Apparatus for forming a trench

Details Apparatus for forming a trench Apparatus for forming a trench

1994-07-22

1996-07-23

Taylor, Dennis L.

Hydraulic and earth engineering

Fluid control, treatment, or containment

Flow control

405119, 249 11, 249177, 404 2, 404 4, E02B 500

Patent

active

055383610

ABSTRACT:
A system for forming a single-walled trench comprising a pair of frame members, each having a horizontal section and a section depending from the horizontal section; a collapsing pair of wall pans having sidewalls interior to the depending portion of the frame members, a bottom floor disposed between the sidewalls, a releasing mechanism to collapse inward the sidewalls, a device which collapses the sidewalls inward and removes the entire bottom and sidewalls from the poured trench leaving the frames embedded securely in the concrete; and adjustable anchoring means attached to the frame members for providing vertical adjustment of the frame members relative to the ground and each other, leaving all but the frame members available for re-use.

REFERENCES:
patent: 988049 (1911-03-01), Tingley
patent: 1008264 (1911-11-01), Hill
patent: 1700889 (1929-02-01), Heltzel
patent: 1722038 (1929-07-01), Dougherty
patent: 2896301 (1959-07-01), Barron
patent: 2917804 (1959-12-01), Barron
patent: 4085918 (1978-04-01), Wilkerson
patent: 4258897 (1981-03-01), Stees
patent: 4993877 (1991-02-01), Beamer
patent: 4993878 (1991-02-01), Beamer
patent: 5000621 (1991-03-01), Beamer
patent: 5256000 (1993-10-01), Beamer
patent: 5281052 (1994-01-01), Beamer
patent: 5326189 (1994-07-01), Beamer
patent: 5326190 (1994-07-01), Beamer

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