1976-10-26
1977-11-08
Taylor, Dennis L.
61105, E21D 500, E21D 512
Patent
active
040569403
ABSTRACT:
A trench shoring assembly including first and second spaced walls having upper surfaces with third and fourth spaced walls stacked upon the upper surfaces of the first and second walls. A plurality of tubular collars project from the various walls and are aligned vertically at each end thereof. Spreader pipes interconnect these collar projections at one end of the assembly and a spreader assembly interconnects the stacked walls at the other end. More specifically, the spreader assembly includes vertically extending metal beams interconnecting the collars projecting from the walls and tie bars extending between the vertical beams at a position spaced well above the upper surfaces of the lower walls thereby facilitating a pipe having a diameter which is greater than the vertical height of the lowermost walls. In the first embodiment the tie bars are adjustable to vary the spacing between the spaced walls, whereas in the second embodiment they are not adjustable and a plate is secured thereto and depends therefrom and includes an arcuate cutout for surrounding the pipe or conduit.
REFERENCES:
patent: 2777294 (1957-01-01), Rosa et al.
patent: 2865178 (1958-12-01), Wicke
patent: 2956409 (1960-10-01), Wicke
patent: 3541799 (1970-11-01), Jost et al.
patent: 3782126 (1974-01-01), Pavese
patent: 3820345 (1974-06-01), Brecht
Griswold Machine & Engineering Inc.
Taylor Dennis L.
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