Mine roof bolt

Details Mine roof bolt Mine roof bolt

1979-11-23

1982-06-15

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

411396, E21D 2000

Patent

active

043348033

ABSTRACT:
A mine roof bolt of the type used in supporting the ceiling or roofs of underground mine passages is disclosed. The mine bolt includes an elongated shaft, threaded on one end with a stop member in the form of a hemispherical head provided at the other end. A bolt head is force fitted onto the shaft into abutment with the outer stop member. Similarly, a washer is also force fitted onto the shaft and into abutment with the bolt head. An inner stop in the form of an annular bead is formed on the shaft adjacent the underside of the washer.

REFERENCES:
patent: 1067755 (1913-07-01), Price
patent: 1346058 (1920-07-01), Robergel
patent: 1414979 (1922-05-01), Carter
patent: 2237236 (1941-04-01), Matthews
patent: 2549332 (1951-04-01), Parker
patent: 3060538 (1962-10-01), Simi
patent: 3181902 (1965-05-01), Aitken
patent: 3298270 (1967-01-01), Launay
patent: 3315720 (1967-04-01), Gutshall
patent: 3854372 (1974-12-01), Gutshall
patent: 3921495 (1975-11-01), Braun et al.
patent: 3978758 (1976-09-01), Bright

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