Patent ID: 11905696
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 11:
12. The pressure-assisted toilet flush system of claim 8, wherein:
the water drainage mechanism comprises a bottom cover and a membrane; the second vessel having a water storage chamber, a water drainage pit, and a drainpipe; the water drainage pit sinking into a bottom of the second vessel, and having an internal upper wall communicated with the water storage chamber and the drainpipe, respectively, the water outlet located at an output end of the drainpipe; the bottom cover installed in seal connection at an opening of the water drainage pit; the membrane movably fit at where the water drainage pit is communicated with the drainpipe, and working with the bottom cover to define a back-pressure chamber; the back-pressure chamber having a water supplement aperture communicating the back-pressure chamber with the water storage chamber, the back-pressure chamber further having at least one drain outlet communicated with the control mechanism, whereby when the water storage chamber feeds water, the water enters the back-pressure chamber through the water supplement aperture to increase a pressure in the back-pressure chamber, and when the drain outlet is open, the back-pressure chamber drains water to decrease the pressure so that the membrane varies with the pressure in the back-pressure chamber to come close to or go away from the drainpipe, thereby closing or opening the drainpipe.