Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1978-12-20
1980-12-02
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
405295, E21D 1544
Patent
active
042368502
ABSTRACT:
A shield timbering frame for timbering mines adjacent a mining face, comprises a horizontal floor-engaging skid and a breaking shield extending obliquely over the skid which is connected to the skid by a pair of longitudinally spaced, lemniscate guide rods. A roof cap member has an inner end which is pivoted to the upper end of the breaking shield and it is also braced by a piston and cylinder combination which is articulated to the breaking shield intermediate the length thereof and to the roof cap intermediate its length. At least one hydraulic ram is mounted on the skid and is engaged with the roof cap between the connection of the roof cap to the breaking shield and the connection to the additional support. The hydraulic ram is madeup of at least three telescopically interengageable extensible and retractable parts and includes pressure valve means to provide a substantially equal support pressure on the roof cap in various positional orientations of the roof cap.
REFERENCES:
patent: 3127748 (1964-04-01), Cooke
patent: 3902325 (1975-09-01), Sigott et al.
patent: 4048804 (1977-09-01), Elsner et al.
patent: 4121426 (1978-10-01), Heyer
Koppers Manfred
Pawelski Ludwig
Taylor Dennis L.
Thyssen Industrie AG
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