Yield tube bolt assembly

Details Yield tube bolt assembly Yield tube bolt assembly

1987-01-15

1990-09-04

Cuomo, Peter M.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

405262, 411 10, 411 8, E21D 2100

Patent

active

049540181

ABSTRACT:
This invention relates to a rib bolt assembly including a collapsible yield device located between an exposed end of the rib bolt and a side of a mine pillar in which the collapsible yield device will withstand a predetermined torque but will collapse at a stress less than the failure strength of the rib bolt.

REFERENCES:
patent: 2725843 (1955-12-01), Koski
patent: 2738754 (1956-03-01), Bierer
patent: 3174386 (1965-03-01), Lewis
patent: 3179082 (1965-04-01), McClean
patent: 3967455 (1976-07-01), Conway
patent: 4112693 (1978-09-01), Collin et al.
patent: 4149446 (1974-04-01), Spengler et al.
patent: 4322193 (1982-03-01), Stahl
patent: 4334803 (1982-06-01), Westlake et al.
patent: 4410296 (1983-10-01), Unrug

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