Mine roof supports

Details Mine roof supports Mine roof supports

1976-02-13

1977-12-13

Taylor, Dennis L.

E21D 1544

Patent

active

040621944

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.

REFERENCES:
patent: 3408820 (1968-11-01), Bower
patent: 3425229 (1969-02-01), Groetschel
patent: 3570255 (1971-03-01), Shuttleworth

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