WATER RECYCLING DEVICE
A water recycling system utilizes gray water from a gray water source, such as a bathroom sink, to flush a toilet.
This application claims priority from U.S. Provisional Application Ser. No. 60/763,838, filed on Jan. 31, 2006, which is hereby incorporated herein by reference. The present invention relates to a water recycling system. More particularly, it relates to a water recycling system that uses gray water from a bathroom sink or some other household source to fill a toilet tank.
U.S. Pat. No. 6,276,005, which is hereby incorporated herein by reference, describes a water recycling system that uses gray water from a bathroom sink to fill a toilet tank. That system collects water from the sink into a reservoir, and the gray water in the reservoir is pumped to the toilet tank whenever the system senses that the toilet tank is empty, thus conserving fresh water. The toilet tank is supplemented with normal potable water when the gray water does not supply all its requirements.
SUMMARYOne embodiment of a device made in accordance with the present invention provides several improvements to the water recycling system described in the '005 patent. The improvements include incorporating a disinfecting tablet dispenser, using hollow tank bolts to make it easier to route the gray water into the toilet tank, and having an electrical control system connected to the reservoir pump to control water flow.
The system 10 collects water from the sink 12 into a gray water reservoir 16 and pumps the gray water into the toilet tank 14A, where it is used for flushing. Inside the toilet tank 14A, the control unit 20 includes a seesaw mechanism 11 (best shown in
As best shown in
Although not shown, other means for diverting water into the sewage pipe could be used. For instance, a valve could be used in place of the baffle 35A, or the pipes could be angled or otherwise configured to ensure that some water flows to the sewage pipe 33, while most of the water flows to the reservoir 16.
If the gray water reservoir 16 completely fills up with water, the water fills up to the tee 35 and overflows into the sewage pipe 33. As a result, the sewage pipe 33 is available as an alternate passageway to drain surplus gray water, preventing gray water from backing up into the sink 12.
Between the sink drainage pipe 32 and the gray water reservoir 16 is a disinfecting tablet dispenser 30. The tablet dispenser 30 is used to disinfect the gray water as it flows into the reservoir 16. The dispenser 30 has a threaded, removable cap 34, and disinfecting tablets 36 are placed inside the dispenser 30 by removing the cap 34, inserting the tablets 36, and then replacing the cap 34. The disinfecting tablets 36 in this case are tablets that are typically used in swimming pools and spas, and the tablets contain chlorine. Of course, other known sanitizing ingredients alternatively could be used.
In this case, the dispenser 30 is shown holding three disc-shaped tablets 36 stacked directly on top of each other. As water travels from the sink 12, through the dispenser 30, to the gray water reservoir 16, it washes over the tablets 36, washing some chlorine into the reservoir 16 to disinfect the gray water in the reservoir 16. The tablets 36 do not remain submerged as is normally the case for disinfecting tablets inside a toilet tank but rather remain dry until water from the sink 12 passes over them. As a result, the tablets 36 last a long time while still providing sufficient disinfectant to the reservoir 16. Three tablets typically last over a year when used for a bathroom sink under typical use by two people.
As shown in
On the inside of the toilet tank 14A, an extension 50B of the right gray water supply hose 50B is secured to the inside end 41B of the right hollow bolt 40B. The right extension 50B′ extends upwardly to an inlet port 26B (shown in
Like the ends 41, 43 of the hollow bolts 40, the tee 55 and the inlet ports 26A, 26B have barbed fittings for engaging the respective hoses. Alternatively, the hoses could be clamped in place, or threaded connections or other known types of connections could be used. In the case of the hollow bolts 40, the supply hoses alternatively could pass through the inside of the bolts. In that case, there would be a seal between the hose and the bolt to prevent leakage.
As best shown in
Although not shown, it would also be possible to replace just one of the existing regular toilet bolts with a hollow bolt, leaving the other regular toilet bolt in place. In that case, the gray water supply hose would be routed through the single hollow bolt, and it would be configured on the inside of the toilet tank 14A to supply gray water to the balance cup 23 and to the overflow pipe 60.
1. A bracket 22, which hangs on the back of the toilet tank.
2. A frame 17, which hangs from the bracket 22 and includes a top plate 19 and legs 19A, 19A′, 19A″, 19B, 19C projecting downwardly from the top plate 19. The legs 19A″ support the inlet ports 26A, 26B.
3. A seesaw mechanism 11, which pivots relative to the frame 17 about a pivot point 25 on the legs 19A, 19A′ of the frame 17 and includes a control arm 24 on one side of the pivot 25 and a fill cup 23 on the other side of the pivot 25.
4. A track bar 90, which mounts on top of the top plate 19.
The legs 19B, 19C of the frame 17 wrap around the back of the bracket 22, as shown in
In order for the fill control unit 20 to function properly, it needs to be installed correctly in the toilet tank. The elongated track bar 90 is used to facilitate proper installation of the fill control unit 20 in the toilet tank 14A.
As best shown in
The track bar 90 serves a dual purpose, functioning both as a positioning guide and as a brace. As a positioning guide, the track bar 90 serves as a measuring stick to help the installer position the bracket 22 in the correct horizontal position so that, when the control arm 24 of the fill control unit 20 pivots upwardly, it properly interacts with the toilet float 21. Once the bracket 22 is properly located, the track bar 90 is secured to the top plate 19 of the frame 17 in a position in which it is braced against the right side of the toilet tank 14A to prevent the bracket 22 from sliding horizontally as the fill control unit 20 operates.
As shown in
Now that the proper position of the fill control unit 20 is set, this position is marked or visually noted along the back of the toilet tank 14A, such as denoted by the dashed line 99 in
As shown in
Thus, the slide bar 90 functions both as a measuring stick, to properly position the fill control unit 20 horizontally in relation to the toilet float 21, and as a brace to brace the fill control unit 20 against the right side wall of the toilet tank 14A in order to prevent horizontal movement of the fill control unit 20 during operation.
The fill control unit 20 also should be adjusted vertically once it is hung inside the toilet tank 14A. More specifically, the frame 17 should be adjusted vertically relative to the bracket 22 so that the control arm 24 is under the float 21 and parallel to the water line when the balance cup 23 is in the “up” position as shown in solid lines in
The water recycling system 10 now is properly installed.
Operation of the System:The water recycling system 10 incorporates a control system that fills the toilet tank 14A with gray water when gray water is available in the gray water reservoir 16 and fills the tank 14A with fresh, potable water when gray water is not available. The control system includes a control module 73 (shown in
The snap-action switch 70 is secured to the fill control unit 20 with a screw 71, as best shown in
As shown schematically in
When the coil 84B is activated, it switches the relay 84A to complete a circuit to the pump 13, as shown in
In
When the switch 70 moves to the first (inactivated) position 76 and the first relay/timer 84 has not yet timed out, a circuit is completed through the switch 70 and through the first relay/timer 84 to the coil 86B of the second relay/timer 86 as depicted in dash-dot lines in
This causes the coil 86B of the second relay/timer 86 to activate the switch 86A on the second relay/timer 86, which completes another circuit to the pump 13, as shown in
Thus, the tank 14A is filled in two stages: an initial stage for a short period of time to fill the balance cup 23 (and rotate the seesaw mechanism 11 and the cam 72 and activate the switch 70): and a secondary stage for a longer period of time to fill the toilet tank 14A. Once the tank is filled, the system returns to the default position as shown in
As a result, the balance cup 23 remains empty, which means the switch 70 remains in the activated position 78. Now, since the switch 70 does not change positions in order to close the circuit that activates the second coil of the second relay/timer 86, the first relay/timer 84 simply times out without the second relay/timer 86 being activated. Thus, the secondary stage of filling is never started. As a result, the control system ensures that the pump 13 does not operate for an extended period of time without water in the reservoir (which could damage the pump). The pump 13 operates only during the short initial stage, but it does not run during the longer secondary stage.
Since the balance cup 23 does not fill with water, the seesaw mechanism 11 does not pivot, and the control arm 24 does not rise to lift the regular toilet float 21. With the toilet float 21 lowered, the tank 14A fills with fresh, potable water through the normal toilet fill valve 31 (according to the normal operating mechanism of the toilet) until the float 21 is raised by the incoming water. Once the tank 14A is full, the flow of fresh water is stopped by the toilet float 21 and toilet fill valve 31 in accordance with the normal operating mechanism of the toilet. As water fills the tank, it also fills the balance cup 23 through the drain hole(s) 29 until the balance cup is full causing the seesaw mechanism 11 to pivot clockwise, and raising the control arm 24 to the position shown in
The sequence of events described in the control system for the cam-action switch, including the activation of the first and second relay/timers, are the same for the system using the infrared switch. It is also possible to use other types of switches that are activated and deactivated by the movement of the flow control unit.
It will be obvious to those skilled in the art that modifications may be made to the embodiments described above without departing from the scope of the invention as claimed.
Claims
1. A water recycling device, comprising:
- a gray water reservoir disposed to receive and collect gray water from a gray water source;
- a toilet water tank including a toilet float valve controlling incoming potable water to said tank:
- a pump:
- a gray water line in communication with said pump, said gray water reservoir, and said toilet water tank, such that said pump transfers gray water from said gray water reservoir to said toilet water tank through said gray water line;
- a pivoting seesaw mechanism mounted in said toilet water tank, said seesaw mechanism including first and second arms mounted so as to pivot together about a pivot point fixed relative to said toilet water tank, wherein said first arm includes a receptacle which receives gray water from said gray water reservoir, and said second arm cooperates with said toilet float valve so that, when said first arm receptacle is filled with water, the weight of the water pivots said second arm into position to maintain said toilet float valve in a closed position: and
- a switch that activates said pump in response to the pivoting movement of said pivoting seesaw mechanism.
2. A water recycling device as recited in claim 1, and further comprising a timer control circuit that shuts off said pump after a certain time period.
3. A water recycling device as recited in claim 2, wherein said timer control circuit includes means for shutting off said pump after a short time period if said receptacle for receiving gray water is not filled during said short time period and means for allowing said pump to run for a longer time period if said receptacle is filled with gray water during said short time period.
4. A water recycling device as recited in claim 1, wherein said switch is a snap-action switch.
5. A water recycling device as recited in claim 4, and further comprising a cam on the pivot point of said seesaw mechanism that contacts said snap-action switch.
6. A water recycling device as recited in claim 1, wherein said switch is an infrared switch, including means for detecting the position of said pivoting seesaw mechanism.
7. A water recycling device as recited in claim 3, wherein said timer control circuit includes means for adjusting the length of said longer time period.
8. A water recycling device as recited in claim 1, and further comprising:
- a frame defining a left side and a right side, wherein said seesaw mechanism is pivotally attached to said frame;
- an elongated bar having a left end and a right end and slidably received by said frame for sliding in the left-to-right direction; and
- means for fixing the elongated bar to said frame to prevent said elongated bar from sliding.
9. A water recycling device as recited in claim 8, wherein said toilet tank includes a back wall, and further comprising a mounting bracket for hanging said frame on said back wall of said toilet tank, including means for adjusting the height of said seesaw mechanism within said toilet tank.
10. A water recycling device as recited in claim 1, and further comprising a toilet bowl, a hollow bolt, and a nut, wherein said hollow bolt cooperates with said nut to secure said toilet bowl and said toilet tank together and said gray water line passes through said hollow bolt.
11. A water recycling device, comprising:
- a gray water reservoir disposed to receive and collect gray water from a gray water source;
- a toilet, including a toilet water tank defining a potable water inlet;
- a toilet float valve which controls the flow of incoming potable water to said tank;
- a pump;
- a gray water line in communication with said pump, said gray water reservoir, and said toilet water tank, such that said pump transfers gray water from said gray water reservoir to said toilet water tank through said gray water line; and
- a timer control circuit electrically connecting said pump to a power supply, and including: a first timed relay that is energized in response to flushing said toilet, activating said pump for an initial time period; and a second timed relay that is energized in response to gray water being pumped into said toilet tank during said initial time period, keeping said pump activated for a secondary time period.
12. A water recycling device as recited in claim 11, wherein said secondary time interval is set to fill said toilet tank to a desired fill level.
13. A water recycling device, comprising:
- a gray water reservoir disposed to receive and collect gray water from a gray water source;
- a toilet including a bowl and a tank, said tank defining a potable water inlet;
- a first hollow bolt extending through said tank and said bowl and securing said tank and said bowl together:
- a pump; and
- a first gray water line in fluid communication with said pump, said gray water reservoir, said hollow bolt, and said tank, such that said pump transfers gray water from said gray water reservoir, through said first gray water line and said hollow bolt, and into said tank.
14. A water recycling system as recited in claim 13, wherein said tank has a bottom, said hollow bolt extends through the bottom of said tank, and said first gray water line terminates inside said tank at a height substantially above said bottom.
15. A water recycling system as recited in claim 13, and further comprising:
- a second hollow bolt extending through said tank and said bowl and securing said tank and said bowl together: and
- a second gray water line providing fluid communication from said gray water reservoir through said second hollow bolt into said tank.
16. A water recycling system as recited in claim 13, and further comprising:
- a toilet float valve for controlling the flow of water through said potable water inlet; and
- a pivoting seesaw mechanism mounted in said toilet water tank and including a first arm including a receptacle and a second arm in communication with said toilet float valve, so that, when said first arm receptacle is filled with water, the weight of the water pivots said second arm into position to maintain said toilet float valve in a closed position; wherein said first gray water line supplies gray water to said receptacle.
17. A water recycling system as recited in claim 13, wherein said gray water source is a bathroom sink, and further comprising:
- a drain line from said sink, said drain line splitting into first and second legs, said first leg going to said gray water reservoir and said second leg going to a P-trap and then on to a sewer line; and
- a diverter in said drain line, said diverter splitting the water flow from said bathroom sink drain line so that some water flows into each of said first and second legs.
18. A toilet filling system as recited in claim 17, and further comprising a tablet dispenser holding at least one sanitizing tablet, said tablet dispenser in fluid communication with said first leg of said drain line for sanitizing gray water from said sink prior to entering said gray water reservoir.
19. A method of installing a water saver unit in a toilet tank, comprising the steps of:
- providing a standard toilet tank including left, right, front and rear walls and containing a toilet float valve;
- hanging a water saver unit on the back wall of said toilet tank, said water saver unit including a frame and an elongated bar slidably received by said frame for sliding in the left-to-right direction;
- moving said water saver unit along the back wall of said toilet tank until the left end of said elongated bar is aligned with the toilet float valve; then
- sliding the elongated bar to the right relative to said frame until the right end of said elongated bar abuts the right wall of said toilet tank; and then
- fixing the position of said elongated bar relative to said frame.
20. A method of installing a water saver unit in a toilet tank as recited in claim 19, and further comprising the step of adjusting the vertical position of said water saver unit in said tank.
Type: Application
Filed: Jan 26, 2007
Publication Date: Aug 2, 2007
Inventors: Mark Golightly Sanders (Louisville, KY), Thomas F. Reynolds (Louisville, KY), Gerald Cox (Shepherdsville, KY), Wayne Streble (Louisville, KY)
Application Number: 11/627,420
International Classification: E03C 1/01 (20060101); A47K 4/00 (20060101);