Excavation-roof support

Details Excavation-roof support Excavation-roof support

1975-01-23

1976-06-01

Taylor, Dennis L.

Supports

Pipe or cable

Extending through plate

248357, E21D 1544

Patent

active

039599760

ABSTRACT:
A base has one side facing towards and another side facing away from the face of the excavation. A shield has a first end portion and a second end portion, the latter being adjacent the other side and the shield extending upwardly and towards the one side. A roof-support cap is mounted on the first end portion. A mounting arrangement includes a shaft and mounts the second end portion of the shield on the base for pivoting about a pivot axis. A displacing arrangement serves to selectively displace the pivot axis in direction towards and away from the one side of the base, so as to maintain the cap in engagement with the roof despite different heights of the latter.

REFERENCES:
patent: 3779023 (1973-12-01), Koppers
patent: 3854293 (1974-12-01), Spies
patent: 3874178 (1975-04-01), Kunzer

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