Patent ID: 12227949

InFIG.1an exploded illustration of a part of a drainage system100is shown.FIG.3further illustrates a perspective view of the embodiment of the system according toFIG.1.

The system100comprises an outlet member10, a flow restrictor20, a first sealing member30, at least one first raising ring60and at least one second raising ring80. In particular, the outlet member10and the flow restrictor20are coaxially aligned with each other.

Furthermore, the part of the system100is illustrated with a clamping ring90and a cover member95.

The flow restrictor20comprises a contact portion22as well as a vertical chimney overflow member24for drainage of fluid. Thus, water can be drained through the flow restrictor20to the outlet member10as soon as the water level exceeds the height of the chimney overflow member24.

The outlet member10is a funnel-shaped outlet member10in order to facilitate drainage of fluid. The outlet member10comprises a flange portion12.

Inside the funnel-shaped outlet member10the clamping ring90can be arranged in combination with the second raising ring80. In particular, the raising ring80is supported by the clamping ring, comprising a funnel-shaped outer circumference to fit into the funnel-shaped outlet member10, at a lower side of the raising ring80.

Above the second raising80the flow restrictor20is arranged, whereby the second raising ring80supports the contact portion22of the flow restrictor20. Thus, a vertical distance between the flange portion12of the outlet member10and the contact portion22of the flow restrictor20can be set by the second raising ring80.

InFIG.1, the contact portion22of the flow restrictor20is provided in the form of a flange portion.

Further, according toFIG.1the second sealing member30is situated below the contact portion22of the flow restrictor20.

Above the flow restrictor20, in particular on the contact portion22of the flow restrictor20, at least one first raising ring60is arranged. According toFIG.1two first raising rings60are arranged on top of each other in order to provide an increased height for arrangement of the cover member95.

According toFIG.1the two first raising rings60are arranged on and/or above and/or along the flow restrictor20.

The second and/or the first raising rings80;60can be provided with a flange portion or any other kind of portion in order to be fixable to the outlet member10and/or the clamping ring90.

InFIG.2a cross-sectional view of the system100is shown.

In addition toFIG.1the system100is illustrated with the first sealing member30which is situated along the flange portion12of the outlet member10and reaches into the funnel-shaped outlet member10.

The second sealing member40is situated below the flow restrictor20, in particular below the contact portion22of the flow restrictor20. The second sealing member40can be adhesively bonded to the flow restrictor20or can be clamped to the flow restrictor20by additional clamping member.

Alternatively, the second sealing member40can be arranged and fixed on top of the flow restrictor20, in particular on top of the contact portion22of the flow restrictor20.

According toFIG.2, the first and second sealing member30;40are vertically and spatially separated from each other for providing a drainage function between the first and second sealing member30;40to the outlet member10. In particular, a drainage member70is arranged between the first and second sealing member30;40.

Furthermore, the first and second sealing member30;40can comprise several layers. According toFIG.2the second sealing member40can comprise a second liner and a second geotextile in order to provide an adequate sealing function. The first sealing member30can be provided as a first liner in order to seal any kind of insulation or the like being situated below and around the outlet member10.

The second sealing member40further extends in horizontal direction from the flow restrictor20and comprises horizontal ends42. At these horizontal outer end sides42, the second sealing member40further extends in vertical direction such that a water storage can be formed by the second sealing member40.

Additionally, within the additional water storage being particularily formed by the second sealing member40, a water storage member50can be provided in order to provide suitable stability of above arranged layers like any kind of planting.

The height of the planting layer or the like being arranged above can be defined by arrangement of one or multiple first raising rings60. According toFIG.2to raising rings60are provided such that a planting layer with a certain height can be provided on top of the long term water storage comprising a structural strengthening water storage member50.

In summary, by providing the flow restrictor20with a chimney-like outlet/chimney overflow member24in combination with the second sealing member40comprising vertically extending end sides42, a long term water storage is achievable.

In case the water level within the water storage exceeds a predetermined height, water can be discharged via the chimney overflow member/chimney-like outlet24of the flow restrictor20. Further, water can also be discharged by exceeding the vertical height of the end sides42of the second sealing member40. In this case, the water can be discharged through the discharge member70being situated between the first and second sealing member30;40to the outlet member10.

In summary the present invention provides a securely sealed option for providing a long term water storage or reservoir, whereby the second sealing member for providing a water reservoir is independent from the first sealing member. Thus, the first sealing member does not suffer from long term hydraulic pressure and can provide a secure seal of e.g. a rooftop structure.

Additionally, the present invention is cost efficient and easy to assemble on site, e.g. on a rooftop. Advantageously, the drainage member70in between the first and second sealing member30;40provides an additional drainage function in case of e.g. heavy rainfalls or the like leading to an exceeding water level in the water storage or in case of a blockage of the flow restrictor20. In this case, water can flow over the vertically extending side ends42of the second sealing member40and can be discharged through the drainage member70.

LIST OF REFERENCE SIGNS

10Outlet member12Flange portion20Flow restrictor22Contact portion24Chimney overflow member/chimney-like outlet30First sealing member40Second sealing member42Horizontal ends44Second liner46Second geotextile50Water storage member60First raising ring70Drainage member80Second raising ring90Clamping ring95Cover member100Roof drainage system