Self advancing support chocks

Details Self advancing support chocks Self advancing support chocks

1974-12-02

1976-11-16

Taylor, Dennis L.

Supports

Pipe or cable

Extending through plate

248357, E21D 1544

Patent

active

039915794

ABSTRACT:
A self-advancing chock for supporting the roof of the gallery of a mine near the working face utilizing one or more lever arms articulated to the forward portion of a base (nearer the working face) and to the rear portion of a roof-supporting cap. The cap has sufficient area to cover the other elements of the chock in all positions of the lever arms and may have a slightly concave upper surface. If two lever arms are used they may be rigidly or flexibly interconnected and the cap may be in two sections for use with sloping or irregular roof areas. The base element may also be in two sections.

REFERENCES:
patent: 3779023 (1973-12-01), Koppers
patent: 3837170 (1974-09-01), Martinko et al.
patent: 3854293 (1974-12-01), Spies

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