Trench shield assembly

Details Trench shield assembly Trench shield assembly

1992-06-02

1994-01-11

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405272, E02D 302

Patent

active

052775224

ABSTRACT:
A trench shield has a pair of upright shields laterally spaced from each other with spreaders. Each shield has a frame supporting side walls and a horizontal earth penetrating blade. A pounding rail is releasably mounted on a channel top member of the frame. The pounding rail is an inverted channel member located in the channel of the top member. Rods secured to opposite sides of the pounding rail cooperate with the top member to retain the pounding rail on the top member and allow removal of the pounding unit from the top member. Collars secured to opposite ends of the frame accommodate the spreaders.

REFERENCES:
patent: 4019329 (1977-04-01), Griswold
patent: 4058983 (1977-11-01), Griswold
patent: 4193717 (1980-03-01), Treacy
patent: 4259028 (1981-03-01), Cook
patent: 4659260 (1987-04-01), Morelli
patent: 4850747 (1989-07-01), Morelli
patent: 4993880 (1991-02-01), Collins
patent: 5096334 (1992-03-01), Plank
patent: 5193928 (1993-03-01), Akesaka
Griswold Machine and Engineering, Inc. publication Catalog No. 220-A; p. 9.

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