Walking street for mine shaft

E - Fixed Constructions – 21 – D

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E21D 23/08 (2006.01)

Patent

CA 1225837

ABREGE DESCRIPTIF D'UN BREVET D'INVENTION . " PILE DE SOUTENEMENT MARCHANT , NOTAMMENT POUR LES MINES SOUTERRAINES " L'invention concerne une pile pour le sou- tènement marchant dans les mines souterraines . Entre la flèche et l'arrière du cha- peau , on intercale une bielle soumise à l'action d'un vérin de positionnement . Pendant le soutènement, ce vérin assure le verrouillage hydraulique , avec l'intervention d'une valve de coulissement en cas de sur- pression . Applications : accompagnement du soutène- ment pendant les mouvements des épontes ( même dans le sens longitudinal ) , sans détériorer la carrosserie de la pile .

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