Mine roof support

Details Mine roof support Mine roof support

1975-12-18

1977-07-26

Taylor, Dennis L.

Supports

Pipe or cable

Extending through plate

248357, E21D 1544

Patent

active

040374190

ABSTRACT:
This invention relates to a mine roof support comprising a floor engaging member, a roof engaging member, hydraulic or other variable length struts supporting the roof engaging member, a shield pivotally connected at its upper end to the roof engaging member and a pair of links secured between a pair of pivotal connections on the lower portion of the shield and a pair of pivotal connections on the floor engaging member, so arranged as to ensure that the upper end of the shield will move in a substantially straight path perpendicular to the length of the floor engaging member. The invention provides that both shield and the top link are made of substantial width to guard against entry of debris from the goaf behind the support into the working space formed between the floor engaging member and the roof engaging member.

REFERENCES:
patent: 3830070 (1974-08-01), Rosenberg et al.
patent: 3885396 (1975-05-01), Snowden et al.
patent: 3902325 (1975-09-01), Sigott et al.
patent: 3915500 (1975-10-01), Schlusener et al.
patent: 3928981 (1975-12-01), Parker et al.

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