Mining equipment

Details Mining equipment Mining equipment

1976-05-21

1978-07-25

Taylor, Dennis L.

E21D 1544

Patent

active

041021398

ABSTRACT:
A self-advancing, hydraulically powered, mine roof support comprises at least one advancing piston and cylinder unit located in or adjacent a base means of the support and attached at or towards the front of the roof support to a lifting ram operable along an axis normal to the general plane of the base means.

REFERENCES:
patent: 2910282 (1959-10-01), Barrett
patent: 3482878 (1969-12-01), Floter
patent: 3640581 (1972-02-01), Rassmann et al.
patent: 3811288 (1974-05-01), Wehner et al.
patent: 3915500 (1975-10-01), Schusener et al.
patent: 3952525 (1976-04-01), Walker et al.

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