Device for reciprocating motion of a rotating drilling body...

Details Device for reciprocating motion of a rotating drilling body... Device for reciprocating motion of a rotating drilling body...

E - Fixed Constructions

21

B

255/32

E21B 6/00 (2006.01) E21B 4/10 (2006.01) E21B 19/084 (2006.01) E21B 19/086 (2006.01)

Patent

CA 1179671

ABSTRACT OF THE DISCLOSURE A device for reciprocating motion of a rotating drilling body of a drilling machine in the longitudinal diroction of a hole drilled in rock or ground includes two cylinder-piston devices which via chains are connected to a carriage carrying the drilling body and which comprise parallel piston rods, the ends of which are supported by a frame on the machine, and cylinders movable along the piston rods and connected to each other and via the chains also to the carriage. The increase the feeding velocity of the carriage or the increase the force of the carriage one of the cylinders or both cylinders, respectively, are selectively fluid pressurized. (Figure 1 of the drawings is a suitable illustration).

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