Abstract: An ozone treatment system which is usable in enclosed or confined spaces for the inactivation of pathogens such as bacteria and viruses in these spaces.

Abstract: A drive assembly has a transmission arrangement including a plurality of portions and a wire connecting the portions in the longitudinal direction while allowing limited pivotal movement of the portions transversely to the longitudinal direction. A guide tube guides the transmission arrangement around a curve, A drive motor pushes the transmission arrangement along the guide tube to cause the transmission arrangement to extend from the guide tube to apply a thrust drive force. The drive assembly can be used in a bath aid unit.

Abstract: A seat unit includes a frame structure and a seat. A linkage assembly interconnects the frame structure and the seat for displacement of the seat relative to the frame structure between a lowered sitting position and a raised position to provide assistance for the person using the seat unit to stand up therefrom. The linkage assembly causes the rearward part of the seat to be raised by a greater distance than the front part so that the seat also tilts forwardly. First and second springs urge the seat towards its raised position, the springs being operable in combination to produce an overall spring force urging the seat towards its raised position with a spring force value which is of a desired magnitude in each part of the movement towards the raised position.