Patent ID: 6880181
Filing Date: 2005-04-19
Classification: E03D

Abstract:
1. An apparatus for delaying the closing of a flapper valve during the flushing of a gravity-operated toilet, comprising: a pair of lever arms each having an intermediate segment configured for pivotal mounting on a pair of pivot pins, which pins each pivotally support a corresponding end of a pair of mounting arms of a flapper valve having a body portion that normally seals a flush valve mounted in a bottom wall of a toilet tank, each of the lever arms having a forward end configured to engage and provide a lifting force on a corresponding one of the flapper valve mounting arms when the lever arm and the flapper valve mounting arm are rotated in a first direction to a first position upon manual actuation of a flush control to unseal the body portion from the flush valve to permit a first volume of water in the toilet tank to drain through a drain hole surrounded by the flush valve; and a counterweight reservoir connected to a pair of rearward ends of the lever arms for holding a volume of water that delays rotation of the lever arms and the flapper valve mounting arms in a second direction opposite the first direction to seal the body portion with the flush valve until a predetermined amount of a second volume of water has drained through an outlet aperture in a bottom portion of the counterweight reservoir.