Dust collection in vacuum cleaners

• US 7,740,676 B2
• Filed: 09/27/2007
• Issued: 06/22/2010
• Est. Priority Date: 09/29/2006
• Status: Expired due to Fees

• Current Assignee: Vax Ltd. (Techtronic Industries Company Limited)
• Original Assignee: Vax Ltd. (Techtronic Industries Company Limited)
• Inventors: Irfan, Mohammed, Grove, Philip, Burnham, Gavin
• Primary Examiner(s): Hopkins; Robert A
• Application Number:
  US11/862,806
• Publication Number:
  US 20080078148A1
• Time in Patent Office: 999 Days
• Field of Search: 553/43, 553/45, 554/29, 554/32, 554/33, 554/591, 55D/IG.3
• US Class Current: 55/345
• CPC Class Codes: A47L 9/1633 Concentric cyclones
• CPC Class Codes: A47L 9/1683 Dust collecting chambers; Dust collecting receptacles
• CPC Class Codes: B04C 5/185 Dust collectors
• CPC Class Codes: B04C 5/26 for series flow
• CPC Class Codes: Y10S 55/03 Vacuum cleaner

Abstract

A cyclonic separator assembly for a vacuum cleaner, the assembly including a first cyclonic separator for effecting a first stage of dust separation from the suction airflow of the cleaner, and at least one further cyclonic separator for further separation of dust from the air flow following the first separator, and a receptacle for separated dust, the receptacle including respective receiving portions for receiving dust separated by the first separator and the further separator(s), wherein the respective portions of the dust receptacle are able to be emptied separately from one another.

Claims

1. A cyclonic separator assembly for a vacuum cleaner, comprising a first cyclonic separator for effecting a first stage of dust separation in communication with a suction airflow path within the cleaner, and a second cyclonic separator for separation of dust in communication with the first separator, and a receptacle configured to receive separated dust from the first and second separators, the receptacle comprising a first receiving portion configured to receive dust separated by the first separator, and a second receiving portion configured to receive dust separated by the second separator, wherein the first and second receptacles are configured to be emptied separately.

2. The cyclonic separator assembly of claim 1, wherein the receptacle comprises a first door configured to allow access to the first receiving portion and a second door configured to provide access to the second receiving portion, the first and second doors being openable separately from one another.

3. The separator assembly of claim 2, wherein the first and second doors are movable between a closed position to selectively block respective first and second openings disposed at the bottom of the receptacle, the first and second doors being movable to an alternate position for emptying of dust from the respective first and second portions of the receptacle.

4. The separator assembly of claim 2, wherein the first and second doors are each pivotally mounted to the receptacle, and further comprising a first and a second catch each disposed on the separator for holding the respective first and second doors in the closed position.

5. The separator assembly of claim 4, further comprising first and second releasing devices for releasing the respective first and second catches.

6. The separator assembly of claim 5, wherein the first and second devices are operable independently of one another.

7. The separator assembly of claim 5, wherein the first and second devices are operable only in a predetermined sequence.

8. The separator of claim 4, wherein the first and second doors are pivotably openable under gravity when the respective first and second catches are released.

9. The separator of claim 4, wherein each of the first and second doors are pivotably openable with a spring.

10. The separator of claim 1, wherein the respective first and second dust receiving portions of the receptacle are disposed concentrically with respect to each other.

11. The separator of claim 10, wherein the first door is generally annular and configured to selectively block the outer dust receiving portion, while the second door is configured to selectively block the inner dust receiving portion.

12. The separator of claim 11, wherein the outer dust receiving portion receives dust from the first separator, and the inner dust receiving portion receives dust from the second separator.