Air filter

• US 8,679,215 B2
• Filed: 04/13/2010
• Issued: 03/25/2014
• Est. Priority Date: 07/29/2009
• Status: Active Grant

• Current Assignee: Newform Techart Pte Ltd.
• Original Assignee: Newform Techart Pte Ltd.
• Inventors: Lim, Yeow Choon, Ou, Wee Chong, Teo, Eng Wah
• Primary Examiner(s): LAWRENCE JR, FRANK M
• Application Number:
  US13/387,513
• Publication Number:
  US 20120180666A1
• Time in Patent Office: 1,442 Days
• Field of Search: 961/08, 961/47, 961/51, 554/37, 554/39, 554/70, 554/71, 554/67, 554/73, 555/15, 555/29
• US Class Current: 55/470
• CPC Class Codes: B01D 2253/102 Carbon
• CPC Class Codes: B01D 2257/90 Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
• CPC Class Codes: B01D 2259/4566 for use in transportation means
• CPC Class Codes: B01D 53/0415 Beds in cartridges
• CPC Class Codes: B01D 53/0446 Means for feeding or distributing gases
• CPC Class Codes: B60H 3/0085 Smell or pollution preventing arrangements B60H3/0007, B60H3/0071, B60H3/02, B60H3/06 take precedence
• CPC Class Codes: B60H 3/06 Filtering B60H3/0078 takes precedence
• CPC Class Codes: F24F 8/97 for removing tobacco smoke

Abstract

An air filter having an inlet for air and an outlet for air comprises a body having a central channel, a first side with a first area, a second side having a second area, and a middle having a middle area, positioned between the first side and the second side. The middle area is less than the first area and less than the second area. A first fan is positioned in the body near the first side, and a second fan positioned in the body near the second side, and each fan blows air in the same direction. A filter cartridge is positioned in the central channel at the middle, wherein during operation air flows from the inlet to the filter cartridge to the outlet.

Claims

1. An air filter having an inlet for air and an outlet for air comprising in combination:

a body having a central channel, a first side, a second side, and a middle positioned between the first side and the second side, wherein a constriction is formed in the central channel at the middle;

a first fan positioned in the central channel near the first side,

a second fan positioned in the central channel near the second side, wherein each fan blows air in the same direction; and

a filter cartridge positioned in the central channel at the middle, wherein during operation air flows from the inlet to the filter cartridge to the outlet, and substantially all air blown from the first fan passes through the second fan.

2. The air filter of claim 1 wherein the filter cartridge comprises a perforated housing containing a filtering agent.

3. The air fitter of claim 2 wherein the filtering agent is one of activated carbon and charcoal.

4. The air filter of claim 2 wherein the perforated housing is provided with a plurality of perforations allowing air access to the filtering agent.

5. The air filter of claim 4 wherein the perforations are aligned in a direction generally perpendicular to a flow of the air.

6. The air filter of claim 1 further comprising an inlet cap at the inlet and an outlet cap at the outlet.

7. The air filter of claim 1 further comprising a first bracket, wherein the first fan is operatively connected to the filter cartridge by the first bracket.

8. The air filter of claim 7 wherein one of the first bracket and the filter cartridge has a plug, and the other of the first bracket and the filler cartridge has a socket, and the plug and socket connect together to secure first bracket to the filter cartridge.

9. The air filter of claim 7 further comprising a second bracket, wherein the second fan is operatively connected to the filter cartridge by the second bracket.

10. The air filter of claim 1 wherein the body comprises two halves, operatively connected near the middle.

11. The air filter of claim 1 further comprising inlet holes end outlet holes formed on the body, allowing air to pass.

12. The air filter of claim 11 wherein the inlet holes and the outlet holes extend circumferentially around the body.

13. The air filter of claim 1 further comprising a stand which supports the body in both a vertical position and a horizontal position perpendicular to the vertical position.

14. The air filter of claim 13 wherein the stand comprises a curved ledge and a recessed ledge, and the body has surfaces formed on the exterior of the body;

wherein the surfaces comprise a pair of circumferential surfaces one on each side of the body, and either circumferential surface engages the curved ledge of the stand and thereby supports the body in the vertical position.

15. The air filter of claim 14 wherein the surfaces comprise a curved exterior surface of the body positioned near the middle which engages the recessed ledge of the stand and thereby supports the body in the horizontal position.

16. The air filler of claim 10 wherein the body halves are releasably connected by snap fit connection.

17. The air filter of claim 1 wherein the filter cartridge comprises only one filter cartridge.

18. The air filter of claim 1 wherein an exterior surface of the body has an hour-glass shape.

19. The air filter of claim 1 wherein the central channel has a circular cross section.

20. The air filter of claim 1 wherein the filler cartridge is shaped with a wider center and ends remote from the center narrower then the center.

21. The air filter of claim 20 wherein the filter cartridge is egg shaped.

22. The air filter of claim 1 wherein the first fan and the second have a same size, and the central channel has a same cross sectional area at both the first fan and the second fan.

23. An air filter having an inlet for air and an outlet for air comprising, in combination:

a body having a central channel having a circular cross section, with a

constriction formed in the central channel at a middle between a first side and a second side;

a first fan positioned in the central channel near the first side;

a second fan positioned in the central channel near the second side, wherein each fan blows air in the same direction; and

a filter cartridge positioned in the central channel at the middle, and shaped with a wider center and ends remote from the center narrower than the center;

wherein the first fan and the second fan have a same size, the central channel has a same cross sectional area at both the first fan and the second fan, and during operation air flows from the inlet to the filter cartridge to the outlet, and substantially all air blown from the first fan passes through the second fan.

24. The air filter of claim 23 wherein the filter cartridge comprises a perforated housing containing a filtering agent comprising one of activated carbon and charcoal;

and

the perforated housing is provided with a plurality of perforations allowing air access to the filtering agent.

25. The air filter of claim 23 further comprising a first bracket, wherein both the first fan and the filter cartridge are directly connected to the first bracket.

26. The air filter of claim 25 further comprising a second bracket, wherein both the second fan and the filter cartridge are directly connected to the second bracket.

27. The air filter of claim 23 further comprising a stand which supports the body in both a vertical position and a horizontal position perpendicular to the vertical position.

28. The air filter of claim 23 wherein the filler cartridge comprises only one filter cartridge.

29. The air filter of claim 23 wherein the filter cartridge is egg shaped.