A fastener, includes a first clip member having a first base portion and two first arm portions that extend upwardly from two sides of the first base portion, a second clip member locked with the first clip member and having a second base portion and two second arm portions that extend upwardly from two sides of the second base portion, and at least one hook portion extending from a distal end of one of the first and second arm portions, wherein the first and second clip members are arranged horizontally along two different directions, the second base portion is positioned on the first base portion.

A fastener, includes a first clip member having a first base portion and two first arm portions that extend upwardly from two sides of the first base portion, a second clip member locked with the first clip member and having a second base portion and two second arm portions that extend upwardly from two sides of the second base portion, and at least one hook portion extending from a distal end of one of the first and second arm portions, wherein the first and second clip members are arranged horizontally along two different directions, the second base portion is positioned on the first base portion.

The invention relates to a gutter system (1) comprising at least one frame unit (10), at least one cover unit (20) and at least one securing element (30), wherein the frame unit (10) comprises at least one receiving area (12) for arranging the cover unit (20), and wherein the securing element (30) is adapted to engage in the cover unit (20) and to releasably engage in the receiving area (12) so the cover unit (20) can interlock in the receiving area (12) of the frame unit (10). The invention also relates to a cover unit (20) and a securing element (30).

The invention relates to a gutter system (1) comprising at least one frame unit (10), at least one cover unit (20) and at least one securing element (30), wherein the frame unit (10) comprises at least one receiving area (12) for arranging the cover unit (20), and wherein the securing element (30) is adapted to engage in the cover unit (20) and to releasably engage in the receiving area (12) so the cover unit (20) can interlock in the receiving area (12) of the frame unit (10). The invention also relates to a cover unit (20) and a securing element (30).

A drain cover assembly that retains mesh on its upper surface via a channel-fastening system that is integrated into the drain cover's perimeter zone. The mesh is retained on the upper surface of the drain cover in a robust and permanent fashion. The drain cover can be configured to provide structural rigidity for supporting a load applied to its upper surface. The drain cover can be adapted to allow for its use in existing or newly constructed drainage system installations. The meshed upper surface of the drain cover can be configured to be flat or raised in profile. The meshed upper surface of the drain cover prevents mosquito habitation and breeding within the associated drainage system and prevents fine debris particles from clogging the drainage system's flow conduit.

A drain cover assembly that retains mesh on its upper surface via a channel-fastening system that is integrated into the drain cover's perimeter zone. The mesh is retained on the upper surface of the drain cover in a robust and permanent fashion. The drain cover can be configured to provide structural rigidity for supporting a load applied to its upper surface. The drain cover can be adapted to allow for its use in existing or newly constructed drainage system installations. The meshed upper surface of the drain cover can be configured to be flat or raised in profile. The meshed upper surface of the drain cover prevents mosquito habitation and breeding within the associated drainage system and prevents fine debris particles from clogging the drainage system's flow conduit.

An inlet filter and method of use are disclosed. In one aspect, the inlet filter comprises a frame, filter material, a feed stream inlet, and a filtrate outlet. The frame is configured so an exterior of the frame is shaped like a wedge. In another aspect, the method comprises inserting an inlet filter into a storm sewer inlet. The inlet filter can be one of a plurality of inlet filters inserted into the storm sewer inlet, the filters cooperating to filter a feed stream entering the storm sewer inlet. In a third aspect, a system comprises a plurality of inlet filters configured to be coupled together to filter a feed stream to a storm sewer inlet. The system can be configured so that the width of the plurality of filters is adjustable. For example, a first inlet filter and second inlet filter can be slidably engaged with a connecting filter.

An inlet filter and method of use are disclosed. In one aspect, the inlet filter comprises a frame, filter material, a feed stream inlet, and a filtrate outlet. The frame is configured so an exterior of the frame is shaped like a wedge. In another aspect, the method comprises inserting an inlet filter into a storm sewer inlet. The inlet filter can be one of a plurality of inlet filters inserted into the storm sewer inlet, the filters cooperating to filter a feed stream entering the storm sewer inlet. In a third aspect, a system comprises a plurality of inlet filters configured to be coupled together to filter a feed stream to a storm sewer inlet. The system can be configured so that the width of the plurality of filters is adjustable. For example, a first inlet filter and second inlet filter can be slidably engaged with a connecting filter.

A modular element or semi-module for making underground structures of basins for the management of meteoric waters or for retaining soil includes a substantially planar base portion and one or more pillars rising from the base portion. Each pillar is hollow and has a first external wall defining at least one internal cavity, inside the cavity there being an internal tubular stiffening wall that is spaced from the external wall and has a prismatic shape or a shape substantially corresponding to that of the external wall.

A modular element or semi-module for making underground structures of basins for the management of meteoric waters or for retaining soil includes a substantially planar base portion and one or more pillars rising from the base portion. Each pillar is hollow and has a first external wall defining at least one internal cavity, inside the cavity there being an internal tubular stiffening wall that is spaced from the external wall and has a prismatic shape or a shape substantially corresponding to that of the external wall.