Pre-filter bag for vacuum cleaner and vacuum cleaner including same

Patent metadata

Field	Value
Publication number	US-10653281-B2
Application number	US-201715686749-A
Country	US
Kind code	B2
Filing date	Aug 25, 2017
Priority date	Aug 25, 2017
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

A vacuum cleaner includes a canister, a power head connected to a top of the canister, an inlet defined by one of the canister and the power head, an outlet defined by one of the canister and the power head, and a pre-filter bag disposed within the canister and fluidly connected between the inlet and the outlet. The power head includes an impeller assembly operable to generate airflow through the canister from the inlet to the outlet. The pre-filter bag includes an inlet port connected to the inlet, a radial inner wall, and a radial outer wall. The radial inner wall and the radial outer wall at least partially define an internal cavity and extend circumferentially about a central axis of the pre-filter bag such that the internal cavity forms a continuous, closed loop.

First claim

What is claimed is:

1. A vacuum cleaner comprising:
a canister;
a power head connected to a top of the canister and including an impeller assembly;
an inlet defined by one of the canister and the power head;
an outlet defined by one of the canister and the power head, wherein the impeller assembly is operable to generate airflow through the canister from the inlet to the outlet; and
a pre-filter bag disposed within the canister and fluidly connected between the inlet and the outlet, the pre-filter bag including:
an inlet port connected to the inlet;
a radial inner wall; and
a radial outer wall, wherein the radial inner wall and the radial outer wall at least partially define an internal cavity and extend around a central axis of the pre-filter bag such that the internal cavity forms a continuous, closed loop that promotes cyclonic airflow throughout the continuous, closed loop, wherein the pre-filter bag is toroid-shaped and defines a central cavity separated from the internal cavity by the radial inner wall, the central cavity sized and shaped to receive a cylindrical vacuum filter therein.

2. The vacuum cleaner of claim 1 , further comprising a filter connected to and depending from the power head, wherein the filter is received within the central cavity.

3. The vacuum cleaner of claim 1 , wherein the pre-filter bag is removable from the canister.

4. The vacuum cleaner of claim 1 , wherein the inlet includes a flow-guide section operable to direct air flowing through the canister in a cyclonic flow.

5. The vacuum cleaner of claim 1 , wherein the pre-filter bag further includes a flow guide connected to the inlet port and operable to re-direct air entering the pre-filter bag to create a cyclonic air flow within the pre-filter bag.

6. The vacuum cleaner of claim 1 , wherein the pre-filter bag further includes a bottom wall extending radially inward from the radial outer wall to the radial inner wall.

7. The vacuum cleaner of claim 6 , wherein the bottom wall is pleated to accommodate radial expansion of the pre-filter bag.

8. The vacuum cleaner of claim 1 , wherein the pre-filter bag is constructed of flexible filter media.

9. A pre-filter bag for a vacuum cleaner, the pre-filter bag comprising:
an inlet port that connects to an inlet of the vacuum cleaner;
a radial inner wall; and
a radial outer wall, wherein the radial inner wall and the radial outer wall at least partially define an internal cavity and extend around a central axis of the pre-filter bag such that the internal cavity forms a continuous, closed loop that promotes cyclonic airflow throughout the continuous, closed loop, wherein the pre-filter bag defines a central cavity separated from the internal cavity by the radial inner wall, the central cavity sized and shaped to receive a cylindrical vacuum filter therein.

10. The pre-filter bag of claim 9 , wherein the inlet port is located on the radial outer wall.

11. The pre-filter bag of claim 9 , wherein the pre-filter bag further includes a flow guide connected to the inlet port and operable to re-direct air entering the pre-filter bag to create a cyclonic air flow within the pre-filter bag.

12. The pre-filter bag of claim 9 , wherein the pre-filter bag further includes a bottom wall extending radially inward from the radial outer wall to at least the radial inner wall.

13. The pre-filter bag of claim 12 , wherein the pre-filter bag further includes an internal wall extending radially inward from a lower edge of the radial inner wall, wherein the internal wall is spaced from the bottom wall by the internal cavity of the pre-filter bag.

14. The pre-filter bag of claim 12 , wherein the bottom wall extends from the radial outer wall to the radial inner wall.

15. The pre-filter bag of claim 12 , wherein the bottom wall is pleated to accommodate radial expansion of the pre-filter bag.

16. The pre-filter bag of claim 9 , wherein the pre-filter bag is constructed of flexible filter media.

17. The pre-filter bag of claim 9 , wherein the pre-filter bag is toroid-shaped.

18. The pre-filter bag of claim 9 including:
a top wall extending radially inward from the radial outer wall to the radial inner wall; and
a bottom wall extending radially inward from the radial outer wall to at least the radial inner wall,
wherein at least one of the radial inner wall, the radial outer wall, the top wall, and the bottom wall is pleated to accommodate at least one of radial and axial expansion of the pre-filter bag.

19. A filter bag for a vacuum cleaner, the filter bag comprising:
an inlet port that connects to an inlet of the vacuum cleaner;
a radial inner wall; and
a radial outer wall, wherein the radial inner wall and the radial outer wall at least partially define an internal airflow cavity and extend around a central axis of the filter bag such that the internal airflow cavity extends circumferentially completely around the central axis and forms a continuous, closed loop that promotes cyclonic airflow throughout the continuous, closed loop, wherein the filter bag defines a central cavity separated from the internal cavity by the radial inner wall.

20. The filter bag of claim 19 , wherein the inlet port is located on the radial outer wall.

21. The filter bag of claim 19 further including a flow guide connected to the inlet port and operable to re-direct air entering the filter bag to create a cyclonic air flow within the filter bag.

22. The filter bag of claim 19 , wherein the filter bag further includes a bottom wall extending radially inward from the radial outer wall to at least the radial inner wall.

23. The filter bag of claim 22 , wherein the filter bag further includes an internal wall extending radially inward from a lower edge of the radial inner wall, wherein the internal wall is spaced from the bottom wall by the internal cavity of the filter bag.

24. The filter bag of claim 22 , wherein the bottom wall is pleated to accommodate radial expansion of the filter bag.

25. The filter bag of claim 19 , wherein the filter bag is toroid-shaped.

Assignees

• Emerson Electric Co

Inventors

• Gierer Joseph T
• Henke Daniel M
• Hill Jason E

Classifications

• A47L5/362 Primary

  of the horizontal type, e.g. canister or sledge type · CPC title

• A47L7/0004

  Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners (floor-scrubbing machines taking-up dirty liquid by suction A47L11/30) · CPC title

• A47L9/22

  Mountings for motor fan assemblies · CPC title

• A47L5/365

  of the vertical type, e.g. tank or bucket type · CPC title

• A47L9/14 Primary

  Bags or the like; {Rigid filtering receptacles;} Attachment of, or closures for, bags {or receptacles} · CPC title