Hinge for internal manholes covers. (Machine-translation by Google Translate, not legally binding)

摘要

Preferential internal hinge for a lid formed by at least one sheet (1) having an angle frame (2) filled with cement that is housed on an upper frame (3) of, for example, a box ( 4) establishing the closure of the latter, characterized in that it comprises two opposing housings (5) made in the upper frame (3) and two bolts (6) projecting laterally to the sheet (1) that move inside said housings (4). 5) during the folding down of the sheet (1), said housings (5) having an upper entrance opening (7) from which an internal widening (8) and an external widening (8 ") extend laterally, in the that the pin (6) is located between the closing and stable opening positions of the leaf (1) respectively. (Machine-translation by Google Translate, not legally binding)