Abstract: A stroller having a central hub system that is reversible and foldable is provided. In one example, support members of the stroller chassis (e.g., members supporting the front wheels, back wheels, handle bar(s), and child seating surface) extend from the central hub system and are selectively rotatable there around. In some examples, the central hub system allows a user to collapse or fold the stroller from a first operational position (e.g., suitable for supporting a child) to a second collapsed position (e.g., where the support members rotate around the central hub system together to a more compact position relative to the operational position). In some examples, the collapsed position may be achieved in a single step (e.g., motion), and by one hand, of the user. The central hub system may also allow for reversing the handlebar to support the child in either a forward or rear facing configuration.

Abstract: A convertible stroller for selectively converting between two different active use modes is provided. The convertible stroller may include a frame supporting at least one front wheel, rear wheels, and a seat base for supporting (or including) a seating surface. The seat base is operable to be selectively positioned in at least two different use modes, a first use mode and a second use mode, wherein the first use mode positions the seat base at a relatively higher position than in the second use mode. In some examples, the frame and/or wheels are also operable to transition to a longer wheel base in the second use mode.

Abstract: A convertible stroller for selectively converting between two different active use modes is provided. The convertible stroller may include a frame supporting at least one front wheel, rear wheels, and a seat base for supporting (or including) a seating surface. The seat base is operable to be selectively positioned in at least two different use modes, a first use mode and a second use mode, wherein the first use mode positions the seat base at a relatively higher position than in the second use mode. In some examples, the frame and/or wheels are also operable to transition to a longer wheel base in the second use mode.

Abstract: A modularly constructed power converter arrangement has two end-side elements and at least one power converter module arranged therebetween. One end-side element has, a fan of an air cooling device, while the other end-side element has, aligned with the fan, cutouts acting as air passages. At least one end-side element has an electrical connection device. The at least one power converter module has, as part of the cooling device, a heat sink, through which air can flow from one end-side element to the other and on which is arranged at least one power semiconductor module connected to a control device and to a capacitor device. For this purpose, the at least one power converter module has a housing, which is open at the end sides and which can be connected in each case at the end sides to an end-side element or a further power converter module.

Abstract: A modularly constructed power converter arrangement has two end-side elements and at least one power converter module arranged therebetween. One end-side element has, a fan of an air cooling device, while the other end-side element has, aligned with the fan, cutouts acting as air passages. At least one end-side element has an electrical connection device. The at least one power converter module has, as part of the cooling device, a heat sink, through which air can flow from one end-side element to the other and on which is arranged at least one power semiconductor module connected to a control device and to a capacitor device. For this purpose, the at least one power converter module has a housing, which is open at the end sides and which can be connected in each case at the end sides to an end-side element or a further power converter module.