Mine roof supports
AssigneeGullick Dobson Limited
InventorArchelaius Dawson Allen
Life of this patent
Estimating the term…
Abstract
A roof-engaging assembly for a mine roof support having prop or jack means to engage and support the roof-engaging assembly, comprises a rigid part to engage said prop or jack means, and a roof-engaging part positioned over and resiliently urged away from the rigid part. Preferably the rigid part has a roof-engaging face and a relatively stepped or recessed face below the roof-engaging face, the roof-engaging part being positioned over and resiliently urged away from the stepped or recessed face and towards positions above the roof-engaging face of the rigid part.
Claims7
A roof-engaging assembly for a mine roof support having prop or jack means to engage and support the roof-engaging assembly, comprising a rigid part to engage said prop or jack means, the rigid part having a roof-engaging face and a relatively stepped or recessed face below the roof-engaging face, a roof-engaging part positioned over said stepped or recessed face and resiliently urged away therefrom towards positions above the roof-engaging face of the rigid part which, at least where it underlies the resiliently urged roof-engaging part, is of open-work or lattice-like construction to allow passage through of foreign matter.
Dependencies are inferred from the claim text.