Roof support suitable for use in mines

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

1981-11-17

1984-02-07

Purser, Ernest R.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

299 33, E21D 2300

Patent

active

044300263

ABSTRACT:
A roof support suitable for use in mines includes roof-engageable means provided with a roof-engageable pad which is so mounted with respect to the remainder of the roof-engageable means as to be movable with respect thereto for exerting a thrust on the mine roof. A linkage is pivotally connected between the pad and the remainder of the roof-engageable means. Actuator means is so pivotally connected to and supported by the linkage that when operated it effects movement of the pad with respect to the remainder of the roof-engageable means, being itself constrained, simultaneously upon such movement, to move bodily with the pad.

REFERENCES:
patent: 3779023 (1973-12-01), Koppers
patent: 3928981 (1975-12-01), Parker et al.
patent: 4020640 (1977-05-01), Sigott et al.
patent: 4114387 (1978-09-01), Rutherford
patent: 4124984 (1978-11-01), Saunders

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