Casing panel

Details Casing panel Casing panel

1975-03-19

1976-12-14

Shapiro, Jacob

52245, E21D 1114

Patent

active

039967522

ABSTRACT:
Casing panel comprising voussoirs of the type comprising a web and juxtaposition walls which are substantially perpendicular to the web, wherein two juxtaposed walls, pertaining to two adjacent voussoirs of this panel, define therebetween a cavity for receiving a filling material and have, between said cavity and the outer surface of the webs of the voussoirs, bearing surfaces which are substantially parallel to the direction of the web and bear against each other so as to result in a high pressure drop in the flow of material between the exterior of the webs and the cavity.

REFERENCES:
patent: 34474 (1862-02-01), Bail
patent: 935376 (1909-09-01), Lennon
patent: 1125013 (1915-01-01), Dunlop
patent: 3483706 (1969-12-01), Taradash et al.
patent: 3859802 (1975-01-01), Platner et al.

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