Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1996-05-20
1998-04-28
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
4053021, 411400, E02D 2100, F16B 3100
Patent
active
057436789
ABSTRACT:
An anchor eye-bolt for use in strengthening a mine roof as well as for supporting mine installation below the roof. The anchor eye-bolt of the present invention comprises broadly an elongated stem having on a first end thereof a threaded portion for engaging into an expansion-type anchor shell, and a polygonal bolt head forming a second end thereof. The polygonal bolt head comprises a circular pressure bearing surface on a first side thereof adjoining the stem, and an eyed projection extending from a top surface thereof. The circular pressure bearing surface preferably has a diameter as large as an across-corner dimension of the polygonal bolt head. The eyed projection preferably has a width similar to an across-flat dimension of the polygonal bolt head. A thickness of the eyed projection is preferably substantially a same dimension as a diameter of the stem. In another aspect of the anchor eye-bolt of the present invention, there is provided a tension washer used in combination with that anchor eye-bolt. The tension washer mounts on the anchor eye-bolt against the pressure bearing surface of the polygonal bolt head. The tension washer has a bent portion and a hole through that bent portion for receiving an attachment of a cord member used in strengthening a mine roof.
REFERENCES:
patent: 1526358 (1925-02-01), Mechling
patent: 3163012 (1964-12-01), Dempsey
patent: 4601616 (1986-07-01), Barish et al.
patent: 4934873 (1990-06-01), Calandra
patent: 4946315 (1990-08-01), Chugh et al.
patent: 4958796 (1990-09-01), Bernosky
patent: 5087160 (1992-02-01), Pezzutto
patent: 5183360 (1993-02-01), Freeman
Bathurst Machine Shop Ltd.
Taylor Dennis L.
Theriault Mario D.
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