Shielding apparatus

Details Shielding apparatus Shielding apparatus

E - Fixed Constructions

21

D

E21D 9/06 (2006.01) E21B 7/20 (2006.01) E21B 11/00 (2006.01)

Patent

CA 2097154

A shielding apparatus comprises a cylindrical shield body, a crankshaft supported by the shield body rotatably around the axis of the shield body, a plurality of rotors successively provided in the direction of the axis in a front region ahead of the shield body and a driving mechanism for rotating the crankshaft around the axis, wherein the rotors define the outer surface of an approximately conical or truncated conical shape in conjunction with each other, and the adjoining rotors are made eccentric with respect to the axis of the shield body in the different directions from each other.

n bouclier protecteur comprend un carter de protection cylindrique, un vilebrequin soutenu par le carter de façon rotative autour de l'axe de ce dernier, plusieurs rotors se succédant dans le sens de l'axe à l'avant du carter et un mécanisme d'entraînement pour faire tourner le vilebrequin autour de l'axe. Les rotors, en conjugaison les uns avec les autres, définissent la surface extérieure d'une forme presque conique ou tronconique. Ces rotors adjacents sont excentriques par rapport à l'axe du carter et sont opposés les uns aux autres.

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