Trench shield having wheels simultaneously provided for protecti

Details Trench shield having wheels simultaneously provided for protecti Trench shield having wheels simultaneously provided for protecti

1999-04-14

2000-12-05

Lillis, Eileen D.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405272, 405282, E02D 1708

Patent

active

061557501

ABSTRACT:
A trench shield includes: a pair of shielding wheels rotatably mounted on a pair of retaining plates; a plurality of brace members passing through two retaining plates for retaining the two shielding wheels, each shielding wheel formed as a protective circular panel for shielding a side wall of a trench excavation for preventing collapse of the trench walls; and two control devices each provided for locking or unlocking each shielding wheel on each retaining plate; whereby upon unlocking of the wheels from the retaining plates and upon rolling of the wheels in the trench, the trench shield will be forwardly moved conveniently and smoothly.

REFERENCES:
patent: 3710583 (1973-01-01), Blackwell
patent: 3820345 (1974-06-01), Brecht
patent: 5306103 (1994-04-01), Spencer
patent: 5865567 (1999-02-01), Wilkinson

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