Shield assemblies for installation in under-ground roadways and rock excavating machines including such shield assemblies
AssigneeCoal Industry (Patents) Limited
InventorTerence R. Howard
Life of this patent
Estimating the term…
Abstract
A shield assembly for installation in an underground roadway or tunnel comprises an articulated upper shield assembly, a lower shield assembly and a plurality of hydraulic rams for urging the upper shield assembly upwards relatively to the lower shield assembly, a telescopic arrangement being provided which guides the upper shield assembly in a direction along the roadway or tunnel but which allows the end margins of the upper shield assembly to move outwardly relative to the end margins of the lower shield assembly.
Claims11
A shield assembly for installation in an underground roadway or tunnel, comprising an articulated upper shield assembly, a lower shield assembly, a plurality of hydraulic rams for urging the upper shield assembly upwards relatively to the lower shield assembly and a generally vertically extending telescopic guiding means extending between the lower and upper assemblies which during vertical movement of the upper shield assembly guides the upper shield assembly in a direction along the roadway or tunnel and which allows the lowermost end margins of the upper shield assembly to move outwardly relative to the adjacent end margins of the lower shield assembly whereby said shield is anchored in the roadway or tunnel.
An excavating machine for cutting rock from a working face to extend an underground roadway or tunnel, having a shield assembly for installation in the underground roadway or tunnel comprising an articulated upper shield assembly, a lower shield assembly, a plurality of hydraulic rams for urging the upper shield assembly upwards relatively to the lower shield assembly and a telescopic means for guiding during vertical movement of the upper shield assembly the upper shield assembly in a direction along the roadway or tunnel and which allows the end margins of the upper shield assembly to move outwardly relative to the end margin of the lower shield assembly whereby said shield is anchored to the tunnel or roadway.
Dependencies are inferred from the claim text.