Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1999-01-13
2000-11-14
Lillis, Eileen D.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
405288, 411545, 411531, E21D 2100, F16B 4300
Patent
active
061460567
ABSTRACT:
A double ribbed bearing plate for use with a channel member in supporting a mine roof. The bearing plate includes a base with ribs in the bearing plate define recesses which receive flanges on the channel. The longitudinal edges of the bearing plate may extend below the plane of the base. When installed on a mine roof, the longitudinal edges may be spread apart upon changes in the load applied by the mine roof.
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"Jennmar's #5 mine Steel Roof Channels", Frank Calandra Inc. (1 p.) (undated).
"W Straps", Arnalls Engineering Pty. Limited (1 p.) (undated).
Jennmar Corporation
Lagman Frederick L.
Lillis Eileen D.
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