Flush-mounted retractable lid

E - Fixed Constructions – 02 – D

Patent

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Details

E02D 29/14 (2006.01)

Patent

CA 2452823

A flush-mounted lid for an in-ground enclosure such as an irrigation service vault utilizes co-operating rollers arid rails to retract the lid to an opened position. A hydraulic shock aids in lifting tree lid to facilitate rolling the lid to the opened position. A safety knob connected via a cable to a latch cam permits a user to engage the cam with a stop which arrests movement of the lid and retains the lid in the open position until such time as the safety knob is released. A latching mechanism prevents opening of the lid until released.

Un couvercle encastré pour enceinte enterrée, comme une chambre de service d'irrigation, fait appel à des rails de coopération auxiliaires à galets pour faire manoeuvrer le couvercle en position ouverte. Un amortisseur hydraulique aide au soulèvement du couvercle pour faciliter son pivotement en position ouverte. Un bouton de sûreté raccordé au moyen d'un câble à une came à verrou permet à l'utilisateur d'engager la came dans une butée qui interrompt le mouvement du couvercle et qui le retient en position ouverte, jusqu'à ce que le bouton de sûreté soit libéré. Un mécanisme de verrouillage empêche l'ouverture du couvercle jusqu'à la libération dudit mécanisme.

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