Control system for a rock drill

Details Control system for a rock drill Control system for a rock drill

1979-05-07

1983-01-25

Mackey, Robert

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

E21C 516

Patent

active

043698484

ABSTRACT:
A hydraulic control system for use with a rock drill is adapted to sense a pressure build-up in the drill's rotation motor and in response thereto, to reverse the direction of feed of the feed motor as well as to supply hydraulic fluid to a shank cylinder on the rock drill. Supplying hydraulic fluid to the shank cylinder assists in freeing the drill from the rock.

REFERENCES:
patent: 3802514 (1974-04-01), Ein et al.
patent: 3979944 (1976-09-01), Salmi et al.
patent: 4023626 (1977-05-01), Salmi et al.
patent: 4064950 (1977-12-01), Salmi et al.
patent: 4109734 (1978-08-01), Montabert

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