E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
61/60
E21D 5/04 (2006.01) E21D 5/012 (2006.01) E21D 5/11 (2006.01)
Patent
CA 1094832
ABSTRACT OF THE DISCLOSURE A flexible and water-tight composite shaft of the type comprised of a plurality of annular concrete sections stacked on top of each other with a soft. sealing intermediate layer disposed between adjacent rings. At least one steel cylinder is provided exteriorly of the concrete cylinder It is also composed of a plurality of cylindric or annular sections joined with each other by spring rings which are preferably arranged such that they bit into or engage edges of two adjacent concrete rings. The spring rings are welded to the respective steel cylindric sections in water-tight fashion whereby the entire assembly is flexible and thus more capable of withstanding rock pressure particularly in extreme depths of a mining shaft, while remaining water-right.
321348
Lendla Heinz
Link Heinz
Schupp Heribert
Gowling Lafleur Henderson Llp
Gutehoffnungshutte Sterkrade Aktiengesellschaft
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