Drill boom arrangement

Details Drill boom arrangement Drill boom arrangement

1979-04-10

1980-11-11

Foss, J. Franklin

Supports

Machinery support

Movable machine

173 43, F16M 100

Patent

active

042328489

ABSTRACT:
In a drill boom arrangement, a feed beam for a rock drill is turnable by means of a hydraulic turning device (34) about an axis (45) that is normally parallel with the axis of drilling during drifting. When not actuated, the turning device (34) is at least partially relieved of torque by means of a friction coupling (52) which is coupled in parallel with the turning device and is normally engaged. The coupling is automatically released when the turning device is actuated. A slip-coupling (67) is coupled in parallel with the first coupling (52) and in series with the turning device in order to avoid overloading of the turning device which is hydraulically self-braking.

REFERENCES:
patent: 3020012 (1962-02-01), Moracco et al.
patent: 3226064 (1965-12-01), Thompson
patent: 3523336 (1970-08-01), Kimber
patent: 3664436 (1972-05-01), Beagan
patent: 3711047 (1973-01-01), O'Leary
patent: 3782484 (1974-01-01), Martin
patent: 3923276 (1975-12-01), Kimber
patent: 3973747 (1976-08-01), Jagerstrom
patent: 3982715 (1976-09-01), Lindgren
patent: 4022410 (1977-05-01), Ewart

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