Drill steel holder

Details Drill steel holder Drill steel holder

1976-09-22

1978-02-28

Blix, Trygve M.

Cutlery

81 572, 173164, 175220, F16C 3100

Patent

active

040763374

ABSTRACT:
A drill steel holder is mounted on the drill box of a mine roof drilling and bolting machine. An opposed pair of levers are supported intermediate outboard and inboard ends thereof by vertical pivots. A hydraulic ram connected between the outboard ends of the lever swings their inboard ends thereof towards and away from one another. Rollers on chassis pivoted onto the inboard ends embrace a drill steel mounted in a chuck in the drill box, and stops are provided for limiting the pivotal movement of one of the levers.

REFERENCES:
patent: 2781185 (1957-02-01), Robbins
patent: 3749454 (1973-07-01), Bailey et al.
patent: 3892148 (1975-07-01), Wiley
patent: 3906820 (1975-09-01), Hauk

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