Patent · US Expired

Surface water drainage system

US7524133B2 · kind B2 · utility

1Cited by

13References

11Claims

0Family size

Assignee

ACO SEVRIN AHLMANN GMBH & CO KG · DE

Inventors

Heino Messerschmidt · Lütjenwestedt, DE
Michael Sieber · Kaufbeuren, DE
Markus Blaschke · Rendsburg, DE
Arne Stoltenberg · Büdelsdorf, DE

Key dates

Filing date	Jun 24, 2004
Grant date	Apr 28, 2009
Priority date	—
Expiry date	May 12, 2025

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE03F2005/065
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A surface water drainage system according to the present invention includes a structure that can be installed in the ground, and a cover that can be laid onto an upper edge of the structure. Fixation devices that are attached to the cover include a locking system in a form of elastic hook elements fixed to edges of the cover that can be brought into snap-on engagement with other locking system on the structure in order to retain the cover on the structure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.