UV liquid storage and dispensing device

• US 8,177,966 B2
• Filed: 12/21/2010
• Issued: 05/15/2012
• Est. Priority Date: 02/25/2009
• Status: Expired due to Fees

• Current Assignee: Mr. Chiaphua Industries Limited
• Original Assignee: Mr. Chiaphua Industries Limited
• Inventors: Wu, Ka Shing
• Primary Examiner(s): Popovics, Robert James
• Application Number:
  US12/974,075
• Publication Number:
  US 20110084006A1
• Time in Patent Office: 511 Days
• Field of Search: None
• US Class Current: 210/88
• CPC Class Codes: C02F 1/003 using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices C02F9/20 takes precedence
• CPC Class Codes: C02F 1/283 using coal, charred products, or inorganic mixtures containing them
• CPC Class Codes: C02F 1/32 with ultraviolet light
• CPC Class Codes: C02F 1/42 by ion-exchange ion-exchange in general B01J
• CPC Class Codes: C02F 2201/009 Apparatus with independent power supply, e.g. solar cells, windpower, fuel cells for electrolysis apparatus C02F2201/46165
• CPC Class Codes: C02F 2201/326 Lamp control systems
• CPC Class Codes: C02F 2307/04 as part of a pitcher or jug
• CPC Class Codes: Y02A 20/212 Solar-powered wastewater sewage treatment, e.g. spray evaporation

Abstract

A liquid storage and dispensing device with a filter for removing minerals and a UV light source for killing pathogens existing in a liquid. A liquid is introduced into the device via the inlet. The liquid passes through the filter into a collector. The filtered liquid flows from the collector through a thru passage into a UV chamber. The UV light source emits UV rays through a UV transmissive wall into the interior portion of the UV chamber. Exposure to the UV light kills pathogens present in the filtered liquid. Substantially purified liquid can then be dispensed from an outlet.

Claims

1. A water pitcher purifier comprising:

a water pitcher having a base, body, handle and spout;

an incoming reservoir housed in an upper portion of said body for receiving water to be treated or purified, said reservoir having an opening in a bottom wall thereof;

a chamber located completely beneath said incoming reservoir and having a protrusion extending upwardly from a bottom surface of said chamber, said chamber having an exit opening in a sidewall thereof;

a filter extending through said incoming reservoir opening into said chamber, said filter having an inlet in fluid communication with said incoming reservoir, said filter having an outlet at a lower end thereof, a gap opening is defined between said protrusion and an outer bottom surface of said filter; and

an ultraviolet light source which emits ultraviolet light capable of killing pathogens present in water being treated, said protrusion and said filter divide said chamber into a collector compartment located beneath said filter and an ultraviolet treatment compartment adjacent said filter where said ultraviolet light source is housed;

wherein water to be treated or purified is introduced into said incoming reservoir and follows a liquid flow path having a plurality of openings in addition to said gap opening, flowing through said filter into said collector compartment, then through said gap opening into said ultraviolet treatment compartment where the filtered water is subjected to pathogen killing ultraviolet light, and then out through said exit opening into a lower collection reservoir adjacent said base where treated water is stored until it is dispensed through said spout.

2. The water pitcher of claim 1, wherein the filter is removable and replaceable.

3. The water pitcher purifier of claim 1, wherein the filter comprises granular activated carbon and ion exchange resin.

4. The water pitcher purifier of claim 1, wherein the gap opening and the exit opening are sufficiently narrow so that filtered water remains in the ultraviolet treatment compartment for a duration sufficient for the ultraviolet light to kill 99% of the pathogens present in the water prior to dispensing from the exit opening.

5. The water pitcher purifier of claim 1, wherein the ultraviolet light source is removable and replaceable.

6. The water pitcher purifier of claim 1 or 5, wherein the ultraviolet light source further comprises a rechargeable power source.

7. The water pitcher purifier of claim 1, further comprising a safety device that prevents the ultraviolet light source from illuminating when the ultraviolet light source is not properly engaged.

8. The water pitcher purifier of claim 1, wherein the ultraviolet light source further comprises a rechargeable power source and a safety device that measures the capacity of said power source and provides a warning when the power source is too low to power the ultraviolet light source and/or when the power source is too low to complete a coming sterilizing cycle by ultraviolet light.

9. The water pitcher purifier of claim 1, wherein the ultraviolet light source emits light in the ultraviolet-C frequency.

10. The water pitcher purifier of claim 1, further comprising a meter for recording the number times that the purifier is used and providing notification to a user.

11. The water pitcher purifier of claim 10, wherein the meter provides notification to a user in terms of the number of safe uses remaining before an element of the purifier should be replaced.

12. The water pitcher purifier of claim 1, wherein the duration of time that the liquid being treated is exposed to ultraviolet radiation is regulated by the shape or cross-sectional area of at least one opening in said liquid flow path.

13. The water pitcher purifier of claim 12, wherein the duration of time that the liquid being treated is exposed to ultraviolet radiation is regulated by the shape or cross-sectional area of all openings in said liquid flow path.

14. The water pitcher purifier of claim 12, wherein the duration of time that the liquid being treated is exposed to ultraviolet radiation is regulated by the shape or cross-sectional area of said gap opening in said liquid flow path.