WO2012154181A1

WO2012154181A1 - Dual valve method and apparatus for limiting toilet water flow

Info

Publication number: WO2012154181A1
Application number: PCT/US2011/036183
Authority: WO
Inventors: Rodger L. ROSS; Donna ROSS
Original assignee: Ross Rodger L; Ross Donna
Priority date: 2011-05-12
Filing date: 2011-05-12
Publication date: 2012-11-15

Abstract

A dual valve assembly for limiting flow into a toilet tank comprises a fill valve, such as a float valve or ball cock valve, and a piston valve positioned between a water supply line and the fill valve. The piston valve operates independently of the fill valve, and is designed to shut off water flow after an approximate flow volume or time. The dual valve assembly may be provided in a single housing replacement part. The dual valve assembly may be provided as an adapter kit comprising a housing and piston valve which is installed in a toilet tank to accept a fill valve.

Description

Dual valve method and apparatus for limiting toilet water flow

By

Rodger L. Ross and Donna Ross BACKGROUND- FIELD OF INVENTION

The current invention relates to a method and apparatus for a toilet flow control device, and more particularly to providing a piston valve device in combination with a toilet fill valve in order to save water in the event of flapper or fill valve malfunction.

BACKGROUND- PRIOR ART

Leaking toilets are a very large source of wasted water. Many homeowners and rental property owners have not discovered leakage until they investigate the reason for an unusually high water bill. Smaller leaks may go undetected for months or years. There is a need for a simple, reliable, and economical device for reducing or eliminating leakage in toilets.

Running or leaking toilets can be caused by several factors including (a) a stuck flapper valve; (b) a malfunctioning fill valve, and (c) an improperly adjusted fill valve or float causing water to rise above the overflow tube. The present invention prevents a waste of water under any of those conditions. By contrast, prior art devices typically address only some of these factors.

Piston valve devices

In one embodiment of the current invention, a manually resetting shutoff piston valve is provided that is preset to stop water flow after an approximate period of time, such as three minutes. In this specification and claims, the term "piston valve" or "push valve" refers to a valve where a piston moves from an open mode to a closed mode in order to open or close the valve. The piston is typically opened by a manual force, and typically closes more slowly than it is opened. Piston valves are used in the faucets of many public restrooms. By contrast, a "turbine meter" uses a combination of an impeller or turbine with gears as a valve-closing mechanism.

In one embodiment of the current invention, when the flush lever of the toilet is pushed, a pivoting lever drives a piston to an open position, so that the piston valve permits an approximate total flow volume before it closes and prevents further flow until the next flush event.

U.S. Patent No. 4,659,059 to Morris et al. describes one example of a piston valve which comprises an improved, delayed closing plumbing valve of the type having a cartridge with hydraulic fluid in a sealed chamber retained between an upper and lower diaphragm positioned about a longitudinally movable valve stem assembly. The chamber has a oneway piston which divides the chamber into an upper and lower section, and there is a restricted fluid flow path between the two sections. A water shut off gasket is at the base of a valve stem and has a removable gasket ring to permit the replacement of the gasket. The valve seat may also be removable for replacement. The lower diaphragm is provided with a sealed chamber to prevent its degradation by particles in the water. The

diaphragms at the upper and lower end of the chamber are retained and sealed to the valve stem by retaining rings having a conical upper end which holds the inner part of the diaphragm against the valve stem. The diaphragms preferably permit the turning of the valve stem with respect to the cartridge without damage to the diaphragms.

U. S. Patent No. 3,842,857 to McCornack describes a piston valve device for a toilet.

Several subsequent piston valve device patents reference the McCornack patent.

Volume turbine meter valve in tank U.S. Patent No. 5,125,120 to Baron describes a toilet water regulator device which prohibits water flow into the toilet system after a predetermined amount of water has entered the system comprising a valve at the water inlet to the system, said valve having a water outlet to the system, wherein the flow of water through said valve is controlled by turbine means associated with the water outlet of the valve and the amount of water predetermined necessary to fill the tank is controlled by adjustable valve means.

U.S. Patent No. 7,210,498 to Arigoni describes a turbine valve used in combination with a float valve. In one embodiment of the present invention, a piston valve device with a self-cleaning capability is provided to reduce risks of fouling present with turbine meter devices. In one embodiment of the present invention an adapter device is provided so that float valve or piston valve components may be replaced without removing a housing from the toilet tank. In one embodiment of the present invention a low profile manifold housing is provided to permit use of a relatively tall float valve assembly.

Monitoring or meter valve for house

U.S. Patent No. 6,237,618 to Kushner describes a system which includes a flow meter that connects to the water supply line, wherein the flow meter produces a water flow signal indicative of the volume of water flowing through the water supply line. A systems controller is provided that is connected to both the valve and the flow meter. The systems controller is configurable between a first operations mode and a second operations mode. The systems controller reads the water flow signal from the flow meter and closes the valve at a first flow rate when it is in its first operations mode. Similarly, the systems controller closes the valve at a second flow rate when it is in its second operations mode. When the flow meter detects an excessive volume flow, the systems controller only closes the valve if the excessive flow persists beyond a predetermined period of time. The predetermined period of time has a duration of at least ten seconds.

Time meter U.S. Patent number 7,293,583 to Lee describes a "Countdown timer" automatic water limiting supply shut off safety valve flo-control system.

US Patent Publication No. 2006-0254651 by McCalister describes fluid sensing shut-off devices with timer and methods of operation.

There is a need for a simple and reliable mechanical device which prevents water waste in the event of flapper malfunction, flapper leakage, fill valve mis-adjustment, and fill valve leakage. The current invention addresses that need.

SUMMARY OF INVENTION

In one embodiment of the current invention, a dual valve assembly is provided for limiting flow into a toilet tank. The dual valve assembly comprises a housing which includes a portion that extends through a toilet tank supply hole and is connected to a water supply line; a fill valve, such as a float valve or ball cock valve; and a piston valve positioned between a water supply line and the fill valve. The piston valve operates independently of the fill valve, and is designed to shut off water flow after an

approximate flow volume or time. In another embodiment, the fill valve is positioned between the water supply line and the piston valve.

In one embodiment, a low profile manifold housing is provided to orient the piston valve adjacent to the float valve, rather than stacking the valves vertically.

In one embodiment, the dual valve assembly is provided in a single housing replacement part.

In another embodiment, the dual valve assembly is provided as an adapter kit comprising a housing and piston valve which is installed in a toilet tank. After the adapter kit is installed, a fill valve such as a float valve is attached to the housing. The fill valve may be a standard size valve, or may be adapted for use with the adapter kit- such as a short float valve.

DESCRIPTION OF FIGURES

FIG. 1 shows a portion of a toilet tank with an exploded dual valve assembly of one

embodiment of the current invention.

FIG. 2 is a perspective view of an assembled device of FIG. 1.

FIG. 3 is an exploded diagram of one example of a manifold and piston valve of the

embodiment of FIG. 1

FIG. 4 is a perspective exploded view of a toilet tank with a ball cock valve embodiment of the device of the present invention.

FIG. 5 is a perspective view of an assembled device of FIG. 4.

FIG. 6 is a side perspective view of a partially assembled device of a second embodiment of the current invention.

FIG. 7 is a side perspective view of a piston valve actuating arm assembly of the device of FIG. 6.

FIG. 8 is a top perspective view of a bottom portion of a manifold housing of the device of FIG. 6.

FIG. 9 is a bottom perspective view of a top portion of a manifold housing of the device of FIG. 6.

FIG. 10 is a top perspective view of a cap for the piston valve support portion of the

device of FIG. 6.

FIG. 11 is a bottom perspective view of a piston valve actuation arm of the device of FIG.

6.

FIG. 12 is a top perspective view of a actuation arm support of the device of FIG. 6. Element List

The following element numbers are used in the specification and figures,

toilet tank 50 water supply inlet hole 52

water supply line 54

toilet handle 60

dual valve assembly 100

manifold housing 120

base portion of the manifold housing 121 top portion of the manifold housing 123 lower manifold portion 122

fill valve support portion 124

piston valve housing 128 portion of the manifold top 126 of the piston valve housing first O-ring 130

piston valve 140

piston valve actuator 142

second O-ring 150

cap 160, 180

actuating arm support 162

dowel pin 163

screws 165

piston valve actuating arm 170

first end portion 173

piston valve actuating arm pivot point 174 second end portion 176

actuating arm assembly 190

float valve 200

flapper arm 210

distal end 211

proximal end 213

flapper chain support hole 212 piston valve actuating arm chain support hole 214

piston valve actuating arm chain 220

flapper chain 230

ball cock valve 270 ball float 272

DESCRIPTION OF EMBODIMENT - DUAL FLOAT VALVE AND PISTON VALVE ASSEMBLY

FIG. 1 shows a portion of a toilet tank 50 with an exploded dual valve assembly 100 of one embodiment of the current invention. FIG. 2 is a perspective view of an assembled device of FIG. 1.

Manifold

In this embodiment, a water supply line is provided at the tank near the water supply inlet hole 52. In prior art devices, a lower portion of a float valve typically protrudes through this water supply inlet hole so that a water supply line can be attached to the float valve. A float valve is one example of a fill valve. In this embodiment, a manifold 120 includes a lower manifold portion 122 and a fill valve support portion 124. The lower portion is partially inserted through the water supply inlet hole 52 and secured to the tank.

Typically, the lower portion is threaded, and a locking nut (not shown) is installed on the threaded portion and then tightened against the tank bottom. A washer (not shown) is typically provided to seal between the manifold and the tank. The manifold may be made of plastic or any other suitable material.

Piston valve

In this embodiment, a prefabricated piston valve 140 is provided in a piston valve housing 128 portion of the manifold. One example of a piston valve is provided by Moen , such as Model No.16352, which provide "volume metering valves" which meter the volume of water flow through the meter when the valve is opened, and then close after a designated volume of water has flowed through the valve. Another example of a piston valve is described by U.S. Patent No. 4,093,177, which is incorporated into this specification by reference. The piston valve includes backflow prevention features.

In this embodiment, a first O-ring 130 is provided between the lower portion of the piston valve and a valve seat (not shown) provided in the manifold. A second O-ring 150 is provided between the upper portion of the piston valve and a valve seat (not shown) provided in the manifold. A cap 160 is provided to fit over the top 126 of the piston valve housing. A piston valve actuator 142 is provided on the upper portion of the piston valve 140. In this embodiment, when the piston valve actuator 142 is depressed, the piston valve is opened for a preset approximate time or flow volume.

A piston valve actuating arm 170 is supported in proximity to the cap 160, so that when a first end portion 173 of the piston valve actuating arm 170 is raised, the arm pivots at piston valve actuating arm pivot point 174, thereby causing the second end portion 176 of the piston valve actuating arm to depress the piston valve actuator 142.

In this embodiment, a portion of the piston valve is positioned in the manifold such that a portion of the valve is located below the bottom of the tank. This positioning reduces the displacement volume and height of the housing in the tank. In this example, the piston valve discharges the fill valve support portion 124 oriented to the side of the piston valve. This orientation provides an advantage of permitting a relatively tall float valve, thereby reducing adaptations required, if any, for float valves to be used in combination with the piston valve. The orientation also permits a direct access to the piston valve actuator 142, so that the actuation mechanism may be simplified. Tank level control valve

Prior art devices include various types of tank level control fill valves for a toilet tank. These fill valve devices include float valves which open when a float element is lowered and close when the float element is raised; pressure sensing elements for detecting the pressure of water above the pressure sensing element, timer elements which close after a set duration of flow, and flow elements which close after a set flow of water through the element. The most common type of tank level control fill valve is a float valve. In addition to the basic function of closing a valve when a float element reaches a set level in the tank, some float valves have features such as preventing the float to drop until the toilet is flushed. This type of feature is intended to keep the float valve closed when water leaks past a flapper valve. In this patent specification and claims, the terms "tank level control fill valve" or "fill valve" includes float valves and pressure sensing valves. The term "tank level control fill valve" or "fill valve" also refer to metering valves which are designed to serve as the primary level control for a tank. For instance, one embodiment of the current invention is to provide a dual valve device where a first valve serves the primary function of stopping water flow at the approximate time that a tank fills with water, and a second metering valve which serves a backup function of preventing additional flow beyond a set volume or time. In this example, the first valve may also be a metering valve.

In this example, the tank level control fill valve is a float valve 200 which is supported by the fill valve support portion 124 of the manifold. In this embodiment, the float valve operates in a conventional manner by opening when the toilet handle 60 is engaged, and by remaining open until a designated height of water in the tank has been achieved. The toilet handle or lever is part of a tank flush mechanism. A flapper arm 210 is connected to the toilet handle 60 at proximal end 213 of the flapper arm, so that when the toilet handle is depressed, distal end 211 of the flapper arm 210 is raised, thereby raising flapper chain support hole 212 which typically holds a flapper chain 230 connected to a flapper valve (not shown). In this embodiment, piston valve actuating arm chain support hole 214 is also raised thereby pulling a piston valve actuating arm chain 220 and thereby lifting meter hole 172 and piston valve actuating arm 170.

FIG. 3 is an exploded diagram of one example of the manifold 120 of FIG. 1. In this example, the manifold is manufactured by the assembly of separate pieces including a lower portion 122, a fill valve support portion 124, a piston valve housing section 128, a piston valve 140, O-rings 130 and 150, and a cap section 160.

Operation

In this embodiment, a piston valve serves as a shutoff valve on the supply side of the fill valve. The piston valve operates independently of the fill valve to prevent a continued waste of water in various failure modes as described below. In other embodiments, the piston valve serves as a shutoff valve on the discharge side of the fill valve.

In this embodiment, the piston valve is manually reset when the toilet handle is engaged such as by depressing a flush lever. In this embodiment, when the flush lever 60 is depressed, the distal end 211 of the flapper arm 210 is raised. As the distal end 211 is raised, flapper chain 230 is pulled upward, thereby raising the flapper. Also, as the distal end 211 is raised, flapper chain 230 is pulled upward, piston valve actuating arm chain 220 is pulled upward, thereby raising end 173 and lowering end 176 of piston valve actuating arm 170. As end 176 of piston valve actuating arm 170 is lowered, piston valve actuator 142 is depressed and resets the piston valve.

In one example, the piston valve cuts off after approximately 3 minutes. This time setting, or corresponding flow, may be different in other examples. It is generally desirable to set this the closing time or volume such that the piston valve cutoff occurs after the fill valve closes. When the toilet is flushed, the following steps are performed

The piston valve is opened for a fixed flow volume or fixed duration;

The fill valve is opened;

If the flapper closes properly, and if the fill valve is adjusted properly and operating properly, then the fill valve will close when the tank is filled;

independently of the fill valve operation, the piston valve will close.

The piston valve is reset during the next flush event, such as when the second end portion 176 of the piston valve actuating arm depresses the piston valve actuator 142 as described above.

In the event that the flapper valve does not properly close, the fill valve may not close, but the piston valve will close and will avoid the continued waste of water.

In the event that the flapper valve closes, but leaks, the fill valve may close. If the fill valve does not have a float locking feature, then the float or other sensing element may cause the fill valve to reopen. However, the piston valve will prevent additional water from entering the tank until the tank is flushed again. This case is the same for other leaks from the tank.

In the event that the fill valve closes and leaks, the piston valve will close and will avoid the continued waste of water.

In the event that the fill valve is improperly adjusted, some water may overflow into an overflow tube, the piston valve will close and will avoid the continued waste of water.

DESCRIPTION OF EMBODIMENT - PISTON VALVE ASSEMBLY

FIGs. 6-12 show an embodiment of a housing and piston valve assembly. FIG. 6 is a side perspective view of a partially assembled device of a second embodiment of the current invention showing a manifold housing 120 having a base portion 121 and a top portion 123; a piston valve 140; and an actuating arm assembly. The actuating arm assembly, which is shown in FIG. 7, comprises piston valve actuating arm 170; an actuating arm support 162 with a dowel pin 163 and screws 165; and a cap 180.

FIG. 8 is a top perspective view of a bottom portion 121 of a manifold housing of the device of FIG. 6, and FIG. 9 is a bottom perspective view of a top portion 123 of a manifold housing of the device of FIG. 6. In this example, the top and bottom portions of the housing may be fabricated separately and the be welded, glued, or otherwise assembled.

FIG. 10 is a top perspective view of a cap 180 for the piston valve support portion of the device of FIG. 6. In this example, the cap is threaded onto the housing, and has a plurality of retention features for retaining the actuation arm support as the support is rotated to a desired position to avoid interference between the piston valve actuation arm and the fill valve.

FIG. 11 is a bottom perspective view of a piston valve actuation arm 170 of the device of FIG. 6. In this example, the arm includes a hole 172 in the first end to permit attachment of a chain between the arm and the tank flush lever. A second hole 174 is provided near the first end of the arm to permit insertion of a dowel pin that serves as a pivot rod for the arm.

FIG. 12 is a top perspective view of a actuation arm support 162 of the device of FIG. 6.

DESCRIPTION OF EMBODIMENT - DUAL BALL COCK AND PISTON VALVE ASSEMBLY In this embodiment, the fill valve is a ball cock valve rather than a float valve as described above.

FIG. 4 is a perspective exploded view of a toilet tank with a ball cock valve embodiment of the device of the present invention. FIG. 5 is a perspective view of an assembled device of FIG. 4.

In this embodiment, a housing includes a fill valve support portion 124 supports a ball cock valve 270 which is controlled by a ball float 272.

In this embodiment, a water supply line 54 is provided at the tank near the water supply inlet hole 52 and is attached to a lower manifold portion 122. A piston valve 140 is provided in a piston valve housing 128 portion of the manifold. The piston valve may be actuated by a piston valve actuating arm 170 as described above.

DESCRIPTION OF EMBODIMENT - SINGLE PART DUAL VALVE DEVICE

In this embodiment, a single housing is provided. The housing may be manufactured from multiple parts, but is typically installed by the user as a single device.

In one example, the housing includes a lower manifold portion 122 which extends through a water supply inlet hole 52 and is attached to a water supply line 54 as described above. A fill valve is pre-attached to the housing or provided in an extended fill valve support portion 124. A piston valve is provided in the housing between the fill valve and the water supply line.

DESCRIPTION OF EMBODIMENT - SINGLE PART DUAL VALVE DEVICE WITH REPLACEABLE FILL VALVE In this embodiment, a single housing is provided is provided as described above, but the fill valve is removably attached to the housing such that a replacement fill valve may be installed without removing the housing from the tank.

For example, the fill valve may be a short fill valve that has a threaded end for attachment to the housing. In this example, the old fill valve may be unthreaded and replaced with a new fill valve.

DESCRIPTION OF EMBODIMENT - ADAPTER KIT

In this embodiment, an adapter kit is provided for installation in the tank and for accepting a separate fill valve such as a float valve. The housing includes a lower manifold portion 122 which extends through a water supply inlet hole 52 and is attached to a water supply line 54 as described above. A fill valve attachment point, such as a female threaded joint is provided on the housing to accept a fill valve such as a float valve. A piston valve is provided in the housing between the fill valve and the water supply line.

DESCRIPTION OF EMBODIMENT -REPLACEABLE PISTON VALVE

In this embodiment, a single housing or adapter kit is provided as described above, and the piston valve is replaceable.

In one example, the piston valve may be replaced by removing the piston valve cap or cover element, replacing the piston valve, and replacing the cover. While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

CLAIMS What is claimed is

1. A dual valve assembly for a toilet, the toilet having a tank and a water fill supply line, the dual valve assembly comprising a housing comprising an inlet section, such that the water fill supply line is attachable to the inlet section, a piston valve support section, and a fill valve support section oriented to the side of the piston valve support section ; a fill valve, such that the fill valve is supported by the housing fill valve support section; and a piston valve, such that the piston valve is supported in the housing piston valve support section.

2. The dual valve assembly of claim 1 further comprising a piston valve actuation arm comprising a pivotal mount supported by the housing, a first end connected to a tank flush lever, and a second end in proximity to a piston valve actuation element, such that when the tank flush lever is depressed, the first end of the piston valve actuation arm is raised, thereby causing the second end to engage the piston valve actuation element.

3. The dual valve assembly of claim 2 further comprising a piston valve actuation arm assembly comprising a cap attached to the piston valve support section of the housing, the cap comprising an open top to expose the upper portion of the piston valve; an actuating arm support; and the piston valve actuation arm.

. The dual valve assembly of claim 3 wherein the cap is threaded; the cap comprises snap retaining features to hold the actuating arm support and to permit the actuating arm support to be rotated to a desired position with respect to the cap; and at least one set screw secures the actuating arm support to the cap in a desired orientation.

5. The dual valve assembly of claim 3 wherein the actuating arm support comprises two spaced apart elevated portions; and a dowel pin is inserted between the elevated portions and through a portion of the piston valve actuation arm to permit the piston valve actuation arm to pivot with respect to the actuating arm support.

6. The dual valve assembly of claim 1 wherein the piston valve is positioned between the water fill supply line and the fill valve.

7. The dual valve assembly of claim 1 wherein the piston valve meters cumulative flow or duration of flow after the toilet is flushed.

8. The dual valve assembly of claim 1 wherein the fill valve is a float valve.

9. The dual valve assembly of claim 1 wherein the fill valve is a ball cock valve.

10. The dual valve assembly of claim 6 further comprising a chain adjustably connecting the first end of the piston valve actuation arm to the tank flush lever.

11. A method for controlling the flow of water into a toilet tank, the method comprising providing a dual valve assembly comprising a housing comprising an inlet section, such that a water fill supply line is attachable to the inlet section, a piston valve support section, and a fill valve support section oriented to the side of the piston valve support section ; a piston valve, such that the piston valve is supported in the housing piston valve support section, the piston valve comprising an inlet, and an outlet; and a fill valve connected to the outlet of the piston valve, the fill valve supported by the housing fill valve support section; a fill valve connected to the outlet of the piston valve; attaching the inlet of the piston valve to a water fill supply line; resetting the piston valve when a tank flush mechanism is engaged; permitting water to flow through the piston valve and the fill valve; and closing the piston valve when an approximate flow volume is achieved.

12. The method of claim 11 wherein resetting the piston valve when a tank flush lever is depressed further comprises providing a piston valve actuation arm comprising a cap attached to the piston valve support section of the housing, the cap comprising an open top to expose the upper portion of the piston valve, an actuating arm support comprising a a pivotal mount, and a piston valve actuation arm comprising a first end connected to the flush lever, and a second end in proximity to a piston valve actuation element, such that when the flush lever is depressed, the first end of the piston valve actuation arm is raised, thereby causing the second end to engage the piston valve actuation element and to reset the piston valve.

13. The method of claim 11 further comprising providing an adapter kit comprising the housing; placing the adapter kit in the toilet tank; rotating the actuating arm support and piston valve actuation arm to a desired position; and attaching a fill valve to the fill valve support section.