Apparatus for forming a trench

Details Apparatus for forming a trench Apparatus for forming a trench

1989-07-07

1991-03-19

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

249 10, 405118, E02B 500

Patent

active

050006215

ABSTRACT:
A device for forming a trench having a pair of frame members each having a first adjustment slot therethrough, a form pan having sidewalls, the sidewalls having an adjustment slot in registration with the first adjustment slot of the frame members, and means for adjustably securing the form pan to the frames through the first and second adjustment slots to allow positioning of the form pan relative to the frames.

REFERENCES:
patent: 786305 (1905-04-01), McIntyre
patent: 1473551 (1923-11-01), Gschwind
patent: 1562780 (1925-11-01), Mickleson
patent: 2938437 (1960-05-01), Daley
patent: 3299785 (1967-01-01), James
patent: 3362167 (1968-01-01), Ward
patent: 3625011 (1971-12-01), Stevenson
patent: 4472078 (1984-09-01), Karbstein

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