초록 ▼

This road manhole comprises a frame (4) which delimits an opening (6) and which is provided with an internal collar (8) which extends radially inwards, a cover (10) which comprises a blocking web (12) and a cylindrical skirt (14) which complements the internal collar (8), the blocking web and the sk

This road manhole comprises a frame (4) which delimits an opening (6) and which is provided with an internal collar (8) which extends radially inwards, a cover (10) which comprises a blocking web (12) and a cylindrical skirt (14) which complements the internal collar (8), the blocking web and the skirt defining a concave corner (16), and a main gasket (18) which is arranged on the internal collar (8) and which is interposed in the closed state between the cover (10) and the frame (4). The road manhole (2) comprises an auxiliary gasket (20) which is in contact, at least in the closed state, with the concave corner (16).

대표청구항 ▼

The invention claimed is: 1. Road manhole, of the type defining a centre axis (X-X) and comprising: a frame (4) which delimits an opening (6) and which is provided with an internal collar (8) which extends radially inwards, a cover (10) which comprises a blocking web (12) which is intended to block

The invention claimed is: 1. Road manhole, of the type defining a centre axis (X-X) and comprising: a frame (4) which delimits an opening (6) and which is provided with an internal collar (8) which extends radially inwards, a cover (10) which comprises a blocking web (12) which is intended to block the opening (6) and a cylindrical skirt (14) which is centred on the centre axis (X-X) and which substantially complements the internal collar (8), the blocking web (12) and the skirt defining a concave corner (16) which is directed radially outwards relative to the centre axis (X-X), and a main gasket (18) which is arranged on the internal collar (8) and which is interposed between the cover (10) and the frame (4) when the cover is in a closed position, the road manhole (2) comprising an auxiliary gasket (20) which is, at least in the closed state of the manhole, arranged on the skirt (14) and which is in contact with the concave corner (16), characterised in that the main gasket (18) and the auxiliary gasket (20) are formed by two separate components. 2. Manhole according to claim 1, characterised in that the main gasket (18) and the auxiliary gasket (20) are produced from resilient material, preferably from the same resilient material. 3. Manhole according to claim 1, wherein said main gasket (18) and said auxiliary gasket (20) are independent from each other. 4. Manhole according to claim 1, characterised in that the auxiliary gasket (20) is placed against the main gasket (18) during closure of the cover (10) on the frame. 5. Manhole according to claim 1, characterised in that the auxiliary gasket (20) comprises a first portion (22) which forms a sealing lip. 6. Manhole according to claim 5, characterised in that the first portion (22) is in the form of a torus. 7. Manhole according to claim 5, characterised in that the first portion has a hollow cross-section, in particular in the form of a ring. 8. Manhole according to claim 5, characterised in that the auxiliary gasket comprises a second portion (24) which is fixedly joined to the first portion (22) and which has a non-circular cross-section. 9. Manhole according to claim 8, characterised in that the second portion (24) extends the first portion (22) axially inwards and, over the entire axial length thereof, presses on the skirt (14). 10. Manhole according to claim 8, characterised in that the second portion (24) of the auxiliary gasket is suitable for preventing sliding and torsion of the auxiliary gasket on the skirt. 11. Manhole according to claim 5, characterised in that the auxiliary gasket (20) is against the main gasket (18) during closure of the cover (10) on the frame. 12. Manhole according to claim 11, characterised in that the first portion (22) is in the form of a torus. 13. Manhole according to claim 11, characterised in that the first portion has a hollow cross-section, in particular in the form of a ring. 14. Manhole according to claim 11, characterised in that the auxiliary gasket comprises a second portion (24) which is fixedly joined to the first portion (22) and which has a non-circular cross-section. 15. Manhole according to claim 14, characterised in that the second portion (24) extends the first portion (22) axially inwards and, over the entire axial length thereof, presses on the skirt (14). 16. Manhole according to claim 14, characterised in that the second portion (24) of the auxiliary gasket is suitable for preventing sliding and torsion of the auxiliary gasket on the skirt. 17. Manhole according to claim 11, characterised in that the main gasket (18) and the auxiliary gasket (20) are produced from resilient material, preferably from the same resilient material.