Roof truss sling

Details Roof truss sling Roof truss sling

1986-08-26

1988-08-30

Reese, Randolph A.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405259, 299 11, E21D 2100

Patent

active

047672420

ABSTRACT:
A roof truss sling having an open ended sleeve which has a wire strand passed through it and attached to bolts fixed in the mine roof. The sleeve is distorted so as to simultaneously crimp the sleeve to the wire strand and also shorten its length. The shortening of the length of the sleeve applies a tensile force between the roof bolts through the wire strand. This tensile force serves to compress the mine roof material and thus acts to truss the mine roof.

REFERENCES:
patent: Re14482 (1918-06-01), Rothermel
patent: 1345806 (1920-07-01), Ornston
patent: 1726896 (1929-09-01), Mraz
patent: 3163012 (1964-12-01), Dempsey
patent: 4265571 (1981-05-01), Scott
patent: 4456405 (1984-06-01), Galis
patent: 4466535 (1984-08-01), Huson
patent: 4566378 (1986-01-01), Fleissner
patent: 4596496 (1986-06-01), Tyrell et al.
patent: 4632605 (1986-12-01), Tucker

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