Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Reexamination Certificate
2005-07-26
2005-07-26
Lagman, Frederick L. (Department: 3673)
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
C405S302100
Reexamination Certificate
active
06921232
ABSTRACT:
A truss has a pair of parallel and longitudinally extending chord rods and transverse rods interconnecting the chord rods. First and second slides each have a pair of tubes each fitting over a respective one of the chord rods and slidable longitudinally therealong and a cross member rigidly interconnecting the tubes and formed with a throughgoing hole through which passes a respective anchor member projecting from a tunnel or mine wall. The slides can be longitudinally fixed on the rods.
REFERENCES:
patent: 4699547 (1987-10-01), Seegmiller
patent: 4776729 (1988-10-01), Seegmiller
patent: 4960348 (1990-10-01), Seegmiller
patent: 5018907 (1991-05-01), Chugh et al.
patent: 5193940 (1993-03-01), Long
patent: 5755535 (1998-05-01), Fox
Domanski Lothar
Podjadtke Rudi
Wunderlich Franz-Josef
Bochumer Eisenhutte Heintzmann GmbH & Co. KG
Dubno Herbert
Lagman Frederick L.
Wilford Andrew
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