Mine roof expansion anchor and bail member therefor

Details Mine roof expansion anchor and bail member therefor Mine roof expansion anchor and bail member therefor

1992-07-14

1994-01-04

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

4052594, 4052591, E21D 2000

Patent

active

052755126

ABSTRACT:
A bail member having a medial portion of substantially conical shape for retaining shell and tapered plug portions of a mechanical expansion anchor in mutually assembled relation prior to installation. The medial portion is positioned over the large end of the plug and tapers inwardly in a direction away from the plug to provide a lead-in for insertion of the anchor, carried on the end of a mine roof bolt, into the open end of a blind drill hole. The bolt and medial portion may include an axial bore and a plurality of openings, respectively, for passage of a hardenable grout pumped through the bore to provide an anchoring system of enhance strength and durability.

REFERENCES:
patent: 4453845 (1984-06-01), Donan, Jr.
patent: 4626139 (1986-12-01), Blackwell
patent: 4744699 (1988-05-01), Price et al.
patent: 4859118 (1989-08-01), Schaeffer
patent: 5018908 (1991-05-01), Laphon
patent: 5082399 (1992-01-01), Frease et al.
patent: 5087160 (1992-02-01), Pezzutto

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