Patent Application
20070057389
Not applicable
Not applicable
1. Field of the Invention
The present invention relates to sanitized water dispensers. More particularly, the present invention relates to a method and apparatus for dispensing ozone to the reservoir of a water dispenser that dispenses water for human consumption, wherein an improved diffuser of an ozone resistant porous polymer material receives ozone gas and dispenses very tiny bubbles into the water contained in the reservoir.
2. General Background of the Invention
Patents have issued for systems that dispense ozone to a water dispenser so that the ozone sanitizes any water that it is to be subsequently dispensed to and consumed by a user.
Other patents have issued that relate to polymeric diffuser materials.
The following U.S. Patents of Table 1 are possibly relevant to the present invention and incorporated herein by reference:
Some porous polymer gas diffuser materials have been used in an air to water diffusion environment such as in an aquarium. One such aquarium air diffuser device is sold by Regent Pet Products of Moore Park, California and sold under the trademarks Aquatech™, and Bubble Curtain™.
Incorporated herein by reference are all of our prior patents, patent applications, and published patent applications, including the following:
U.S. patent application Ser. No. 09/220,554, filed on Dec. 23, 1998, now U.S. Pat. No. 6,085,540; PCT/US99/27248, filed on Nov. 17, 1999, and published as WO 2000/38815 on Jul. 6, 2000; U.S. patent application Ser. No. 09/472,320, filed on Dec. 23, 1999, now U.S. Pat. No. 6,289,690; U.S. patent application Ser. No.09/881,796, filed on Jun. 15, 2001, published as 2003-0000966 A1 on Jan. 2, 2003, now U.S. Pat. No. 6,561,382; U.S. patent application Ser. No. 09/954,849, filed on Sep. 18, 2001, published as 2002-0069664 A1 on Jun. 13, 2002, now U.S. Pat. No. 6,532,760; PCT/US02/19158, filed on Jun. 17, 2002, and published as WO 2002/02706 on Dec. 27, 2002; U.S. patent application Ser. No. 10/463,870, filed on Jun. 17, 2003, and published as 2004-0074252 A1 on Apr. 22, 2004, which claims priority from U.S. provisional application No. 60/389,439, filed on Jun. 18, 2002, now expired; U.S. patent application Ser. No. 10/875,078, filed on Jun. 23, 2004, and published as 2005-0087554 A1 on Apr. 28, 2005; U.S. patent application Ser. No. 10/967,812, filed on Oct. 16, 2004, which claims priority from U.S. provisional application No. 60/511,986, filed on Oct. 16, 2003, now expired; and U.S. patent application Ser. No. 11/109,913, filed on Apr. 20, 2005, and published as 2005-0236432 A1 on Oct. 27, 2005, which claims priority from U.S. provisional application No. 60/564,178, now expired; PCT/US05/14118, filed on Apr. 21, 2005.
The present invention relates to the use of commonly available, inexpensive, food grade porous polymer gas diffuser materials as part of an overall method and apparatus for sanitizing a water dispenser with ozone gas.
A diffuser ring is supported with a plurality of supports or stand-offs that can be made of a food grade ozone resistant elastomeric material such as silicone, Tygon® or Viton®.
Each of these supports or stand-off provides a radiused base that conforms to the reservoir basal corner curvature. Each support can be secured to a diffuser that is elongated, hollow and tubular in transverse cross section and circular in shape, tracking the wall of a cylindrically shaped reservoir. Food grade silicone sealer or epoxy can be used to join the stand-offs or supports to the elongated ring diffuser.
The elongated porous polymeric diffuser has a memory and thus can function as a spring, attempting to return to a straight configuration so that it holds the stand-offs or support against the sidewall of the reservoir. The diffuser has a bore that is surrounded by a porous polymeric wall.
The material that forms the diffuser is of a porous polymer material that is highly resistant to ozone degradation over extended periods of time. The ozone is diffused through the ring diffuser wall. This diffused ozone preferably has a small concentration of ozone of at least up to about 0.5% by weight ozone in air.
The diffuser can be made of compressed glass or mineral or ozone resistant polymer fiber like polypropylene matting or mesh impregnated with thermo-setting resins that shrink on curing, leaving fine pores between spaces in the mesh or matting.
The importance of these food grade porous polymer fiber composite materials to ozone gas diffusion in cost sensitive micro-skill applications stems from their low cost, lower pressure loss, resistance to ozone, resistance to biofilming and pore fouling, ease of bubble size and pressure loss alteration, ease of formation and thermal bending at either an uncured or cured state to achieve complex shapes of small space saving tubing diameter into the preferred ring or rectangular diffusers, rigidity, flexibility toughness and impact resistance, thinness and lightweight.
These desirable features of the diffuser of the present invention place them apart from more costly, high thermal formation temperature, highly process intensive, conventional ozone industry standard brittle and low impact resistant diffuser materials consisting of porous centered metal and ceramics.
Past difficulties experienced with these conventional higher weight materials, such as an inability to meet necessary price points, material properties quality control during manufacture, breakage in manufacture, shipping and installation has dictated the need for less problematic materials capable of producing like or better properties.
The porous resin bonded fibrous composite materials of the present invention meet the necessary criteria for ozone diffusion in micro-skill applications such as water dispenser sanitation designed to drastically reduce the sanitary maintenance cost of water dispensers.
The method and apparatus of the present invention provides a cost effectiveness such that the diffuser can be classified as a quick change, throw away and replace material when fouled. This eliminates the problem of scheduled maintenance in acid and acid gas bleaching and cleaning that is required for the more expensive porous metal and ceramic diffusers.
For a further understanding of the nature, objects, and advantages of the present invention, reference should be had to the following detailed description, read in conjunction with the following drawings, wherein like reference numerals denote like elements and wherein:
FIGS. 1 and 2 show the preferred embodiment of the apparatus of the present invention designated generally by the numeral 10. Sanitized water dispenser 10 can be used with any water dispenser such as the inverted bottle type dispenser that is commonly sold nationwide such as Oasis® water coolers or dispensers for example. The dispenser can be any other dispenser for dispensing water for human consumption such as point of use types. Such a water dispenser can be seen generally in the Davis U.S. Pat. Nos. 6,085,540; 6,289,690 and 6,532,760 or the Shelton U.S. Pat. No. 6,561,382, each of which is hereby incorporated herein by reference.
Such a water dispenser per se is known having a cabinet housing a water containing reservoir, spigots for dispensing water from the reservoir to be consumed, a water supply for refilling the reservoir and in some versions a cooling system for refrigerating water that is contained in the reservoir or a heating system for heating water that flows from the reservoir.
In
Reservoir 11 has an interior 12. The reservoir 11 can provide a sidewall 13 that is preferably cylindrically shaped and a bottom wall 14. A curved corner 24 can be used to interface sidewall 13 and bottom wall 14.
An influent flow line 15 is an influent gas flow line that can be used to transport ozone (e.g. in a mixture with air) from a position within the cabinet of the water dispenser 10 or from a location next to the cabinet of the water dispenser 10. Influent gas flow line 15 connects to porous polymeric diffuser 18 with end cap 17 having stab fitting 16. The porous polymeric diffuser 18 is an elongated hollowed, tubular structure having a bore 26 that conveys an ozone or ozone and air mixture between end cap 17 and end cap 19.
Because the diffuser 18 is a porous polymeric material, it provides a large plurality of small pores 27 through which ozone and air in a mixture diffuse and then contact water contained in the interior 12 of reservoir 11. Diffuser 18 is thus contained within reservoir 11 below its water surface.
The porous polymeric diffuser 18 is supported with a plurality of supports 20, each having a bottom surface 21 and a vertical side surface 23. A curved corner surface 22 connects the surfaces 21, 23 and is sized and shaped to fit closely to and conform to the corner 24 of reservoir 11 as shown in
Supports 20 are spaced circumferentially about reservoir 11, each preferably contacting sidewall 13 and bottom wall 14 as shown in
The following is a list of parts and materials suitable for use in the present invention.
All measurements disclosed herein are at standard temperature and pressure, at sea level on Earth, unless indicated otherwise. All materials used or intended to be used in a human being are biocompatible, unless indicated otherwise.
The foregoing embodiments are presented by way of example only; the scope of the present invention is to be limited only by the following claims.
This is a continuation-in-part of co-pending U.S. patent application Ser. No. 09/996,328, filed on Nov. 28, 2001, which is a continuation-in-part of U.S. patent application Ser. No. 09/881,796, filed on Jun. 15, 2001, published as 2003-0000966 A1 on Jan. 2, 2003, now U.S. Pat. No. 6,561,382, and a continuation-in-part of U.S. patent application Ser. No. 09/954,849, filed on Oct. 18, 2001, published as 2002-0069664 A1 on Jun. 13, 2002, now U.S. Pat. No. 6,532,760, which is a continuation of U.S. patent application Ser. No. 09/472,320, filed on Dec. 23, 1999, now U.S. Pat. No. 6,289,690, which is a continuation-in-part of U.S. patent application Ser. No. 09/220,554, filed on Dec. 23, 1998, now U.S. Pat. No. 6,085,540. This is also a continuation-in-part of co-pending U.S. patent application Ser. No. 10/173,133, filed on Jun. 17, 2002, and published as 2003-0071069 A1 on Apr. 17, 2003, which is a continuation-in-part of U.S. patent application Ser. No. 09/996,328, filed on Nov. 28, 2001, which is a continuation-in-part of U.S. patent application Ser. No. 09/881,796, filed on Jun. 15, 2001, published as 2003-0000966 A1 on Jan. 2, 2003, now U.S. Pat. No. 6,561,382.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 09472320 | Dec 1999 | US |
| Child | 09954849 | Sep 2001 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 09996328 | Nov 2001 | US |
| Child | 11457365 | Jul 2006 | US |
| Parent | 09881796 | Jun 2001 | US |
| Child | 09996328 | Nov 2001 | US |
| Parent | 09954849 | Sep 2001 | US |
| Child | 09996328 | Nov 2001 | US |
| Parent | 09220554 | Dec 1998 | US |
| Child | 09472320 | Dec 1999 | US |
| Parent | 10173133 | Jun 2002 | US |
| Child | 11457365 | Jul 2006 | US |
| Parent | 09996328 | Nov 2001 | US |
| Child | 10173133 | Jun 2002 | US |
| Parent | 09881796 | Jun 2001 | US |
| Child | 09996328 | Nov 2001 | US |
