Abstract: Car seat adaptor (1), in particular for mounting a portable car seat in a cargo bike. The adaptor comprises a support frame (2) with two parallel supports (3), and a pair of couplers (5), both supports being provided with one of the couplers and with a spring suspension (6) between the coupler and the respective support.

Abstract: A heat exchanger assembly includes at least one coil shaped heat exchanger pipe assembly for passing through a fluid to be heated, which has an inlet, an outlet and coil windings extending concentrically around a coil axis. The heat exchanger assembly further includes a housing in which the heat exchanger pipe assembly is received, such that a flue gas transport gap extends between the heat exchanger pipe assembly and the circumferential wall. In use, hot flue gas passes the coil windings, thereby imparting the heat to the fluid present in the heat exchanger pipe assembly. The housing has a first and a second end wall which close off a first end and a second end of the circumferential wall. The housing is made of plastic and the heat exchanger pipe assembly is clamped in axial direction between the first and the second end wall of the plastic housing.

Abstract: A heat exchanger assembly including at least one coil shaped heat exchanger pipe assembly for passing through a fluid to be heated. The heat exchanger pipe assembly has an inlet and an outlet and includes coil windings extending concentrically around a coil axis. The heat exchanger assembly further includes a housing in which the heat exchanger pipe assembly is received, such that a flue gas transport gap extends between the heat exchanger pipe assembly and the circumferential wall. In use, hot flue gas passes the coil windings, thereby imparting the heat to the fluid present in the heat exchanger pipe assembly. The housing has a first and a second end wall which close off a first end and a second end of the circumferential wall. The second end wall includes a burner cover opening in which a burner cover can be mounted. The housing is made of plastic and the heat exchanger pipe assembly is clamped in axial direction between the first and the second end wall of the plastic housing.