Abstract:
A process for converting manhole covers, gully gratings (2) or the like into liquid-permeable filter elements has the following steps: preparation of the gully grating (2) to be converted or perforation of the manhole cover to be converted; and covering the top side of the gully grating (2) or manhole cover with a prefiltering layer (8) made of a metal grid, perforated metal or plastic sheet, the free cross-section of the prefiltering layer (8) being smaller than that of the gully grating (2).
Abstract:
Liquid-permeable floor covering for floors that can be walked or driven on, and the like, made of two or more layers (1, 2), joined over the whole surface, of a cellular elastic plastic, with each floor-side layer (1) being considerably thicker than each surface-side layer (2), with the side of the covering in contact with the floor having in the corresponding floor-side layer liquid-drainage channels (3, 3') running in parallel and spaced apart formed in it, with further channels (4) branching off from these channels at intervals and running through the or each floor-side layer, these further channels (4) being cut or shaped into the or each floor-side layer (1) and opening downwards.
Abstract:
A filter element (1) for liquid permeable floor area fastening (17), a floor covering plate (15), a manhole cover (15), a sewage cavity or the like, with at least one pre-filtering layer (3) in the direction of the through-flow (2) and at least one following filter layer (4,4'), wherein the free through-flow sections (a, b, b') of each layer (3, 4, 4') increase from layer to layer in the direction of the through-flow. The filter also comprises a housing (5) which surrounds the filter layers (4,4') in a framelike manner and maintains them, wherein each filter layer (4,4') is formed from granular material and the grains are available in loose form or linked to each other by a weak binding agent.
Abstract:
Liquid-permeable floor covering for floors that can be walked or driven on, and the like, made of a cellular elastic plastic, with the side of the covering in contact with the floor having liquid-drainage channels (2, 2') running in parallel and spaced apart formed in it, with further channels (3) branching off from these channels and running through the covering at intervals, that are cut or shaped into the covering.
Abstract:
Liquid-permeable floor covering for floors that can be walked or driven on, and the like, made of two or more layers (1, 2), joined over the whole surface, of a cellular elastic plastic, with each floor-side layer (1) being considerably thicker than each surface-side layer (2), with the side of the covering in contact with the floor having in the corresponding floor-side layer liquid-drainage channels (3, 3') running in parallel and spaced apart formed in it, with further channels (4) branching off from these channels at intervals and running through the or each floor-side layer, these further channels (4) being cut or shaped into the or each floor-side layer (1) and opening downwards.
Abstract:
The invention relates to a shaft cover (1) having openings (2) through which a fluid medium is able to pass. Each of these openings (2) is fitted with at least one filter element (3) and the space left between the outer surface of the filter element (3) and the inner wall of the opening (2) is filled with an elastic material (4).
Abstract:
Device to introduce fluids into soil, filter beds, etc., or to remove them from same by means of a pipe-shaped body the wall of which is provided with porous passage zone (1, 4, 6) to allow radial flow. The body is constructed from rigid material of locally differing porosity, each passage zone (1, 4, 6) having two or more known layers in radial direction with the free cross section of the passage zone increasing per area unit from layer (2) to layer (3).
Abstract:
A ground surface consolidation system has at least one slab-shaped ground covering element (1) which can be walked or driven over, in particular an element made of highly resistant concrete and provided with a plurality of vertical flow passages (2) for surface water. These passages have an inflow section (4) which tapers in the flow direction (3) and have the shape of a cone or truncated pyramid, ending at an outflow section (5) with a constant or widening cross-section. A filter element (10) made of porous material and having the shape of a cone or truncated pyramid is set into the inflow section (4).
Abstract:
A ground surface consolidation system has at least one slab-shaped ground covering element (1) which can be walked or driven over, in particular an element made of highly resistant concrete and provided with a plurality of vertical flow passages (2) for surface water. These passages have an inflow section (4) which tapers in the flow direction (3) and have the shape of a cone or truncated pyramid, ending at an outflow section (5) with a constant or widening cross-section. A filter element (10) made of porous material and having the shape of a cone or truncated pyramid is set into the inflow section (4).
Abstract:
Device to introduce fluids into soil, filter beds, etc., or to remove them from same by means of a pipe-shaped body the wall of which is provided with porous passage zone (1, 4, 6) to allow radial flow. The body is constructed from rigid material of locally differing porosity, each passage zone (1, 4, 6) having two or more known layers in radial direction with the free cross section of the passage zone increasing per area unit from layer (2) to layer (3).