Shoring device with removable swivel side plates containing...

Details Shoring device with removable swivel side plates containing... Shoring device with removable swivel side plates containing...

2007-12-18

2007-12-18

Lagman, Frederick L. (Department: 3673)

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

C405S272000

Reexamination Certificate

active

11273606

ABSTRACT:
A shoring device is disclosed comprising a piston and a cylinder. The piston is axially expanded by compressed gas, whereby the shoring device engages two opposing surfaces. Removable swivel sideplates comprise détente sphere attachments by which the sideplates reversibly attach to the piston and cylinder. These attached removable swivel sideplates contain set screws which engage the sides of trenches and excavations which are lined with timbers or other materials.

REFERENCES:
patent: 3362168 (1968-01-01), Dotlich
patent: 3851856 (1974-12-01), Berg
patent: 4752157 (1988-06-01), Ischebeck et al.
patent: 4787781 (1988-11-01), Bradberry
patent: 5310290 (1994-05-01), Spencer
patent: 5503504 (1996-04-01), Hess et al.
patent: 6394405 (2002-05-01), Roxton et al.
patent: 6746183 (2004-06-01), Sullivan
patent: 6964542 (2005-11-01), Sullivan

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