Roof support

Details Roof support Roof support

1977-12-06

1978-09-19

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

E21D 1544

Patent

active

041143850

ABSTRACT:
A roof support for use in mines is moved by its own drive mechanism while under permanent load. The support comprises two side-by-side lower carriages with articulated tracks, cross members joining those carriages and an arm articulated to the cross members so as to swing up and down under the action of a jack connected between the arm and the cross members. At least one upper carriage having an articulated track is carried on the upper end of the arm, and is pushed against the roof of a mine gallery by the jack.

REFERENCES:
patent: 2826898 (1958-03-01), Joy
patent: 2899800 (1959-08-01), Joy

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