Vehicle restroom sink assembly

Abstract

A vehicle restroom monument assembly includes an enclosure having first, second, third, and fourth walls that cooperate to define a restroom interior, an entry door disposed on the second wall, and a sink assembly located within the restroom interior. The sink assembly includes a sink including a back wall, a top wall, a bottom wall, a first side wall, and a second side wall that cooperate to define a sink interior. The top wall includes a top surface and a bottom surface, the bottom surface partially defines the sink interior, and the top surface is a counter.

Description

[Technical Field]

[0001]

[0001] The present invention relates generally to clean restrooms for aircraft or other vehicles. [Background technology]

[0002]

[0002] Commercial airline operations have been disrupted by the Covid 19 crisis. As a result, there is a desire to develop and deploy technologies, products, and solutions that clean, sanitize, disinfect, or even sterilize aircraft interiors before, during, or after flight. As used herein, "cleaning" means cleaning, disinfecting, sterilizing, refilling, or any combination thereof.

[0003]

[0003] Aircraft operating in commercial service must be fuel efficient and safe to fly. Aircraft manufacturers, suppliers, and government regulators, such as the FAA, develop procedures, regulations, processes, and requirements to ensure that products introduced into aircraft are safe, meet requirements and regulations, and are lightweight, low power, and compact in volume.

[0004]

[0004] While solutions for cleaning the interior of aircraft have been proposed to airline operators, there remains a need to ensure that these technologies, products, or solutions simultaneously meet industry needs for efficiency and safety. Furthermore, while commercially available products are adapted for use on aircraft, these products may not meet industry requirements to be able to fly or be certified as airborne equipment.

[0005]

[0005] Air in an aircraft cabin is typically recirculated approximately 20 times per hour. Additionally, the fresh air entering the cabin is filtered. This provides a cleaner cabin atmosphere than many other forms of public transportation. However, the lavatory is one area of ​​the cabin where passengers are confined to a small space, and in this space, air is not recirculated as frequently as in an open cabin. This can increase the likelihood of airborne pathogens spreading during air travel. In an attempt to reduce the spread of such pathogens, the air inside the lavatory can be recirculated each time a passenger uses the lavatory.

[0006]

[0006] Bacteria and viruses are killed by ultraviolet (UV) light or disinfection on surfaces that are in the direct "line of sight" of the light emitted by the UV light source. Optimal disinfection occurs when the angle of incidence is 0°, in other words, when the light rays are perpendicular or normal when they leave the lamp and strike the surface. Germicidal effectiveness decreases when the UV rays are at an angle relative to the surface that needs to be disinfected. The effectiveness of UV light decreases as the angle of incidence increases. For reference, disinfection intensity is reduced by approximately 10% at a 20° angle of incidence and approximately 40% at a 30° angle of incidence. In addition, the farther the UV light source is from the surface to be disinfected, the lower the light intensity on the disinfected surface. This reduces disinfection effectiveness. For reference, the intensity of UV-C light is reduced by approximately 95% at a distance of approximately 1 meter from the light source.

[0007]

[0007] The description of the background art disclosed anywhere in this patent application contains information that may be useful in understanding the present invention. None of the information provided herein is an admission that it is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art. Summary of the Invention

[0008] The present invention is directed to a clean restroom that includes one or more features. Generally, a clean restroom addresses passenger hygiene concerns by providing an integrated, touchless solution (e.g., dispensing water and soap / sanitizer), eliminating airborne contaminants on demand (e.g., using an air replenishment system), implementing easy-to-clean surface configurations even when the restroom is occupied, consolidating consumables (e.g., wipes) in one or very few storage areas that are easily accessible from the cabin aisle (or outside the restroom enclosure) to reduce cleaning and restocking challenges for crew, and providing a method of communicating the sanitary status of the restroom to passengers without requiring crew involvement.

[0009] According to one aspect of the present invention, there is provided a vehicle restroom monument assembly including an enclosure having a plurality of walls that cooperate to define a restroom interior together with an entry door disposed on one of the walls and a tower assembly disposed on the one of the walls and extending outwardly therefrom. A sanitizing recess is defined in a front face of the tower assembly, the sanitizing recess including access to hand sanitizer therein. The hand sanitizer may be associated with a liquid or gel dispenser, disinfecting wipes, or the like.

[0010] In a preferred embodiment, the present invention uses a tower assembly having one or more access doors therein to provide a station or tower assembly stocked with and containing hand sanitizer dispensers and / or disinfecting wipes that is directly accessible from the aircraft cabin aisle. The tower assembly preferably provides a hygiene station for passengers that is accessible from the aisle (i.e., outside the lavatory) and also provides passengers with information regarding the cleanliness of the lavatory and steps being taken to keep the lavatory and / or cabin as clean as possible.

[0011]

[0011] In a preferred embodiment, a fixed tower or tower assembly is integrated into or located next to an aircraft monument such as a lavatory or galley. The tower includes, but is not limited to, a contactless hand sanitizer dispenser, a disinfectant wipe dispenser, and / or a trash receptacle. The trash receptacle is located inside the tower and / or inside a trash compartment or trash receptacle space inside the lavatory. The hand sanitizer dispenser and / or disinfectant wipe dispenser are both accessible from the aircraft cabin aisle. The trash compartment is accessible from the lavatory or from the aisle via a trash receptacle in the tower. The trash receptacle is emptied from the aisle side of the tower, thereby reducing the need for flight crew or maintenance personnel to enter the lavatory for maintenance.

[0012] In a preferred embodiment, an access panel or door located on the upper side of the tower provides access to disposable tissue and towel dispensers (all towels, tissues, wipes, etc., sometimes referred to herein as wipes) located and accessible within the restroom, thereby reducing the need for flight crew or maintenance personnel to enter the restroom for maintenance and to change out the wipes.

[0013] In a preferred embodiment, a display panel is located on the exterior of the tower. This display panel communicates status information to the crew and / or passengers using illuminated information or graphics, display screens, or integrated color-coded wash lights. This information can include, but is not limited to, the approximate time the beverage cart will pass through the cabin, cleaning status such as the cleaning method and protocol used in the lavatory, time since the lavatory air was refilled, and service information such as lavatory availability / vacancy. The display screen can include illuminated icons that activate to communicate vacant, occupied, cleaning, in use, etc., or the display screen can be an embedded flat screen display to run informational graphics such as onboard sanitation procedures and techniques, or can include advertising.

[0014]

[0014] Passengers will appreciate that they have access to the hygiene station without having to enter the restroom, as the hygiene products can be accessed from the aisle. In addition, the display screen provides passengers with additional information related to procedures and techniques being used to increase cleanliness within the cabin, which helps to increase passenger confidence in their air travel.

[0015]

[0015] According to one aspect of the present invention, there is provided a restroom monument assembly for a vehicle including an enclosure including a plurality of walls that cooperate to define a restroom interior having an entry door and an entry, a toilet including an outlet disposed within the restroom interior, and an air replenishment system configured to move a first quantity of air from the restroom interior through the outlet and to move a second quantity of air into the restroom interior through the entry.

[0016] In a preferred embodiment, the present invention also provides the ability to remove airborne pathogens after each use of the restroom. The present invention provides the ability to generate airflow using existing or newly generated toilets as air inlets and outlets. The air inlets may be active (forced air from the ECS system) or passive (ventilation openings to the general passenger cabin). The location of the inlets can be customized compared to the prior art. In a preferred embodiment, a toilet dry flush cycle is used to suck or pull air from the restroom to remove airborne pathogens and provide air circulation. The dry flush cycle is used without passengers present and can be customized in flow and duration. Thus, the restroom vacuum system can be reused or used to remove air from the restroom after each use. This provides a fresh air environment for all passengers using the restroom. In a preferred embodiment, an air recirculation or replenishment system inside an aircraft restroom has a cycle time of less than 30 seconds and can communicate the current air quality inside the restroom to passengers or crew.

[0017] In a preferred embodiment, a toilet vacuum system (or a separate vacuum system) is used in dry mode (without water) to draw air from inside the restroom. The opening time of the toilet flush valve (or outlet) is electronically programmed based on the required amount of air to be extracted and the position of one or more inlets. A dry flush of a toilet is a short-duration, high-volume operation that generates a flow of, for example, approximately 150 l / s. This vacuum system can be activated automatically after a passenger leaves the restroom, or it can be activated manually by pressing a button (or otherwise activating a switch) located outside the restroom. Manual activation of the vacuum system is disabled when a person is inside the restroom. In a preferred embodiment, it takes approximately 10 seconds for the vacuum to remove a certain amount of air inside the restroom. It will be understood that the amount of air displaced from the restroom is at least a majority of the air in the restroom. Some air may be extracted or displaced from the toilet outlet during a regular flush (a typical aircraft toilet outlet is open for approximately 4 seconds during a normal flush, resulting in some air leaking through the outlet). However, this is not sufficient to clean or replenish the air in the restroom. Therefore, for purposes of this invention, the first volume of air removed from the restroom is at least half the volume of air present in the restroom before activation of the air replenishment system, and may be as much as 100% of the air. A typical volume of an aircraft restroom is approximately 1.1 m3. The airflow at 0°C and 1 atmosphere pressure is approximately 0.117 m3 / sec. Therefore, it should take approximately 10 seconds to completely remove the entire volume of air in the restroom (the first volume of air). This period may be longer in restrooms with larger volumes and shorter in restrooms with smaller volumes. Due to the pressure difference between the inside and outside of the restroom, cabin air enters the restroom through the restroom door decompression vent and / or the ECS inlet (which may be located, for example, behind the mirror). In one embodiment, a HEPA (or other air filter) is placed in the decompression vent to filter the air entering the restroom. An air fragrance cartridge or dispenser may also be placed in the decompression vent to introduce a fresh scent into the air entering the restroom.In another embodiment, the air fragrance cartridge or dispenser may be located in another area of ​​the restroom, such as above the ceiling panel.

[0018] In a preferred embodiment, an indicator outside the restroom communicates the air quality level within the restroom. This indicator or display screen or member may contain information including, but not limited to, the amount of time that has passed since the last air recirculation cycle, an indication of a color such as red indicating that air has not been recirculated since the last time a passenger used the restroom, or green indicating that air has been recirculated since the last time a passenger used the restroom, and / or an indication of the restroom status such as "vacant" or "occupied."

[0019] According to one aspect of the present invention, a vehicle restroom monument assembly is provided, including a housing having a plurality of walls that cooperate to define a restroom interior, an entry door disposed on one of the plurality of walls, and a UV disinfection system including a first light module disposed inside the restroom. The first light module includes an ultraviolet light source that emits ultraviolet light and a lens element. The UV disinfection system includes a first reflective surface that includes a reflective coating thereon, a first direct surface to be disinfected, and a first indirect surface to be disinfected. The lens element is configured to direct ultraviolet light toward the first direct surface to be disinfected. The lens element is also configured to direct ultraviolet light toward the first reflective surface, and the first reflective surface is angled to direct the ultraviolet light toward the first indirect surface to be disinfected. If the indirect surface to be disinfected is flat, preferably the ultraviolet light reflected from the first reflective surface reaches the first indirect surface to be disinfected at an angle between 30° and 90°, more preferably between 60° and 90°, and most preferably between 75° and 90°. These same angle ranges apply to the light beam directed at the direct surface to be disinfected.

[0019]

[0020] In a preferred embodiment, the UV disinfection system includes a controller configured to activate the UV disinfection system a predetermined number of seconds after the restroom interior is emptied. In a preferred embodiment, the UV disinfection system includes a controller configured to activate the UV disinfection system a predetermined amount of time after the previous activation of the UV disinfection system. In another embodiment, the UV disinfection system, or at least certain lights therein, may be activated while a person is in the restroom. For example, a sink may be UV disinfected while a person is using the toilet. Sensors may be provided to determine the passenger's position within the restroom and determine which light modules in the system can be activated.

[0020]

[0021] In preferred embodiments, a first reflective surface is disposed adjacent to a non-reflective surface. In some embodiments, the first reflective surface is not parallel to the non-reflective surface. In preferred embodiments, the lens element includes a first portion having a first thickness and a second portion having a second thickness. The first portion is configured to direct ultraviolet light toward the first direct surface to be disinfected, and the second portion is configured to direct ultraviolet light toward the first reflective surface (the light may be directed at different angles relative to the direct and indirect surfaces to be disinfected).

[0021]

[0022] In a preferred embodiment, the UV disinfection system includes a manual activation switch configured to activate the UV disinfection system located outside the restroom interior (e.g., outside the entry door). Preferably, the manual activation switch is part of an activation assembly that includes an indication system configured to indicate the UV disinfection status of the restroom interior. In a preferred embodiment, the indication system includes a plurality of indicator lights having a first indication state and a second indication state. The first indication state indicates that the passenger compartment is clean and the second indication state indicates that the passenger compartment is not clean. In a preferred embodiment, the manual activation switch is disabled when the entry door is locked and the restroom interior is occupied, and / or the manual activation switch is disabled.

[0022]

[0023] In a preferred embodiment, the present invention includes a UV disinfection system for providing UV light disinfection to at least some of the surfaces inside an aircraft and / or restroom. For example, the UV light may be FUV (222 nm wavelength), UV-C, UV-B, or the like. It will be appreciated that the areas of a restroom with the most touch points are the door handles, the areas around the sink and countertop, including the faucet, soap dispenser, and waste flap, and certain areas associated with the toilet bowl and toilet shroud, such as flush buttons, seat cover dispensers, seats, and covers. Areas with a high number of touch points increase the likelihood of pathogen spread in these areas and therefore require more attention for sanitization to reduce the risk of pathogen spread. Therefore, application of UV light to these high-touch surfaces can help sanitize the surfaces and reduce the risk of transmission of viruses, etc.

[0023]

[0024] Furthermore, surface films or coatings applied to surfaces in restrooms can reflect approximately 95% of the UV light that strikes the coated surface. Therefore, one solution is to position UV lamps or light sources so that their light rays are directed perpendicular to and as close as possible to the high-risk surfaces. However, this may not be feasible for several reasons, including cost and power considerations. Therefore, the present invention positions UV lamps as close to the high-risk surfaces as feasible, modifies the effective angle with the UV lamp lens geometry (e.g., refracts the light rays), and uses UV-reflective surfaces to direct the UV light to the high-risk surfaces as efficiently as possible, maximizing its disinfection potential. Generally, the present invention provides a disinfection system that rapidly kills pathogens on high-risk surfaces in restrooms in a manner that ensures the desired surfaces are disinfected after each passenger use.

[0024]

[0025] In a preferred embodiment, a UV light source is placed under the restroom mirror to disinfect the sink and countertop area. The UV light source includes a lens that can direct UV light as desired to the specific surface to be disinfected. The lens can include sections of various thicknesses to redirect or angle the light. The lens cover directs the UV light waves or rays (e.g., via refraction) in a specific direction and angle (sometimes referred to herein as the "effective angle"). At least a portion of the surfaces of the restroom sink and countertop are coated with a UV-reflective material. Thus, when UV light strikes these surfaces, a portion of the UV light is reflected at an angle perpendicular to the UV-reflective surface, referred to herein as the "reflection angle." UV reflection can be achieved using a mirror. The effective angle and reflection angle of the system are configured so that the UV light from the UV light source strikes a specific target within the restroom.

[0025]

[0026] These targets include, but are not limited to, countertop surfaces, specifically around the sink perimeter and waste flap perimeter, the surface of the waste flap, surfaces within the sink bowl, surfaces of the sink faucet and handle, including the underside of the faucet and handle, surfaces of the soap dispenser, including the underside of the soap dispenser, surfaces surrounding the paper towel / wipe / tissue dispenser, and surfaces of interior door handles, including the underside of the door handle.

[0026]

[0027] In a preferred embodiment, one or more UV light sources can be positioned under a baby changing table, on one or more of the restroom walls under a shroud or cover, under a seat cover dispenser, and / or under a toilet shroud in the restroom. The UV light source includes a lens cover of various thicknesses that directs UV light waves in a specific direction and angle, i.e., the effective angle. Surfaces around the restroom toilet seat are coated with a UV-reflective material. These surfaces can include, but are not limited to, the walls surrounding the toilet seat, the restroom floor pan, the toilet shroud, and / or the toilet bowl. When UV light strikes these surfaces, a portion of the UV light is reflected at an angle perpendicular to the UV-reflective surface, which may be referred to herein as the reflection angle. The effective angle and reflection angle of the system are configured to ensure that UV light from the UV light source strikes a specific target within the restroom. The toilet geometry can be modified to ensure that UV light strikes the target surface, or enclosures, reflective surfaces, panels, etc. can be added to the restroom walls or other components and coated with a UV-reflective material to provide the required reflection angle.

[0027]

[0028] Other targets may include, but are not limited to, the surface of the toilet flush button, the surface surrounding the seat cover dispenser, all surfaces of the toilet paper dispenser including the underside of the dispenser, and the surface of the toilet lid.

[0028]

[0029] The present invention includes a compact, broad-spectrum UV lamp. As discussed above, the effectiveness of these lamps is affected by the geometry of the lens on the lamp, particularly by varying the thickness of the lens. The UV lamp is preferably located in an inconspicuous location in the restroom.

[0029]

[0030] The present invention also includes UV-reflective materials that can be applied to certain reflective surfaces in restrooms (thus providing a reflective surface and a non-reflective surface that does not include a coating thereon). These UV-reflective surfaces direct UV light so that it strikes restroom surfaces with numerous passenger touchpoints, which are the surfaces most involved in the spread of pathogens between passengers. It will be appreciated that light disinfects faster when it is closer (indirectly or directly) to the surface being disinfected. Light disinfects faster when it is aimed directly at the site of infection (like a spotlight: it moves to the side and the light quickly fades). The longer the light illuminates the surface, the more energy is absorbed by the microorganisms, resulting in a more complete disinfection. Approximately one minute of UV light on a surface about 20 inches from the light source provides greater than 99.9% disinfection, while approximately 10 minutes of UV light on a surface about 20 inches from the light source provides greater than 99.999% disinfection.

[0030]

[0031] The combination of a broad-spectrum UV lamp and a UV-reflective surface creates a UV disinfection solution that maximizes surface cleaning speed and effectiveness in an automated manner. One key success factor in this invention is the UV lamp form factor, which fits under restroom mirrors and / or other inconspicuous locations, and the variable-thickness light lens, which provides a focused effective angle. A second key success factor is the application of UV-reflective materials to restroom surfaces, which allows UV light to be directed at targets that are typically not within the line of sight of the UV light source, such as under faucet handles or doorknobs. Combining these two success factors creates an automated UV disinfection system that achieves cleaning effectiveness. This is achieved by placing the UV light source close to the target cleaning surface and orienting the UV light by optical reflection so that the light wave direction is as close as possible to the normal to the target cleaning surface. These factors increase the amount of energy transferred for disinfection and impact on pathogens on the target surface. This reduces the amount of time the target surface needs to be exposed to UV light for disinfection.

[0031]

[0032] The present invention also allows the disinfection process to be automated, so that maintenance personnel do not need to use UV wands or apply disinfectant chemicals to target surfaces to be disinfected. For example, the UV disinfection system can be activated at predetermined times or after each use of the restroom (similar to the air replenishment system discussed herein). In a preferred embodiment, both the air replenishment system and the UV disinfection system are activated after each use of the restroom. In a preferred embodiment, the UV disinfection system can be activated using a manual activation button / switch as described herein. It will be understood that automated UV disinfection systems and processes can be tuned for high levels of performance or disinfection, and that manual maintenance items such as wands and sprays depend on staff training and discipline, have variable results, and may be much less effective than expected. Preferably, the UV disinfection system is configured not to be activated or to not activate ultraviolet light when people are present in the restroom (e.g., when the door is locked or when people are detected inside the restroom). In one embodiment, the UV disinfection system may not include indirect surfaces to be disinfected.

[0032]

[0033] In preferred embodiments, the aircraft restroom monument assembly also provides for optimization of aircraft restroom cleanliness by reducing factors that typically contribute to uncleanliness, such as parting lines between adjacent components, horizontal surfaces near sinks that allow water to accumulate, and the presence of objects that extend perpendicularly from horizontal surfaces, such as soap dispensers and faucets, that make cleaning around these objects difficult.

[0033]

[0034] According to one aspect of the present invention, there is provided a vehicle restroom monument assembly including a housing having first, second, third, and fourth walls that cooperate to define a restroom interior, an entry door disposed on the second wall, and a sink assembly disposed within the restroom interior. The sink assembly includes a sink including a rear wall, a top wall, a bottom wall, a first side wall, and a second side wall that cooperate to define the sink interior. The top wall includes an upper surface and a bottom surface, and the bottom surface partially defines the sink interior. The upper surface is a counter.

[0034]

[0035] In a preferred embodiment, a sink including a generally vertically oriented spout or opening for a user to place their hands replaces a conventional sink bowl that is generally horizontally oriented. The sink's geometry prevents water from collecting on a horizontal surface (such as a typical countertop located adjacent to the sink spout) and helps gravity push the water through a drain at the bottom of the sink. The sink also preferably has a smaller footprint than a conventional sink bowl and countertop combination, which frees up space in the restroom. In a preferred embodiment, the leading edge of the sink is shaped to provide a handle for passenger stability during turbulence.

[0035]

[0036] In a preferred embodiment, the restroom monument assembly also includes a "drying shelf" positioned above the sink. Personal items such as cell phones and cosmetics can be placed on this dry shelf, which stays dry because all liquids remain contained within the sink below the dry shelf. In a preferred embodiment, touchless water and soap dispensers are also included within or below the drying shelf, which are located within or dispensed within the sink. In use, when a user inserts their hand into the sink and places it under the touchless water dispenser, the presence of the hand is captured by a motion sensor, IR distance sensor, or other technology used to activate the touchless device. When the water dispenser is activated, water flows from the dispenser. When a user inserts their hand into the sink and places it under the touchless soap dispenser, the presence of the hand is captured by a motion sensor, IR distance sensor, or other technology used to activate the touchless device. When the soap dispenser is activated, soap flows from the dispenser.

[0036]

[0037] In a preferred embodiment, a UV disinfecting light is located in and / or below the drying cabinet and is activated when hands are not present in the sink or when otherwise activated (e.g., by a switch, system, etc.). This UV light disinfects surfaces within the sink.

[0037]

[0038] In preferred embodiments, there are few visible fasteners on the exposed surfaces of the sink or drying rack, which allows the exposed surfaces of the sink and drying rack to be easily cleaned by crew or maintenance personnel. Preferably, the sink or cistern and drying rack are removable using concealed fasteners.

[0038]

[0039] In preferred embodiments, the sink requires little or no hand contact with any surfaces during use, is easy to wipe clean, and its components are easily removable for intensive cleaning, maintenance, or replacement. It will be appreciated that the enclosed nature of the design means that potentially damaging UV virus destruction technology can be focused where it is most effective and least harmful (since prolonged exposure can cause skin damage). The over / under arrangement of wet and dry zones (e.g., drying shelves above the sink) makes it more difficult for furnishings to infiltrate the restroom space, reducing the risk of passengers coming into contact with adjacent, potentially unsanitary surfaces.

[0039]

[0040] The sink isolates the restroom's hand-washing functions within a clean environment, embedding typically hard-to-clean equipment (such as faucets and soap dispensers) within easy-to-clean wiping surfaces (within the drying cabinet), and enabling the safe integration of active and passive biocidal technologies. Preferably, easy deep-clean maintenance is enabled by making all major contact surfaces quickly removable without the need to disconnect system interfaces. However, this is not a limitation of the invention.

[0040]

[0041] According to one aspect of the present invention, there is provided a vehicle restroom monument assembly including: an enclosure having a plurality of walls that cooperate to define a restroom interior; a door disposed on one of the plurality of walls; and a first component disposed inside the restroom, the first component including a first visual indicator coating on an exterior surface thereof. The first visual indicator coating includes at least a first excitation additive configured to illuminate when illuminated by first light comprising light waves within a predetermined wavelength range. Preferably, the predetermined wavelength range is within the ultraviolet range. The range may be the entire ultraviolet range or a subset thereof.

[0041]

[0042] According to another aspect of the present invention, there is provided a method for sterilizing a component, comprising covering at least a portion of an outer surface of the component with a first visual indicator coating. The first visual indicator coating comprises at least a first excitation additive configured to illuminate when irradiated with first light comprising light waves within a predetermined wavelength range. The method also comprises directing an ultraviolet light source toward the outer surface of the first visual indicator coating such that the first excitation additive is illuminated at a first level, thereby sterilizing the outer surface of the first visual indicator coating. In a preferred embodiment, the first excitation additive is a first fluorescent additive, and the method further comprises bringing the ultraviolet light source closer to the outer surface of the first visual indicator coating such that the first excitation additive is illuminated at a second level brighter than the first level.

[0042]

[0043] In a preferred embodiment, the present invention includes a disinfection system that includes both active and passive disinfection methods. Passive disinfection can be achieved by adding antimicrobial coatings, films, etc. to surfaces in the restroom. Active disinfection can include using UV wands or light to disinfect surfaces. UV disinfection can be performed by the crew between flights or at other predetermined times. UV disinfection can also be performed automatically at predetermined intervals during flight or after each use of the restroom using the UV disinfection system described herein. The present invention includes disinfecting aircraft restrooms using antimicrobial additives in coatings or films applied to surfaces most likely to be touched by passengers. In this invention, "passive" refers to a visual indicator, not an antimicrobial effect. Passive indication is a luminescent visual indicator that a part has been disinfected. This is passive in that the spot absorbs UV light and retains a visual indication (glow / colored light / hologram) that the part is protected as long as the energy is in the material. Active is an indicator that a part has UV wand or light energy directed at the surface. The glow is only visible with focused light energy. Passive generally refers to where no further action is required from the user to provide a clean / sanitized / germicide surface. "Continuously active" is a phrase used by the Environmental Protection Agency for these types of materials, but will be understood by those skilled in the art to indicate that the antimicrobial agent is always effective beyond the initial application.

[0043]

[0044] It will be appreciated that there are several mechanisms that can be used to destroy and disintegrate bacterial, viral, and fungal organisms and prevent them from multiplying on board an aircraft. Generally, these mechanisms for destroying and disintegrating bacterial, viral, and fungal organisms and preventing them from multiplying on board an aircraft are referred to herein as "disinfecting" or "cleaning."

[0044]

[0045] Electrical / polar attraction is the addition of a conductive material (e.g., silver and copper are common) with an ionic charge that attracts and destroys microbial activity. This form of passive disinfection is sometimes referred to herein as "conductive disinfection," and the material is sometimes referred to herein as a "conductive disinfectant." Another method involves mechanical disruption, where the surface or additive has a rough surface topography. Microorganisms have a difficult time adhering to rough or uneven surfaces to form colonies, and the roughness can also be rough enough to rupture or destroy cell membranes, killing bacteria and disrupting viral growth. This form of passive disinfection is sometimes referred to herein as "mechanical disruption disinfection," and the material is sometimes referred to herein as a "mechanical disruption disinfectant."

[0046] UV radiation can also be used, as specific wavelengths can focus on cell walls, rupturing them and rendering bacteria, germ cells, or viruses harmless. This form of "enhanced" sanitization may be referred to herein as "UV disinfection," and the materials may be referred to herein as "UV sanitizers." This requires some skill or technique in operation to ensure proper sanitization occurs, and the entire surface is efficiently disinfected.

[0045]

[0047] With respect to methods in which sanitization is achieved by surface topography, chemical, electrical attraction, or mechanical means, those skilled in the art will understand that for these methods discussed herein, it is difficult to determine how effective an antimicrobial additive is in performing its task of killing microorganisms, and it is also difficult to determine whether the antimicrobial additive is still present on the surface to be cleaned. For example, in the case of electrical or chemical means, the additive is distributed evenly throughout the medium without operator intervention or skill to ensure effectiveness, but there is no visual or mechanical proof that the material is active and working. With respect to surface topography or other mechanical means, the surface accomplishes the task without operator intervention, and it cannot be determined that it is still effective unless the surface is examined on a microscopic scale.

[0046]

[0048] The present invention involves the addition of additives or dyes in disinfecting coatings or films that luminesce or illuminate when irradiated with light of a specific range of wavelengths. The luminescence provides a visual indication of disinfection. The additives can be fluorescent and / or phosphorescent dyes, defined by the wavelength of UV or laser energy used to create the desired response. Both fluorescence and phosphorescence are based on the ability of a substance to absorb light and emit longer wavelength, and therefore lower energy, light. The main difference is the time it takes to do so. With fluorescence, the luminescence is essentially instantaneous and therefore usually only visible if the light source (such as UV light) is continuously on, whereas phosphorescent materials can store the absorbed light energy for a period of time and later emit the light, resulting in an afterglow that persists even after the light is turned off.

[0047]

[0049] In other words, fluorescent dyes provide an immediate response and fade rapidly when the energy source (UV light or laser) is removed. Phosphorescent dyes provide a sustained duration response based on the amount of energy absorbed and the desired energy decay response. The illumination response can last from 5 seconds to several hours. Fluorescent and / or phosphorescent dyes or additives may be generally referred to herein as "excitation additives."

[0048]

[0050] The excited additives bind or are bound to the antimicrobial additives in the disinfecting coating / film. The excited additives provide visual feedback (when they fluoresce) indicating the presence of the antimicrobial additive to which they are bound. Several methods can be used to chemically bind the excited additives to the various types of microbial disabling agents in the various disinfectants and disinfection systems described above.

[0049]

[0051] To add fluorescent or phosphorescent additives or dyes to ionic or nanoparticulate silver additives (conductive disinfectants), a coating can be provided on the particles to enhance their ionic state, stabilize them, and provide long-term protection. The dye chemistry can be tailored to separate from the silver particles and bind to the outer shell of the coating, revealing a distinct color or watermark on the particles when illuminated by UV or other light. This provides an ionic or nanoparticulate silver additive for disinfection that includes a coating coated on the conductive disinfectant and has a dye attached to it.

[0050]

[0052] Mechanically disruptive disinfectants often contain ceramic microspheres or quaternary ammonium compounds to affect the surface. Dyes can be used to coat ceramics without altering or destroying the topography.

[0051]

[0053] The dye can provide feedback that the light is properly focused, along with a visual indication that the surface illumination is properly applied, so that UV disinfection or sterilization can be effective. The intensity or color can be a visual indicator.

[0052]

[0054] Exemplary formulations of the excitation additive include SrAl2O4 + Eu, Dy and / or SrAl14O25 + Eu, Dy. Grades can be Lightonic Yellow (520 nm excitation energy) and Lightonic Blue (490 nm excitation energy). The excitation additive may not be directly bonded to the antimicrobial additive, but rather dispersed throughout the coating or resin containing the antimicrobial additive. One purpose of including the excitation additive is to ensure that the coating remains on the surface of the part, or is still active, and has not worn off the panel surface. Since the antimicrobial agent is also dispersed throughout the coating, film, or resin, the excitation additive does not need to be in immediate contact with the antimicrobial agent.

[0053]

[0055] It will be appreciated that the visual feedback provided by the activated additive allows for one or more of the following: 1) a visual indication of "high priority areas" that require longer disinfection times when using a UV wand to disinfect a surface; 2) a visual indication that the antimicrobial additive is still present and active; and 3) a visual indication that the surface has recently been disinfected with UV light. For category 2 above, the antimicrobial additive in the film may degrade over time or not function as well. Thus, the activated additive may not illuminate or may illuminate below a predetermined threshold (i.e., weakly), thus informing the airline that a new film needs to be applied.

[0054]

[0056] The present invention provides flight attendants and / or cleaning crews with a way to visualize the progress made in cleaning surfaces with UV light. The spread of light over the surface area and the application time required for UV light to be effective in killing microorganisms can be better controlled with a way to measure progress. Alternatively, if ultraviolet light is used as a means of disinfecting in restrooms between passenger occupancies, a change in the visual appearance of the film (e.g., coloration) can also be used as a way to indicate to passengers which surfaces have been recently cleaned.

[0055]

[0057] For example, fluorescent dyes are used to indicate where the light energy is directed. The stronger the excitation or fluorescent response when the light is directed at a surface, the stronger the UV light and the better the level of disinfection. Bright or strong excitation results in less disinfection, while weak excitation results in less disinfection. Preferably, the phosphorescent dye is on a marker or prominent area of ​​the component (e.g., toilet seat) so that a technician or passenger has a good indication that the material has been affected and disinfected.

[0056]

[0058] In a first preferred embodiment, a uniform UV-fluorescent additive is added to the antimicrobial coating or film. In a preferred embodiment, the UV-fluorescent additive binds to the antimicrobial additive via ionic or mechanically disruptive chemical bonding to the antimicrobial additive. In another preferred embodiment, when the surface is exposed to black light or UV light, the UV-fluorescent additive illuminates with a cobalt blue, green, red (or other desired) color. This indicates to flight crew or maintenance personnel that the antimicrobial additive is still present and fulfilling its purpose of eliminating pathogens. If the surface does not illuminate the predetermined color (or illuminates below a predetermined threshold), this indicates that the antimicrobial additive is no longer present (or is present below a predetermined threshold).

[0057]

[0059] In another preferred embodiment, a first group of UV fluorescent additives, each having a characteristic of emitting a specific color when exposed to UV light due to the irradiance and half-life characteristics of the UV fluorescent additive, is added to a specific region of the antimicrobial film. Additionally, a second group of UV fluorescent additives, each having a characteristic of emitting a different color than the first group of UV fluorescent additives, is added to a different region of the antimicrobial film from the first group of UV fluorescent additives. In one embodiment, an additional group of UV fluorescent additives, each having a different illumination color characteristic than the first or second group of UV fluorescent additives, can be added to a region of the antimicrobial film where the first or second group of UV fluorescent additives are not present. When a surface covered by the antimicrobial film is exposed to UV light, such as UV light from a UV disinfection wand, the UV fluorescent additive emits a color determined by the UV fluorescent additive's characteristics, such as irradiance and half-life. Surfaces containing a first group of UV-fluorescent additives will emit one color (first color), surfaces containing a second group of UV-fluorescent additives will emit a color (second color) different from the first group of UV-fluorescent additives, and if additional UV-fluorescent groups are present in the antimicrobial film, surfaces containing additional groups of UV-fluorescent additives will emit a color (third or more) different from the other groups of UV-fluorescent additives. The first color can indicate high-contact areas requiring longer disinfection time than areas with the second color, which are lower-contact areas. In use, areas of a surface requiring additional disinfection time can be visually indicated to flight crew or maintenance personnel. Areas requiring additional disinfection time will illuminate one color when exposed to the UV light of the UV disinfection wand, while areas requiring less disinfection will illuminate a different color when exposed to the UV light of the UV disinfection wand.

[0058]

[0060] In a preferred embodiment, two technologies are combined: phosphorescent and fluorescent dyes. As mentioned above, the UV fluorescent dyes immediately emit light, indicating that a directional disinfecting UV wand or light is properly aimed at the panel. The phosphorescent dyes absorb the photons of light and remain "lit," "illuminated," or "excited," or may light up as a marker or confidence builder for crew or passengers indicating that the surface has recently been cleaned or disinfected.

[0059]

[0061] A toilet seat inside a restroom is used as an example. When in use, the crew (or the automated UV disinfection system discussed herein) broadcasts UV light onto the surface of the seat, disinfecting and eliminating microorganisms from the surface. Because UV light is invisible to the naked eye, the glowing surface treatment allows a technician (if present, or during an automated system maintenance cycle, ensuring that a UV lamp or directional light is properly focused on the surface) to verify where they directed the light and cleaned the surface. The phosphorescent dye remains illuminated for a longer period of time, allowing passengers entering the restroom after treatment to see and know that the seat surface has been cleaned or disinfected and is safe.

[0060]

[0062] In another embodiment, additives with UV energy absorbing properties are added to the antimicrobial surface in a specific and / or predetermined pattern. In a preferred embodiment, the method for applying these additives in a specific pattern can be inkjet printing. However, this is not limiting, and the pattern can be created by other methods. When a surface containing the additive is exposed to UV light, the additive becomes energized and emits visible light until the energy dissipates. This provides a visual indication to flight crew, maintenance personnel, and / or passengers when the surface has recently been cleaned using UV light. If the predetermined pattern on the surface emits light, this indicates that the surface has recently been cleaned. For example, the predetermined pattern can be a word such as "SANITIZED," or it can be a logo, emblem, or other visual indicator.

[0061]

[0063] In a preferred embodiment, the activating or phosphorescent additive can be added to the coating using an inkjet printer or the like. The surface indicator or coating can be a clean thin film that can be passed through an inkjet printer that includes or contains a dye or activating additive. The printer prints a predetermined pattern or design on the film. When the film is placed on a component (e.g., a toilet seat, a counter, etc.), the inkjet-added image or predetermined pattern is now an indicator for disinfection verification. [Brief explanation of the drawings]

[0062]

[0064] The present invention may be more readily understood by reference to the accompanying drawings. [Figure 1] FIG. 1 is a perspective view of a restroom monument assembly according to a preferred embodiment of the present invention. [Figure 2] FIG. 2 is a partial exploded view of the restroom monument assembly of FIG. 1. [Figure 3] FIG. 2 is a side view of the restroom monument assembly of FIG. 1. [Figure 4] FIG. 2 is a front view of the tower assembly. [Figure 5] FIG. 2 is a top perspective view of the sink assembly. [Figure 6] FIG. 2 is a bottom perspective view of the sink assembly. [Figure 7] FIG. 2 is an exploded perspective view of the sink assembly and other components. [Figure 8] FIG. 2 is a top cross-sectional view of the restroom monument assembly of FIG. 1. [Figure 9] FIG. 2 is a perspective view of the restroom monument assembly of FIG. 1 with a wall removed. [Figure 10] FIG. [Figure 11] FIG. 1 is a front view of the initiation assembly. [Figure 12] 4 is a flow chart illustrating exemplary steps of an air replenishment system. [Figure 13]4 is a flow chart illustrating exemplary steps of an air replenishment system. [Figure 14] FIG. 1 is a perspective view of a lighting assembly. [Figure 15] FIG. 2 is an exploded perspective view of the lighting assembly. [Figure 16] FIG. 2 is a cross-sectional view of an optical assembly. [Figure 17] FIG. 1 is a perspective view of a light assembly as part of a UV disinfection system. [Figure 17A] FIG. 18 is a schematic diagram illustrating an exemplary reflective surface from the UV disinfection system of FIG. [Figure 17B] 18 is a schematic diagram illustrating an exemplary reflective surface covered with a transparent material from the UV disinfection system of FIG. [Figure 18] FIG. 1 is a top view of a toilet and shroud including a coating including an energizing additive. [Figure 19] FIG. 1 is a perspective view of a restroom monument assembly showing a toilet having two coatings thereon, each with a different color-exciting additive.

[0063]

[0086] Like numbers refer to like parts throughout the several views of the drawings. DETAILED DESCRIPTION OF THE INVENTION

[0064]

[0087] The following description and drawings are illustrative and should not be construed as limiting. Numerous specific details are set forth to provide a thorough understanding of the present disclosure. However, in some instances, well-known or conventional details are not described to avoid obscuring the description. References to one or an embodiment in this disclosure do not necessarily refer exclusively to the same embodiment, but such references may imply at least one embodiment. If a component is not shown in the drawings, this provides support for a negative limitation in a claim stating that the component is "absent." However, the above description is not limiting, and in alternative embodiments, the missing component may be included in a claimed embodiment.

[0065]

[0088] As used herein, reference to "one embodiment," "one embodiment," "preferred embodiment," or any other phrase referring to the word "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present disclosure. It also means that any particular feature, structure, or characteristic described in connection with one embodiment may be included in, or omitted or excluded from, any embodiment. The appearance of the phrase "in one embodiment" in various places in the description does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Furthermore, various features are described that may be exhibited by some embodiments and not by other embodiments, or that may be omitted from any embodiment. Furthermore, any particular feature, structure, or characteristic described herein may be optional. Similarly, various requirements are described that are requirements for some embodiments but not for other embodiments. Where appropriate, any of the features discussed herein with respect to one aspect or embodiment of the invention may also be applied to other aspects or embodiments of the invention. Similarly, where appropriate, any of the features discussed herein with respect to one aspect or embodiment of the invention may be optional with respect to and / or omitted from that aspect or embodiment of the invention or any other aspect or embodiment of the invention discussed or disclosed herein.

[0066]

[0089] The terms used in this specification generally have their ordinary meaning in the art in the context of this disclosure and in the specific context in which each term is used.The specific terms used to describe this disclosure are discussed below or elsewhere in this specification, and provide practitioners with additional guidance regarding the description of this disclosure.For convenience, certain terms can be highlighted, for example, by using italics and / or quotation marks.The use of highlighting does not affect the scope and meaning of the term.The scope and meaning of a term are the same in the same context, regardless of whether it is highlighted or not.

[0067]

[0090] It will be understood that the same thing can be said in more than one way. Consequently, alternative language and synonyms may be used for one or more of the terms discussed herein. Whether a term is recited or discussed herein is of no particular significance. Synonyms for a term are provided. The listing of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification, including examples of any term discussed herein, is illustrative only and is not intended to further limit the scope and meaning of the disclosure or any exemplified term. Similarly, the disclosure is not limited to the various embodiments provided herein.

[0068]

[0091] Without intending to further limit the scope of the present disclosure, examples of instruments, devices, methods, and their related results according to embodiments of the present disclosure are provided below. Please note that for the convenience of the reader, titles or subtitles may be used in the embodiments, and this should not limit the scope of the present disclosure in any way. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. In case of conflict, the present document, including definitions, will prevail.

[0069]

[0092] It will be understood that terms such as "front," "rear," "top," "bottom," "side," "short," "long," "up," "down," "rear," "front," "inner," "outer," and "under," when used herein, are for ease of description only and refer to the orientation of the components as shown in the figures. It will be understood that any orientation of the components described herein is within the scope of the present invention.

[0070]

[0093] Referring now to the drawings, which are intended to illustrate, but not limit, the present invention, the drawings show a restroom monument assembly 10. As shown in FIG. 1 , the restroom monument assembly 10 generally includes an enclosure 12 including a plurality of walls (a first wall 14, a second wall 16, a third wall 18, and a fourth wall 20) that cooperate to define a restroom interior 22. The enclosure 12 also includes a floor 24, a ceiling 26, and an entry door 28, which is preferably located on one of the walls. In the figures, the entry door 28 is shown located on the second wall 16; however, this is not a limitation, and the door may be located on any wall.

[0071]

[0094] As shown in FIGS. 1-4 , in a preferred embodiment, the restroom monument assembly 10 includes a tower assembly 30 disposed on the second wall 16 adjacent the entry door 28. In other embodiments, the tower assembly 30 can be disposed on any of the other walls. As shown in FIG. 2 , an access opening 32 (which may be one or more access openings, generally referred to herein as a first access opening) is defined in the second wall 16 (or another wall, if desired), and the tower assembly 30 is disposed in the first access opening 32. It will be understood that the first access opening 32 provides access to the restroom interior 22 when one or more doors in the tower assembly are in the open position.

[0072]

[0095] In a preferred embodiment, the tower assembly 30 includes a frame 33 having a top wall 34, a bottom wall 36, a left side wall 38, and a right side wall 40. The tower assembly also includes a front wall 42 including a front surface 42a. The tower assembly 30 extends outward from the second wall 16 and defines a tower interior 44. Preferably, the tower assembly 30 also includes upper and lower or first and second doors 46 and 48, each movable between an open position and a closed position. Preferably, a sanitizing recess 50 and an external trash recess or opening 52 are defined in the front surface 42a. The sanitizing recess 50 provides a user with access to hand sanitizer, and the external trash opening 52 provides access to or is in communication with a trash receptacle 54 located within a trash receptacle space 56 of the toilet interior 22, thereby allowing someone to place trash in the trash receptacle from outside the toilet. In a preferred embodiment, the sanitizing recess 50 and the external trash opening 52 are located between the first and second doors 46 and 48. However, this is not a limitation, and in alternative embodiments, the sanitizing recess 50 and / or the external waste opening 52 may be located above or below either the first or second door.

[0073]

[0096] As shown in FIG. 2, in a preferred embodiment, the first door 46 provides access to the wipe storage space 58 located at least partially within the restroom interior 22 (and may also be located at least partially within the tower), and the second door 48 provides access to the trash receptacle space 56 located at least partially within the restroom interior 22 (and may also be located at least partially within the tower). In another embodiment, the first door can provide access to both the wipe storage space and the trash receptacle space. As shown in FIG. 2, the wipe storage space 58 can include space for multiple types of wipes 60, such as paper towels, disinfecting wipes, etc., and can include a shelf 62 for placing the wipe receptacles thereon. It will be understood that the first and second doors 46 and 48 provide access to the trash receptacle 54 and the different types of wipes 60 from outside the enclosure / restroom.

[0074]

[0097] 3, one or more wipe dispensing openings 64 are defined in a wiping panel 66 of the restroom interior, and an interior trash opening 68 is also located or defined in a trash bin panel 70 of the restroom interior 22. The wiping panel 66 at least partially defines the wipe storage space 58, and the trash bin panel 70 at least partially defines the trash receptacle space 56.

[0075]

[0098] As shown in FIG. 2, in a preferred embodiment, a first door 46 provides access to a sanitizer dispenser 72 located within the tower assembly 30 configured to dispense hand sanitizer into the sanitizing recess 50. See sanitizer outlet 74 in FIG. 4. The sanitizer dispenser 72 can be located on the door or within a defined space within the tower interior 44. The sanitizer dispenser 72 can dispense liquid hand sanitizer when a user places their hands in the appropriate position within the sanitizing recess 50 (e.g., using a touchless sensor), or the sanitizer dispenser can contain sanitizing wipes that are accessible to a user within the sanitizing recess.

[0076]

[0099] In a preferred embodiment, the tower assembly 30 includes a display screen 76 for providing information to passengers and crew. The display screen 76 may be located anywhere on the tower assembly 30. In a preferred embodiment, the display screen 76 is located on the first door 46. Information provided by the display screen 76 may include, for example, one or more of the following: lavatory occupancy status, sanitization level air status in the lavatory (e.g., how long it has been since the air in the lavatory was last refilled), how long it has been since lavatory surfaces were cleaned, information about sanitization measures taken to keep the lavatory clean, etc.

[0077]

[0100] 4, in a preferred embodiment, both the sanitizing recess 50 and the external dirt opening 52 can include at least one UV light source 78 therein for sanitizing the interior surfaces of the sanitizing recess 50 and / or the external dirt opening 52. In a preferred embodiment, the UV light source can be a light assembly 200, described below, which can include a reflective surface 220, etc., as shown in FIG.

[0078]

[0101] In a preferred embodiment, the tower assembly 30 includes indicator lighting emanating from the tower to indicate to passengers whether the lavatory is in a "refilled" or "unrefilled" state (or "sanitized" or "unsanitized"), as described further below. The indicator lighting may be any or all of the trim lighting around the frame 33, the light emanating from the sanitizing recess 50 or exterior trash opening 52, the color of the display screen 76, or a light 80 located at the top of the tower, which, when the lavatory monument is placed on the aircraft, washes or illuminates the ceiling to provide an indication of the lavatory status from throughout the cabin. The light 80, shown in FIG. 2, is located below the top wall 34 of the tower assembly, which may include a lens or transparent cover 82 therein for transmitting light (see light radiation 80a in FIG. 1).

[0079]

[0102] As a result of the indicator lighting, the tower assembly 30 includes a first indicator state indicating that the air in the restroom interior 22 is in a replenished or sanitized state and a second indicator state indicating that the restroom interior 22 is in an unreplenished or unsanitized state. In short, when the tower assembly 30 emits a selected color, the tower assembly indicates to passengers that the restroom is ready to enter and that the air has recently completed a clean air replenishment (and / or that the restroom has completed a UV sanitization cycle). Any colors for the first and second indicator states are within the scope of the present invention. For example, green or cyan may be used to indicate a replenished, sanitized, or clean state, and red may be used to indicate an unreplenished, unsanitized, or dirty state. In another embodiment, the tower assembly 30 and / or the indicator lighting emitted therefrom may provide two or more indicator states, each with a different color. For example, the tower assembly may indicate that the restroom is occupied or unoccupied, that the restroom requires maintenance, that the trash needs to be emptied, that the restroom occupant requires flight attendant assistance, etc. Thus, if a tower assembly includes five display states, each display state is assigned a different color.

[0080]

[0103] As shown in FIGS. 1-3 and 5-8, in a preferred embodiment, the restroom monument assembly 10 includes a basin or sink assembly 84 disposed within the restroom interior 22. In a preferred embodiment, the sink assembly 84 includes a sink 86 including a rear wall 88, a top wall 90, a bottom wall 92 having a drain 93 therein, a first side wall 94, and a second side wall 96 that cooperate to define a sink interior 98. The top wall 90 includes a top surface 90a and a bottom surface 90b. The bottom surface 90b partially defines the sink interior 98, and the top surface 90a is a counter 100. In a preferred embodiment, the sink 86 includes a mouth 102 or opening through which a user places their hand to enter the generally vertically oriented sink interior 98. In a preferred embodiment, the front end or leading edge of the sink 86 is shaped to provide a handle for passenger stability during turbulence. As shown in the drawings, the leading edges of the bottom wall 92, first side wall 94, and second side wall 96 are thicker than the remainder of the walls and may include handle portions 97 extending therearound that may be grasped by a user when desired.

[0081]

[0104] As shown in FIG. 6, the bottom surface of the top wall 90 is associated with a motion-activated water dispenser 91 (faucet) and a motion-activated soap dispenser 89 that dispenses soap or water when a user places their hands in the appropriate location inside the basin (see icon 95 aligned with the soap and water dispensers in FIG. 6). The dispensers can be located on the bottom surface of the top wall or on a chassis 101, described below. FIG. 6 also shows a UV light source for disinfecting the sink, which can be a light assembly 200 discussed herein. A reflective surface 220 (described further below) can also be included in the sink 86.

[0082]

[0105] FIG. 7 is an exploded view of the sink assembly 84 and related components. In a preferred embodiment, many components are easily removable for deep cleaning. The sink assembly 84 includes a chassis 101 attached to the wall or interior wall 99 of the housing. Water and soap are delivered to the water and soap dispensers 91 and 89. Water may be delivered via a pipe 103 and soap from a soap reservoir 105. However, these are exemplary only, and water and soap can be delivered to the dispensers in any known manner. A container 107 can be located below the drain pipe 93 to deliver water to a storage tank 109 (e.g., a gray storage tank), etc. A toilet paper console 111 can be located below the sink 86 and attached to the trash can panel 70.

[0083]

[0106] As best shown in FIG. 8, in a preferred embodiment, the top wall 90 (and therefore the counter 100) slopes inward from the adjacent entry door 28 toward the third wall 18 (see front surface 90c in FIG. 8). As a result, at least a portion of the leading edge of the bottom wall 92 of the sink 86 extends beyond the leading edge of the top wall 90. FIG. 8 also illustrates how a portion of the wipe storage space 58 may be located within the restroom interior 22 (i.e., inside the second wall) and how a portion of the wipe storage space 58 may be located within the tower interior 44. As shown, the wipe dispenser 60 extends within the tower interior 44. This also applies to the trash receptacle space.

[0084]

[0107] In a preferred embodiment, the upper wall 90 (and / or counter 100) of the sink 86 includes a curved portion or surface 104 that contacts and is flush relatively with the wiping panel 66. Preferably, the joint or groove 106 between the upper edge of the curved surface 104 and the lower edge of the wiping panel 66 is vertically oriented, thus preventing soil from accumulating therein. As used herein, "contacting" means that the edges may touch each other or may be closely adjacent to each other.

[0085]

[0108] As shown in Figures 3 and 9-13, in a preferred embodiment, the restroom monument assembly 10 includes an air replenishment system 108 that provides the ability to replenish or purify the air within the restroom interior 22 when desired (e.g., when a button is pressed or a switch is activated, when a specific action is taken, such as a user exiting the restroom, etc.). The restroom air replenishment system can indicate the status of the air within the restroom, including a "replenished" state and an "unreplenished" state. In the "replenished" state, the restroom is considered available for use by passengers or passengers may enter the restroom. In the "unreplenished" state, the restroom is considered not available for use by passengers or passengers should not enter the restroom. In a preferred embodiment, the air replenishment system is activated each time a passenger exits the restroom. Thus, after a passenger leaves the restroom, the air volume within the restroom is in an unreplenished state, and after the air replenishment system is activated, the air volume within the restroom is in a replenished state. As described below, activation of the air replenishment system can be automated or can be activated by pressing a button or other manual switching action. After a predetermined period of time, the system may assume that the air is not being replenished. For example, if the restroom is unused for 15 minutes, the air in the restroom may need to be replenished. In an automated system, the air replenishment system will activate and return to a replenishment state. In a manual system, an indicator state may change (e.g., the beacon light 80 or other light on the tower assembly 30 may change from green to red, or the indicator light 130 described below may change from green to red), thus requiring the user to press a button to replenish the air in the restroom. In a preferred embodiment, the entry door may lock when the air is not being replenished.

[0086]

[0109] The enclosure 12 includes an inlet 110 for admitting air from outside the enclosure (e.g., the cabin interior, the ECS or environmental control system, etc.). The inlet 110 may be located anywhere in the restroom monument assembly 10 (e.g., in any of the walls, ceiling, floor, etc.). As shown in FIG. 9, in a preferred embodiment, the inlet 110 or decompression vent is located within the entry door 28.

[0087]

[0110] A toilet 112, including an outlet 114, is disposed in the restroom interior 22. The outlet or a valve therein includes an open state and a closed state. When the outlet 114 is in an open state, the restroom interior 22 is in fluid communication with the exterior of the restroom monument assembly 10 or housing 12, and air within the restroom can be drawn or sucked therefrom. A vacuum system 116 (see FIG. 3 ) is preferably used to draw a volume of air within the restroom interior 22 from the housing 12. In a preferred embodiment, the same air vacuum system 116 used to clean the toilet can be used or reused to draw air from the restroom interior through the outlet 114 or toilet bowl opening. In a preferred embodiment, the toilet seat and / or toilet seat cover 118 are in an open position when air is drawn through the outlet. In this embodiment, the toilet seat and / or cover 118 are automated so that they can open or move to the open position before the current volume of air within the restroom is drawn or sucked out through the outlet 114. Thus, in a preferred embodiment, the system opens the toilet seat and / or cover whenever the system is activated. In a preferred embodiment, a solenoid in the toilet lid hinge damping mechanism 120 is activated to open the toilet seat, and then deactivated when the air cycle is complete, thus allowing the lid or cover 118 and / or seat to close.

[0088]

[0111] As shown in Figure 9, when the system is activated, a quantity of air within the enclosure is pulled through the open outlet 114 (see arrow A1 in Figure 9). Simultaneously, air from outside the enclosure 12 is pulled through the inlet 110 to replace the quantity of air that just exited. The air present within the restroom before activation of the system may be referred to herein as a first quantity of air, and the air present in the restroom after activation of the system that enters through the inlet may be referred to herein as a second quantity of air or make-up air.

[0089]

[0112] 10, in a preferred embodiment, the inlet 110 includes a filter 122 (such as a HEPA filter therein) through which air passes as it enters the interior of the restroom. In another preferred embodiment, the inlet 110 may include an air purifier 124 disposed therein through which air passes as it enters the interior of the restroom.

[0090]

[0113] The air replenishment system 108 may activate at predetermined intervals when a button is pressed and / or a switch is activated. In a preferred embodiment, the air replenishment system 108 may only activate when no one is in the restroom and when the entry door 28 is closed. In one embodiment, the air replenishment system 108 cannot activate when the entry door 28 is locked, as restrooms are typically locked only when someone is present in the restroom. However, the system may also automatically lock the entry door when an air replenishment cycle is about to occur to prevent the door from being opened during the cycle. In a preferred embodiment, the restroom enclosure includes a sensor or detector for determining when someone is present in the restroom.

[0091]

[0114] As shown in FIGS. 10-11 , in a preferred embodiment, the air replenishment system 108 includes an activation assembly 126 that includes a manual activation button 128 and a plurality of indicator lights 130 that surround or encircle the button 128. The indicator light 130 is a visual indicator that surrounds the button 128 and can change color in a ring pattern or be turned on and off to communicate information to flight crew and / or passengers. The button can be any type of switch configured to activate the system and replenish air. The light may be an LED or other type of light. The light may also be arranged in a line or other shape. In a preferred embodiment, the light 130 is an indicator system configured to indicate the air status of the restroom interior 22. The light can be programmed to change color between a refilled and an unrefilled state. The light can be steady in the refilled state and flash or off in the unrefilled state. In another embodiment, the light can act as a timer to indicate how much time has passed since the air was refilled. For example, the lights may be all green to indicate that the air has just been refilled. Thereafter, for each minute (or other predetermined time) that passes, one of the lights may turn red (or the light may go off). Different passengers may desire to press button 128 to refill air based on how many red or off lights are present. It will be appreciated that the amount of time since the last refill may also be indicated on the display screen 76 (e.g., "10 minutes since last air refill" may be displayed on the screen).

[0092]

[0115] FIG. 12 is a flowchart illustrating the use of the air replenishment system 108. As shown, two distinct actions can occur after a passenger (abbreviated as pax, as known in the art) uses and exits the restroom (step 132): an automated step to initiate the left-side air replenishment (step 134), or a manual action to press or activate the right-side manual activation button (step 136). In a preferred embodiment, an automatic action to initiate a cleaning cycle (step 140) begins a predetermined number (x) of seconds (step 138) after the restroom is used. This could be x seconds after the door is unlocked, x seconds after the door is closed, x seconds after a sensor in the restroom senses that no one is inside the restroom, or x seconds after another predetermined event. Activation of the manual activation button 128 also initiates the cleaning cycle (step 140). The system can include both automated and manual options, or one or the other. FIG. 12 includes an exemplary "(2-10 seconds)" to indicate that the cleaning cycle step takes 2-10 seconds. However, this is not limiting, and the refill cycle (pulling a first amount of air from the outlet or moving a second amount of air through the inlet) can take longer (e.g., 2-60 seconds), but preferably less than 30 seconds. During a cleaning or air refill cycle, the following steps can occur: initiating a vacuum extraction in the restroom toilet system (step 142); extracting air from the passenger compartment through the inlet (step 144); filtering the air through a HEPA filter (this is optional) (step 146); adding fragrance to the inlet air (this is optional) (step 148); air flowing through an upper section inside the restroom into the toilet and through the outlet (step 150); and then the restroom being ready for use (step 152).

[0093]

[0116] 12 also shows that while some of the above steps are occurring, the activation assembly 126 (and its indicator light 130) can indicate that an air replenishment or clean air cycle is occurring (step 154). For example, a light can illuminate and extinguish in a circular pattern to indicate that the air replenishment system is operating (similar to an indicator on a computer screen that a program is running), or a light can flash to indicate that the air replenishment system is operating or in progress. This progress indication can also be shown on the display and / or indicated by a flush light (e.g., 80).

[0094]

[0117] According to a preferred embodiment of the present invention, FIG. 13 shows another flowchart or decision tree relating to when a "cleaning cycle" or air refill (or UV disinfection, discussed below) can occur. In a preferred embodiment, a cleaning cycle occurs only when a passenger is not in the restroom. Thus, the system determines whether a passenger is in the restroom. This occurs both after automatically initiating air refill (step 134) (e.g., after a predetermined period of time has elapsed and the system is ready to refill air) or after pressing a manual activation button (step 136). The system queries whether the door is locked or unlocked (step 160) and whether the entrance door is closed or open (step 162). If the door is locked, the system assumes the passenger is in the restroom, and the system continues to query until the door is unlocked. Thus, if a passenger presses the manual activation button 128 when the door is locked, nothing happens. If the door is open, the system continues to query until the door is closed. If the door is unlocked and closed, the system can run a cleaning cycle (step 164). If the door is reopened (step 166), the system resets (assuming another passenger has entered the restroom).

[0095]

[0118] In a preferred embodiment, the air replenishment system includes software and / or a controller (located in a lavatory or centrally located within the aircraft) that controls the operation of the system. The flowcharts and / or decision trees described above can be associated with the software and / or controller.

[0096]

[0119] As shown in Figures 14-17B, in a preferred embodiment, an aircraft restroom monument 10 includes a UV disinfection system that disinfects specific surfaces within the restroom at predetermined intervals or after each use of the restroom by a passenger. The UV disinfection system includes lenses that direct UV light toward specific surfaces coated with a UV-reflective material, toward the surfaces to be disinfected (referred to herein as "direct surfaces to be disinfected") and toward other surfaces to be disinfected (referred to herein as "indirect surfaces to be disinfected"). The UV disinfection system may be associated with the air replenishment system described above, or the UV disinfection system may be separate from the air replenishment system but operate similarly (e.g., the system may be activated after use of the restroom or when a button is pressed). Accordingly, all discussion related to the operation of the air replenishment system (e.g., flowcharts, etc.) also applies to the UV disinfection system.

[0097]

[0120] 14-16 illustrate an exemplary light assembly 200 including a lens member 202 and one or more fixtures 204 containing a UV light source 206 therein. FIG. 16 illustrates a cross section of the light assembly 200, including multiple light beams extending from the UV light source 206. The lens member 202 optionally includes a surface geometry that directs the light beams toward the direct surface to be disinfected. As illustrated, some light beams may not change direction as they pass through the lens member 202, while other light beams may refract, change direction, or become angled as they pass through the lens member 202 based on the lens geometry. The lens member includes a first surface 200a, a second surface 200b, and a thickness. The thickness varies as needed to direct the light beams. See, for example, the first thickness T1 and the second thickness T2 in FIG. 16.

[0098]

[0121] 17-17B illustrate an example in which light assembly 200 is positioned below mirror 208 in a restroom to disinfect surfaces such as sink 210, countertop 212, faucet 214, and soap dispenser 216. Arrows in the diagram represent the direction of light rays. Light rays labeled L1 and L2 represent light rays emitted from light assembly 200. These light rays are directed in predetermined directions based on lens element 202. Light ray L1 is directed toward direct surface 218 to be disinfected. See, for example, arrow L1, which is directed toward the top of faucet 214. Light ray L2 is directed toward reflective surface 220, and light ray L3 is reflected from reflective surface 220 and directed toward indirect surface 222 to be disinfected, see, for example, the underside of soap dispenser 216.

[0099]

[0122] 17-17B show an exemplary reflective surface 220 on a countertop 212 that includes a UV-reflective coating 224 thereon. The reflective surface 220 has a different angle than the countertop surface. As shown in FIGS. 17A and 17B, the angle of the reflective surface 220 is selected to direct light rays L3 toward the underside of the soap dispenser 216, which is the indirect surface 222 to be disinfected. As shown in FIG. 17B, the reflective surface 220 can include a transparent material 226 or coating thereon so that the reflective surface is "embedded" into the countertop (or wall, panel, or other component requiring a reflective surface) and thus does not create areas for water to pool or dirt to collect. FIGS. 17A and 17B show a UV-reflective coating on both the countertop surface and the angled reflective surface 220 (referred to herein as the "target reflective surface" 220). Some embodiments can include only the target reflective surface 220, while other embodiments can include the UV-reflective coating 224 on many or all surfaces (referred to herein as the "general reflective surface"), thus providing as much reflection as possible. Other embodiments, such as those shown in Figures 17A and 17B, can include both.

[0100]

[0123] FIG. 17 also shows an exemplary targeted reflective surface 220 within the sink for reflecting UV light onto the bottom of the faucet 214. It should be understood that these reflective surfaces are exemplary only, and that light assemblies 200 and targeted reflective surfaces 220 or general reflective surfaces may be arranged and positioned throughout the restroom interior to strategically disinfect many surfaces and components. For example, FIGS. 3, 4, and 9 show, among other things, light modules 200 positioned throughout the restroom interior (see also reflective surfaces 220 in FIG. 9). It should be understood that any component or area within the restroom can be disinfected using UV light, such as the door handles, the area around the sink (basin 86), and the countertop, including the faucet, soap dispenser, and waste flap (if present), as well as specific areas associated with the toilet 112, toilet shroud 113, cover 118, flush button 115, seat cover dispenser, and seat 117.

[0101]

[0124] Referring to Figures 18-19, in a preferred embodiment, the restroom monument assembly includes a visual indication system to do one or more of the following: 1) provide a visual indication of "high priority areas" that require longer disinfection times using UV light to disinfect surfaces; 2) provide a visual indication that antimicrobial additives are still present and active in coatings on surfaces on components within the restroom; and / or 3) provide a visual indication that surfaces have been recently disinfected.

[0102]

[0125] The visual indication system is preferably contained in a coating, film, panel, etc. (all sometimes referred to herein as a "visual indication coating") that at least partially covers many or all of the surfaces of components within the restroom. The visual indication coating includes a luminescent dye or additive therein (also referred to herein as an activating additive). In a preferred embodiment, the visual indication coating also includes an antimicrobial additive, thus creating a visual indication coating that is also a disinfecting coating. The present invention involves the addition of an additive or dye in the disinfecting coating or film that luminesces or illuminates when illuminated by light of a specific range of wavelengths (e.g., UV light, black light, etc.). The luminescence provides a visual indication of disinfection. The additive may be a fluorescent dye and / or a phosphorescent dye defined by the wavelength of the UV or laser energy used to create the desired response.

[0103]

[0126] FIG. 18 shows a visual indicator coating 168 including an antimicrobial additive and first and second excitation additives applied to or coated on the seat of a toilet 112. It is understood that the toilet is merely an example, and the visual indicator coating can be applied to the surface of any component within a restroom. The first excitation additive is a fluorescent additive 170, and the second excitation additive is a phosphorescent additive 172. The fluorescent additive 170 can be used to indicate where the energy of the disinfecting UV light is being directed. The stronger the excitation or fluorescent response when the UV light is directed at the surface, the stronger the UV light will be illuminated and the better the level of sanitization will occur. Brighter or stronger excitation will result in stronger disinfection, and weaker excitation will result in weaker disinfection. Thus, during use, as the attendant brings the UV light closer to the seat surface, the fluorescent additive or dye will be illuminated more brightly. Additionally, as the attendant moves the UV light closer to the normal of the seat surface, the fluorescent additive or dye will be illuminated more brightly. This signals the crew to move the light closer, bringing it closer to the surface normal.

[0104]

[0127] In embodiments where the restroom includes the UV disinfection system described above, when the flight crew is in the process of positioning the light assembly 200 and / or the reflective surface 220 and UV coating 224, the fluorescent additive can provide guidance regarding the intensity of UV light reaching the direct and indirect surfaces to be disinfected.

[0105]

[0128] Over time, the antimicrobial additive in the visual indicator coating 168 may decay or break down. The fluorescent additive may decay or break down on a similar time scale, or if the antimicrobial additive and the energetic additive are combined with each other, the amount of energetic additive in the coating may decrease the amount of the antimicrobial additive. As a result, the visual indicator coating (and / or the fluorescent additive therein) may illuminate less brightly during cleaning than it did previously. This may indicate that the previous coating was less effective at disinfecting and should be replaced. Scrubbering or cleaning the surface over time may also cause destruction of the antimicrobial properties and / or energetic additive.

[0106]

[0129] The phosphorescent additive 172 is included to provide a visual indication to both crew and passengers that the surface or visual indication coating 168 has recently been disinfected by UV light. As shown in FIG. 18 , a predetermined pattern 174 that provides a visual indication can be included. FIG. 18 includes two predetermined patterns 18: the word “SANITIZED” on the toilet seat and a circular emblem on the shroud 113. Thus, each time the toilet seat is disinfected using UV light, the word “SANITIZED” illuminates or glows, thus visually indicating to crew and passengers that the toilet seat will be clean. In embodiments where the UV disinfection system discussed herein is used and the restroom is disinfected after each use, the phosphorescent additive 172 is illuminated each time a new passenger enters the restroom. In a preferred embodiment, the predetermined pattern portion or symbol indicating that the restroom has been cleaned glows or is excited for approximately 60 seconds after the UV disinfection system has cleaned the surfaces and then turned off. In this case, after the restroom has been automatically cleaned by the UV disinfection system, passengers will see the symbol when they enter the restroom (if they enter immediately after cleaning) and by the time they finish using the restroom, the symbol will be turned off (no longer phosphorescent). In another embodiment where the system is not automated and the restroom is UV disinfected before flight, the phosphorescence or glow can last for several hours. As shown in FIG. 18 , the entire visual indication coating includes fluorescent additive 170, and only the predetermined pattern portion includes phosphorescent additive 172. In other words, the predetermined pattern portion includes both fluorescent additive 170 and phosphorescent additive 172.

[0107]

[0130] In a preferred embodiment, the fluorescent or phosphorescent additive 172 can be added to the coating using an inkjet printer or the like (in another embodiment, the fluorescent additive 170 can also be added using inkjet printing). The coating base can be a clean thin film that can be run through an inkjet printer with the phosphorescent additive 172 included therein. The printer prints a predetermined pattern or design onto the film.

[0108]

[0131] FIG. 19 illustrates an exemplary scenario in which toilet 112 includes first and second fluorescent additives 170a and 170b, each of which fluoresces or illuminates a different color. It will be understood that first and second fluorescent additives 170a and 170b may be included in the same coating or in separate coatings applied separately. In use, when the surface covered by visual indication coating 168 is exposed to UV light, first fluorescent additive 170a emits a first color and second fluorescent additive 170b emits a second color. As shown in FIG. 19, the first fluorescent additive is located on the high-touch areas of the toilet seat and the rim of toilet cover 118. Thus, the first color indicates to attendants that the toilet seat and rim of toilet cover 118 require a longer disinfection time than areas with the second color, which are lower-touch areas.

[0109]

[0132] The use of the visual indicator coating in an aircraft restroom is not a limitation of the present invention. The visual indicator coating can be used on any surface to be disinfected within an aircraft or vehicle, or in any other scenario where a visual indication of the disinfection of a surface is desired. For example, the visual indicator coating can be used in an aircraft on tray tables, seat belts, door handles, armrests, gas vents, etc.

[0110]

[0133] Unless the context clearly requires otherwise, throughout this specification and claims, the words "comprise," "including," and the like should be construed in an inclusive sense, i.e., meaning "including, but not limited to," as opposed to an exclusive or exhaustive sense. As used herein, the terms "connected," "coupled," or any variation thereof, mean any connection or coupling, either direct or indirect, between two or more elements, and the coupling of the connections between the elements may be physical, logical, or a combination thereof. Furthermore, the words "herein," "above," "below," and words of similar import, when used in this application, refer to this application as a whole and not to any particular portions of this application. Where the context permits, words in the above detailed description of preferred embodiments using the singular or plural may also include the plural or singular, respectively. The word "or" in reference to a list of two or more items includes all of the following interpretations of the word: any of the items in the list, all of the items in the list, and any combination of the items in the list.

[0111]

[0134] The above detailed description of embodiments of the present disclosure is not intended to be exhaustive or to limit the teachings to the precise form disclosed above. While specific embodiments and examples of the present disclosure have been described above for illustrative purposes, those skilled in the art will recognize that various equivalent modifications are possible within the scope of the present disclosure. Furthermore, any specific numbers referred to herein are merely examples, and alternative implementations may employ different values, measurements, or ranges.

[0112]

[0135] Although the operations of any method disclosed or described herein are explicitly or implicitly shown and described in a particular order, the order of operations of each method may be changed such that certain operations may be performed in the reverse order or such that certain operations may be performed at least partially concurrently with other operations. In alternative embodiments, instructions of separate operations or sub-operations may be implemented in an intermittent and / or alternating manner.

[0113]

[0136] The teachings of the disclosure provided herein may be applied to other systems, not necessarily the system described above. Elements and operations of the various embodiments described above may be combined to provide further embodiments. Any measurements or dimensions described or used herein are merely examples and are not intended to limit the invention. Other measurements or dimensions are within the scope of the invention.

[0114]

[0137] Any of the above patents and applications and other references, including any that may be listed in accompanying filing papers, are incorporated herein by reference in their entirety. Aspects of the present disclosure can be modified, if necessary, to employ the systems, functions, and concepts of the various references discussed above to provide still further embodiments of the present disclosure.

[0115]

[0138] These and other modifications can be made to the present disclosure in light of the above detailed description of the preferred embodiments. While the above description describes particular embodiments of the present disclosure and sets forth the best mode contemplated, no matter how the above details appear in the text, the present teachings can be implemented in many ways. While the details of the system are encompassed by the subject matter disclosed herein, the details of its implementation may vary considerably. As noted above, specific terms used when describing particular features or aspects of the present disclosure should not be construed as implying that the terms are redefined herein to be limited to any particular feature, characteristic, or aspect of the present disclosure to which they pertain. In general, the terms used in the following claims should not be construed to limit the disclosure to the specific embodiments disclosed in the specification unless the above detailed description of the preferred embodiments section explicitly defines such terms. Thus, the actual scope of the present disclosure encompasses not only the disclosed embodiments but also all equivalent ways of practicing or implementing the disclosure under the scope of the claims.

[0116]

[0139] Although certain aspects of the present disclosure are presented below in particular claim form, the inventors contemplate various aspects of the present disclosure in any number of claim forms. For example, while only one aspect of the present disclosure is recited as a means-plus-function claim under 35 U.S.C. § 1126, paragraph 6, other aspects may likewise be embodied as means-plus-function claims or in other forms, such as embodied in a computer-readable medium. (Claims intended to be treated under 35 U.S.C. § 112, paragraph 6, include the words "means for.") Accordingly, the applicants reserve the right to add additional claims after filing to pursue such additional claim forms for other aspects of the present disclosure.

[0117]

[0140] Thus, while exemplary embodiments of the present invention have been shown and described, it should be understood that all terms used herein are descriptive rather than limiting, and that many changes, modifications, and substitutions may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. 1. A vehicle restroom monument assembly, comprising: an enclosure including first, second, third, and fourth walls that cooperate to define a restroom interior, the entrance door being disposed on the second wall; a sink assembly located within the restroom, the sink assembly including a sink including a back wall, a top wall, a bottom wall, a first side wall, and a second side wall that cooperate to define a sink interior, the top wall including a top surface, an extension, and a bottom surface, the bottom surface partially defining the sink interior, and the top surface being a counter; a wiping panel located within the restroom and partially defining a wipe storage space, the wiping panel including a lower edge that contacts the extension that extends upward from the upper surface, thereby offsetting the lower edge from the upper surface and covering an upper edge of the extension; At least a first access opening is defined in the second wall, a tower assembly partially defining the wipe storage space is positioned to cover the first access opening, the tower assembly is movable between an open position and a closed position, and includes a first door partially defining the wipe storage space, when the first door is in the open position, the interior of the restroom is accessible from outside the restroom monument assembly, and the first door provides access to the wipe storage space within the restroom. Vehicle restroom monument assembly.

2. 2. The vehicle restroom monument assembly of claim 1, wherein the sink assembly is located adjacent to the third wall, and the top wall of the sink includes a front surface that slopes inward from a location adjacent to the entry door toward the third wall.

3. 2. The vehicle restroom monument assembly of claim 1, wherein the bottom wall, the first side wall, and the second side wall of the sink basin include handle portions at their fronts.

4. 4. The vehicle restroom monument assembly of claim 3, wherein said handle portion is thicker than said bottom wall, said first side wall, and said second side wall.

5. The vehicle restroom monument assembly of claim 1 , wherein a water dispenser is associated with the bottom surface of the top wall.

6. The vehicle restroom monument assembly of claim 1 , wherein the sink includes an ultraviolet light source configured to disinfect the sink.

7. The vehicle restroom monument assembly of claim 1 , wherein the upper wall includes a curved portion that contacts the lower edge of the wiping panel.

8. 10. The vehicle restroom monument assembly of claim 1, further comprising a trash bin panel located inside the restroom, the tower assembly partially defining a trash receptacle space, the tower assembly being movable between an open position and a closed position and including a second door partially defining the trash receptacle space, the second door providing access to the trash receptacle space partially defined by the trash bin panel.

9. 1. A vehicle restroom monument assembly, comprising: an enclosure including first, second, third, and fourth walls that cooperate to define a restroom interior, the entrance door being disposed on the second wall; a sink assembly located within the restroom, the sink assembly including a sink including a back wall, a top wall, a bottom wall, a first side wall, and a second side wall that cooperate to define a sink interior, the top wall including an upper surface, an extension, and a bottom surface, the bottom surface partially defining the sink interior, the upper surface being a counter, the sink assembly being located adjacent a third wall, the top wall of the sink assembly including a front surface that slopes inwardly from a location adjacent the entry door toward the third wall, the bottom wall, the first side wall, and the second side wall of the sink including a handle portion at a front thereof, the handle portion being thicker than the bottom wall, the first side wall, and the second side wall, and a water dispenser and a soap dispenser are associated with the bottom surface of the top wall; At least a first access opening is defined in the second wall, a tower assembly partially defining a wipe storage space and a trash receptacle space is positioned to cover the first access opening, the tower assembly includes first and second doors each movable between an open position and a closed position, the first door partially defining the wipe storage space and the second door partially defining the trash receptacle space, when the first and second doors are in the open position, the interior of the restroom is accessible from outside the restroom monument assembly, and the first door a door providing access to the wipe storage space within the restroom, the second door providing access to the trash receptacle space within the restroom, a wiping panel disposed within the restroom and partially defining the wipe storage space, a trash can panel disposed within the restroom and partially defining the trash receptacle space, the wiping panel including a lower edge, the lower edge contacting the extension extending upward from the upper surface such that the lower edge is offset from the upper surface, and the lower edge covering an upper edge of the extension. Vehicle restroom monument assembly.

10. 9. The vehicle restroom monument assembly of claim 8, wherein a trash can panel is positioned inside the restroom and partially defines the trash receptacle space.

11. 11. The vehicle restroom monument assembly of claim 10, wherein the sink includes an ultraviolet light source configured to disinfect the sink.

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