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AssigneeCentrum Konstrukcyino-Technologiczne Maszyn Gorniczych "KOMAG"
InventorsStanislaw Romanowicz, Wojciech Skoczynski, Edward Janik
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The roof support according to the invention is between the roof-bar (2) and the sill piece (1) with at least one system of levers (3,4) connected by articulation with each other and connected by articulation with the roof-bar (2) and the sill piece (1) so that they have the form of a lying letter V directed with its vertex towards the fall. Between the levers (3,4) it is provided with the hydraulic cylinder (5) spragging the levers (3,4) and thus the lining. That admits to achieve a high multiplication of the cylinder travel in relation to the change of the lining height, and a multiplication of forces. In shield roof supports of a lemniscate type the lever system can consist of the fall shield (6) and the outside arm (7) of the lemniscate arrangement.
A mine lining structure comprising a sill piece, a roof bar and a plurality of spragging levers interconnecting said sill piece and said roof bar characterized in having one lever pivotally connected at one of its ends to said sill piece, in having a second lever pivotally connected at one of its ends to said roof bar, said one and said second levers being pivotally connected together at ends opposite said sill piece and roof bar to form a pair of connected levers in the form of a horizontally extending V with the apex of the V adopted to extend towards a mine fall;
Dependencies are inferred from the claim text.