Water saver attachment for toilet tank flush valve

Claim 2

In a water saver attachment for toilet tank flushing assembly including a valve seat disposed in the tank exit port; a downwardly opening, hollow flush valve, said valve adapted to engage the valve seat to close said port; and a manually operated lever assembly connecting said flush valve and an external handle mounted on the tank, said lever adapted to raise said valve member out of engagement with the valve seat to open said port responsive to movement of said handle, the improvement comprising: a check valve for venting the interior of said hollow flush valve mounted on said flush valve and extending therethrough said check valve adapted to open responsive to movement of said flush valve out of engagement with the valve seat to vent air from the interior of said hollow flush valve, and to close responsive to movement of said flush valve into engagement with the valve seat; control means carried by said check valve for regulating the rate of flow therethrough.

Claim 3

The device of claim 1 wherein said Alve element movable in response to pressure on the upstream side greater than the pressure on the downstream side thereof, and adapted to seat in response to pressure on the upstream side less than the pressure on the downstream side thereof.

Claim 4

The device of claim 16 wherein said housing has an external circumferential groove therein for receiving the portion of said float member defining the second opening therein.

Claim 5

The device of claim 16 wherein the control means comprises: a member movably carried by said housing; means cooperating between said member and said housing for varying the area of said passage in response to axial movement of said member relative to said housing.

Claim 6

The device of claim 18 wherein said member is received in the fluid passage, said member having a port forming part of the passage whereby the axial movement of said member relative to said housing will vary the area of the port.

Claim 7

The device of claim 19 wherein axial movement of the member away from the housing increases the area of the passage to increase the rate of flow through said valve.

Claim 8

The device of claim 18 wherein said housing has a port downstream of said valve seat, the port forming a part of the fluid passage, and said member surrounds a portion of said housing downstream of said valve seat so that axial movement of said member relative to said housing will vary the area of said port.

Claim 9

The device of claim 18 further comprising stop means carried by said member within said passage, and engageable with said valve element for varying the maximum extent of displacement of said element away from said seat in response to axial movement of said member relative to said housing.

Claim 10

A kit for adapting a tank-type toilet flush valve to permit closing of said valve a preselected time after said valve opens to retain a preselected quantity of water in said tank after flushing said kit comprising: a check valve assembly for venting the interior of said hollow flush valve, said check valve adapted to open responsive to movement of said flush valve out of engagement with the valve seat to vent air from the interior of said flush valve, and to close responsive to movement of said flush valve into engagement with the valve seat, said assembly including a housing defining a fluid passage and carrying a valve seat in said passage; a valve element disposed in said passage said valve element movable responsive to pressure on the upstream side greater than the pressure on the downstream side thereof, and adapted to seat in response to a pressure on the upstream side less than the pressure on the downstream side thereof, said housing also defining a neck portion depending from the lower face thereof, said neck having an inlet port therein forming a part of said fluid passage, the external surface of said neck portion having a preselected cross-sectional configuration throughout the axial extent thereof; a member movably carried by said housing; means cooperating between said member and said housing for varying the area of said fluid passage in response to axial movement of said member relative to said housing whereby movement of said member will regulate the rate of flow through said check valve; punch member having a cutting head thereon, the cross-sectional configuration of the cutting head corresponding to the cross-sectional configuration of said neck portion of said housing so that when the cutting head of said punch means is driven through said flush valve to form an opening therein said check valve may be mounted therein by insertion of said neck into said opening.

Claim 11

A kit for adapting a tank-type toilet flush valve to permit closing of said valve a preselected time after said valve opens to retain a preselected quantity of water in said tank after flushing said kit comprising: a check valve assembly for venting the interior of said hollow flush valve, said check valve adapted to open responsive to movement of said flush valve out of engagement with the valve seat to vent air from the interior of said flush valve, and to close responsive to movement of said flush valve into engagement with the valve seat, said assembly including a housing defining a fluid passage and carrying a valve seat in said passage; a valve element disposed in said passage said valve element movable responsive to pressure on the upstream side greater than the pressure on the downstream side thereof, and adapted to seat in response to a pressure on the upstream side less than the pressure on the downstream side thereof, said housing also defining a neck portion depending from the lower face thereof, said neck having an inlet port therein forming a part of said fluid passage, the external surface of said neck portion having a preselected cross-sectional configuration throughout the axial extent thereof; a member movably carried by said housing; means cooperating between said member and said housing for varying the area of said fluid passage in response to axial movement of said member relative to said housing whereby movement of said member will regulate the rate of flow through said check valve; punch member having a cutting head thereon, the cross-sectional configuration of the cutting head corresponding to the cross-sectional configuration of said neck portion of said housing so that when the cutting head of said punch means is driven through said flush valve to form an opening therein said check valve may be mounted therein by insertion of said neck into said opening.