Drain cleaning and maintenance system and method

Abstract

A drain cleaning and maintenance system including a drain trap having a first inlet in fluid communication with a plumbing fixture drain, a second inlet in fluid communication with the drain trap, and a cleaning and maintenance assembly. The assembly includes a maintenance assembly inlet in fluid communication with a pressurized liquid source and a maintenance assembly outlet in fluid communication with the second inlet. The electronic valve has an open state that allows liquid flow from the maintenance assembly inlet to the maintenance assembly outlet and a closed state that blocks liquid flow from the maintenance assembly inlet to the maintenance assembly outlet. An electronic controller is adapted to transition the electronic valve between the open and closed states to allow liquid flow from the source to the drain trap via the second inlet.

Description

[Technical field]

[0001] The present invention relates generally to drain systems, and more particularly to systems and methods for maintaining and cleaning drain systems from debris, biofilm formation, and / or bacterial or fungal growth within the drain systems.

[0002] In normal plumbing, a drain trap, also known as a siphon, is placed under or inside a plumbing fixture and is shaped and configured to prevent sewer gases from entering a building. Typically, a drain trap is formed as a U-shaped bend in the drain pipe. Due to its shape, a typical drain trap will always hold a small amount of liquid inside it, especially after use of the plumbing fixture. The trapped liquid seals off the rest of the drain pipe that leads to the sewer, thereby preventing sewer gases from re-entering the environment by backflowing through the drain pipe. Essentially, all plumbing fixtures, including sinks, bathtubs, and toilets, are equipped with either an internal or external trap.

[0003] PRIOR ART Figures 1A and 1B show an example of a conventional drain pipe connector 100 that connects a drain inlet 102 located in a plumbing fixture 103, such as a sink or bathtub, to a drain pipe 104 that leads to a sewer system. The drain pipe connector 100 includes a first connector ring 105 that connects the drain inlet 102 to a U-shaped drain trap 106, and a second connector ring 108 that connects the trap 108 to the drain pipe 104.

[0004] Because drain traps are localized low points in the plumbing, heavy objects such as jewelry inadvertently dropped into fixture 103, as well as hair, sand, and other debris, tend to collect in drain traps such as trap 106. This limits the size of objects that can pass through the trap and into pipe 104. For that reason, typical drain traps are designed to be disassembled or have a separate cleaning mechanism to remove objects captured within the trap.

[0005] In addition to trapping debris and objects that inadvertently enter the plumbing, drain traps and drain pipe connectors also promote the formation of biofilm and the accumulation of bacteria. This is partly a result of the use of unsterile tap water and the fact that the sink is used to wash dirty objects, for example, when washing hands after using the toilet or washing dirty dishes. Such formation of bacteria or biofilm is shown in Figures 1A and 1B as a layer 110 located at the bottom end where the trap 106 is bent.

[0006] 1A, bacteria from the trap 106 may "rise" up the drain pipe, for example, by the outflow of air from the drain trap through the drain inlet 102, as indicated by arrow 120. Such backflow of bacteria may contaminate fixtures 103 that are drained from the drain inlet 102, and may also contaminate the air or open space of the room in which the plumbing fixture 103 is located.

[0007] The problem of bacterial backflow is further exacerbated by the fact that water draining from the fitting through drain inlet 102 into trap 106 impinges on biofilm 110 that has formed within trap 106, as shown by arrow 130 in Figure 1B. Water impinging on the biofilm releases contaminated aerosols from biofilm 110 into the air within trap 106, facilitating the backflow of such aerosols from trap 106 through drain inlet 102 into fitting 103 and the room in which fitting 103 is located, as shown by arrow 122 in Figure 1B.

[0008] Various mechanisms for removing bacteria or soil from drain traps have been proposed in the prior art. According to some methods, clean water, which may contain germicidal, antibacterial, or antifungal substances, is flowed into the trap through a drain inlet (e.g., 102 in FIG. 1A) to remove at least a portion of the bacterial growth or soil. However, the water flowing from the drain inlet has a relatively low water pressure and is directed such that the germicidal water does not directly impinge on the bacterial growth or soil and break them down. Furthermore, the flow of germicidal water or liquid is insufficient to replace all the liquid in the trap, leaving stagnant liquid in the trap that may encourage new or further bacterial growth.

[0009] Prior Art FIG. 1C shows another exemplary proposed solution, where water from a drain hose 150 of a water-based appliance, such as a dishwasher 152, is pumped into a drain pipe 154 upstream of the drain trap 106. In some cases, the appliance may have a second drain hose 156 connected directly to the sewer. In this arrangement, liquid from the appliance reaches the drain trap and, in theory, could flush or remove dirt or bacterial growth from the drain trap. However, this again results in the problems mentioned above, where the pressure of the liquid from the appliance is low, resulting in the liquid hitting the dirt layers directly and not breaking them down, and may be insufficient to replace all the liquid in the trap.

[0010] Therefore, there is a need in the art for a system for draining plumbing fixtures that prevents the formation of dirt layers or bacterial growth on the drain traps of plumbing fixtures and that can remove or clean any already formed dirt layers or bacterial growth. Summary of the Invention

[0011] According to one embodiment of the present invention, a drain cleaning and maintenance system is provided, comprising a first inlet in fluid communication with a plumbing fixture drain, a drain trap having a second inlet in fluid communication with the drain trap, and a cleaning and maintenance assembly disposed on an inlet line leading to the second inlet. The cleaning and maintenance assembly includes a maintenance assembly inlet adapted to be in fluid communication with a pressurized liquid source, a maintenance assembly outlet in fluid communication with the second inlet, and a pipe disposed between the maintenance assembly inlet and the maintenance assembly outlet. The electronic valve has an open state that allows liquid to flow through the pipe from the maintenance assembly inlet to the maintenance assembly outlet, and a closed state that blocks liquid from flowing from the maintenance assembly inlet to the maintenance assembly outlet. The electronic controller is adapted to transition the electronic valve between the open state and the closed state, and when the maintenance assembly inlet is connected to the pressurized liquid source and the electronic valve is in the open state, liquid flows from the source to the drain trap via the second inlet.

[0012] According to another embodiment of the present invention, a drain device is provided that includes a drain trap having a first inlet and a second inlet adapted to be in fluid communication with a drain of a plumbing fixture, and a cleaning and maintenance assembly integral with the drain trap. The cleaning and maintenance assembly includes a maintenance assembly inlet adapted to be in fluid communication with a pressurized liquid source, a maintenance assembly outlet in fluid communication with the second inlet, and a pipe disposed between the maintenance assembly inlet and the maintenance assembly outlet. The electronic valve has an open state that allows liquid to flow through the pipe from the maintenance assembly inlet to the maintenance assembly outlet, and a closed state that blocks liquid from flowing from the maintenance assembly inlet to the maintenance assembly outlet. The electronic controller is adapted to transition the electronic valve between the open state and the closed state, and the power source is adapted to provide power to the electronic valve and the electronic controller, and when the maintenance assembly inlet is in fluid communication with the pressurized fluid source and the electronic valve is in the open state, liquid flows from the source through the second inlet to the drain trap to clean the drain trap.

[0013] According to another embodiment of the present invention, a method for cleaning and maintaining a drain trap of a drain having a first inlet is provided. The method includes providing a cleaning and maintenance assembly including a maintenance assembly inlet, a maintenance assembly outlet, a pipe disposed between the maintenance assembly inlet and the maintenance assembly outlet, an electronic valve having an open state in which liquid flows through the pipe from the maintenance assembly inlet to the maintenance assembly outlet and a closed state in which liquid is blocked from flowing from the maintenance assembly inlet to the maintenance assembly outlet, and an electronic controller adapted to transition the electronic valve between the open state and the closed state. The method further includes connecting the maintenance assembly outlet of the cleaning and maintenance assembly to a second inlet in fluid communication with the drain trap, and connecting the maintenance assembly inlet of the maintenance assembly to a pressurized liquid source while the electronic valve is in the closed state. The method also includes transitioning the electronic valve from the closed state to the open state using the electronic controller, thereby allowing liquid from the source to flow through the pipe and the second inlet into the drain trap and impinge on an inner wall of the drain trap to clean the walls of the drain trap.

[0014] The foregoing discussion will be more readily understood from the following detailed description of the present invention taken in conjunction with the accompanying drawings (FIGS. 1-12). [Brief description of the drawings]

[0015] [Figure 1A] FIG. 1 is a schematic diagram of a prior art drain pipe connector including a drain trap. [Figure 1B] FIG. 1 is a schematic diagram of a prior art drain pipe connector including a drain trap. [Figure 1C] FIG. 1 (PRIOR ART) is a schematic diagram of a prior art drain pipe connector including a drain trap. [Figure 2A] 1 is a schematic diagram of a drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 2B]1 is a schematic diagram of a drain cleaning and maintenance system according to an embodiment of the present invention. [Diagram 3] 2 is a schematic diagram of another drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 4] 1 is a schematic diagram of an integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Diagram 5] 2 is a schematic diagram of another integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 6A] FIG. 2 is an exploded perspective view of another integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 6B] FIG. 2 is an assembled perspective view of another integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 6C] FIG. 2 is a partially assembled perspective view of another integrated drain cleaning and maintenance system in accordance with an embodiment of the present invention. [Figure 6D] FIG. 2 is a side plan view of another integrated drain cleaning and maintenance system in accordance with an embodiment of the present invention. [Figure 6E] FIG. 2 is a front plan view of another integrated drain cleaning and maintenance system in accordance with an embodiment of the present invention. [Figure 6F] 1 is a cross-sectional view of another integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 6G] 1 is a cross-sectional view of another integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 6H] FIG. 6C is a side view of the integrated drain cleaning and maintenance system of FIGS. 6A-6G, including a one-way valve at the drain outlet leading to the system. [Figure 6I] FIG. 7 is a cross-sectional view of the integrated drain cleaning and maintenance system of FIGS. 6A-6G, including a one-way valve at the drain outlet leading to the system. [Figure 7A]FIG. 2 is an exploded perspective view of another integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 7B] FIG. 2 is a partially assembled perspective view of another integrated drain cleaning and maintenance system in accordance with an embodiment of the present invention. [Figure 7C] FIG. 2 is a partially assembled perspective view of another integrated drain cleaning and maintenance system in accordance with an embodiment of the present invention. [Figure 7D] FIG. 2 is an assembled perspective view of another integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 7E] FIG. 2 is a side plan view of another integrated drain cleaning and maintenance system in accordance with an embodiment of the present invention. [Figure 7F] 1 is a cross-sectional view of another integrated drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 8] 2 is a schematic diagram of yet another drain cleaning and maintenance system in accordance with an embodiment of the present invention. [Figure 9] 2 is a schematic diagram of another drain cleaning and maintenance system according to an embodiment of the present invention. [Figure 10A] FIG. 10 is a front plan view of a nozzle for connecting the drain cleaning and maintenance assembly of any one of FIGS. 2A to 9 to a drain assembly. [Figure 10B] FIG. 10 is a cross-sectional view of a nozzle for connecting the drain cleaning and maintenance assembly of any one of FIGS. 2A to 9 to a drain assembly. [Figure 10C] FIG. 10 is a cross-sectional view of a nozzle for connecting the drain cleaning and maintenance assembly of any one of FIGS. 2A to 9 to a drain assembly. [Figure 10D] FIG. 10 is a cross-sectional view of a nozzle for connecting the drain cleaning and maintenance assembly of any one of FIGS. 2A to 9 to a drain assembly. [Figure 11A]10 is a schematic cross-sectional view of another nozzle for connecting the drain cleaning and maintenance assembly of any one of FIGS. 2A to 9 to a drain assembly in a static and a flowing state. FIG. [Figure 11B] 10 is a schematic cross-sectional view of another nozzle for connecting the drain cleaning and maintenance assembly of any one of FIGS. 2A to 9 to a drain assembly in a static and a flowing state. FIG. [Figure 12A] 10A-11B are schematic diagrams of an embodiment of connecting any of the cleaning and maintenance assemblies of FIGS. 2A-9 to a drain assembly using a different nozzle, as in FIGS. 10A-11B, in accordance with an embodiment of the present invention. [Figure 12B] 10A-11B are schematic diagrams of an embodiment of connecting any of the cleaning and maintenance assemblies of FIGS. 2A-9 to a drain assembly using a different nozzle, as in FIGS. 10A-11B, in accordance with an embodiment of the present invention. [Figure 12C] 10A-11B are schematic diagrams of an embodiment of connecting any of the cleaning and maintenance assemblies of FIGS. 2A-9 to a drain assembly using a different nozzle, as in FIGS. 10A-11B, in accordance with an embodiment of the present invention. [Figure 13] 10 is a schematic flow chart of a method of installing the cleaning and maintenance system of any of FIGS. 2A-9, in accordance with an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The principles of the present system and method for drain system maintenance and cleaning may be better understood with reference to the drawings and accompanying description. Before describing at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments or of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.

[0017] In the context of this application and the claims, the term "downstream" refers to the pipe or element that the liquid reaches after passing through the drain. Thus, if water being drained through a piping system reaches pipe segment A after passing through pipe segment B, then pipe segment A is downstream of pipe segment B.

[0018] In the context of this application and the claims, the term "upstream" refers to a pipe or element that a liquid reaches before passing through a drain. Thus, if water being drained through a piping system reaches pipe segment A before passing through pipe segment B, then pipe segment A is upstream of pipe segment B.

[0019] In the context of this application and the claims, the term "drain trap" relates to any device that connects a drain to a sewer pipe and holds liquid therein. The term "drain trap" includes, for example, U-traps, P-traps, Q-traps, S-traps, gully traps, floor or nani-traps, bottle traps, siphons, and intercepting traps.

[0020] In the context of the present application and the claims, the term "pressurized liquid" relates to a liquid having a pressure of at least 2 bar.

[0021] In some embodiments, the present invention provides a solution to the build-up of dirt layers and / or bacterial or fungal growth in drain traps or siphons.

[0022] In some embodiments, the invention includes an electronically controlled valve that controls the flow of water or another liquid from a high pressure source directly to the drain pipe connector or directly to the drain trap downstream of the drain to clean the drain trap and replace any liquid held within the drain trap. For example, the control may be by a computerized controller.

[0023] Reference is now made to Figures 2A and 2B, which are schematic diagrams of an electronically operated drain cleaning and maintenance system 200, in accordance with an embodiment of the present invention.

[0024] As shown in FIGS. 2A and 2B, the drain cleaning and maintenance system 200 includes a drain assembly 202 and a cleaning and maintenance assembly 204.

[0025] The drain assembly 202 includes a straight pipe segment 210 having a longitudinal axis 212. An inlet end 214 of the straight pipe segment 210 is adapted to be connected to a drain inlet of a plumbing fixture, such as a sink. The straight pipe segment 210 includes a second inlet 216 having a longitudinal axis 217 angled relative to the longitudinal axis 212 such that as fluid flows from the second inlet 216 into the straight pipe segment 210, the fluid turns at an obtuse angle α. The angle at which liquid flows from the second inlet 216 into the straight pipe segment 210 ensures that the fluid flowing through the second inlet impinges on and cleans the walls of the straight pipe segment and / or the walls of additional components of the drain assembly 202 downstream from the second inlet 216.

[0026] An outlet end 218 of the straight pipe segment 210 downstream of the second inlet 216 is connected to a drain trap or siphon 220 via a first connector 222. The drain trap 220 is connected to a sewer drain pipe 230 via a second connector 225. In some embodiments, the first connector 222 and / or the second connector 225 may be a drain trap nut, as is commonly used in the plumbing arts. However, any other suitable connection mechanism is contemplated to be within the scope of the present invention.

[0027] The cleaning and maintenance assembly 204 includes a pipe 238 having a maintenance assembly inlet 240 connected to the water mains or another source of water flowing at high pressure via a maintenance inlet pipe 241, and a maintenance assembly outlet 242 that is connected or connectable to the second inlet 216 of the drain assembly 202. The source of water flowing at high pressure has an absolute pressure of at least 2 bar, and in some embodiments has an absolute pressure in the range of 3-5 bar.

[0028] The cleaning and maintenance assembly 204 further includes an electronic valve 244 having an open operational state in which liquid may flow through a pipe 238 between a maintenance assembly inlet 240 and a maintenance assembly outlet 242, and a closed operational state in which fluid flow is blocked through the pipe 238, for example, from the maintenance assembly inlet 240 to the maintenance assembly outlet 242. An electronic controller 246 is adapted to control the transition of the electronic valve 244 between the open and closed operational states. A power source 248, such as one or more suitable batteries, is adapted to provide power to the electronic valve 244 and the electronic controller 246.

[0029] In the embodiment shown in FIG. 2A, the maintenance assembly outlet 242 of the cleaning and maintenance assembly 204 is connected to the second inlet 216 of the drain assembly 202 by a pipe 260.

[0030] In the embodiment shown in FIG. 2B, the maintenance assembly outlet 242 of the cleaning and maintenance assembly 204 is directly connected to the second inlet 216 of the drain assembly 202 without the need for an intervening pipe.

[0031] A particular feature of the present invention is that the maintenance inlet pipe 241 may be connected to a branch of a hose or pipe leading to a plumbing fixture, as described in more detail below. However, as described herein below, the cleaning and maintenance assembly 204 ensures that liquid exiting the maintenance assembly outlet 242 maintains water pressure in that hose or pipe, as opposed to water flowing through the plumbing fixture and into a drain, which significantly reduces water pressure. For example, the dimensions of the pipe 238, the maintenance inlet pipe 241, and, if applicable, the pipe 260 may be selected to maintain fluid pressure in the pipe 238 substantially equal to the pressure generated from the water main or source of liquid. Thus, the pipes 238, 241, and 260 may have similar diameters and / or be substantially straight to avoid significant pressure losses due to liquid following curves and bends. In other embodiments, the dimensions of pipe 238, maintenance inlet pipe 241, and, if relevant, pipe 260 may be selected so that the fluid pressure in pipe 238 is high relative to the pressure generated from the water main or liquid source, for example by using pipes with a smaller diameter.

[0032] In some embodiments, the cleaning and maintenance assembly 204 may further include or be associated with a communication interface 250, such as a remote control or a transceiver for communication with a control operator's device. In such embodiments, the electronic controller 246 may receive control inputs from a remote control via the communication interface. For example, the electronic controller 246 may receive a control input to transition the electronic valve 244 to an open state at a particular time or after a particular event. In some embodiments, the remote controller may be part of a "smart house" control module and may be operated by a user via a suitable application running on a computing device, such as a mobile phone.

[0033] As another example, the electronic controller 246 may send output messages to a remote controller or a control operator's device via the communication interface 250. For example, the electronic controller 246 may provide periodic maintenance notifications (e.g., battery replacement, cleaning or replacement of filters or valves) or may provide notifications when the system fails. In some such embodiments, the cleaning and maintenance assembly 204 may further include one or more sensors 251 adapted to sense conditions in the vicinity of the assembly 204 to identify whether the assembly 204 is operating properly. For example, the assembly 204 may include an audio sensor adapted to sense sounds generated by the flow of water through the pipe 238, and the electronic controller is adapted to provide a failure notification when it transitions the electronic valve 244 to an open state, but the sensor 251 does not provide a signal to the electronic controller indicating that it has sensed the sound of water passing through the pipe 238.

[0034] In some embodiments, the electronic controller 246 may be programmable. For example, the electronic controller may be programmed to transition the electronic valve 244 to an open state at a first particular time of day and to return the electronic valve 244 to a closed state after a predetermined period of time every particular time of day. In some such embodiments, the electronic controller 246 may be further associated with a clock or timer 249.

[0035] In some such embodiments, programming of the electronic controller 246 may be performed from a remote control, with the programmed times and durations of the day being communicated to the electronic controller 246 via the transceiver 250. In other embodiments, programming of the electronic controller 246 may be performed directly via a user interface 252, for example, forming part of the maintenance assembly 204 and operatively associated with the electronic controller 246. The user interface 252 may include one or more input interfaces, such as a keyboard, a touchpad, a mouse, appropriate buttons, etc. The user interface 252 may further include one or more output interfaces, such as a screen or display, or an audio output, such as a speaker.

[0036] In some embodiments, the electronic controller 246 may be operatively associated with or may receive input from one or more sensors 254. The sensor(s) 254 may be disposed within the drain assembly 202 and may provide input indicative of a need for maintenance and / or cleaning of the siphon 220, such as an input indicative of the formation of a biofilm within the siphon.

[0037] The user first ensures that the power supply 248 is charged before installing the cleaning and maintenance assembly 204. The user then connects the maintenance inlet pipe 241 between the maintenance assembly inlet 240 and the water main or other high pressure liquid source, and connects the maintenance assembly outlet 242 to the second inlet 216 of the straight pipe segment 210, either directly or using an intervening pipe 260. If the user is retrofitting a straight drain without a second inlet before installing the cleaning and maintenance assembly 204, the user may replace the existing straight drain with a straight drain pipe 210 with the second inlet 216.

[0038] In some embodiments, a user can program the electronic controller 246 to operate at a desired time or can send an activation signal to the electronic controller 246 from a remote control, such as a suitable application on the user's mobile phone.

[0039] In other embodiments, the electronic controller 246 may be pre-programmed to transition the electronic valve 244 to an open state at a particular time and for a particular duration. In such embodiments, no additional programming is required and once installed, the cleaning and maintenance assembly operates automatically without the user having to remember to activate the cleaning and maintenance assembly and that maintenance / cleaning is required.

[0040] In some embodiments, when liquid flows through the pipe 238 from the maintenance assembly inlet 240 to the maintenance assembly outlet 242, the absolute pressure at the maintenance assembly outlet 242 is at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, or at least 95% of the absolute pressure at the maintenance assembly inlet 240. In some embodiments, the cleaning and maintenance assembly 204 does not have a pumping mechanism that pumps the liquid towards the maintenance assembly outlet 242 or another mechanism that increases the absolute pressure of the water in the cleaning and maintenance assembly 204 after the liquid enters the maintenance assembly inlet 240. In some embodiments, the only volume of the cleaning and maintenance assembly 204 that is suitable for water flowing through the cleaning and maintenance assembly 204 is the volume of the pipe 238.

[0041] Reference is now made to FIG. 3, which is a schematic diagram of another electronically operated drain cleaning and maintenance system 300, according to one embodiment of the present invention. System 300 is substantially similar to system 200 described above with respect to FIGS. 2A and 2B. The main difference between the two systems is that in FIG. 3, the siphon 320 of the drain assembly 302 includes a second inlet 316 such that the cleaning and maintenance assembly 204 is directly connected to the siphon 320. The longitudinal axis 317 of the second inlet 316 is disposed at an angle relative to the longitudinal axis 321 of the siphon 320 and the flow of water through the siphon. In the embodiment of FIG. 3, the straight pipe segment (210 in FIGS. 2A and 2B) may be omitted or replaced with a straight pipe segment that does not include a second inlet.

[0042] 3, the maintenance assembly outlet 242 of the maintenance assembly 204 is connected to the second inlet 316 of the siphon 320 by a pipe 260. However, it should be understood that the cleaning and maintenance assembly 204 may also be directly connected to the second inlet 316, as shown in FIG.

[0043] The angle at which water enters the siphon 320 from the second inlet 316 ensures that the fluid flowing through the second inlet impacts and washes the walls of the siphon.

[0044] The components and functions of the cleaning and maintenance assembly 204 of Figure 3 are substantially identical to those shown in Figures 2A and 2B, and for the sake of brevity, a detailed description thereof will not be repeated herein. Similarly, the cleaning and maintenance assembly 204 of Figure 3 is designed to at least maintain, and in some embodiments even increase, the water pressure of the water flowing through the cleaning and maintenance assembly, such that the water can directly impinge on the walls of the siphon to clean those walls, substantially as described above.

[0045] When installing the cleaning and maintenance assembly 204 in the system 300, the user will secure power and connect the maintenance inlet pipe 241 substantially as described above with respect to Figures 2A and 2B. The user will connect the maintenance assembly outlet 242 of the maintenance assembly 204 to the second inlet 316 of the siphon 320, either directly or using an intervening pipe 260. If the user is retrofitting a drain where the siphon does not have a second inlet, the user may replace the existing siphon with a siphon 320 that has a second inlet 316 prior to installing the cleaning and maintenance assembly 204. Programming of the cleaning and maintenance assembly 204 is substantially as described above with respect to Figures 2A and 2B.

[0046] As described above with respect to Figures 2A and 2B, the drain cleaning and maintenance assembly of Figure 3 can be pre-programmed and can operate automatically at regular times or intervals without the need for user attention for drain cleaning and maintenance.

[0047] Reference is now made to FIG. 4, which is a schematic diagram of yet another electronically operated drain cleaning and maintenance system 400, according to one embodiment of the present invention. System 400 is substantially similar to system 300 described above with respect to FIG. 3. The main difference between the two systems is that in FIG. 4, cleaning and maintenance assembly 404 is integrally formed with siphon 420 as a single unit, such that water flowing through pipe 438 of cleaning and maintenance assembly 404 flows directly to siphon 420, for example, through its wall. In some embodiments, siphon 420 including cleaning and maintenance assembly 404 may be manufactured as a single unit, for example, with an integral plastic housing. In such an embodiment, straight pipe segment (210 in FIGS. 2A and 2B) may be omitted or replaced with a straight pipe segment that does not include a second inlet.

[0048] The components and functions of the cleaning and maintenance assembly 404 of Figure 4 are substantially identical to those shown in Figures 2A and 2B, and for the sake of brevity, a detailed description thereof will not be repeated herein. The cleaning and maintenance assembly 404 of Figure 4 is substantially designed to at least maintain, and in some embodiments even increase, the water pressure of the water flowing through the cleaning and maintenance assembly, as described above with respect to Figures 2A and 2B and 3, such that the water impinges on the walls of the siphon to clean the walls.

[0049] When installing the cleaning and maintenance assembly 404 in the system 400, the user replaces the existing siphon with the siphon 420 that contains the cleaning and maintenance assembly 404. The user will ensure power supply to the components of the cleaning and maintenance assembly and connect the pipes 441 substantially as described above with respect to Figures 2A and 2B. Programming of the cleaning and maintenance assembly 404 is substantially as described above with respect to Figures 2A and 2B.

[0050] As described above with respect to Figures 2A and 2B, the cleaning and maintenance assembly of Figure 4 can be pre-programmed and can operate automatically at regular times or intervals without the need for user attention for drain cleaning and maintenance.

[0051] Reference is now made to FIG. 5, which is a schematic diagram of another integrated, electronically operated drain cleaning and maintenance system 500, in accordance with one embodiment of the present invention.

[0052] System 500 is substantially similar to system 400 described above with respect to Figure 4. The main difference between the two systems is in the construction of the drain assembly.

[0053] Specifically, the drain assembly 502 of the system 500 includes a straight pipe segment 510 slidably disposed within a siphon 520 connected to or integrally formed with a sewer drain pipe 530 .

[0054] Siphon 520 is an integrally formed element including a downward flow passage 522 and an upward flow passage 524 separated by a wall 526. Downward flow passage 522 is in fluid communication with upward flow passage 524 through a removable drain trap cover 528 sealingly disposed around the lower end of drain trap 520. A sewer drain pipe 530 is in fluid communication with upward flow passage 524.

[0055] Straight pipe segment 510 is disposed within downward flow path 522. However, the diameter of straight pipe segment 510 (denoted as D1) is smaller than the diameter of downward flow path 522 (denoted as D2) such that fluid can flow from straight pipe segment 510 throughout the entire length of downward flow path 522.

[0056] The straight pipe segment 510 is adapted to be connected, via a one-way valve 540, to a drain inlet 503 of a plumbing fixture, such as a sink.

[0057] Since the drain trap 520 is integrally formed with the sewer drain pipe 530, in some embodiments, the height at which the drain trap 520 is installed relative to the inlet 503 may be determined by the height of the center of the sewer drain pipe 530. Thus, depending on the installation requirements, a longer straight pipe segment 510 may be required to bridge the gap between the inlet height and the sewer pipe height. To easily bridge gaps of different sizes, the straight pipe segment 510 is slidable relative to the downward flow path 522 of the drain trap 520. Furthermore, in some embodiments, the straight pipe segment 510 may have different vertical lengths. The length of the straight pipe 510 and the extent to which it is located within the trap 520 is determined once at the time of installation. To ensure that the straight pipe segment is in fluid communication with the pressure equalization mechanism described below, the end of the straight pipe 510 distal to the inlet 503 should be located above the water level in the drain trap and near the vertical center of the sewer drain pipe 530.

[0058] The one-way valve 540 allows the flow of running water and seals the passage between the drain trap and the fixture when water is not flowing. The one-way valve is normally closed such that when water is not flowing into or out of the one-way valve, the one-way valve blocks fluid flow into and / or out of the drain trap 520 and the straight pipe segment 510, thereby preventing bacteria and / or contaminated aerosols from flowing back out of the pipe 510 into the plumbing fixture. Thus, the one-way valve 540 is normally closed.

[0059] As water flows into one-way valve 540, pressure is applied and the one-way valve opens. Thus, as water drains through the plumbing fixture inlet into one-way valve 540, the weight of the water causes the one-way valve to open a gap through which the water can flow into straight pipe segment 510. While the water is draining from the gap, the water flow inhibits the flow of air through the gap in the opposite direction (outside straight pipe segment 510), and thus, during that time, backflow of contaminated aerosols and / or bacteria is greatly limited and / or inhibited.

[0060] Pressure built up in the straight pipe segment 510 through the use of the one-way valve 540 is relieved by the pressure equalization element 550. The pressure equalization element 550 comprises a tube or conduit, which in some embodiments may be integrally formed with the drain trap 520 and is in fluid communication with the downward flow path 522 via a first end extending from a hole 527 in the top of the wall 526 above the water level in the drain trap 520. The fluid communication between the straight pipe segment 510 and the downward flow path 522 also places the pressure equalization element 550 in fluid communication with the straight pipe segment 510. In some embodiments, a second one-way valve 552 is disposed in the pressure equalization element 550 adjacent the hole 527 to prevent fluid flow from the pressure equalization element 550 into the downward flow path 522. The second one-way valve 552 ensures that backflow of gas from the sewer into the downward flow path 522 does not occur, for example, if pressure increases in the upward flow path 524 (e.g., due to a sewer blockage).

[0061] In some embodiments, the pressure equalization element 550 is in fluid communication with the upward flow path 524 downstream of the second one-way valve 552 via a path 554 in the conduit of the pressure equalization element 550. Thus, the pressure equalization element 550 is in fluid communication with the sewer drain pipe 530. In some embodiments, the second end of the pressure equalization element 550 is sealed by a lid 560 such that fluid flowing from the first end of the pressure equalization element toward the second end is exhausted from the pressure equalization element via path 554.

[0062] In use, when gas pressure builds up in the downward flow path 522 of the drain trap 520 above the water level 568, the pressurized gas flows into the pressure equalization element 550 via the second one-way valve 552 and flows toward the second end of the pressure equalization element. The second end of the pressure equalization element is sealed by the lid 560, so that the pressurized gas can flow through the pathway 554 to the upward flow path 524 and from there to the sewer drain pipe 530. The pressure equalization element 550 thus serves to equalize the gas pressure between the straight pipe segment 510 and the downward flow path 524 of the drain trap 520, which is fluidly connected to the sewer pipe 530.

[0063] The pressure difference between the straight pipe segment 510 and the downward flow path 522 (above the water level in the trap 520) and the upward flow path 524 in the drain trap 520 causes gas to flow from the hole 527 through the one-way valve 552 towards the second end of the pressure equalization element 550 and from there through the passage 554 into the upward flow path 524 and into the sewer pipe 530, thereby relieving pressure and allowing the one-way valve 540 to function properly. Furthermore, because the bacteria and / or contaminated aerosols that the present invention is intended to block are located within the straight pipe segment 510, airborne bacteria and / or contaminated aerosols also flow through the pressure equalization element 550 and away from the inlet 502 and are captured downstream of the drain trap 520, thereby further reducing or eliminating the possibility of contaminated backflow through the inlet 502. One-way valve 552 and high pressure in downward flow passage 522 prevent backflow of gas from sewer pipe 530 into downward flow passage 522 or straight pipe segment 510 .

[0064] The siphon 520 includes a second inlet 566 disposed at an angle relative to the downward flow path 522. The maintenance assembly outlet 242 of the cleaning and maintenance assembly 204, described in detail above with respect to Figures 2A and 2B, is directly connected to the second inlet 566 of the siphon 520 for automatic maintenance and cleaning of the siphon, substantially as described above with respect to Figure 2B. However, in some embodiments, the cleaning and maintenance assembly 204 may be connected to the siphon 520 by a connecting pipe 260, as shown in Figure 2A, or may be integrally formed with the siphon, as shown in Figure 4.

[0065] In some embodiments, sliding of the straight pipe segment 510 into the downward flow path 522 is limited by the second inlet 566 or by connection of the cleaning and maintenance assembly 204 through, for example, the maintenance assembly outlet 242 or pipe 260.

[0066] It should be understood that the cleaning and maintenance assembly 204 may be used with any pressure equalization drain trap, such as those described in U.S. Patent Application Publication No. 2021 / 0388589, which is incorporated by reference as if fully set forth herein.

[0067] As described above with respect to Figures 2A and 2B, the cleaning and maintenance assembly of Figure 5 can be pre-programmed and can operate automatically at regular times or intervals without the need for user attention for drain cleaning and maintenance.

[0068] Reference is now made to Figures 6A, 6B, 6C, 6D, 6E, 6F, and 6G, which are respectively an exploded perspective view, an assembled perspective view, a partial assembled perspective view, a side plan view, a front plan view, and two cross-sectional views of another integrated drain cleaning and maintenance system 600 according to an embodiment of the present invention.

[0069] System 600 is substantially similar to system 500 described above with respect to Figure 5. One of the main differences between the two systems is the location of the cleaning and maintenance assembly within the system. System 600 includes a siphon 620 connected to or integrally formed with a sewer drain pipe 630, substantially as shown in Figure 5.

[0070] 6H and 6I, which are side and cross-sectional views of an integrated drain cleaning and maintenance system 600 having a drain assembly 602 that includes a one-way valve 640. The drain assembly 602 includes a straight pipe segment 610 slidably disposed within a siphon 620, substantially as shown in FIG.

[0071] The siphon 620 is an integrally formed element that includes a downward flow passage 622 and an upward flow passage 624 separated by a wall 626. The downward flow passage 622 is in fluid communication with the upward flow passage 624 through a removable drain trap lid 628 sealingly disposed around the lower end of the drain trap 620. A sewer drain pipe 630 is in fluid communication with the upward flow passage 624. The drain lid 628 is described in more detail below.

[0072] As discussed above with respect to FIG. 5, the straight pipe segment 610 can be adjusted to accommodate different drain trap heights.

[0073] System 600 may include a one-way valve 640 and a pressure equalization element 650, substantially as described above with respect to FIG.

[0074] System 600 differs from the systems described above in that the cleaning and maintenance assembly 204 is disposed within a drain trap lid 628. Specifically, lid 628 includes a cylindrical portion 660 and a base 670, the base defining a central second inlet 676. A power source, shown here as a battery 678, and electronic controller 246 are disposed within base 670 and are protected from liquids by a cover 680.

[0075] The electronic valve 244, which may be a solenoid valve, is disposed within the cover 680 such that the maintenance assembly inlet 240 is disposed within the second inlet 676 and the maintenance assembly outlet 242 is disposed within the cylindrical portion 660 of the lid 628. Thus, the maintenance assembly inlet 240 of the cleaning and maintenance assembly 204 is in fluid communication with a second pipe leading to a fluid source via the second inlet 676. Furthermore, when the electronic valve 244 is open and allows fluid flow from the maintenance assembly inlet 240 to the maintenance assembly outlet 242, fluid flows from the maintenance assembly outlet directly into the siphon 620 in a direction towards the drain assembly 602.

[0076] In some embodiments, a pressure increase tube 690 may extend from the maintenance assembly outlet 242 to the siphon 620. The pressure increase tube 690 terminates in an orifice 692 having a smaller diameter than the maintenance assembly outlet 242, thus increasing the pressure of the fluid flowing through the electronic valve (when the valve is open). Additionally, the pressure increase tube 690 ensures that the flow of fluid through the cleaning and maintenance assembly reaches a sufficiently high portion of the wall of the siphon 620 to facilitate cleaning of that wall, substantially as described above. Additionally, the pressure increase tube 690 may allow fluid to be discharged above the water level in the siphon to replace the fluid in the siphon.

[0077] Components and functions of system 600 not explicitly mentioned herein are substantially identical to those shown in Figure 5, and for the sake of brevity, detailed descriptions thereof will not be repeated herein. Similarly, the cleaning and maintenance assembly of system 600 is designed to at least maintain, and in some embodiments even increase, the water pressure of the water flowing through the maintenance assembly, allowing the water to impinge on the walls of the siphon to clean the siphon, substantially as described above.

[0078] As described above with respect to Figures 2A and 2B, the cleaning and maintenance assembly of Figures 6A-6I can be pre-programmed and can operate automatically at regular times or intervals without the need for user attention for drain cleaning and maintenance.

[0079] Reference is now made to Figures 7A, 7B, 7C, and 7D, which are exploded perspective, partial assembled perspective, assembled perspective, and cross-sectional views, respectively, of another integrated drain cleaning and maintenance system 700 according to an embodiment of the present invention.

[0080] System 700 is substantially similar to system 600 described above with respect to Figures 6A-6I. The primary difference between the two systems is the location of the electronic controls and power supply for the cleaning and maintenance assembly.

[0081] In system 700, the electronic valve 244, and in some embodiments, also the pressure increase tube 690, are located within the lid 628 of the siphon 620 as shown in system 600. However, the electronic controller 246 and power supply 248, which are more sensitive to getting wet, are located outside the siphon 620 in their own compartment 702.

[0082] As described above with respect to Figures 2A and 2B, the cleaning and maintenance assembly of Figures 7A-7D can be pre-programmed and can operate automatically at regular times or intervals without the need for user attention for drain cleaning and maintenance.

[0083] Reference is now made to Figure 8, which is a schematic diagram of another electronically operated drain cleaning and maintenance system 800, in accordance with one embodiment of the present invention. System 800 is substantially similar to system 200 described above with respect to Figures 2A and 2B. The primary difference between the two systems is that siphon 220 (Figures 2A and 2B) is replaced by a U-shaped drain trap 820 in Figure 8. As a result, sewer drain 830 in Figure 8 is curved compared to the straight sewer drain pipe 230 in Figures 2A and 2B.

[0084] The components and functions of the cleaning and maintenance assembly 204 of Figure 8 are substantially identical to those shown in Figures 2A and 2B, and for the sake of brevity, a detailed description thereof will not be repeated herein. Similarly, the cleaning and maintenance assembly 804 of Figure 8 is designed to at least maintain, and in some embodiments even increase, the water pressure of the water flowing through the maintenance assembly so that the water impinges on and cleans the walls of the drain trap, substantially as described above.

[0085] The installation and programming of the cleaning and maintenance assembly 204 in the system 800 is substantially identical to the installation described above with respect to Figures 2A and 2B.

[0086] As described above with respect to Figures 2A and 2B, the cleaning and maintenance assembly of Figure 8 can be pre-programmed and can operate automatically at regular times or intervals without the need for user attention for drain cleaning and maintenance.

[0087] Reference is now made to FIG. 9, which is a schematic diagram of another electronically operated drain cleaning and maintenance system 900, according to one embodiment of the present invention. System 900 is substantially similar to system 800 described above with respect to FIG. 8. One major difference between the two systems is that in FIG. 8, the U-shaped drain trap 920 includes a second inlet 916 such that the cleaning and maintenance assembly 204 is directly connected to the U-shaped drain trap 920, typically connected to a straight segment thereof. The longitudinal axis 917 of the second inlet 916 is disposed at an angle relative to the longitudinal axis 921 of the drain trap 920 at the connection location and relative to the flow of water through the drain trap at that location. In the embodiment of FIG. 9, the straight pipe segment (210 in FIGS. 2A, 2B, and 8) may be omitted or replaced with a straight pipe segment that does not include a second inlet.

[0088] 9, the cleaning and maintenance assembly 204 maintenance assembly outlet 242 is connected to the second inlet 916 of the drain trap 920 by a pipe 260. However, it should be understood that the cleaning and maintenance assembly 204 may also be directly connected to the second inlet 916, as shown in FIG.

[0089] The components and functions of the cleaning and maintenance assembly 204 of Figure 9 are substantially identical to those shown in Figures 2A and 2B, and for the sake of brevity, a detailed description thereof will not be repeated herein. Similarly, the cleaning and maintenance assembly 204 of Figure 9 is designed to at least maintain, and in some embodiments even increase, the water pressure of the water flowing through the maintenance assembly so that the water impinges on and cleans the walls of the siphon, substantially as described above.

[0090] When installing the cleaning and maintenance assembly 204 in the system 900, the user will secure power and connect the maintenance inlet pipe 241 substantially as described above with respect to Figures 2A and 2B. The user will connect the maintenance assembly outlet 242 of the maintenance assembly 204 to the second inlet 916 of the drain trap 920, either directly or using an intervening pipe 260. If the user is retrofitting a drain where the drain trap does not have a second inlet, the user may replace the existing drain trap with a drain trap 920 that does have a second inlet 916 prior to installing the cleaning and maintenance assembly 204. Programming of the cleaning and maintenance assembly 204 is substantially as described above with respect to Figures 2A and 2B.

[0091] As described above with respect to Figures 2A and 2B, the cleaning and maintenance assembly of Figure 9 can be pre-programmed and can operate automatically at regular times or intervals without the need for user attention for drain cleaning and maintenance.

[0092] Reference is now made to Figures 10A, 10B, 10C, and 10D, which are a front plan view and three cross-sectional views, respectively, of a nozzle 1000 for connecting the drain cleaning and maintenance assembly of any one of Figures 2A-9 to a drain assembly, Figures 10B, 10C, and 10D being taken along section lines CC, AA, and DD, respectively.

[0093] As shown, the nozzle 1000 includes a neck portion 1002 and a head portion 1004, the head portion having a larger diameter than the neck portion. An internal pipe 1006 runs along the inside of the neck portion 1002 and the head portion 1004, the pipe having a nozzle inlet at the neck portion 1002 and closed at the head portion 1004. A first plurality of nozzle outlets 1008 are disposed within a first hemisphere around the head portion 1004, and a second plurality of nozzle outlets 1010 are disposed within a second hemisphere around the head portion 1004 below the first hemisphere. In the illustrated embodiment, each nozzle outlet 1010 is disposed between two nozzle outlets 1008. Each nozzle outlet 1008 and 1010 is in fluid communication with the pipe 1006.

[0094] When the nozzle 1000 is positioned in a pipe or flow path, such as in the maintenance assembly outlet 242 of the cleaning and maintenance assembly of FIG. 2B, or in the outlet of the intervening pipe 260 of FIG. 2A, pressurized liquid flowing from the cleaning and maintenance assembly to the second inlet flows into the pipe 1006 and from there is distributed to the nozzle outlets 1008 and 1010, such that the water impacts the walls of the straight pipe segment 210 and / or siphon 220 in multiple directions determined by the orientation of the nozzle outlets 1008 and 1010.

[0095] It should be understood that the nozzle 1000 may be designed and configured depending on the particular application or drain assembly in which it is installed. Thus, the nozzle 1000 may have more or fewer nozzle outlets than shown in the drawings. The nozzle 1000 may have nozzle outlets in one or more angular orientations around the circumference of the head portion. The nozzle 1000 may have nozzle outlets in a single location or in multiple locations along the longitudinal axis of the pipe 1006.

[0096] In some embodiments, one or more of the nozzle outlets of the nozzle 1000 may extend beyond the footprint of the head portion 1004. For example, one or more of the nozzle outlets may include an outlet pipe or conduit.

[0097] 11A and 11B show static and flow schematic cross-sectional views of another nozzle 1100 for connecting the drain cleaning and maintenance assembly of any one of FIGS. 2A-9 to a drain assembly.

[0098] 11A and 11B, the nozzle 1100 includes a main pipe 1106 having a nozzle inlet 1102 and terminating in three nozzle outlets 1108a, 1108b, and 1108c, each facing at a different angular direction. Thus, as shown in FIGURE 11B, when water or other liquid enters the nozzle inlet 1102, the water exits the nozzle outlets 1108 in the directions indicated by arrows 1110a, 1110b, and 1110c, respectively.

[0099] It should be understood that the nozzle 1100 may be designed and configured depending on the particular application or drain assembly in which it is installed. Thus, the nozzle 1100 may have more or fewer nozzle outlets than shown in the drawings. The nozzle 1100 may have nozzle outlets at one or more angular orientations. The nozzle 1100 may have nozzle outlets at a single location or at multiple locations along the longitudinal axis of the pipe 1106.

[0100] In some embodiments, one or more nozzle outlets of the nozzle 1100 may extend beyond the footprint of the nozzle. For example, one or more of the nozzle outlets may include a nozzle outlet pipe or conduit.

[0101] 12A, 12B, and 12C are schematic diagrams of embodiments of nozzles for connecting any one of the cleaning and maintenance assemblies of FIGS. 2A-9, such as the maintenance assembly 204 of FIG. 3, to a drain assembly, such as the drain assembly 302 of FIG. 3, in accordance with an embodiment of the present invention.

[0102] 12A-12C, the siphon 320 of the drain assembly 302 includes a second inlet 316. The maintenance assembly outlet of the maintenance assembly 204 is connected to the second inlet 316 via a pipe 260. In the illustrated embodiment, the siphon 320 is integrally formed with a drain receptacle 1200 and is located below a bottom surface 1202 of a plumbing fixture, such as a sink. The drain receptacle 1200 is in fluid communication with a drain inlet 1204 of the plumbing fixture.

[0103] 12A, the end 1210 of the pipe 260 located within the second inlet 316 is open, allowing water or another liquid to flow freely through the pipe 260 without further obstruction at an angle defined by the second inlet 316 into the siphon 320. In this arrangement, no nozzle is used.

[0104] 12B, a nozzle 1220 is disposed at the end 1210 of the pipe 260 within the second inlet 316. The nozzle 1220 includes two nozzle outlets 1222 and 1224, and water is redirected to flow out of the end 1210 and into upstream and downstream portions of the siphon 320, as shown by the arrows.

[0105] Figure 12C shows a nozzle 1240 that is substantially similar to nozzle 1220 of Figure 12B. However, in addition to nozzle outlets 1222 and 1224, nozzle 1240 includes a third nozzle outlet hole 1242 along the longitudinal axis of pipe 260. Thus, at least a portion of the flow from pipe 260 to siphon 320 continues in the original direction through nozzle outlet 1242.

[0106] Reference is now made to FIG. 13, which is a simplified flow chart of a method of installing the cleaning and maintenance system of any of FIGS. 2A-9, in accordance with an embodiment of the present invention.

[0107] In step S1300, a maintenance assembly outlet of a cleaning and maintenance assembly, such as, for example, as described above with respect to any one of Figures 2A-9, is connected to a drain inlet of a drain system upstream of the drain trap or directly to an inlet to the drain trap. Step S1300 may not be necessary if the cleaning and maintenance assembly is integrally formed with the drain trap, as shown in Figure 4.

[0108] In step S1302, this step is typically performed while an electronic valve (e.g., 244 in FIGS. 2A and 2B) of the cleaning and maintenance assembly is in a closed state and a maintenance assembly inlet of the cleaning and maintenance assembly is connected to a source of pressurized water or other liquid. In some embodiments, the source of pressurized water may be a water main. In some such embodiments, prior to step S1302, in step S1304, a pipe extending from the water main to a plumbing fixture, e.g., a faucet, may optionally be split such that one section of the pipe is connected to the faucet and another section of the pipe is connected to the cleaning and maintenance assembly in step S1302.

[0109] In step S1306, an electronic valve of the cleaning and maintenance assembly is controlled to an open state so that water flowing from the pressurized source through the cleaning and maintenance assembly cleans and maintains the drain trap.

[0110] Typically, the control is automatic, as described above with respect to Figures 2A-9. In some such embodiments, prior to step S1306, in step S1308, the cleaning and maintenance assembly may be programmed to open at a particular time or may receive input from a remote control device instructing it to control the electronic valve to open.

[0111] In some embodiments, programming the cleaning and maintenance assembly includes applying a predefined program to the cleaning and maintenance assembly and may be performed during manufacture of the cleaning and maintenance assembly.

[0112] In some embodiments, the cleaning and maintenance assembly may be preloaded with a number of predefined programs, and programming the cleaning and maintenance assembly may include selecting one of the number of predefined programs.

[0113] Unless otherwise specified, all fluid pressures referred to in this application and claims are understood to be absolute pressures.

[0114] It should be appreciated that if the pressurized cleaning fluid flows directly into the drain trap at an angle to the flow from the drain to the drain trap, cleaning of the walls of the drain trap will be more effective than if the pressurized cleaning fluid flows into the drain trap together with the flow from the drain to the drain trap.

[0115] Various embodiments of the present invention are provided below.

[0116] Embodiment 1: a drain trap having a first inlet in fluid communication with a drain of the plumbing fixture; a second inlet in fluid communication with the drain trap; a cleaning and maintenance assembly in fluid communication with the second inlet, the cleaning and maintenance assembly comprising: a maintenance assembly inlet adapted to be in fluid communication with a source of pressurized liquid; a maintenance assembly outlet in fluid communication with an interior of the drain trap; a pipe disposed between the maintenance assembly inlet and the maintenance assembly outlet; an electronic valve having an open state that allows liquid to flow through the pipe from the maintenance assembly inlet to the maintenance assembly outlet and a closed state that blocks liquid flow from the maintenance assembly inlet to the maintenance assembly outlet; an electronic controller configured to transition the electronic valve between an open state and a closed state; and a power source adapted to power the electronic valve and the electronic control device, A drain cleaning and maintenance system, wherein the maintenance assembly inlet is connected to a pressurized liquid source and when the electronic valve is in an open state, liquid flows from the pressurized liquid source through the electronic valve and into the drain trap.

[0117] Embodiment 2: A drain cleaning and maintenance system as described in embodiment 1, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute output pressure of the liquid flowing from the maintenance assembly outlet is at least 70% of the absolute input pressure of the liquid when it flows into the maintenance assembly inlet.

[0118] Embodiment 3: A drain cleaning and maintenance system as described in embodiment 1, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute output pressure is at least 75% of the absolute input pressure.

[0119] Embodiment 4: A drain cleaning and maintenance system as described in embodiment 1, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute output pressure is at least 80% of the absolute input pressure.

[0120] Embodiment 5: A drain cleaning and maintenance system as described in embodiment 1, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute output pressure is at least 85% of the absolute input pressure.

[0121] Embodiment 6: A drain cleaning and maintenance system as described in embodiment 1, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute output pressure is at least 90% of the absolute input pressure.

[0122] Embodiment 7: A drain cleaning and maintenance system as described in embodiment 1, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute output pressure is at least 95% of the absolute input pressure.

[0123] Embodiment 8: A drain cleaning and maintenance system described in any one of embodiments 1 to 7, wherein when the maintenance assembly inlet is connected to a pressurized liquid supply source and the electronic valve is in an open state, the pressure difference between the absolute pressure of the liquid flowing into the maintenance assembly inlet and the absolute pressure of the liquid flowing out of the maintenance assembly outlet is up to 30%.

[0124] Embodiment 9: A drain cleaning and maintenance system described in any one of embodiments 1 to 7, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the pressure differential is up to 25%.

[0125] Embodiment 10: A drain cleaning and maintenance system described in any one of embodiments 1 to 7, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the pressure differential is up to 20%.

[0126] Embodiment 11: A drain cleaning and maintenance system described in any one of embodiments 1 to 7, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the pressure differential is up to 15%.

[0127] Embodiment 12: A drain cleaning and maintenance system described in any one of embodiments 1 to 7, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the pressure differential is up to 10%.

[0128] Embodiment 13: A drain cleaning and maintenance system described in any one of embodiments 1 to 7, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the pressure differential is up to 5%.

[0129] Embodiment 14: A drain cleaning and maintenance system described in any one of embodiments 1 to 13, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute input pressure of the liquid flowing into the maintenance assembly inlet is at least 2 bar.

[0130] Embodiment 15: A drain cleaning and maintenance system described in any one of embodiments 1 to 13, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute input pressure is at least 2.5 bar.

[0131] Embodiment 16: A drain cleaning and maintenance system described in any one of embodiments 1 to 13, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute input pressure is at least 3 bar.

[0132] Embodiment 17: A drain cleaning and maintenance system described in any one of embodiments 1 to 13, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute input pressure is at least 4 bar.

[0133] Embodiment 18: A drain cleaning and maintenance system described in any one of embodiments 1 to 13, wherein when the maintenance assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute input pressure is in the range of 2 to 5 bar.

[0134] Embodiment 19: A drain cleaning and maintenance system described in any one of embodiments 1 to 13, wherein when the assembly inlet is connected to a pressurized liquid source and the electronic valve is in an open state, the absolute input pressure is in the range of 3 to 5 bar.

[0135] Embodiment 20: A drain cleaning and maintenance system as described in any one of embodiments 1 to 19, wherein the electronic control device is adapted to maintain the electronic valve in an open state for a period of time sufficient to allow a flow of pressurized liquid from the source to the drain trap to replace at least a majority of the liquid in the drain trap.

[0136] Embodiment 21: A drain cleaning and maintenance system described in any one of embodiments 1 to 20, wherein the cleaning and maintenance assembly is external to the drain trap and is positioned on an inlet line leading to a second inlet, and the maintenance assembly outlet is fluidly connected to the drain trap via the second inlet.

[0137] Embodiment 22: A drain cleaning and maintenance system as described in any one of embodiments 1 to 21, further comprising a straight pipe segment arranged upstream of the drain trap, the straight pipe segment having a pipe inlet adapted to be fluidly connected to the drain of the plumbing fixture and a pipe outlet in fluid communication with the drain trap, the straight pipe segment including a second inlet.

[0138] Embodiment 23: The drain cleaning and maintenance system according to any one of embodiments 1 to 21, wherein the drain trap further comprises a second inlet.

[0139] Embodiment 24: A drain cleaning and maintenance system according to any one of embodiments 1 to 23, wherein the second inlet is angled relative to the flow path from the drain to the drain trap or relative to the flow path within the drain trap.

[0140] Embodiment 25: A drain cleaning and maintenance system described in any one of embodiments 1 to 24, wherein the maintenance assembly outlet of the cleaning and maintenance assembly is directly connected to the second inlet.

[0141] Embodiment 26: A drain cleaning and maintenance system described in any one of embodiments 1 to 24, wherein the maintenance assembly outlet of the cleaning and maintenance assembly is connected to the second inlet via a connector pipe segment.

[0142] Embodiment 27: A drain cleaning and maintenance system according to any one of embodiments 1 to 20, wherein the cleaning and maintenance assembly is integrally formed with the drain trap and the second inlet as a unitary structure.

[0143] Embodiment 28: A drain cleaning and maintenance system as described in embodiment 27, wherein the cleaning and maintenance assembly is positioned on or within a side wall of the drain trap and the flow from the second inlet to the drain trap is angled relative to the flow of water through the drain trap.

[0144] Embodiment 29: A drain cleaning and maintenance assembly as described in embodiment 27, wherein at least a portion of the cleaning and maintenance assembly is disposed at the bottom of the drain trap.

[0145] Embodiment 30: A drain cleaning and maintenance assembly as described in embodiment 29, wherein the second inlet is disposed at the bottom of the drain trap and accommodates the maintenance assembly inlet.

[0146] Embodiment 31: A drain cleaning and maintenance assembly as described in embodiment 29 or embodiment 30, wherein the maintenance assembly outlet is in direct fluid communication with the interior of the drain trap.

[0147] Embodiment 32: A drain cleaning and maintenance assembly described in any one of embodiments 29 to 31, wherein the electronic valve is disposed in the drain trap.

[0148] Embodiment 33: A drain cleaning and maintenance assembly described in any one of embodiments 29 to 32, wherein the electronic control device and power supply are disposed within the drain trap.

[0149] Embodiment 34: A drain cleaning and maintenance assembly described in any one of embodiments 29 to 32, wherein the electronic control device and power source are disposed on the outer wall of the drain trap.

[0150] Embodiment 35: The drain cleaning and maintenance system according to any one of embodiments 1 to 34, wherein the drain trap includes a siphon.

[0151] Embodiment 36: The drain cleaning and maintenance system according to any one of embodiments 1 to 35, wherein the drain trap comprises a U-shaped drain trap.

[0152] Embodiment 37: A drain cleaning and maintenance system described in any one of embodiments 1 to 36, wherein the maintenance assembly is functionally associated with the electronic control device and further includes a communication interface adapted to enable delivery of control inputs from a remote control device to the electronic control device.

[0153] Embodiment 38: A drain cleaning and maintenance system described in any one of embodiments 1 to 36, wherein the maintenance assembly further includes a communication interface functionally associated with the electronic control device and adapted to enable delivery of a maintenance output from the electronic control device to a remote control device.

[0154] Embodiment 39: A drain cleaning and maintenance system described in any one of embodiments 1 to 38, wherein the electronic control device is programmable.

[0155] Embodiment 40: A drain cleaning and maintenance system described in any one of embodiments 1 to 39, further comprising a user interface including at least one of an input interface that allows a user to provide input to the electronic control device and an output interface that allows the user to view the output of the electronic control device.

[0156] Embodiment 41: A drain cleaning and maintenance system described in any one of embodiments 1 to 40, wherein the cleaning and maintenance assembly further includes a timer functionally associated with the electronic control device.

[0157] Embodiment 42: A drain cleaning and maintenance system as described in any one of embodiments 1 to 41, further comprising at least one sensor adapted to sense at least one condition in the drain trap and provide a sensor input to the electronic control device, the sensor input indicating required maintenance of the drain trap.

[0158] Embodiment 43: A drain cleaning and maintenance system described in any one of embodiments 1 to 42, further comprising a nozzle including a nozzle inlet and at least one nozzle outlet, the nozzle being positioned in a flow path from the maintenance assembly outlet to the drain trap such that liquid flowing from the maintenance assembly outlet flows through the nozzle inlet and is redirected from the at least one nozzle outlet to the drain trap.

[0159] Embodiment 44: A drain cleaning and maintenance system according to any one of embodiments 1 to 43, wherein the drain cleaning and maintenance assembly does not include a pump mechanism.

[0160] Embodiment 45: A drain cleaning and maintenance system described in any one of embodiments 1 to 44, wherein the pipe is the only volume of the drain cleaning and maintenance assembly and is adapted to have liquid placed therein.

[0161] Embodiment 46: a drain trap having a first inlet adapted to be in fluid communication with a drain and a second inlet of the plumbing fixture; 1. A cleaning and maintenance assembly integral with a drain trap, comprising: a maintenance assembly inlet adapted to be in fluid communication with a source of pressurized liquid; a maintenance assembly outlet in fluid communication with the second inlet; a pipe disposed between the maintenance assembly inlet and the maintenance assembly outlet; an electronic valve having an open state that allows liquid to flow through the pipe from the maintenance assembly inlet to the maintenance assembly outlet and a closed state that blocks liquid flow from the maintenance assembly inlet to the maintenance assembly outlet; an electronic controller configured to transition the electronic valve between an open state and a closed state; a power source adapted to power an electronic valve and an electronic controller, The maintenance assembly inlet is in fluid communication with a pressurized supply source, and when the electronic valve is in an open state, liquid flows from the supply source through the second inlet and into the drain trap to clean the drain trap, a drain device.

[0162] Embodiment 47: A drain device as described in embodiment 46, wherein the second inlet is angled with respect to the flow path from the drain to the first inlet.

[0163] Embodiment 48: a drain trap having a first inlet adapted to be in fluid communication with a drain and a second inlet of the plumbing fixture; a maintenance assembly inlet extending through the second inlet and adapted to be in fluid communication with the pressurized liquid source; a maintenance assembly outlet in direct fluid communication with an interior of the drain trap; a pipe disposed between the maintenance assembly inlet and the maintenance assembly outlet; an electronic valve having an open state that allows liquid to flow through the pipe from the maintenance assembly inlet to the maintenance assembly outlet and a closed state that blocks liquid flow from the maintenance assembly inlet to the maintenance assembly outlet; an electronic controller configured to transition the electronic valve between an open state and a closed state; a power source adapted to power an electronic valve and an electronic controller, The drain device, wherein the maintenance assembly inlet is in fluid communication with a pressurized supply source, and when the electronic valve is in an open state, liquid flows from the pressurized supply source through the electronic valve and into the drain trap to clean the drain trap.

[0164] Embodiment 49: A drain device as described in embodiment 48, wherein the drain trap includes a drain trap lid disposed at its lower end, and the electronic valve, the pipe, and the maintenance assembly outlet are disposed within the drain trap lid.

[0165] Embodiment 50: A drain device as described in embodiment 49, wherein the electronic control device is disposed within the drain trap lid.

[0166] Embodiment 51: A drain device described in embodiment 49 or embodiment 50, wherein the power source is disposed within the drain trap lid.

[0167] Embodiment 52: A drain device as described in embodiment 49, wherein the electronic control device is disposed within an outer compartment of the drain trap.

[0168] Embodiment 53: A drain device described in embodiment 49 or embodiment 52, wherein the power source is disposed within an outer compartment of the drain trap.

[0169] Embodiment 54: A drain device described in any one of embodiments 46 to 53, wherein when the maintenance assembly inlet is connected to a pressurized supply source and the electronic valve is in an open state, liquid flows from the source to the drain trap at an absolute pressure substantially equal to the absolute pressure in the source.

[0170] Embodiment 55: The drain device according to any one of embodiments 46 to 54, wherein the drain trap includes a siphon.

[0171] Embodiment 56: A drain device described in any one of embodiments 46 to 55, wherein the maintenance assembly further includes a communication interface functionally associated with the electronic control device and adapted to enable delivery of control inputs from a remote control device to the electronic control device.

[0172] Embodiment 57: A drain device described in any one of embodiments 46 to 56, wherein the electronic control device is programmable.

[0173] Embodiment 58: A drain device described in any one of embodiments 46 to 57, further comprising a user interface including at least one of an input interface that allows a user to provide input to the electronic control device and an output interface that allows the user to recognize the output of the electronic control device.

[0174] Embodiment 59: A drain device described in any one of embodiments 46 to 58, wherein the cleaning and maintenance assembly further includes a timer functionally associated with the electronic control device.

[0175] Embodiment 60: A drain device described in any one of embodiments 46 to 59, further comprising at least one sensor adapted to sense at least one condition in the drain trap and provide a sensor input to the electronic control device, the sensor input indicating required maintenance of the drain trap.

[0176] Embodiment 61: The drain device of any one of embodiments 46 to 60, further comprising a nozzle including a nozzle inlet and at least one nozzle outlet, the nozzle being positioned within the second inlet such that liquid flowing from the maintenance assembly outlet flows through the nozzle inlet and is redirected from the at least one nozzle outlet to the drain trap.

[0177] Embodiment 62: A method for cleaning and maintaining a drain trap of a drain, the drain trap having a first inlet, the method comprising: (a) a maintenance assembly entrance; a maintenance assembly outlet; a pipe disposed between the maintenance assembly inlet and the maintenance assembly outlet; an electronic valve having an open state that allows liquid to flow through the pipe from the maintenance assembly inlet to the maintenance assembly outlet and a closed state that blocks liquid flow from the maintenance assembly inlet to the maintenance assembly outlet; an electronic controller configured to transition the electronic valve between an open state and a closed state; a power supply adapted to power the electronic valve and the electronic control device; (b) connecting a maintenance assembly outlet of the cleaning and maintenance assembly to a second inlet in fluid communication with the drain trap; (c) connecting a maintenance assembly inlet of the maintenance assembly to a pressurized liquid source while the electronic valve is in a closed state; (d) transitioning the electronic valve from a closed state to an open state by the electronic control device, thereby allowing liquid to flow from the source through the pipe and the second inlet into the drain trap and impinge on an inner wall of the drain trap to clean the wall of the drain trap.

[0178] Embodiment 63: 63. The method of embodiment 62, further comprising: (e) maintaining the electronic valve open for a predetermined period of time sufficient to exchange any liquid in the drain trap.

[0179] Embodiment 64: The method of embodiment 62 or embodiment 63, wherein the transition is in response to the electronic control device receiving an input indicating a need for the transition.

[0180] Embodiment 65: The method of embodiment 64, wherein the input is received from a sensor positioned within or near the drain trap.

[0181] Embodiment 66: The method of embodiment 64, wherein the input is received from a remote control device via a communication interface functionally associated with the electronic control device.

[0182] Embodiment 67: The method described in embodiment 62 or embodiment 63, wherein the electronic control device includes a programmable electronic control device, and the method further includes programming the programmable electronic control device to perform a transition step at least one predetermined period or at a predetermined frequency prior to the transition.

[0183] Embodiment 68: The method of any one of embodiments 62 to 67, wherein connecting the maintenance assembly outlet to the second inlet of the drain trap comprises directly connecting the maintenance assembly outlet to the second inlet.

[0184] Single Embodiment. Conversely, various features of the invention which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable subcombination.

[0185] Although the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations thereof will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims. All publications, patents, and patent applications described in this specification are incorporated herein by reference in their entirety to the same extent as if each individual publication, patent, or patent application was specifically and individually indicated to be incorporated herein by reference. Furthermore, citation or identification of any reference in this application should not be construed as an admission that such reference is available as prior art to the present invention.

Claims

1. A drain cleaning and maintenance system, (a) A drain trap having a first inlet that is in fluid communication with the drain of a piping device, (b) A second inlet that is in fluid communication with the drain trap, (c) A cleaning and maintenance assembly having fluid communication with the second inlet, wherein the cleaning and maintenance assembly is (i) A maintenance assembly inlet that is in fluid communication with a pressurized liquid supply source, (ii) A maintenance assembly outlet that is in fluid communication with the inside of the drain trap, (iii) A pipe positioned between the maintenance assembly inlet and the maintenance assembly outlet, (iv) An electronic valve having an open state that allows liquid to flow through the pipe from the maintenance assembly inlet to the maintenance assembly outlet, and a closed state that blocks the liquid flow from the maintenance assembly inlet to the maintenance assembly outlet, (v) an electronic control device configured to move the electronic valve between the open state and the closed state, (vi) A power supply for supplying power to the electronic control device and the electronic valve, (vii) A nozzle including a nozzle inlet and a plurality of nozzle outlets, wherein the plurality of nozzle outlets are oriented in a plurality of directions with respect to the nozzle inlet, and the nozzle is located in a flow path from the maintenance assembly outlet to the drain trap, A cleaning and maintenance assembly, A drain cleaning and maintenance system comprising: A drain cleaning and maintenance system wherein, when the electronic valve is in the open state, liquid flows from the pressurized liquid supply source through the nozzle inlet to the drain trap via the electronic valve, and is redirected into the drain trap from the plurality of nozzle outlets so as to collide with the drain trap in multiple directions.

2. The drain cleaning and maintenance system according to claim 1, comprising a one-way valve positioned upstream of the drain trap and adapted to be positioned between the drain trap and the drain inlet of a piping fixture drained by the drain trap when the drain trap is installed, wherein the one-way valve is adapted to be opened and normally closed by the pressure applied to the one-way valve by the liquid draining into the one-way valve, and when the one-way valve is closed, the one-way valve blocks the outflow of fluid from the drain trap, thereby preventing backflow of bacteria and / or contaminated aerosols from the drain trap.

3. The drain cleaning and maintenance system according to claim 1, wherein the maintenance assembly inlet is connected to the pressurized liquid supply source, and when the electronic valve is in the open state, the absolute output pressure of the liquid flowing from the maintenance assembly outlet is at least 70% of the absolute input pressure of the liquid when the liquid flows into the maintenance assembly inlet.

4. The drain cleaning and maintenance system according to any one of claims 1 to 3, wherein the maintenance assembly inlet is connected to the pressurized liquid supply source, and when the electronic valve is in the open state, the absolute pressure of the liquid flowing into the maintenance assembly inlet is at least 2 bar.

5. The drain cleaning and maintenance system according to any one of claims 1 to 4, wherein the electronic control device is adapted to keep the electronic valve open for a period of time sufficient for the flow of pressurized liquid from the pressurized supply source to the drain trap to replace at least a large portion of the liquid in the drain trap.

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