Shoring device

Details Shoring device Shoring device

1992-04-24

1993-08-03

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405272, E02D 1706

Patent

active

052323129

ABSTRACT:
A shoring device for supporting a trench. The device has opposite shields of non-conductive material such as fiberglass. Hydraulic actuators extend between the shields. A spring return assembly also extends between the shields and is enclosed in a tube. A positive locking device may be secured to either the actuator or spring return assembly. In an alternate embodiment, the shields may have removable sections to accommodate obstructions in the trench.

REFERENCES:
patent: 3470699 (1969-10-01), Cox
patent: 3851856 (1974-12-01), Berg
patent: 4682914 (1987-07-01), Aihara et al.
patent: 4787781 (1988-11-01), Bradberry
patent: 4863315 (1989-09-01), Wickberg
patent: 5066353 (1991-11-01), Bourdo

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