Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Reexamination Certificate
2006-06-02
2008-07-22
Bagnell, David J. (Department: 3672)
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
C405S282000, C405S272000, C405S157000
Reexamination Certificate
active
07402003
ABSTRACT:
There is disclosed an apparatus and method for moving with an excavator arm a trench box having a pair of adjacent spreader bars at a forward end. The apparatus has a bracket end for connecting to the excavator arm and a hooking fork. The hooking fork has a first surface that engages the first spreader bar of the trench box. The apparatus also includes a second surface for engaging the adjacent second spreader bar when used to lift the trench box from the trench or move the trench box along the trench floor.
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Andrish Sean D
Bagnell David J.
Herberger Robert J.
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