EP3394347B1 - Trappe d'accès - Google Patents

Trappe d'accès Download PDF

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Publication number
EP3394347B1
EP3394347B1 EP16876994.1A EP16876994A EP3394347B1 EP 3394347 B1 EP3394347 B1 EP 3394347B1 EP 16876994 A EP16876994 A EP 16876994A EP 3394347 B1 EP3394347 B1 EP 3394347B1
Authority
EP
European Patent Office
Prior art keywords
frame
access hatch
opening
grate segments
configuration
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.)
Active
Application number
EP16876994.1A
Other languages
German (de)
English (en)
Other versions
EP3394347A4 (fr
EP3394347C0 (fr
EP3394347A1 (fr
Inventor
Nathan Charles CRUICKSHANK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parkwood Investments Pty Ltd
Original Assignee
Parkwood Investments Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2015905315A external-priority patent/AU2015905315A0/en
Application filed by Parkwood Investments Pty Ltd filed Critical Parkwood Investments Pty Ltd
Publication of EP3394347A1 publication Critical patent/EP3394347A1/fr
Publication of EP3394347A4 publication Critical patent/EP3394347A4/fr
Application granted granted Critical
Publication of EP3394347C0 publication Critical patent/EP3394347C0/fr
Publication of EP3394347B1 publication Critical patent/EP3394347B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • E02D29/1463—Hinged connection of cover to frame
    • 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
    • E02D29/127—Manhole shafts; Other inspection or access chambers; Accessories therefor with devices for impeding fall or injuries of persons
    • 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
    • E02D29/1454—Non-circular covers, e.g. hexagonal, elliptic

Definitions

  • the present invention relates to an access hatch for an opening such as that of a sub- surface facility. More particularly, but not exclusively, the invention relates to an access hatch for an opening of a pump station.
  • Sub-surface facilities such as pump stations require occasional access for inspection and or servicing of equipment. When not in use, it is important that an opening for the facility be securely covered to prevent accidental or unauthorised access to the facility and/or equipment housed therein.
  • US 6644342 B1 discloses a modular well for a wastewater lift station that includes multiple well sections. Each of the well sections has at least one mating feature allowing it to be joined to at least one other well section and to form a liquid tight seal. The well is formed by vertically mating the well sections together. One of the well sections has an inlet opening, and the same or a different well section has at least one outlet opening.
  • US 4266380 A discloses a high strength cover for an underground utility box of the type that is normally installed on streets and driveways and is subjected to substantial vehicle loads.
  • the cover structure includes a fixed rectangular frame the upper edge of which is installed substantially flush with the ground level. Below the ground level the frame defines bearing surfaces throughout the periphery of the frame, the inner edge of the bearing members defining the access opening.
  • Two structural frameworks, dimensioned to be, in combination, substantially coextensive with the access opening are provided to span the bearing surfaces.
  • the frameworks have sufficient vertical dimensions to afford the necessary strength.
  • the frameworks are hinged for pivotal movement about axes along two opposite ends of the frame so that they can be moved to an upright position to afford access to the box.
  • Hingedly mounted on a side edge which extends between the end edges of the frame are two cover plates which in combined outlinear form cover the access opening.
  • the cover plates are impervious so as to close the access opening and when closed are supported by the subjacent frameworks.
  • the cover plates are also provided with brackets which engage the frameworks in the upstanding position so as to form a barrier around three sides of the opening when access to the box is desired.
  • US 6640495 B1 discloses an access hatch comprising a frame, a grate, and a pull member pivotally coupled to the grate.
  • the frame contains an access opening.
  • the grate has a near side and a far side. The near side is coupled to the frame for pivotal movement of the grate between a closed and an open position. In the closed position, the grate lies substantially in the access opening of the frame and blocks at least a portion of the opening. In the open position, the grate is oriented away from the opening of the frame to allow access through the opening.
  • the pull member has a proximal end and a distal end.
  • the distal end is pivotally coupled to the grate near the far side of the grate, such that the proximal end is moveable away from the grate from a rest position.
  • the proximal end extends substantially to the near side of the grate when the proximal end is in the rest position.
  • the proximal end is normally in the rest position when the grate is in the closed position.
  • a worker, intending to open the grate is prompted to stand at the near side of the grate and grasp the proximal end of the pull member, to pull the grate to the open position.
  • FR 2639383 A1 discloses an inspection hatch for underground pipe work of the type comprising a frame of rectangular overall shape intended to be sealed to the edge of the opening of the inspection port with two leaves mounted so that they can tilt on two opposite sides of the frame, characterised in that it comprises two grids mounted so that they are articulated on the frame on two opposite sides adjacent to the ones on which the leaves are articulated, the said grids being mounted so that they are capable of occupying a closed position in which they rest on one another and an open position in which they extend substantially vertically, means being provided for connecting the leaves and the grids in the open position.
  • US 5941024 A discloses a floor hatch with a built-in security fence, where access to the understructure can only be provided wherein a pair of doors are pivoted outwardly to an open position and secured, forming two opposite sides of the security fence; a first gate is pivoted outwardly to an open position and secured to each of the doors, forming the rear of the security fence and a second gate, leaving a pivoting door, is pivoted outwardly and secured to each of the doors forming the front of the security fence.
  • the pivoting door of the second gate pivots outwardly to permit access to the opening in the floor.
  • the floor hatch may also include a security grate and telescoping extension on each of the doors. The floor hatch can be locked in the closed position and can be opened, automatically forming a security fence, to permit access to an understructure of a floor.
  • Examples of the invention seek to solve, or at least ameliorate, one or more disadvantages of previous access hatches.
  • an access hatch for an opening such as that of a sub-surface facility
  • the access hatch having a frame for fitting to the perimeter of the opening, a cover lid pivotally coupled to the frame, and grate segments in pivotable relationship with the frame, wherein the grate segments form two separate sub assemblies, each sub assembly including two collapsible grate segments pivotally connected together, such that the access hatch is manoeuvrable between: a first configuration in which the grate segments extend across the opening and the cover lid is pivoted into a closed position in which it at least substantially covers the grate segments and denies access to the opening;
  • the lid in the second configuration, is preferably pivotable to a substantially upright position.
  • the grate segments are pivotally coupled to the frame.
  • the grate segments are secured within the frame to support the weight of a person.
  • apertures formed in the grate segments are sized to allow visual inspection through the grate segments.
  • structural members of the grate segments are aligned when in the second configuration.
  • the access hatch can further comprise a roller on a free end of the or each grate segment for supporting the weight thereof in the third configuration.
  • the access hatch may further include a plurality of extension members extending from the grate segments to increase the height of the barrier.
  • the lid is lockable to the frame.
  • the lid may be formed in two parts lockable together.
  • an access hatch 10 is shown according to a preferred embodiment of the present invention.
  • the access hatch 10 is configured for covering an opening such as that of a sub-surface facility.
  • An example of such a facility is a pump station.
  • the hatch 10 has a frame 12 for fitting to the perimeter of the opening, a cover lid 14 pivotally coupled to the frame 12, and grating 16 in pivotable relationship with the frame 12.
  • the hatch 10 is manoeuvrable between multiple configurations for varying the level of access to the opening.
  • lid 14 is formed in two components 14a, 14b and grating 16 is formed in segments 16a, 16b, 16c, 16d.
  • the lid 14 and grating 16 cooperate to, in use, form a barrier around the opening and restrict access thereto.
  • the hatch 10 is provided with an upright gated portion 20 for selectively opening and closing the barrier to allow and restrict access to the opening respectively.
  • a gated portion 20 is formed in each of grating segments 16b, 16c, though it may be formed in only other of the grating segments. In other forms, the gated portion 20 may be formed in the lid 14.
  • the hatch 10 is movable through open to closed configurations, as will be described further below in relation to Figures 1 to 3 .
  • Figure 3 illustrates a closed or first configuration in which the grating 16 extends across the opening and the cover lid 14 is pivoted into a closed position in which it at least substantially covers the grating 16 and denies access to the opening.
  • the lid 14 is locked to the frame or grating 16 via lock 22 so as to prevent unauthorised access to the opening.
  • the lid 14 is formed in two parts so as to reduce the weight of components a user has to handle.
  • lock 22 is configured to lock the lid 14 to grating 16.
  • FIG. 2 illustrates a second or intermediate configuration in which the lid 14 is pivoted to uncover the grating to allow inspection of and/or limited access to the facility.
  • the lid 14 is pivotable to a substantially upright position.
  • lid parts 14a, 14b are each provided with a stay 24.
  • Stays 24 may be pivotably coupled to the frame and provided with a boss for sliding engagement with a slot formed in the lid parts 14a, 14b.
  • the slot preferably has a catch or notch formed therein to retain the lid 14 in the open configuration.
  • the grating 16 is secured within the frame 12 to support the weight of a person.
  • the frame 12 may be formed with a flange or shoulder upon which the grating 16 rests to support it in a substantially horizontal position. In this condition, a user has limited access to equipment within the facility, as will be explained further below.
  • FIG 1 illustrates the hatch 10 in a third configuration in which the grating 16 and lid 14 are moved into substantially upright positions so as to form a barrier around the opening.
  • lid parts 14a and 14b and grating segments 16a, 16b, 16c and 16d cooperate to form the barrier.
  • the barrier is generally continuous so as to restrict access to the facility.
  • the hatch 10 also enables a gate like access whereby one side of the opening can be accessed at a time whilst still protecting the opposite side.
  • Gated portion 20 formed in grating portion 16c is provided with a locking bolt 26 that cooperates with the frame to lock the gated portion 20 in position.
  • a support block 28 may also be provided for supporting the gated portion 20 and/or locking the gated portion 20 in a closed position.
  • a locking bolt 26 and support block 28 may be provided for each gated portion 20.
  • the gated portion may be configured to be releasably securable with other grate segments.
  • the grating 16 includes a plurality of grate segments 16a, 16b, 16c, 16d which are substantially parallel with each other when the hatch 10 is in the first and second configurations in which the grating is horizontally inclined and received against the frame 12.
  • the grate segments 16a, 16b, 16c, 16d are pivotable from the frame 12 in the third configuration in which the segments 16a, 16b, 16c, 16d define sides of the barrier.
  • the grating 16 is formed in two separate sub assemblies 30a, 30b, each assembly including two collapsible grate segments 16 pivotally connected together.
  • sub assembly 30a includes grate segments 16a and 16b and sub assembly 30b includes grate segments 16c and 16d.
  • Each subassembly 30a, 30b is pivotally coupled to the frame so that, in use, an operator will grasp and lift an uppermost portion of the sub assembly, which will swing upwards.
  • the grating members of the subassembly can be pivoted apart and arranged at approximately 90 degrees to each other to form a part of the barrier.
  • Each sub assembly may be provided with a lifting handle or marked location to show a best lifting position. In use, grate segments 16b and 16c are lifted first by a user.
  • the hatch may include only 3 or more than 4 portions.
  • the grating may include one grating subassembly and a further grate segment.
  • the additional portions may be formed into the grating subassemblies as further segments collapsible with a respective subassembly or they may simply pivot upwardly from the lid 12.
  • the grate segments 16a, 16b, 16c, 16d are formed of substantially perpendicular strip members, that may be formed of aluminium. Between the strip members, apertures are formed.
  • the grate segments 16a, 16b, 16c, 16d are configured so that the apertures, which are sized to allow visual inspection through the grating, are aligned when in the second configuration so as to minimise visual obstruction.
  • the strip members may be configured so that the size of the apertures is sufficient for an operator to reach through to withdraw float switches and access instruments without having to raise the grating.
  • the grating 16 may further include a plurality of extension members (not shown) extending from the grating 16 to increase the height of the barrier.
  • the extension members may be telescopic and retractable for moving the grating between the first and third configurations.
  • FIG. 5 illustrates a close view of self locking feature 40 illustrated in Figure 1 .
  • lid parts 14a, 14b are each formed with catch 42 extending therefrom and configured for cooperation with lever 44 formed on grating parts 16a, 16d.
  • lever 44 When moved into the third or open condition, lever 44 is brought into contact with catch 42 to secure a respective lid part 14a, 14b with a corresponding grating part 16a, 16b.
  • Lever 44 may be resiliently biased upwardly or downwardly, using a spring for example, so as to be releasably operable as required. It will be appreciated that other releasable locking means may be provided.
  • the frame 12 is preferably formed of aluminium extrusions and configured to be generally flush mounting with a ground surface.
  • Frame 12 includes a surround 13 configured to cover an edge of the opening.
  • the frame 12 and surround 13 may be integrally formed of an aluminium extrusion.
  • the frame 12 and surround 13 are configured so that the lid extends less than 18mm above the surface in which the opening is formed, thereby reducing tripping hazards when the hatch 10 is not in use.
  • a cushion gasket 48 is provided between the lid 14 and the frame 12.
  • the cushion gasket 48 may be provided to cushion against slamming and may also have the purpose of preventing odour escaping from the subsurface chamber, as well as preventing stormwater ingress due to flooding or excessive stormwater runoff.
  • the hatch 10 is formed of non-corrosive materials such as aluminium.
  • Surround 13 is preferably formed of extruded aluminium sections joined together at the corners of the hatch 10. The extruded sections are preferably formed from heavy duty aluminium.
  • the frame 12/surround 13 is configured to form a continuous hinge with lid 14, as illustrated in Figure 9 .
  • the hatch 10 can sit generally flush with a ground surface to reduce tripping hazards.
  • the lid 14 is preferably formed of chequer plate aluminium.
  • the hatch 10 may be provided with an apparatus to enable monitoring or testing of equipment in the environment in the facility, such as a gas sampling box 50, that may be externally accessible.
  • a gas sampling box 50 that may be externally accessible.
  • an access hatch 110 according to another preferred embodiment of the present invention.
  • the access hatch 110 is also configured for covering an opening such as that of a sub-surface facility.
  • Access hatch 110 has many features in common with previously described access hatch 10. For convenience, like features have been indicated in the Figures with like reference numerals incremented by 100 and the preceding description is intended to apply, except as indicated below.
  • access hatch 110 is formed with telescopic extension members forming liftable upper rail segments 117a, 117b, 177c, 177d extending from respective grating segments 116a, 116b, 116c, 116d.
  • Spring loaded buttons 119 are provided to retain the upper rail segments in a lifted condition once raised.
  • Telescopic extension members may be provided for applications having small grating sections that, when erected, do not form a barrier of sufficient height to provide adequate safety.
  • access hatch 110 is also provided with an alternatively configured self locking feature 140 on either side thereof.
  • Each self locking feature 140 includes a member 142 extending from the lid and having a hole formed therein, through which a drop lock pin 145 can be received. Once the drop lock pin 145 has been received through the hole in member 142, it can be rotated to lock the grating 116a or 116d to a respective lid part 114a, 114b.
  • the drop lock pin 145 may be mounted on a threaded insert that can be screwed into a corresponding aperture formed in the grating segment and two stainless steel spacers 147 can be provided as required.
  • Figure 14 illustrates a roller 152 provided on a free end of the or each section of grating 116 for supporting the weight of the grating when the access hatch 110 is in the third configuration.
  • the roller 152 is mounted to a lower surface of the grating 116 via a stainless steel pin bolt set and configured to roll over an upper surface of surround 113 to support the weight of the grating 116 when opening and closing the grating segment.
  • Figure 15 illustrates further detail of a slide mounting for stay 124, which is mounted to support gusset 125 extending from surround 113, via sliding shoulder bolt 127, sliding washer 129 and sliding washer 131.
  • a slide mounting for stay 124 which is mounted to support gusset 125 extending from surround 113, via sliding shoulder bolt 127, sliding washer 129 and sliding washer 131.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Sewage (AREA)
  • Tents Or Canopies (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Claims (11)

  1. Une trappe d'accès (10 ; 110) pour une ouverture telle que celle d'une installation souterraine, la trappe d'accès (10 ; 110) comprenant un cadre (12) destiné à prendre place sur le pourtour de l'ouverture, un couvercle de recouvrement (14) relié de manière pivotante au cadre (12), et des segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) en relation pivotante avec le cadre (12), les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) formant deux sous-ensembles séparés (30a, 30b), chaque sous-ensemble (30a, 30b) comprenant deux segments de grille pliables (16a, 16b, 16c, 16d) reliés ensemble de manière pivotante, de sorte que la trappe d'accès (10 ; 110) est manoeuvrable entre :
    une première configuration dans laquelle les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) s'étendent à travers l'ouverture et le couvercle de recouvrement (14) est pivoté dans une position de fermeture dans laquelle il recouvre au moins sensiblement les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) et interdit l'accès à l'ouverture ;
    une deuxième configuration dans laquelle le couvercle de recouvrement (14) est pivoté pour découvrir les segments de grille (16a, 16b, 16c, 16d) afin de permettre l'inspection de l'installation ; et
    une troisième configuration dans laquelle les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) et le couvercle de recouvrement (14) sont déplacés dans des positions sensiblement verticales de manière à former une barrière autour de l'ouverture ;
    à partir de la deuxième configuration, un sous-ensemble (30a, 30b) des deux sous-ensembles séparés (30a, 30b) est mobile individuellement dans une position sensiblement verticale de sorte qu'un côté de l'ouverture peut être accessible,
    les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) étant sensiblement parallèles entre eux lorsque la trappe d'accès (10) est dans les première et deuxième configurations et sont aptes à pivoter depuis le cadre (12) dans la troisième configuration dans laquelle les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) définissent des côtés de la barrière,
    la barrière comprenant une partie en portillon (20) sensiblement verticale pour ouvrir et fermer sélectivement la barrière afin, respectivement, de permettre et de restreindre l'accès à l'ouverture, et
    la partie en portillon (20) étant formée dans l'un des segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d).
  2. Une trappe d'accès (10 ; 110) selon la revendication 1, dans laquelle dans la deuxième configuration, le couvercle de recouvrement (14) est apte à pivoter vers une position sensiblement verticale.
  3. Une trappe d'accès (10 ; 110) selon l'une quelconque des revendications précédentes, dans laquelle les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) sont reliés au cadre (12) de manière pivotante.
  4. Une trappe d'accès (10 ; 110) selon l'une quelconque des revendications précédentes, dans laquelle, dans la configuration, les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) sont fixés à l'intérieur du cadre (12) de façon à supporter le poids d'une personne.
  5. Une trappe d'accès (10 ; 110) selon l'une quelconque des revendications précédentes, dans laquelle les ouvertures formées dans les segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) sont dimensionnées pour permettre une inspection visuelle à travers les segments de grille. (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d).
  6. Une trappe d'accès (10 ; 110) selon l'une quelconque des revendications précédentes, dans laquelle les éléments structurels des segments de grille (16a, 16b, 16c, 16d ; 116a, 116b, 116c, 116d) sont alignés lorsqu'ils sont dans la deuxième configuration.
  7. Une trappe d'accès (10 ; 110) selon l'une quelconque des revendications précédentes, comprenant en outre un rouleau (152) sur une extrémité libre du segment de grille (116a, 116b, 116c, 116d), ou de chacun de ceux-ci, pour supporter le poids de celui-ci dans la troisième configuration.
  8. Une trappe d'accès (10 ; 110) selon l'une quelconque des revendications précédentes, comprenant en outre une pluralité d'éléments d'extension (117a, 117b, 117c, 117d) s'étendant depuis les segments de grille (116a, 116b, 116c, 116d) pour augmenter la hauteur de la barrière.
  9. Une trappe d'accès (10 ; 110) selon l'une quelconque des revendications précédentes, dans laquelle le cadre (12) est formé avec un encadrement (13) configuré pour recouvrir un bord de l'ouverture.
  10. Une trappe d'accès (10 ; 110) selon la revendication 9, dans laquelle le cadre (12) et l'encadrement (13) sont formés d'un seul tenant à partir d'extrusions d'aluminium.
  11. Une trappe d'accès (10 ; 110) selon l'une quelconque des revendications précédentes, dans laquelle le cadre (12) est configuré pour former une charnière continue avec le couvercle de recouvrement (14).
EP16876994.1A 2015-12-22 2016-11-22 Trappe d'accès Active EP3394347B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2015905315A AU2015905315A0 (en) 2015-12-22 Access hatch
PCT/AU2016/051138 WO2017106905A1 (fr) 2015-12-22 2016-11-22 Trappe d'accès

Publications (4)

Publication Number Publication Date
EP3394347A1 EP3394347A1 (fr) 2018-10-31
EP3394347A4 EP3394347A4 (fr) 2019-06-12
EP3394347C0 EP3394347C0 (fr) 2023-06-14
EP3394347B1 true EP3394347B1 (fr) 2023-06-14

Family

ID=59088651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16876994.1A Active EP3394347B1 (fr) 2015-12-22 2016-11-22 Trappe d'accès

Country Status (4)

Country Link
EP (1) EP3394347B1 (fr)
AU (1) AU2016374649B2 (fr)
NZ (1) NZ744504A (fr)
WO (1) WO2017106905A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201713731D0 (en) * 2017-08-25 2017-10-11 Aqua Fabrications Ltd Lid assembly
CN109339113A (zh) * 2018-11-14 2019-02-15 微山宏瑞电力科技有限公司 一种具有围挡功能的新型安全井盖
GB201820055D0 (en) * 2018-12-10 2019-01-23 J Mac Safety Systems Ltd A hatch
US20230304250A1 (en) * 2022-03-28 2023-09-28 Ohio Gratings, Inc. Folding barrier assembly and method of use
CN115142475A (zh) * 2022-08-09 2022-10-04 中交上海航道勘察设计研究院有限公司 一种多功能井盖

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4266380A (en) * 1979-02-09 1981-05-12 Christy Concrete Products, Inc. High strength cover for underground utility box
FR2639383B1 (fr) * 1988-11-24 1992-06-05 Const Electro Meca Plain Trappe de visite pour canalisations souterraines
US5941024A (en) * 1998-03-20 1999-08-24 Journault-Jourplex Inc. Floor hatch with integrated security fence
US6640495B1 (en) * 1999-01-21 2003-11-04 Syracuse Castings Sales Corp. Safety hatch for preventing fall-through and unauthorized entry
FR2822486B1 (fr) * 2001-03-20 2004-03-05 Fernandes Ets Dispositif de protection de personnes autour d'une ouverture sur une surface de circulation du type passerelles
US6644342B1 (en) * 2001-09-10 2003-11-11 Romtec Utilities, Inc. Modular integrated wastewater lift station construction kit

Also Published As

Publication number Publication date
EP3394347A4 (fr) 2019-06-12
AU2016374649B2 (en) 2022-06-23
EP3394347C0 (fr) 2023-06-14
AU2016374649A1 (en) 2018-08-09
NZ744504A (en) 2023-01-27
EP3394347A1 (fr) 2018-10-31
WO2017106905A1 (fr) 2017-06-29

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