Abstract: The system for opening and/or closing an inlet valve (10) and/or an outlet valve (30) of a liquid container (24), particularly for water toilets, water tanks or the like, comprises an inlet tube (16) with an inlet valve (10) in the upper portion of the container (24) and an outlet tube (20) with an outlet valve (30) in the bottom portion (25) of the container (24), both valves (10, 30) being provided with a valve body. It is characterized by the use of a bistabile inlet valve (10) having a lag-free opening and closing characteristic without any intermediate opening position of the valve body (14; 38, 46), the closing stroke of the valve body being assisted by the flow of the liquid.

Abstract: The system for opening and/or closing an inlet valve (10) and/or an outlet valve (30) of a liquid container (24), particularly for water toilets, water tanks or the like, comprises an inlet tube (16) with an inlet valve (10) in the upper portion of the container (24) and an outlet tube (20) with an outlet valve (30) in the bottom portion (25) of the container (24), both valves (10, 30) being provided with a valve body. It is characterized by the use of a bistabile inlet valve (10) having a lag-free opening and closing characteristic without any intermediate opening position of the valve body (14; 38,46), the closing stroke of the valve body being assisted by the flow of the liquid.

Abstract: In a system made up of battery units (2) and corresponding terminal connectors (10), the battery units may be combined in different ways in order to obtain larger battery groups. Each battery unit (2) has one surface that forms a terminal area (3) and that includes two terminals (6, 7), this surface having longitudinal edges (4) with a length (a), and lateral edges (5) with a width (b), (a) being equal or nearly equal to (2b), and the distance of each terminal (6, 7) to the longitudinal edges (4), as well as to the adjacent narrow edge (5) being equal or nearly equal to (b/2). A terminal connector (10) connects two terminals (6, 7) of adjacent battery units (2, 2?) and includes an electrical junction (12) having two connection points (16, 17) at its ends and a span equal or nearly equal to (b). Vertical connectors may be provided to interconnect terminals of battery units belonging to different layers of stacked up batteries.