Dust collector with a constant suction force

Patent metadata

Field	Value
Publication number	US-10052579-B2
Application number	US-201213732248-A
Country	US
Kind code	B2
Filing date	Dec 31, 2012
Priority date	Oct 6, 2011
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A dust collector including a cylindrical cyclone tube, a central outlet channel, a swirl generator, and a swirl reflector is disclosed. The cylindrical cyclone tube can include one or more inlets. The central outlet channel includes a lower inlet end and an upper outlet end, wherein the upper outlet end is located above the one or more inlets. The swirl generator can be configured to generate a swirl between the cylindrical cyclone tube and the central outlet channel, the swirl generator configured to encircle the central outlet channel. The swirl reflector can be located near a bottom of the cylindrical cyclone tube and forming a particle chamber there below. A distance between the swirl reflector and the lower inlet end of the central outlet channel can be between ten to fifty percent of the length of the cylindrical cyclone tube from the one or more inlets to the swirl reflector.

First claim

What is claimed is:

1. A dust collector comprising:
an outer wall structure comprising a first cylindrical tube;
an inner wall structure comprising a second cylindrical tube that is within the outer wall structure;
an outlet tube disposed within the inner wall structure, wherein a portion of the outlet tube extends into the inner wall structure;
an inner hose lock coupled to a lower end of the inner wall structure; and
an inner bottom member coupled to the lower end of the inner wall structure;
wherein the inner hose lock is configured to be in a contracted configuration to prevent particles from traveling through the inner hose lock in response to a vacuum flow within the dust collector, and wherein the inner hose lock is configured to be in an expanded configuration, in response to the vacuum flow in the dust collector being released, where the inner hose lock is open to permit particles to travel through the inner hose lock; and
wherein the inner bottom member is configured to allow particles to pass through the inner bottom member and prevent the inner hose lock from entering the inner wall structure.

2. The dust collector of claim 1 , further comprising a dust collector inlet, wherein the dust collector inlet is in fluid communication with an inlet hose and a space formed between the outer wall structure and the inner wall structure.

3. The dust collector of claim 2 , wherein the dust collector inlet is disposed below an inlet edge of the inner wall structure.

4. The dust collector of claim 2 , wherein the dust collector inlet is located a predetermined distance below a top end of the inner wall structure.

5. The dust collector of claim 4 , wherein the top end of the inner wall structure is configured to be in fluid communication with the dust collector inlet in an operating configuration.

6. The dust collector of claim 5 , wherein the inner wall structure further includes a lower end that is configured to be sealed in the operating configuration.

7. The dust collector of claim 1 , further comprising an outer hose lock coupled to a lower end of the outer wall structure.

8. The dust collector of claim 7 , wherein the outer hose lock comprises a cylindrical elastic shell.

9. The dust collector of claim 8 , wherein the cylindrical elastic shell of the outer hose lock has a thickness of less than 2 millimeters.

10. The dust collector of claim 7 , wherein the outer hose lock expands from a contracted configuration to an expanded configuration, the contracted configuration corresponding to the operating configuration.

11. The dust collector of claim 7 , further comprising an outer bottom member coupled to the bottom of the outer wall structure, such that the outer bottom member is located internally to the outer hose lock, wherein the outer bottom member is a grate.

12. The dust collector of claim 11 , wherein the outer bottom member provides a structure against which the outer hose lock can press in the contracted configuration corresponding to the operating configuration and the outer bottom member being further configured to allow particles to pass through the lower end of the outer wall structure in a non-operating configuration in which there is no cyclone inside the outer wall structure.

13. The dust collector of claim 1
wherein the inner hose lock comprises a cylindrical elastic shell having a thickness of less than 2 millimeters.

14. The dust collector of claim 1 , further comprising the inner bottom member coupled to the lower end of the inner wall structure, such that the inner bottom member is located internally to the inner hose lock.

15. The dust collector of claim 1 , wherein the outlet tube is substantially centered relative to an inlet edge of the inner wall structure and swirl generator is disposed around the outlet tube.

16. The dust collector of claim 1 , further comprising a swirl generator disposed to fluidly couple an outer cyclone movement between the outer wall structure and the inner wall structure to an inner cyclone movement inside the inner wall structure, wherein the swirl generator is substantially flush with an inlet edge of the inner wall structure, wherein the inlet edge defines a top end of the inner wall structure.

17. The dust collector of claim 1 , wherein the inner hose lock does not comprise mechanical moving parts.

18. The dust collector of claim 16 , wherein the inner hose lock is further configured to be in the contracted configuration in response to the inner cyclone movement.

19. The dust collector of claim 1 , wherein, in the expanded configuration, the inner hose lock is open to permit dust to travel through the inner hose lock and into an outer hose lock coupled to a lower end of the outer wall structure.

20. A dust collector comprising:
an outer wall structure comprising a first cylindrical tube;
an inner wall structure comprising a second cylindrical tube that is within the outer wall structure;
an outlet tube disposed within the inner wall structure, wherein a portion of the outlet tube extends into the inner wall structure;
an outer hose lock coupled to a lower end of the outer wall structure; and
an outer bottom member coupled to the bottom of the outer wall structure, wherein the outer bottom member is located internally to the outer hose lock;
wherein the outer hose lock expands from a contracted configuration to an expanded configuration, the contracted configuration corresponding to an operating configuration;
wherein the outer bottom member provides a structure against which the outer hose lock presses when in the contracted configuration.

Assignees

• Husqvarna Ab

Inventors

• Hallgren Ingvar
• Johansson Daniel

Classifications

• B04C7/00

  Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00 · CPC title

• B04C5/22

  with cleaning means · CPC title

• B01D46/48

  Removing dust other than cleaning filters {, e.g. by using collecting trays} · CPC title

• B04C9/00

  Combinations with other devices, e.g. fans, {expansion chambers, diffusors, water locks}(with filters B01D50/00) · CPC title

• B01D46/2411

  Filter cartridges · CPC title