Importance

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Abstract

An extraction device to remove pathway conduits, which are embedded in hardened concrete slabs is arranged by a quadrangular main piece having lateral faces forming a curvature correlative to the diameter of the pathway conduit, and being cylindrical and freely rotatable inside the conduit. Towards the upper part of the quadrangular main piece, some sets of posts are deployed, showing a space between each set of posts, where the space between each set of posts, is occupied by a set of flat bars, placed in the center, held by a bolt, so that they can have movement, and turn to the sides, and have towards the upper end, a pointed spike. Towards the central part of the rectangular piece, there is an orifice through which a square coupling is placed, and which has a revision orifice and further down an inner thread as a fastener with a second square profile.

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First Claim