CA2670689A1

CA2670689A1 - Duct cleaning attachment for a vacuum

Info

Publication number: CA2670689A1
Application number: CA2670689A
Authority: CA
Inventors: Gabe Coscarella
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-03
Filing date: 2009-06-03
Publication date: 2011-01-03
Also published as: US20100306954A1; CA2707626A1

Abstract

A duct cleaning attachment includes a hollow body having an exterior surface with a curved under-belly, one of a tapered or rounded leading end, a trailing end, and an interior surface defining an interior cavity. A coupling is positioned at the trailing end wherein the body is coupled to a hose from a vacuum source in a manner that results in air being drawn from the interior cavity by the vacuum source. The body has openings from the exterior surface to the interior surface.

Description

TITLE
[0001] Duct cleaning attachment for a vacuum FIELD

[0002] Attachment for a vacuum, such as a household vacuum, that is used to clean ducts.
BACKGROUND

[0003] U.S. patent no. 4,792,363 describes a vent cleaning system that uses a rotating brush attached to a vacuum source.
SUMMARY

[0004] There is provided a duct cleaning attachment that comprises a hollow body having an exterior surface with a curved under-belly, one of a tapered or rounded leading end, a trailing end, and an interior surface defining an interior cavity. A coupling is positioned at the trailing end wherein the body is coupled to a vacuum source in a manner that results in air being drawn from the interior cavity by the vacuum source. The body has openings from the exterior surface to the interior surface.

[0005] According to another aspect, there is provided a duct cleaning attachment for a vacuum comprising a tapered leading end, a tapered trailing end having an attachment sized to attach to a hose of a household vacuum cleaner, and a vacuum section disposed between the tapered leading end and the tapered trailing end. The vacuum section has at least one vacuum opening. The vacuum section is larger in diameter than the tapered leading end and the tapered trailing end.

[0006] According to another aspect, there is provided a duct cleaning attachment for a vacuum as described above in combination with a household vacuum cleaner.

[0007] Other aspects will be apparent from the description, drawings, and claims.
BRIEF DESCRIPTION OF THE DRAWINGS

[0008] These and other features will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to be in any way limiting, wherein:
FIG. 1 is a side view of a duct cleaning attachment in a duct.
FIG. 2 is a detailed side elevation view of a duct cleaning attachment.
FIG. 3 is a detailed side elevation view of an alternative duct cleaning attachment.
FIG. 4 is a detailed side elevation view of an alternative duct cleaning attachment.
FIG. 5 and 6 are detailed side elevation views of an alternative duct cleaning attachment with a sliding brush.
FIG. 7 is a detailed side elevation view of an alternative duct cleaning attachment.
FIG. 8 is a detailed side elevation view of an alternative duct cleaning attachment integrally formed with a hose.

DETAILED DESCRIPTION

[0009] A duct cleaning attachment for a vacuum generally identified by reference numeral 10 will now be described with reference to FIG. 1 through 8.
Structure and Relationship of Parts:

[0010] Referring to FIG. 1 and 2, duct cleaning attachment 10 includes a tapered leading end 12 and a tapered trailing end 14 on a hollow body 15 that has an attachment 16 sized to attach to a hose 18 of a vacuum source, such as a household vacuum cleaner 19 in a manner that results in air being drawn from the interior cavity of body 15 by vacuum source 19, and a vacuum section 20 disposed between tapered leading end 12 and tapered trailing end 14. As shown, tapered trailing end 14 tapers down to attachment 16, while tapered leading end 12 may taper to a flat surface, or may also terminate in a rounded snub-nose, or a point (not shown). Vacuum section 20 has at least one vacuum opening 22 and is shown to be larger in diameter than tapered leading end 12 and tapered trailing end 14.

[0011] As can be seen in FIG. 2, vacuum section 20 is cylindrical in shape, and leading and trailing ends 12 and 14 taper away in a partial cone. It will be understood, however, that many different shapes may be used. For example, referring to FIG. 3, which shows a substantially circular attachment 10, leading and trailing ends 12 and 14 may be curved such that attachment 10 takes a bulbous shape, and vacuum section 20 may not be inherently distinct from these ends. It will be understood that body 15 may not be circular. For example, it may have a rounded bottom surface with a flatter top surface (not shown).

[0012] Trailing end 12 need not be curved or tapered. Referring to FIG. 8, trailing end 12 need not reduce at all. In the depicted embodiment, body 15 of attachment 10 includes a flexible hose portion 21, although it will be understood that this also applies to rigid attachments as shown in the other figures. Another feature shown in FIG. 8 is the use of additional holes 23 spaced along flexible hose 21 away from leading end 12.
Additional holes 23 may also be used with a rigid attachment 10 that is long enough, however the length of attachment 10 with a rigid body 15 will be limited by the anticipated curves that must be negotiated in the ductwork. If a longer body 15 is desired, body 15 may be flexible or resilient to allow the curves in the ductwork to be negotiated.

[0013] Referring to FIG. 4, vacuum section 20 may include a reduced diameter section, or recess 24 in which vacuum openings 22 are positioned. In this situation, the diameter of vacuum section 20 is defined by the largest edges of ends 12 and 14. As can be seen, each variation has a round cross-section throughout its length. This allows them to be used without trying to maintain the proper orientation. Referring to FIG. 5 and 6, a brush 25 may be positioned in recess 24. As depicted, brush 25 is positioned on a sleeve 27 that is slidable along recess 24. As attachment 10 is pushed or pulled through a duct, brush 25 moves to the leading end side or trailing end side of recess 24. Alternatively, brush 25 may be fixed in a desired position, and need not be positioned in a recess 24.

[0014] Referring again to FIG. 2, it will be understood that other vacuum openings 22 may be provided in attachment 10, such as on leading end 12. The number and size of openings 22, as well as the position, will depend upon the available vacuum pressure from household vacuum cleaner 19, the desired vacuum pressure applied by the various vacuum openings 22, and the direction or location that the pressure is applied.

Operation:

[0015] Referring to FIG. 1, attachment 16 at trailing end 12 is attached to hose 18. Duct cleaning attachment 10 is then inserted into a household duct 26 to be cleaned. Tapered ends 12 and 14 allow duct cleaning attachment 10 to pass over screws 28 or other protrusions such as bent edges of ducting that may be positioned within duct 26 without getting caught as it is being inserted or withdrawn, and also facilitates the negotiation of bends in duct 26 as it is pushed through.

[0016] Preferably, the largest diameter of duct cleaning attachment 10, which is the diameter of vacuum section 20, is less than half the height of a diameter of household duct 26.
This allows duct cleaning attachment 10 to pass under or around any dampers 30 that may be positioned in duct 26.

Advantages:

[0017] Prior art duct and vent cleaners use brushes to loosen any dust or debris in a vent, to clean the entire vent. However, most dust and debris settle on the bottom of the duct or vent. The apparatus described herein allows a user to clean the majority of the dust and debris in the vents by using a much simpler and less costly design. This does not remove the need to periodically clean the entire vent, however it allows a user to delay a more costly cleaning by removing the majority of dust and debris until it becomes necessary to do so.
As the apparatus is designed to attach to household vacuum cleaners, users who already own a vacuum cleaner are not required to purchase anything aside from the attachment.

[0018] In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.

[0019] The following claims are to be understood to include what is specifically illustrated and described above, what is conceptually equivalent, and what can be obviously substituted. Those skilled in the art will appreciate that various adaptations and modifications of the described embodiments can be configured without departing from the scope of the claims. The illustrated embodiments have been set forth only as examples and should not be taken as limiting the invention. It is to be understood that, within the scope of the following claims, the invention may be practiced other than as specifically illustrated and described.

Claims

1. A duct cleaning attachment, comprising:
a hollow body having an exterior surface with a curved under-belly, one of a tapered or rounded leading end, a trailing end, and an interior surface defining an interior cavity;
a coupling positioned at the trailing end wherein the body is coupled to a vacuum source in a manner that results in air being drawn from the interior cavity by the vacuum source; and openings in the body from the exterior surface to the interior surface.

2. The duct cleaning attachment of Claim 1, wherein the trailing end is one of tapered or rounded.

3. The duct cleaning attachment of Claim 1, wherein the body is cylindrical with a central reduced diameter section and the openings are positioned in the reduced diameter section.

4. The duct cleaning apparatus of Claim 3, wherein brush comprised of a sleeve that overlies the reduced diameter section and has outwardly extending bristles.

5. The duct cleaning apparatus of Claim 4, wherein the sleeve slides to assume a position either on a leading end side or on a trailing end side of the openings.

6. The duct cleaning apparatus of Claim 1, wherein the leading end is bulbous.

7. The duct cleaning apparatus of Claim 1, wherein the body comprises a flexible hose.

8. The duct cleaning apparatus of Claim 1, wherein the body is coupled to a hose of the vacuum source.

9. A duct cleaning attachment for a vacuum, comprising:

a leading end, the leading end being one of tapered our rounded;
a trailing end having an attachment sized to attach to a hose of a household vacuum cleaner; and a vacuum section disposed between the tapered leading end and the tapered trailing end, the vacuum section having at least one vacuum opening.

10. The duct cleaning attachment of Claim 9, wherein the trailing end is one of tapered or rounded.

11. The duct cleaning attachment of Claim 9, wherein the vacuum opening is disposed in a recess of the vacuum section.

12. The duct cleaning attachment of Claim 9, wherein the leading end, the trailing end and the vacuum section are substantially spherical.

13. The duct cleaning attachment of Claim 9, wherein the diameter of the vacuum section is less than half the height of a diameter of a household duct.

14. In combination, a household vacuum cleaner having a vacuum hose; and a duct cleaning attachment for the vacuum hose, comprising:
a tapered leading end;
a tapered trailing end having an attachment sized to attach to a hose of a household vacuum cleaner; and a vacuum section disposed between the tapered leading end and the tapered trailing end, the vacuum section having at least one vacuum opening.