Shield structure

Details Shield structure Shield structure

1976-08-17

1977-05-03

Taylor, Dennis L.

Supports

Pipe or cable

Extending through plate

248357, E21D 1544

Patent

active

040206408

ABSTRACT:
The invention relates to a shield structure particularly adapted for longwall mining providing a protected area that effectively insures operator safety even if total collapse of the mine roof should occur. The prop supporting the load-bearing cap of the shield is inclined rearwardly with respect to the mine face, and a pair of tension links that are pivotally connected to each other and are acted upon by a hydraulic cylinder in a direction transverse to the tension links, provide a structure which will ensure a widened (though shorter) protected area in which an operator may reside even upon complete roof collapse. The widening of the area helps insure that any fallen material from the roof will not harm an operator in the protected area.

REFERENCES:
patent: 3885396 (1975-05-01), Snowden et al.
patent: 3898845 (1975-08-01), Plevak et al.
patent: 3902325 (1975-09-01), Sigott et al.
patent: 3915500 (1975-10-01), Schlusener et al.
patent: 3959976 (1976-01-01), Blumenthal

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