Catwalk device and method

Details Catwalk device and method Catwalk device and method

2006-11-28

2006-11-28

Lagman, Frederick L. (Department: 3673)

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

C405S283000, C405S272000, C405S274000, C182S112000, C182S115000, C182S109000

Reexamination Certificate

active

07140808

ABSTRACT:
A catwalk is provided for use in trenching operations that provides increased safety and improves efficiency. Methods are also provided that save time over the prior process of building multiple land bridges. Selected features include reduction in the number of ladders used increases worker safety, along with several other safety features such as catwalk railings, holding devices for ladders, etc. One catwalk is shown with a skid assembly to further increases efficiency by allowing the trench box to be towed with the catwalk in place.

REFERENCES:
patent: 4253547 (1981-03-01), Skaalen et al.
patent: 4825976 (1989-05-01), Wyse
patent: 5865567 (1999-02-01), Wilkinson
patent: 6907957 (2005-06-01), Couch
patent: 2004/0247398 (2004-12-01), Lane et al.
patent: 24 55 940 (1976-08-01), None
patent: 2353557 (2001-02-01), None

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