Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1991-08-30
1993-03-09
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
4052593, 4053021, E21D 2100
Patent
active
051921464
ABSTRACT:
An open seam friction rock stabilizer having a compressible body with portions alternately in contact with and not in contact with borehole wall, the contacting portions being separated by an angle between 70 degrees and 150 degrees.
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patent: 4322183 (1982-03-01), Ciavatta
patent: 4472087 (1984-09-01), Elders
patent: 4634317 (1987-01-01), Skogberg et al.
patent: 4666345 (1987-05-01), Seegmiller
patent: 4826358 (1989-04-01), Brustrom
Corbin David H.
Selko John J.
Simmons-Rand Company
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