MANHOLE HATCH Russian patent published in 2006 - IPC E02D29/12

Abstract RU 2286425 C2

FIELD: building, particularly manhole shafts, other inspection or access chambers and accessories.

SUBSTANCE: hatch comprises body closed with detachable lid and shaped as vertical contoured wall with horizontal support flange. The flange is provided with stiffening ribs and with orifices formed between the stiffening ribs. Vertical contoured wall has smooth outer surface. Horizontal support flange and stiffening ribs face body interior.

EFFECT: reduced labor inputs for manhole repair.

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RU 2 286 425 C2

Authors

Zverzhkhovskij Grigorij Stanislavovich

Dates

2006-10-27—Published

2004-11-18—Filed