Abstract: A foldable scooter has a first frame section hingedly connected to a second frame section and supported by front and rear wheels, and a locking organ for locking the foldable scooter in an unfolded state. Two longitudinally extending, spaced-apart shield elements extend upward from the second frame section. When folded, tops of the first and second frame sections face each other, with the at least one rear wheel between sides defined by the shield elements. The front wheel(s) is (are) steerable, but can be pivoted to a location at least partially between the sides defined by the shield elements.

Abstract: The invention relates to a foldable scooter capable of being in a first, unfolded state for transporting a person and in a second, folded state, the foldable scooter comprising a frame having a base comprising a first face capable of serving as a footrest and a second face opposite of the first face, at least one rear wheel being provided at said second face of the base; the foldable scooter further comprising a steering organ and at least one front wheel attached to the steering organ.

Abstract: The invention relates to a vertical-axis wind turbine and at least 2 turbine blades, wherein every turbine blade is connected via a supporting arm and a connecting element that can be purely tensile-loaded to the rotatable vertical axis. According to the invention, between the connecting element that can be purely tensile-loaded and the supporting arm a blade is provided that is convex at an angle of attack side defined by the turbine blades and is concave at the other side. The invention also relates to a method for manufacturing a wind turbine.

Abstract: The invention relates to a vertical-axis wind turbine and at least 2 turbine blades, wherein every turbine blade is connected via a supporting arm and a connecting element that can be purely tensile-loaded to the rotatable vertical axis. According to the invention, between the connecting element that can be purely tensile-loaded and the supporting arm a blade is provided that is convex at an angle of attack side defined by the turbine blades and is concave at the other side. The invention also relates to a method for manufacturing a wind turbine.

Abstract: The present invention relates to a solar collector having an integrated heat storage (ICS), in which between an involute mirror and a transparent cover plate a storage tank for the storage of water is provided and in which the storage tank is provided with a light absorbing fin. At the lower end near the circumference of the storage tank the ICS according to the invention is provided with a fin system which comprises a light absorbing fin having a length in the longitudinal direction of the storage tank of at least 10 cm, and the fin system is designed such that the ICS lower end is shielded to a great extent, as a result of which losses by radiation and convection of air are restricted. Thus, the fin system has a double function.

Abstract: The present invention relates to a solar collector having an integrated heat storage. Such a solar collector comprises a housing which comprises a bottom plate and a transparent cap, wherein between an involute mirror and the transparent cap a storage tank for the storage of water is provided. The solar collector according to the invention is characterized in that a shielding is provided between the transparent cap and the storage tank, which leaves the part of the storage tank that is situated lower uncovered. By using the solar collector according to the invention a higher thermal yield can be achieved while using less materials.

Abstract: The present invention relates to a device for supporting one or more solar panels or thermal collectors which may be arrangeable on a flat roof. The device has a bottom wall, a rear wall which extends upwardly from a rear side of the bottom wall, and two oppositely arranged side walls which are integrally joined with side edges of the bottom wall and rear wall. The side walls slope from the rear wall to a front edge of the bottom wall.