Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Reexamination Certificate
2005-02-01
2005-02-01
Lee, Jong-Suk James (Department: 3673)
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
C405S282000
Reexamination Certificate
active
06848865
ABSTRACT:
A device for shoring trenches having rails, panels and articulated trusses such that pairs of opposite rails are upheld vertically by trusses and spaced along the trench to support shoring panels which slide past each other vertically within guides of adjacent rails; the rail having a back flange welded on a main rectangular tube which is provided on either side with two lateral rectangular tubes welded offset and inward past the main tube such that with a front flange welded on each lateral tube shape two vertical guides on either side of rail, the front flanges being projecting into the space between lateral tubes creating a guide contouring the edge of articulated truss which slides interlocked within; the panel being provided with special edges that interlock within vertical guides of rail, the truss being articulated and provided with roller to displace along the front flanges of the rails.
REFERENCES:
patent: 3910053 (1975-10-01), Krings
patent: 3950952 (1976-04-01), Krings
patent: 4657442 (1987-04-01), Krings
patent: 5310289 (1994-05-01), Hess
patent: 5503504 (1996-04-01), Hess et al.
patent: 6164874 (2000-12-01), May
patent: 004322336 (1995-01-01), None
Lee Jong-Suk (James)
Oak Eugene
Saldano Lisa M.
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