Mine roof supports

Details Mine roof supports Mine roof supports

1975-08-28

1976-11-16

Taylor, Dennis L.

Supports

Pipe or cable

Extending through plate

248357, E21D 1544

Patent

active

039915808

ABSTRACT:
A self-advancing mine roof support of which the ground-engaging structure comprises a pair of spaced apart skids in the spacing between which the relay bar structure of the advancing mechanism is housed, such structure being powered by a pair of pressure-fluid operated rams disposed one adjacent each of said two skids.

REFERENCES:
patent: 3192721 (1965-07-01), Gaskell
patent: 3355898 (1967-12-01), Barrett et al.
patent: 3418814 (1968-12-01), Groetschel
patent: 3525227 (1970-08-01), Hancock et al.
patent: 3851480 (1974-12-01), Beulker et al.

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