Double rod cylinder feed system

Details Double rod cylinder feed system Double rod cylinder feed system

1993-08-16

1994-09-06

Rada, Rinaldi I.

Tool driving or impacting

Advance causing or controlling means

Driven flexible member causes advance

173141, E21C 506

Patent

active

053439627

ABSTRACT:
A hydraulic system for moving a drilling head in a rectilinear motion between a mast crown and a mast table on a drilling machine includes a double rod hydraulic cylinder connected at a bottom end to a mast table and at a top end to a traveling sheave block; first and second flexible connector members for connecting a drilling head to the mast through the sheave block; and hydraulic feed circuitry for actuating the cylinder to move the sheave block and drilling head alternately in a first pulldown direction and in a second pullback direction.

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