Abstract: A device designed to relieve expanded volume, flow and pressure within a water pipe system by utilizing a pair of spring loaded pistons within a valve body, such that the increases volume caused by various sources can be accommodated within the valve body by the spring loaded pistons. The device allows normal flowing under regular operating parameters and will perform its function automatically as the flow and pressure increases beyond the spring setting. The device will reset to its starting configuration after the operating parameters return to normal without external monitoring or input.

Abstract: The invention relates to a device for displacing a person situated on a mobile or drivable base. Said device comprises a holding, steering, or guiding rod (3) comprising steering and holding handles (5) which the person can hold on to. The inventive device also comprises a carrying wheel (7) which is located at the opposite end to the holding handles (5) on the rod (3). The device is driven by an electric motor (11) arranged inside the carrying wheel. A drivable base (35) is arranged on or in the device in such a way that it can be removed, in order to optionally receive the person moving with said device.