Trench shoring machines

Details Trench shoring machines Trench shoring machines

1976-12-20

1978-05-30

Shapiro, Jacob

61 85, E21D 512

Patent

active

040916260

ABSTRACT:
A trench shoring machine comprises front and rear frameworks movable forwardly relative to each other and a series of longitudinally extending piles arranged along each side of the frameworks and movable longitudinally and independently of the frameworks. The piles are provided with rearward extensions which are laterally spaced from side elements of the rear frameworks so that lining members may be located between said rearward extensions and said elements to shore the trench sides after advance of the piles.

REFERENCES:
patent: 3916629 (1975-11-01), Thompson
patent: 3967454 (1976-07-01), Barnes
patent: 3994139 (1976-11-01), Folk

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