Lightweight trench shield

Details Lightweight trench shield Lightweight trench shield

2007-11-06

2007-11-06

Mayo, Tara L. (Department: 3671)

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

C405S272000

Reexamination Certificate

active

11010611

ABSTRACT:
A lightweight trench shield having side panels spaced apart by spreaders. Each panel has a core formed of a metal honeycomb with the core faces having a fiber in resin matrix layer thereon. The core density varies with regions proximate the spreader supports being increased to provide support for side loads. The spreader supports receive the ends of the spreaders and distribute the applied loads outwardly from the spreader via a mounting ring.

REFERENCES:
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patent: 4641468 (1987-02-01), Slater
patent: 4983076 (1991-01-01), Vidal
patent: 5305568 (1994-04-01), Beckerman
patent: 5310290 (1994-05-01), Spencer
patent: 5503504 (1996-04-01), Hess et al.
patent: 5549418 (1996-08-01), Devine et al.
patent: 5741091 (1998-04-01), St. George et al.

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