US 4,952,094 AGranted

Ground water drain

AssigneeVon Roll AG

InventorsHansruedi Spiess, Francois Galvanetto

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Abstract

The ground water drain comprises a frame and a grating inserted in the frame. The grating has a central bar and a plurality of crossbars arranged normal to the central bar. Holding portions are provided in the frame over its support for the grating. Projecting portions formed on some crossbars project into the holding portions when grating is inserted into the frame. For the insertion of the grating, at least one projecting portion on one side of the grating is inserted into the corresponding holding portion and subsequently the opposite side of the grating is pressed down. The projecting portions have sloping faces which snap into the holding portions of the frame while the central bar is simultaneously elastic bent. Therefore the grating is positively secured in the frame and even when using an elastic material for the grating the latter cannot be moved to such an extent by the traffic travelling over it that it could jump out of the frame.

Claims12

Dependent claims

Ground water drain for covering a ground opening, comprising a frame to be laid in the ground, and a grating supported in said frame, the grating being made from a high elasticity material and being insertable in the frame utilizing the elasticity of said material, the grating being held in the frame with a positive fastening, said grating comprising at least one main bar extending in an axial direction of the grating, and a plurality of crossbars integral with said main bar and extending essentially in the same plane with and at right angles to said main bar, said grating including at least three projecting projections formed on said crossbars, said frame being provided with holding portions, said projecting portions of said crossbars cooperating with said holding portions so that, accompanied by the elastic deformation of said main bar, said projecting portions being situated at a side of said grating opposite to that carrying at least another of said projecting portions, at least one of said projecting portions being formed at a free end of the respective crossbar.

Dependencies are inferred from the claim text.