Aco Severin Ahlmann Gmbh & Co Kg

Aco Ahlmann Se & Co. Kg

Aco Technologies Plc

James Canney

Jan Mieze

Arne Meincke

Arne Stoltenberg

Stephan Meier

Hans-Julius Ahlmann

Didier Ollivier

Jérôme Dubois

Andrew Allbright

Prasanna Kumar

Hans Olsen

Timo Elias

Neill Robinson

Thomas Dau

The invention relates to a support structure of a cover of a structure capable of being inserted into the ground, for example of a shaft or a channel, wherein the cover () comprises a traversable surface () and the support structure () extends downwards under said cover into the structure and comprises beam-shaped supports (-) such that their under support side () facing away from the surface () experiences a tensile stress when the surface () is loaded. The invention is further characterized in that between two areas (A, A') a thickness (D) of the carriers with minimum tensile stress is configured substantially symmetrically in an increasing manner up to a maximum value and then, in turn, in a decreasing manner to form a ball shape when viewing the cover from below.

Support structure of a cover

A stable and variable design of a drainage structure includes a drainage body () and a cover (). The cover () has engagement devices (') when seen in a longitudinal direction of the drainage body (), whereby the cover connects upper edges (&#x2032;) of the drainage body () to one another transversely to the longitudinal direction in a tension-resistant manner over the entire length of the drainage body. In order to allow the use of different covers () for different loads, for example while using the same drainage body (), two types of engagement devices (&#x2032;) are provided on the drainage body.

Drainage channel with a drainage body and a cover

Coverings for structures which can be installed in the ground are known. In order to lock the covering on the structure, closures are known which comprise a snap bolt which is designed in such a way and is mounted movably on the covering () against the force of a spring device in such a way that, during closing of the covering (), the snap bolt is forced back and snaps in behind a counterbearing (') fixed to the structure in a closure position. To simplify the arrangement and also to improve durability, it is proposed that the snap bolt is mounted in a housing () which can be fastened in a housing receptacle of the covering ().

Closure for locking a covering

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Bedfordshire, United Kingdom

James Canney