Rock anchor bolt

Details Rock anchor bolt Rock anchor bolt

1994-08-29

1997-11-18

Tsay, Frank

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

4052591, F21D 2100

Patent

active

056880774

ABSTRACT:
A rock anchor bolt (18) comprising an elongated rod (10, 12, 14, 16, 18) which is provided over its outer surface with at least one (11), two (13), three, (17) or four (15) axially extending grooves. The rod (10, 12, 14, 16, 18), is preferably twisted over its length and provided over one of its ends (22) with screw threads (23) in order to receive a cooperating nut (25).

REFERENCES:
patent: 4247223 (1981-01-01), Amakasv
patent: 4284379 (1981-08-01), Chaiko
patent: 4307979 (1981-12-01), Killmeyer
patent: 4325657 (1982-04-01), Elders
patent: 4350462 (1982-09-01), Elders
patent: 4511289 (1985-04-01), Herron
patent: 5054146 (1991-10-01), Wiesenfeld et al.
patent: 5192169 (1993-03-01), Landsberg
patent: 5297700 (1994-03-01), Witzand

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