
Le dispositif de verrouillage/déverrouillage 1 à inviolabilité améliorée selon l'invention comprend un pêne 11 monté coulissant dans un logement 12, un moyen de rappel élastique 13, une clé amovible 5 de sécurité et une bordure en saillie 14 solidarisée à la sous face 2 de l'ouvrant 6 de la pièce de fonderie 3.The locking / unlocking
Le pêne coulissant 11 est monté à coulissement dans un logement 12 entre une position de verrouillage et une position de déverrouillage de l'ouvrant 6. Selon le mode de réalisation préféré de l'invention, le pêne coulissant 11 est en fonte et sa position de verrouillage correspond à une position sortie de celui-ci.The sliding
Le pêne coulissant 11 se présente préférentiellement sous la forme d'un pêne classique en fonte, c'est-à -dire sous la forme d'un parallélépipède dont la partie d'extrémité avant est biseautée. Il peut également présenter un ou plusieurs éléments de guidage en coulissement 15 et au moins un élément d'actionnement 16. Les éléments de guidage 15 sont préférentiellement en saillie et peuvent être logés à coulissement dans un oblong de guidage 17 prévu dans le logement 12. Ils servent à guider le pêne 11 lors de son coulissement en verrouillage ou en déverrouillage. Chaque élément d'actionnement 16 sert à faire coulisser le pêne 11 en position de verrouillage ou de déverrouillage lorsqu'il est sollicité. Selon le mode de réalisation préféré de l'invention, dans sa partie d'extrémité arrière 18, le pêne coulissant 11 présente une tige de guidage longitudinal 19 et une prolongation latérale d'actionnement 20 (
Le pêne coulissant 11 comporte en outre un élément d'actionnement 16 en saillie qui fait coulisser le pêne 11 entre une position de verrouillage et une position de déverrouillage lorsqu'il est actionné. Selon le mode de réalisation préféré de l'invention, l'élément d'actionnement 16 en saillie est un téton 21 en acier inoxydable (
Le logement 12 présente préférentiellement des flancs de guidage 23 pour le pêne 11 et une ouverture 24 à travers laquelle le pêne 11 coulisse entre une position de verrouillage et une position de déverrouillage.The
De manière générale, le logement 12 dans lequel est monté le pêne coulissant 11 peut présenter divers orifices 25 prévus pour être traversés par le ou les éléments de guidage en coulissement 15 et le ou les éléments d'actionnement 16 du pêne 11.In general, the
Selon le mode de réalisation préféré de l'invention, le logement 12 présente un orifice 26 prévu pour être traversé par la tige de guidage 19 du pêne 11 et un oblong 22 prévu pour être traversé par le téton d'actionnement 21 en saillie du pêne 11.According to the preferred embodiment of the invention, the
Ce logement 12 est solidarisé à la sous face 2 de l'ouvrant 6, à savoir fixé à , ou réalisé d'une seule pièce avec, la sous face 2 de l'ouvrant 6.This
Le moyen de rappel élastique 13 force le pêne coulissant 11 dans sa position de verrouillage. Selon le mode de réalisation préféré de l'invention, il s'agit d'un ressort 27 en acier inoxydable (
La clé amovible 5 de sécurité présente une tige 29 et un panneton 41 situé à l'extrémité libre 30 de la tige 29. Elle est prévue pour pouvoir être introduite à travers l'orifice de passage 8 pour clé de l'ouvrant 6 de sorte qu'après rotation de celle-ci, le panneton 41 pousse l'élément d'actionnement 16 en saillie du pêne coulissant 11 et déplace ainsi le pêne 11 monté coulissant dans sa position de déverrouillage.The
Comme représenté sur la
Selon le mode de réalisation préféré de l'invention, la clé amovible 5 de sécurité comporte une poignée de manutention 32 montée sur sa tige 29 à l'opposé du panneton 41. Ainsi, lorsque le dispositif de verrouillage/déverrouillage 1 est en position d'ouverture, la clé 5 peut alors faire office de poignée pour manoeuvrer le tampon 4 en ouverture ou en fermeture.According to the preferred embodiment of the invention, the
Selon le mode de réalisation préféré de l'invention, à la base de la poignée 32, la clé 5 peut également comporter une bague d'appui 33 sur la tige 29, qui est prévue pour arriver en butée sur le pourtour externe 34 de l'orifice de passage 8 de clé lorsque la clé 5 est introduite dans cet orifice. La position de cette bague d'appui 33 sur la tige 29 est prévue de sorte qu'en position de butée de la bague d'appui 33 contre la face externe 35 de l'ouvrant 6, le panneton 41 de la clé 5 arrive sensiblement à la même hauteur que l'élément d'actionnement 16 du pêne 11.According to the preferred embodiment of the invention, at the base of the
En ce qui concerne la bordure en saillie 14, celle-ci est solidarisée à la sous face 2 de l'ouvrant 6, à savoir fixée à , ou réalisée d'une seule pièce avec, la sous face 2 de l'ouvrant 6. La bordure en saillie 14 borde partiellement le passage pour clé 8, au moins sur le côté du passage pour clé 8 situé au plus près de l'élément d'actionnement 16 en saillie du pêne coulissant 11. Elle présente une partie libre prévue pour laisser passer le panneton 41 de la clé 5 lorsque celle-ci est tournée dans le bon sens.With regard to the projecting
Selon le mode de réalisation préféré de l'invention, la bordure en saillie 14 présente un profil en coupe de forme sensiblement carrée, rectangulaire ou trapézoïdale, par exemple avec une épaisseur comprise entre 2 mm et 10 mm, et plus préférentiellement comprise entre 4 mm et 6 mm. Elle est affecte une forme générale en point d'interrogation ou en crosse dont la partie rectiligne 36 borde la partie rectiligne 37 d'un côté de l'orifice de passage 8 pour clé lorsque celui-ci se présente sous la forme classique d'un orifice circulaire 9 prolongé radialement par un oblong 10.According to the preferred embodiment of the invention, the projecting
Le montage du dispositif de verrouillage/déverrouillage 1 à inviolabilité améliorée de l'invention est extrêmement simple et ne nécessite l'utilisation d'aucun outil particulier. Il est représenté sur la
Selon le mode de réalisation préféré de l'invention, le moyen de rappel élastique 13 est un ressort 27 qui est monté à coulissement sur la tige de guidage longitudinal 19 prévue à l'arrière du pêne 11 avant l'introduction de l'ensemble dans le logement 12. Un téton 21 en acier inoxydable est alors introduit à travers un oblong 22 prévu dans le logement 12, puis monté en saillie par vissage ou emboutissage sur le pêne coulissant 11, au niveau de sa prolongation latérale d'actionnement 20 qui présente à cet effet un orifice 38 pouvant être fileté. Selon le mode de réalisation préféré de l'invention, ce téton d'actionnement 21 remplit alors à la fois le rôle d'élément d'actionnement 16 manuel ou mécanique pour la clé 5 et d'élément de guidage 15 pour le pêne 11, et empêche l'extraction totale du pêne 11 hors de son logement 12.According to the preferred embodiment of the invention, the elastic return means 13 is a spring 27 which is slidably mounted on the
De manière générale, dans sa position de repos, le pêne 11 est positionné dans le logement 12 pour que sa partie biseautée 39 se trouve légèrement en saillie hors du logement 12. Ainsi, lorsque l'ouvrant 6 de la pièce de fonderie 3 est pivoté ou placé en position de fermeture, la partie biseautée 39 du pêne 11 sert de rampe de glissement pour le pêne 11 contre le bord du châssis fixe 7 en forme de cadre de la pièce de fonderie 3, pour que le pêne 11 soit forcé en arrière dans son logement 12 avant de reprendre sa position de verrouillage lorsque l'ouvrant 6 de la pièce de fonderie 3 est en position fermée, à la manière dont on claque une porte. Ainsi, le dispositif de verrouillage/déverrouillage 1 de l'invention est à verrouillage automatique.Generally, in its rest position, the
Tout comme son montage, l'utilisation du dispositif de verrouillage/déverrouillage 1 selon le mode de réalisation préféré de l'invention de l'invention est extrêmement simple. Lorsque l'ouvrant 6 de la pièce de fonderie 3 est fermé et verrouillé (
La fermeture du tampon 4 peut ensuite se faire de deux manières. Soit en effectuant les étapes précédentes dans l'ordre inverse, soit en retirant la clé 5 après l'avoir tournée en sens antihoraire pour la libérer et en laissant retomber l'ouvrant 6 par son propre poids, ce dernier étant alors verrouillé par l'effet de verrouillage automatique du dispositif 1 de l'invention.The closure of the buffer 4 can then be done in two ways. Either by performing the preceding steps in the reverse order, or by removing the key 5 after turning it counterclockwise to release it and letting the
De manière évidente, l'invention ne se limite pas aux modes de réalisation préférentiels décrits précédemment et représentés sur les différentes figures, l'homme du métier pouvant y apporter de nombreuses modifications et imaginer d'autres variantes sans sortir ni de la portée, ni du cadre de l'invention.Obviously, the invention is not limited to the preferred embodiments described above and shown in the various figures, the skilled person can make many modifications and imagine other variants without departing from the scope and of the scope of the invention.
De même, bien que le dispositif de verrouillage/déverrouillage à inviolabilité améliorée de l'invention ait ici été décrit pour un tampon de regard de chaussée, il sera évident pour l'homme du métier de l'adapter à toutes sortes de pièces de fonderie et d'équipements de voirie de type tampons, regard de chaussés, trappes, etc.Likewise, although the improved tamper-evident locking / unlocking device of the invention has here been described for a manhole buffer, it will be obvious to one skilled in the art to adapt it to all kinds of foundry pieces. and road equipment such as tampons, pavement, hatches, etc.
Claims (12)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1000861A FR2957109A1 (en) | 2010-03-03 | 2010-03-03 | LATCHING / UNLOCKING DEVICE WITH IMPROVED INVIOLABILITY AND ITS BUFFER KEY AND OPENING FOUNDRY PART |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2363555A1 true EP2363555A1 (en) | 2011-09-07 |
EP2363555B1 EP2363555B1 (en) | 2013-05-08 |
Family
ID=42827381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20110156804 Active EP2363555B1 (en) | 2010-03-03 | 2011-03-03 | Locking/unlocking device with improved tamper resistance |
Country Status (2)
Country | Link |
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EP (1) | EP2363555B1 (en) |
FR (1) | FR2957109A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3016652A1 (en) * | 2014-01-21 | 2015-07-24 | Prod Ind Lorrains | INVIOLABLE LOCKING AND UNLOCKING DEVICE WITH REMOVABLE KEY FOR OPENING |
FR3025231A1 (en) * | 2014-08-28 | 2016-03-04 | Fond De Brousseval & Montreuil | ASSEMBLY SYSTEM FOR ACCESSORIES FOR FOUNDRY PART |
IT202100010874A1 (en) * | 2021-04-29 | 2022-10-29 | Fond Belli S R L | KEY/LOCK ASSEMBLY OF A ROAD MANHOLE MANHOLE |
US11761165B1 (en) * | 2023-02-27 | 2023-09-19 | David M. Stadler | Manhole cover |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE377164C (en) * | 1921-05-25 | 1923-06-11 | Herkos Werk | safety lock |
FR2376919A1 (en) | 1977-01-05 | 1978-08-04 | Dumortier Robert | LOCKING DEVICE FOR PAVEMENT MANIFOLD OR OTHER |
JPS56100551U (en) * | 1979-12-28 | 1981-08-07 | ||
US5564860A (en) | 1994-03-22 | 1996-10-15 | Abt, Inc. | Fixture for attaching a grate to a drainage channel |
FR2780996A1 (en) | 1998-07-10 | 2000-01-14 | Norinco | DEVICE FOR LOCKING AND UNLOCKING WITH A KEY OF A BUFFER ON A FRAME |
EP1593780A1 (en) | 2004-04-15 | 2005-11-09 | Norinco | Locking device for a manhole |
EP1911888A2 (en) * | 2006-10-10 | 2008-04-16 | TBS Soest b.v. | Closing device and method for closing a hole in the ground |
-
2010
- 2010-03-03 FR FR1000861A patent/FR2957109A1/en not_active Withdrawn
-
2011
- 2011-03-03 EP EP20110156804 patent/EP2363555B1/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE377164C (en) * | 1921-05-25 | 1923-06-11 | Herkos Werk | safety lock |
FR2376919A1 (en) | 1977-01-05 | 1978-08-04 | Dumortier Robert | LOCKING DEVICE FOR PAVEMENT MANIFOLD OR OTHER |
JPS56100551U (en) * | 1979-12-28 | 1981-08-07 | ||
US5564860A (en) | 1994-03-22 | 1996-10-15 | Abt, Inc. | Fixture for attaching a grate to a drainage channel |
FR2780996A1 (en) | 1998-07-10 | 2000-01-14 | Norinco | DEVICE FOR LOCKING AND UNLOCKING WITH A KEY OF A BUFFER ON A FRAME |
EP1593780A1 (en) | 2004-04-15 | 2005-11-09 | Norinco | Locking device for a manhole |
EP1911888A2 (en) * | 2006-10-10 | 2008-04-16 | TBS Soest b.v. | Closing device and method for closing a hole in the ground |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3016652A1 (en) * | 2014-01-21 | 2015-07-24 | Prod Ind Lorrains | INVIOLABLE LOCKING AND UNLOCKING DEVICE WITH REMOVABLE KEY FOR OPENING |
FR3025231A1 (en) * | 2014-08-28 | 2016-03-04 | Fond De Brousseval & Montreuil | ASSEMBLY SYSTEM FOR ACCESSORIES FOR FOUNDRY PART |
IT202100010874A1 (en) * | 2021-04-29 | 2022-10-29 | Fond Belli S R L | KEY/LOCK ASSEMBLY OF A ROAD MANHOLE MANHOLE |
EP4083331A1 (en) * | 2021-04-29 | 2022-11-02 | Fonderie Belli S.r.l. | Street manhole cover with key/lock assembly |
US11761165B1 (en) * | 2023-02-27 | 2023-09-19 | David M. Stadler | Manhole cover |
Also Published As
Publication number | Publication date |
---|---|
FR2957109A1 (en) | 2011-09-09 |
EP2363555B1 (en) | 2013-05-08 |
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