Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1996-12-03
1999-02-02
Graysay, Tamara L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
405282, E02D 1708
Patent
active
058655670
ABSTRACT:
An improved movable trench shoring device having a trench box depending from a frame, the frame including a pair of end frame members, a pair of side frame members and a pair of cross frame members. A pair of wheel assemblies are mounted along either of the two sides of the device allowing the device to be rolled along the ground. Each end frame members are configured to accommodate a removable frame member extension which allows the width of the trench shoring device's wheel base to be widened. A trench box depends below the frame from a pair of vertical support members. A pair of offset spreader couplings attached to the trench box spreaders accommodate attachment of the trench box to the vertical support members in a manner which allows the trench box to be raised substantially above the elevation of the frame.
REFERENCES:
patent: 3788086 (1974-01-01), West, Jr.
patent: 4874271 (1989-10-01), Arnold
patent: 5306103 (1994-04-01), Spencer
Graysay Tamara L.
Holland Joseph W.
Mayo Tara L.
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