Antimicrobial self-cleaning toilet

Patent metadata

Field	Value
Publication number	US-9986879-B2
Application number	US-201715664045-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Jul 5, 2016
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A toilet comprising a rinsing seat, a rimless bowl, and a helical loop trapway is disclosed. An annular cavity for the purpose of storing and dispensing rinse water from the rinsing seat is disclosed. Outlet nozzles arranged about the circumference of the rinsing seat and designed to dispense rinse water at the rimless bowl are disclosed. Rinsing seat supports, hinge assemblies, and seat sensors which offer additional functionality to the rinsing seat are also disclosed. The toilet includes a steep interior surface with a titanium dioxide coating and actuatable ultraviolet light sources. The titanium dioxide has antimicrobial properties in the presence of ultraviolet light to sanitize the toilet. The ultraviolet light source is actuatable to control when the antimicrobial properties of the titanium dioxide coating are activated. The exterior of the toilet is coated with doped titanium dioxide which is antimicrobial in the presence of visible light.

First claim

We claim:

1. A toilet comprising:
a rimless bowl comprising:
an inner surface;
a titanium dioxide coating disposed on the inner surface; and
an ultraviolet light source, wherein the ultraviolet light source directs ultraviolet light towards the inner surface of the rimless bowl;
a seat comprising an annular cavity, said annular cavity comprising inlet ports connected to a remote water source, the seat further comprising a plurality of outlet nozzles arranged circumferentially and directed to the rimless bowl, the plurality of outlet nozzles being connected to the annular cavity; and wherein

a rinsing volume of water is dispensed out of the seat through the plurality of outlet nozzles; and
a doped titanium dioxide coating, wherein the doped titanium dioxide coating is adhered to at least one surface exterior to the rimless bowl.

2. The toilet of claim 1 , wherein the ultraviolet light source is disposed on an upper circumference of the rimless bowl.

3. The toilet of claim 1 , wherein the ultraviolet light source is disposed on a lower surface of the seat.

4. The toilet of claim 1 , wherein the doped titanium dioxide coating comprises nitrogen according to the following formula: TiO 2-x N x .

5. The toilet of claim 4 , wherein the doped titanium dioxide coating comprises between about 0.5% and about 2% nitrogen.

6. The toilet of claim 1 , wherein the ultraviolet light source emits light at wavelengths of less than about 520 nm.

7. The toilet of claim 1 , wherein the doped titanium dioxide coating comprises carbon according to the following formula: C—TiO 2 .

8. The toilet of claim 1 , wherein the doped titanium dioxide coating comprises one or more of the following list: phosphorus, sulfur, and fluorine.

9. The toilet of claim 1 , wherein the doped titanium dioxide coating comprises fluorine and nitrogen.

10. The toilet of claim 1 , wherein the doped titanium dioxide coating comprises at least one noble metal.

11. The toilet of claim 1 , wherein the doped titanium dioxide coating comprises at least one transition metal.

12. The toilet of claim 1 , wherein the ultraviolet light source is actuated by a switch.

13. The toilet of claim 1 , wherein the annular cavity further comprises a volume sufficient to store water and flush the toilet using the stored water and a water jet below a nominal water level of the toilet for initiating a flush.

14. The toilet of claim 1 , wherein the remote water source is pressurized, the annular cavity further comprises a pressurized line, and the pressurized line is capable of dispensing pressurized water out of the outlet nozzles.

15. The toilet of claim 14 , wherein the remote water source is a pressurized utility line of a building.

16. The toilet of claim 1 , wherein the seat further comprises one or more arcuate supports, each of said one or more supports being hingedly attached to a hinge assembly.

17. The toilet of claim 16 , wherein the one or more arcuate supports each comprise an interior cavity connected to the inlet ports, each interior cavity being connected to the remote water source.

18. The toilet of claim 1 , further comprising a water tank, said water tank storing and dispensing a flushing volume of water into a helical loop trapway, and wherein the flushing volume of water and the rinsing volume of water are independently controlled such that the rinsing volume of water may be dispensed while the flushing volume of water is not being dispensed.

19. The toilet of claim 1 , wherein the outlet nozzles comprise oscillating spray nozzles.

20. The toilet of claim 1 , wherein the rinsing volume of water is dispensed from the plurality of outlet nozzles in an overlapping pattern.

Assignees

• Hall David R
• Butala Steven J M
• Reynolds Jared
• Larsen Joshua
• Fox Joe

Inventors

• Hall David R
• Butala Steven J M
• Reynolds Jared
• Larsen Joshua
• Fox Joe

Classifications

• A61L2/088

  using photocatalysts or photosensitisers · CPC title

• E03D5/00

  Special constructions of flushing devices (in motor vehicles or trailers B60R15/00; in railway carriages B61D35/00; in ships B63B29/14; in aircraft B64D11/02), {e.g. closed flushing system} · CPC title

• E03D9/005

  Devices adding disinfecting or deodorising agents to the bowl · CPC title

• E03D11/02

  Water-closet bowls (auxiliary chambers with connections to flushing water for bowl-cleaning utensils E03D9/06; modified for using upwardly-directed sprays E03D9/08; seats or covers A47K13/00 ){; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl (parts or details of bowls E03D11/13)} · CPC title

• A61L2202/17

  Combination with washing or cleaning means · CPC title