Manhole cover, manhole using same and lock ring therefor

Details Manhole cover, manhole using same and lock ring therefor Manhole cover, manhole using same and lock ring therefor

E - Fixed Constructions

02

D

E02D 29/14 (2006.01) F16B 21/18 (2006.01)

Patent

CA 2052111

ABREGE DU CONTENU TECHNIQUE DE L'INVENTION Le tampon (1) de ce regard de chaussée porte un anneau déformable (3) sur lequel font saillie deux loquets (11) diamétralement opposés. Il comporte également, à 90° des loquets, une lumière qui débouche à l'aplomb de l'anneau et, à l'opposé de celle-ci, une butée (13) de retenue radiale de l'anneau. En introduisant une barre dans la lumière du tampon, on provoque en un seul geste d'abord l'ovali- sation de l'anneau et, par suite, le retrait des deux loquets, puis le soulèvement du tampon. Fig. 3

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