Overflow control apparatus for water closets

Claim 1

Overflow control apparatus in combination with a water closet having a tank, a vertically disposed overflow tube mounted in said tank, a bowl refill tube having its distal end communicating with an open upper end of said overflow tube, a bowl, flush valve means movable between a normally closed position stopping communication of water from said tank to said bowl, and an open position communicating water from said tank to said bowl, and means for selectively moving said flush valve means to its open position, said overflow control apparatus comprising shut-off means for applying a closing force to said flush valve means to move it from its open position and to hold it at its closed position, said shut-off means comprising reciprocal plunger means reciprocally mounted on said overflow tube, vertically above said flush valve means, for being released and dropped vertically under the influence of gravity from a raised position to a lowered position for applying said closing force to said flush valve means to move it from its open position and to hold it at its closed position, trip means movably mounted on said overflow tube for movement from a first position for holding said plunger means in its raised position to a second position releasing said plunger means to permit it to drop to its lowered position, and control means for moving said trip means from its first position to its second position, the distal end of said bowl refill tube being secured to said trip means to communicate pressurized water into the upper end of said overflow tube when said trip means is in its first position and movable with said trip means to communicate pressurized water exteriorly of said overflow tube and into said tank directly when said trip means is moved to its second position by said control means.