Roof support suitable for use in mines

Details Roof support suitable for use in mines Roof support suitable for use in mines

1984-03-27

1985-04-23

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

E21D 1544, E21D 17054

Patent

active

045126860

ABSTRACT:
A roof support, suitable for use in mines, includes a roof-engageable canopy comprising a main portion and an extension portion pivotally-connected to the main portion. Actuator means is carried by the main portion and arranged to effect sliding movement of a wedge member. This member has a wedging face which is co-operable with a complementary face formed on a part of the extension portion which projects substantially beyond the pivotal connection of the extension portion to the main portion and in the direction towards the actuator means. The sliding movement of the wedge member effects tilting of the extension portion with respect to the main portion.

REFERENCES:
patent: 3534559 (1970-10-01), Seddon et al.

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