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  Hygienic high detergency toiletUSPTO Application #: 20070199138Title: Hygienic high detergency toilet Abstract: In accordance with an embodiment of the invention, the hygienic toilet with a user protection from evacuations is designed. A self-foaming liquid soap as a high efficiency absorbing substance is used from contaminations produced during evacuations. A water tank is comprised of two compartments: one is for flashing water that could be a regular gravity tank, or a pressure assisted flash water, and a separate compartment is for a self-foaming liquid soap. A toilet bowl is designed with two rims: one is for a flashing water and another one for a soap foam. A soap foam is applied into a bowl walls and on a water surface on a bowl bottom for protection from evacuations and reflections into a user. Analysis of a liquid flow in a toilet bowl made possible to utilize a theory of surface waves in a bowl exit outlet designed in the form of a converging-expanding channel with a high velocity liquid flow through the toilet bowl without disturbances and atomizing effects and providing a maximum efficiency detergency of bowl walls. (end of abstract)
Agent: Viacheslav V. Zhurin - Fort Collins, CO, US Inventors: Viacheslav V. Zhurin, Lyudmila V. Zhurin USPTO Applicaton #: 20070199138 - Class: 004300000 (USPTO) Related Patent Categories: Baths, Closets, Sinks, And Spittoons, Flush Closet The Patent Description & Claims data below is from USPTO Patent Application 20070199138. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION Field of the Invention [0001] This invention relates generally to the field of development of the hygienic toilets, and more specifically to the toilets equipped with means for protection of users from residues of previous users and their own contaminations during utilization of a toilet facility. Also this invention relates to designing a toilet bowl with fast motion of flashed water that facilitates high detergency efficiency of evacuations. [0002] Many people believe that sharing a toilet seat is like sharing a toothbrush or bath towel with strangers. This risk people take everyday in public restrooms, such as hotels, airports, hospitals, schools, even at homes. However, a toilet seat can be washed and cleaned, covered with paper, or material before use. The most dangerous part is inside a toilet itself, from its walls and from the contents of a bowl. During evacuation process humans produce solid and liquid waste that make splashes during contact with water in a bowl and with bowl walls. These splashes reflect person's evacuations, previous residues and send back to this person. Together with this flow of own evacuations there are droplets, pieces and other particles attached to bowl walls that reflect to a person. There are data that splashes from a toilet bowl can project reflections of liquids and solid particles substantially over 10 feet in the air. [0003] Historically, toilets always were a "weak" point in human culture. During several thousand of years humans always suffered from their own evacuations and never had clean nice hygienic toilets. Last century, especially, in 1980-1990s significant progress was achieved in improvement of toilets. The latest concern was about water consumption for toilets. In 1995 the National Energy Policy Act went into effect that required using 1.6 gallon water toilets for the entire US. The new standard was quite a big change from 5.5 gallons in 1960s and 3,5 gallons in 1980s. However, there was little done about providing humans with better hygienic toilets. Though there were various inventions for improvements of better detergency efficiency from a flashed water. [0004] Companies-producers of toilets and accompanying equipment came with variety of solutions for general toilet performance such as re-engineerings a water tank with different flashing technologies, with redesign of toilet bowls utilizing modern approaches in hydrodynamics like a cyclonic motion of water with waste, covering bowl with non-sticking glaze, disinfections of a seat and a toilet bowl by a flashed water with disinfectants, and even utilizing computer technology for obtaining user's evacuation sample analysis. [0005] Here are some other expensive improvements in technology of toilets such as: 1. automatic opening-closing lid; 2. various ways of bowl cleaning; 3. hand-free automatic flush; 4. warm-in air purifying system; 5. oscillating/pulsating washing; 6. warm air dryer, and other complex and expensive gadgets. They certainly make life of toilet user easier and safer. However, even several washings of bowl by water and disinfectants do not completely eliminate microbes, bacteria and viruses from toilet bowl walls and from water contaminated with human waste. It is known fact that despite that urine itself is sterile, but a residual urine can breed bacteria, leading to a urinary-tract infection. Solid evacuations from sick people have microbes, bacteria and viruses that can stick to bowl walls. Also healthy people have microbes, bacteria and viruses that can be dangerous to others. Splashes and "misses" from evacuations work like projectiles and contaminate users of a toilet bowl. In other words, any expensive toilets can spray fecal-infected water into the air on bowl's walls and on the user. The important conclusion: there are no safe hygienic toilets available. The safest hygienic toilet is your own one at home, which you disinfect after each usage (who does it?) comparatively to others that everyone has to utilize from time to time in public places. [0006] In a Cooperative Canadian and American Project "Maximum Performance Testing of Popular Toilet Models" by W. Gauley and J. Koeller, Final Report, December 2003 there were tested varieties of toilets of major world toilet producing companies (such as Toto, American Standard, Koehler and many others) for toilets operation such as a flush performance of human waste and a water exchange test. In a water exchange test there was measured a capability of toilets for a removal of a brine mixture utilizing an electrical conductivity meter. About 20 ml of 18 gram/liter salt solution were added to a test bowl and dissolved. An electrical conductivity of water was measured and recorded. Then, a toilet was flashed and refilled. A refilled water electrical conductivity in a test bowl was again measured and recorded. From here a percentage of water change-out was calculated. All tested models achieved a change-out rate of at least 98 percent. Also, it was noted that there were problems with toilets that failed to remove solid and liquid waste, when both solids and liquids were being flushed. From these tests one can conclude that remaining less than 2 percent of dissolved waste would present problems to users during next toilet operation, because most people have microbes, bacteria and viruses in their waste evacuations. SUMMARY OF THE INVENTION [0007] In the light of foregoing, it is an object of the invention to introduce a hygienic toilet with a water tank and a bowl of a design based on the analysis of a liquid flow, and a method providing a hygienic toilet for protection of users from contaminations that take place during users evacuations. [0008] Another object of the present invention is to introduce a high efficiency absorbing substance for protection of toilet users from contaminations produced during evacuations in the form of a self-foaming liquid soap applied into a toilet bowl from a tank comprising of two-compartments: one is for a water flash and another is for a self-foaming liquid soap. [0009] Still another object of the present invention is a design of a toilet bowl comprising of two separate rims on a top of a bowl: one is for a flash water flow and another one for a liquid self-foaming soap flow. A water rim has a plurality of small holes (over 15 and up to 50) of 4-6 mm in diameter for water, and a foam rim has a plurality of larger holes (over 10 and up to 30) of 8-15 mm in diameter for a soap foam flow. A foam rim can be connected together with a water rim for regular washing with water through a foam rim, if necessary. [0010] Yet another object of the present invention, instead of a passive water flash from a water tank, it is envisaged a utilization of a service water from a regular municipal water line of 1.6 gallon volume at higher pressure of about 60 psi, or a small pump for amplification of water pressure over 50 psi from a regular water tank. This higher water pressure is utilized for obtaining higher water velocities in a bowl thus providing better detergency efficiency of a toilet bowl for washing out evacuations and contaminations of a bowl surface. [0011] A further object of the present invention is a design of a bowl with exit outlet of water with evacuations at higher pressure and velocity to ensure optimum removal of evacuations and a high detergency efficiency. This exit outlet is designed in a form of a nozzle (converging-expanding channel) for obtaining maximum efficiency and higher velocity of evacuating flow. BRIEF DESCRIPTION OF DRAWINGS [0012] Features of the present invention which are believed to be patentable are set forth with particularity in the appended claims. The organization and operation manner of the invention, together with further objectives and advantages thereof, may be understood by reference to the following descriptions of specific embodiments taken in connection with accompanying drawings, in the several figures of which like reference numerals identify similar elements and in which: [0013] FIG. 1 presents graphical dependencies of a velocity of liquid's surface waves C.sub..lamda. and a flow velocity V.sub.x as a function of a liquid flow thickness h. In FIG. 1b there are presented graphical dependencies of a liquid surface wave velocity C.sub..lamda. and a liquid flow velocity V.sub.x as a function of a geometrical non-dimensional parameter A. [0014] FIG. 2 presents a schematic drawing for a liquid flow explaining the main assumptions of a "shallow water" theory. Letters r.sub.n, r.sub.v, h and V.sub.x are a radius of a converging expanding channel (nozzle) in its narrow cross section, a radius of a gas (air) vortex of a flow that takes place in a toilet bowl, a thickness of a liquid (water) flow and a velocity of a liquid (water) flow in a bowl, correspondingly. [0015] FIG. 3a presents a picture explaining transitions from undercritical regime of flow in a regular long channel leading to a flow with discontinuities arising from friction and wave interactions. FIG. 3b presents a liquid flow with flow motion experiencing a critical and supercritical regime in a converging-expanding channel when there are no discontinuities in vicinity of a converging-expanding area. [0016] FIG. 4 is a schematic drawing of a toilet tank comprising of two compartments: one is for flash water and another one for a liquid self-foaming soap. In FIG. 4 there is shown a toilet bowl with two separate rims: one rim is for flashing water with placement of small holes that provide a flow of flashing water for washing out evacuations and water, and another rim is for a soap foam with placement of larger holes that provide a flow of a soap foam for filling in a bowl surface and a water surface at a bowl bottom. And FIG. 4 presents a schematic drawing of a toilet bowl showing a bowl's exit outlet with a converging-expanding channel for obtaining optimum detergency efficiency of a bowl by high velocity, high pressure liquid flow with a vortex. [0017] FIG. 4 also presents a schematic drawing of a toilet bowl with geometric dimensions for understanding of application of the hydrodynamic flow theory in a bowl with a vortex and its main dimensions. These dimensions of a toilet bowl are as follows: R.sub.in is a radius of a bowl internal side where water enters from a water tank through inlet orifices of a radius r.sub.in; r.sub.n is a radius of a bowl converging expanding channel serving as a bowl exit outlet in a narrow cross section of this channel; r.sub.v is a vortex radius in a bowl's liquid flow. DESCRIPTION OF THE PREFERRED EMBODIMENTS [0018] What is the solution to the problem of preventing toilet user from bowl contaminations and having a hygienic toilet? One of the solutions is the utilization of a toilet bowl walls and a water surface covered with a material, or a substance during a contact of urine and solid evacuations with bowl's walls and water on a bowl exit outlet that do not reflect contaminating particles. In other words, there must be utilized a substance that can absorb urine and solid evacuations and will not reflect any parts of evacuations back into a user. A good candidate for this task is foam and, especially, foamy disinfecting soaps and its compositions. Recent improvements in soap production technology made possible to utilize a self-foaming soap that is easy available and inexpensive. [0019] Foam presents itself a large group of bubbles composed of a gas-liquid phase. The process of foam development takes place during gas dispersion in a liquid medium and formation of a new gas-liquid phase in a form of large groups of bubbles in a liquid's volume. The creation of stable highly dispersion foam is provided by additives of foam stabilizers or foam developers. Soap bubbles can exist due to a surface tension force. This force is caused by the attraction between molecules of a soap film. The present invention relates in general to the utilization of self-foaming antibacterial liquid soap compositions that provide necessary surface tension between soap bubbles and prevent bubbles from destruction for a reasonable time of 15-20 minutes. In particular, the invention relates to a self-foaming antibacterial soap that can cover walls and a toilet bowl surface that can protect these walls and a bowl water surface during user's evacuations in a way that the evacuations during interactions with toilet bowl walls and a water surface will be absorbed by a soap foam without reflections back into a user. Soap foamy composition forms protective absorbing layer that prevents from reflections. The use of foam generating equipment till recent times was a cumbersome and time consuming. However, the latest advances in development of self-foaming devices that are inexpensive and simple make this problem easy to solve. In this case, there is no need for the foam generating devices. Continue reading... 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