Rotating device for drill mast

Details Rotating device for drill mast Rotating device for drill mast

1982-04-22

1984-05-01

Machado, R. P.

Supports

Machinery support

Movable machine

248371, F16M 1110

Patent

active

044456638

ABSTRACT:
A rotating device for a drill mast of a roof bolting mining machine has a pair of hydraulic cylinders respectively connected to appropriate ends of a lever arm. The hydraulic cylinders are connected at their respective other ends to the mast and to the mining machine. Full contraction of one cylinder rotates the lever arm which rotates the mast up to 45 degrees. Additional contraction of the other cylinder rotates the mast an additional 45 degrees.

REFERENCES:
patent: 3711047 (1973-01-01), O'Leary
patent: 3982715 (1976-09-01), Lindgren
patent: 4000873 (1977-01-01), Wallace
patent: 4232850 (1980-11-01), Kimber
patent: 4265147 (1981-05-01), Fox
patent: 4290239 (1981-09-01), Zimmer
patent: 4364540 (1982-12-01), Montabert

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