Expansion bolt and mine roof reinforcement

Details Expansion bolt and mine roof reinforcement Expansion bolt and mine roof reinforcement

1986-09-10

1990-09-04

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

405288, 411 19, E21D 2100

Patent

active

049540173

ABSTRACT:
An expansion bolt, adapted to be anchored in a hole, having a hollow shank portion adapted to hold a pressurizing fluid and to expand girthwise on pressurization of the fluid, and further having a threaded portion adapted on insertion of the shank portion in the hole to extend out of the hole and to have a nut threaded thereon, whereby, following insertion of the shank portion of the bolt, in an unexpanded condition, in the hole, the shank portion may be expanded by pressurization of fluid therein for anchoring it in the hole and the nut threaded up on the threaded portion of the bolt.

REFERENCES:
patent: 1802270 (1931-04-01), Rawlings
patent: 2667037 (1954-01-01), Thomas et al.
patent: 3568450 (1971-03-01), Whiting
patent: 3665719 (1972-05-01), Whiting
patent: 3837258 (1974-09-01), Williams
patent: 3922867 (1975-12-01), Scott
patent: 3940941 (1976-03-01), Libert et al.
patent: 4012913 (1977-03-01), Scott
patent: 4459067 (1984-07-01), Skogberg et al.

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