Patent ID: 7322053

Claim:
A toilet-flushing device, comprising; a container for toilet flushing water, that is partially enclosed by two disc-shaped elastic membranes and partially by a rigid wall, which is cylindrical in shape and extends between the peripheries of the two membranes, the cylindrical wall having an unrestricted connection to a source of water under pressure that is sufficient to extend the two membranes and an outlet for a flushing valve located in a space defined by the cylindrical wall operable to release water from the container for a flush of a toilet bowl or urinal, a retaining structure to support the membranes against excessive extension, the retaining structure being a rigid wall with an aperture to allow air to move in and out as the membrane expands and contracts, wherein the toilet-flushing device further includes a flushing valve connected to the flushing outlet of the container, which valve comprises a valve seat, a diaphragm including a plug that can seat on the valve seat, a wall joining with the diaphragm to enclose a space within the diaphragm and the wall, an aperture in the plug upstream of the valve seat, and a control aperture in the wall downstream of the seat, that can be closed and opened by a control means operable by a user of the toilet-flushing device.