Mine roof anchor assembly

Details Mine roof anchor assembly Mine roof anchor assembly

1981-11-02

1984-03-20

Husar, Cornelius J.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

405261, 411 47, E21D 2100, E21D 2002

Patent

active

044377959

ABSTRACT:
A mine roof anchor assembly comprising an elongated bolt, one end of which is threadedly engaged with an expansion anchor. The expansion anchor includes a cone nut threaded on the bolt which moves axially through a shell for expanding the latter into gripping engagement with the mine roof. A bail member of inverted L-shape is connected to, and extends upwardly from, the expansion shell, a portion of the bail member overlying the cone nut to limit the relative longitudinal movement of the bolt when it is rotated in the cone nut. That portion of the bail member overlying the bolt is deflected by the latter to urge teeth mounted on the bail member portion into impinging engagement with the mine roof.

REFERENCES:
patent: 2952129 (1960-09-01), Dempsey
patent: 3940941 (1976-03-01), Libert et al.
patent: 4100748 (1978-07-01), Hansen
patent: 4293244 (1981-10-01), Donan, Jr.
patent: 4299515 (1981-11-01), Yates et al.

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