Feed beam

Details Feed beam Feed beam

E - Fixed Constructions

21

B

255/34

E21B 19/24 (2006.01) E21B 19/084 (2006.01)

Patent

CA 1077017

ABSTRACT OF THE DISCLOSURE A feed beam for a rock drill comprises a box girder (13), a saddle (10) slidable along the box girder, and two power units (20,20a) inserted into the ends of the box girder. Each power unit comprises a pair of fixed pulleys (22,24) located outside the end of the box girder, an hydraulic jack (26) carrying a pair of movable pulleys (28,30) within the box girder, and a cable coupled between the power unit and the saddle and passing over the four pulleys.

302597

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