A toilet reservoir water flushing valve for sealing an outlet of said toilet reservoir and for controlling the amount of water released from said reservoir during a flush, said flushing valve comprising:
- a first hollow housing adapted for mounting in said reservoir, said housing having:
- a bottom portion, a top portion, an open bottom end, and a hollow interior, said interior adapted to be sealed against undesired intrusion of water from said reservoir;
- a vent valve mounted in said top portion of said housing, said vent valve having a vent bore therein for communicating said hollow interior with said reservoir, said vent valve adapted to be controlled by a flushing lever associated with said toilet reservoir;
- a water conduit having a first end adapted for connection to a pressurized water supply line, a water conduit branch having a first end connected thereto and a second end extending therefrom, and a radial bore therethrough;
- a perforated wall connected to said bottom portion of said housing in said interior and covering said open bottom end, a second end of said water conduit being connected to a bottom surface of said perforated wall and opening therethrough into said first housing;
- a water-impervious membrane connected to said housing in said interior above said perforated wall and below said vent valve such that said membrane seals and unseals said perforated wall against flow of water therethrough, said membrane forming a pocket above said perforated wall at said connection of said water conduit thereto;
- said second end of said water conduit branch being connected to said top portion of said housing above said membrane so as to communicate water from said water conduit to said top portion of said housing;
- a second hollow housing having:
- an open upper end connected to said open bottom end of said first housing adjacent said perforated wall, an open lower end adapted for connection around an outlet opening in said toilet reservoir, and a surrounding side wall having openings therein for communicating an interior of said second housing with water in said toilet reservoir;
- a valve seat adjacent said open lower end;
- a valve for selectively covering and uncovering said valve seat so as to selectively permit flow of flushing water from said reservoir therethrough, into said outlet of said reservoir, and into an associated toilet bowl;
- a rod having a first end, a body, and a second end, said first end being connected to said valve, said body being sealingly received in said bore of said conduit, said second end protruding through said bore, above said perforated wall, and into said pocket formed by said membrane, said rod having an axial bore therein extending from said second end into said conduit for allowing water to flow from said conduit into said pocket;
- a disk connected to said second end of said rod for sealing said conduit against flow of water thereinto from said pocket;
- whereby,
- in a non-flush position, said vent valve seals said first housing from said toilet reservoir and pressurized water from said supply line is communicated through said water conduit, said water conduit branch, and into said interior of said first housing above said membrane, said pressurized water pressurizing said interior of said first housing, forcing said membrane downwardly to seal said perforated wall, pressurized water also entering said pocket through said axial bore in said rod, said water in said pocket urging said disk against said conduit and biasing said second end of said rod downwardly, pushing said valve onto said valve seat so as to preclude flow of water from said toilet reservoir into said second housing and through said outlet;
- and whereby,
- operation of said flushing lever moves said vent valve such that said vent bore establishes communication between the interior of said first housing, which is pressurized by said pressurized water supply, and said toilet reservoir, which is at a lower pressure, causing pressurized water from said first housing to be evacuated into said reservoir and allowing said membrane to move upwardly and unseal said perforated wall, said evacuation also allowing said second end of said rod to move upwardly and unseat said valve to allow water from said toilet reservoir to flow therethrough, into the outlet, and into said bowl to flush the contents thereof.