Water saver fill valve and assembly

摘要

An improved fill valve has a pivot valve body that is pivotally suspended immediately below a float housing and is movable between two positions. In a first position, the pivot valve body blocks the flow of water from the float housing. In a second position, the pivot body allows the flow of water from the float housing. The pivot valve body has two top compartments, each separated from the other by a wall. The first compartment retains an amount of water in it. The second compartment functions as a water flow restriction apparatus and includes an upwardly-extending member for sealing off a check valve that is disposed within the bottom of the float housing. A pressure compensating drip emitter allows water to trickle into the float housing at a very slow rate. The emitter comprises a labyrinth structure having a plurality of serpentine pathways formed in its outer surface.

主权项

1. An improved fill valve for a water storage tank, said fill valve comprising a riser assembly, a valve housing mounted on an upper end of the riser assembly, a pilot valve mounted in the valve housing, a float housing connected to the valve housing and a combination float arm and float, the float arm being pivotally connected to the valve housing and having a first end for opening and closing a pilot orifice in the valve housing and a second end connected to the float, the float being located in the float housing, the float housing having an inlet opening for allowing water to spill into the float housing so that the float rises rapidly upwardly and the first end of the arm fully seals off the pilot orifice, an opening in a bottom wall of the float housing and a check valve mounted in the opening for permitting water to drain from the float housing only after a water level of a storage tank in which the fill valve is mounted is below a bottom of the float housing, the improvement comprising:
a pivot valve body; means for pivoting the pivot valve body between a first position and a second position; and a pressure compensating drip emitter, the drip emitter comprising a tube-like structure that comprises a chamber having a lower chamber portion, an upper chamber portion and an emitter plug, the upper chamber portion housing a labyrinth structure with outlets, the labyrinth structure comprising a substantially cylindrical structure comprising an upper portion, a lower portion, an inner chamber and an outer surface; wherein the pivot valve body in the first position allows the check valve to be in an open position; wherein the pivot valve body in the second position allows the check valve to be in a closed position; and wherein the drip emitter trickles water into the float housing.