Accessory i.e. relief valve exchanging device for pressure fluid reservoir, has tool accommodating transit of chamber to open valve in other chamber on outer shell projection of accessory to separate accessory from external threads

摘要

The device has a chamber (32) forming a sealed space for a reservoir located outside of a protruding member of an accessory (18). The space has a space connecting part (26) to accommodate a connection with a holder connecting part (14). Another chamber (40) is equipped with a transit (70), and a valve (50) is located between the chambers in an open position and a closed position. A tool (74) accommodates the transit of the latter chamber to open the valve in the former chamber on an outer shell projection of the accessory to separate the accessory from external threads (20). An independent claim is also included for a method for exchanging an accessory of a pressure fluid reservoir.