Cyclonic chamber for air filtration devices

• US 8,167,964 B2
• Filed: 04/09/2009
• Issued: 05/01/2012
• Est. Priority Date: 04/09/2009
• Status: Active Grant

• Current Assignee: Lau Ying Wai
• Original Assignee: Lau Ying Wai
• Inventors: Wai, Lau Ying
• Primary Examiner(s): Greene, Jason M
• Assistant Examiner(s): Bui, Dung H
• Application Number:
  US12/800,569
• Publication Number:
  US 20100257825A1
• Time in Patent Office: 1,118 Days
• Field of Search: 553/01, 553/04, 553/05, 554/33, 554/75, 554/87, 553/00, 55D/IG.3, 210/350, 952/78, 952/82, 153/44, 153/47, 153/52
• US Class Current: 55/337
• CPC Class Codes: A47L 9/1608 Cyclonic chamber constructions
• CPC Class Codes: A47L 9/1666 with filtering means
• CPC Class Codes: B01D 2275/201 Conical shape
• CPC Class Codes: B01D 2279/55 for cleaning appliances, e.g. suction cleaners suction cleaners comprising filters A47L9/10
• CPC Class Codes: B01D 45/12 by centrifugal forces centrifuges B04B; cyclones B04C
• CPC Class Codes: B01D 46/02 Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
• CPC Class Codes: B01D 50/20 Combinations of devices covered by groups B01D45/00 and B01D46/00
• CPC Class Codes: B04C 2009/004 with internal filters, in the cyclone chamber or in the vortex finder
• CPC Class Codes: Y10S 55/03 Vacuum cleaner

Abstract

A cyclonic chamber for use in air filtration devices. The chamber includes an apex opposite a base with sidewalls extending therebetween. The cyclonic chamber is preferably parabolic in cross-section or tubular with a hemi-spherical cap. The base contains an outflow passage and a conical filter extending therefrom. An inflow passage is provided proximate the apex. The inflow and outflow passages are parallel but not aligned. The chamber interior is smooth. The smooth interior and offset relationship of the inflow and outflow passages causes air to take a cyclonic path between the inflow passage and the filter. Debris in the airstream is pushed outward—away from the filter—by centripetal force. Eddies form proximate the base. Debris escapes the airstream there, where it either remains or, depending upon the chamber'"'"'s orientation relative to gravity, falls back into the airflow where it is again directed away from the filter.

Claims

1. A cyclonic dust collection chamber for use with a vacuum source wherein the chamber comprises:

a base opposite an apex and sidewalls extending therebetween, said apex and sidewalls having interior surfaces, wherein said interior surfaces are substantially smooth;

an outflow passage extending from said base toward said apex, said outflow passage having an outflow aperture distal from said base;

said outflow aperture further having a longitudinal axis;

an inflow passage extending from an inflow aperture contained in said sidewalls proximate said apex away from said base, said inflow passage having a longitudinal axis, wherein said longitudinal axes of said inflow passage and said outflow passage are substantially parallel and wherein said longitudinal axes of said inflow passage and said outflow passage are not aligned;

a filter positioned over said outflow aperture whereby air exiting said chamber via said outflow aperture must pass through said filter;

wherein said vacuum source is in operative fluid engagement with said outflow passage whereby operation of said vacuum source will draw air into said chamber via said inflow passage;

through said chamber along a cyclonic path; and

out of said chamber via said outflow passage; and

wherein said interior surfaces of said apex and said sidewalls are substantially free of any aerodynamic obstructions protruding therefrom.

2. A cyclonic dust collection chamber for use with a vacuum source according to claim 1 wherein said chamber is substantially tubular in cross section.

3. A cyclonic dust collection chamber for use with a vacuum source according to claim 1 wherein said chamber is substantially parabolic in cross section.

4. A cyclonic dust collection chamber for use with a vacuum source according to claim 1 wherein said filter is substantially conical.

5. A cyclonic dust collection chamber for use with a vacuum source according to claim 1 wherein said cyclonic dust collection chamber is contained with a vacuum cleaner.

6. A cyclonic dust collection chamber for use with a vacuum source according to claim 5 further comprising at least one vacuum attachment operatively and fluidly connected to said inflow passage.

7. A cyclonic dust collection chamber for use with a vacuum source according to claim 1 wherein said filter is substantially parabolic in cross section.

8. A cyclonic dust collection chamber for use with a vacuum source according to claim 7 wherein said filter has an exterior surface that is substantially smooth.

9. A cyclonic dust collection chamber for use with a vacuum source according to claim 7 wherein said filter has an exterior surface that is substantially smooth.

10. A cyclonic dust collection chamber for use with a vacuum source according to claim 7 wherein said vacuum attachment is a motorized brush.