Safety trench box

Details Safety trench box Safety trench box

1980-03-13

1982-01-12

Purser, Ernest R.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405284, E21D 500

Patent

active

043102670

ABSTRACT:
Disclosed herein is a safety trench box for use in protecting workmen from cave-ins while operating within an excavated area. The device includes a barrier which surrounds the work area having a depth substantially that of the trench and an opening along one wall of the barrier that allows work to be sequentially fed therethrough. The safety device includes a pair of runners upon which the device is carried so that advancing the safety device can be easily accomplished.

REFERENCES:
patent: 2633713 (1953-04-01), Shields
patent: 2865178 (1958-12-01), Wicke
patent: 3473336 (1969-10-01), Torti
patent: 3922866 (1975-12-01), Benning
patent: 4058983 (1977-11-01), Griswold

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