WO2008070971A1 - Sound dampening passage and surface cleaning apparatus with same - Google Patents
Sound dampening passage and surface cleaning apparatus with same Download PDFInfo
- Publication number
- WO2008070971A1 WO2008070971A1 PCT/CA2007/002213 CA2007002213W WO2008070971A1 WO 2008070971 A1 WO2008070971 A1 WO 2008070971A1 CA 2007002213 W CA2007002213 W CA 2007002213W WO 2008070971 A1 WO2008070971 A1 WO 2008070971A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sound
- passage
- sound dampening
- surface cleaning
- cleaning apparatus
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/225—Convertible suction cleaners, i.e. convertible between different types thereof, e.g. from upright suction cleaners to sledge-type suction cleaners
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
- A47L5/32—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle with means for connecting a hose
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
- A47L5/365—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the vertical type, e.g. tank or bucket type
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1608—Cyclonic chamber constructions
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/165—Construction of inlets
Definitions
- the invention relates to a surface cleaning apparatus and to sound dampening passages downstream from fluid flow motors.
- the invention relates to a surface cleaning apparatus that has a sound dampening passage that comprises an outer sound reflecting material and an inner sound absorbing material.
- Such apparatuses include vacuum cleaners such as upright vacuum cleaners, hand or strap carryable vacuum cleaners, wet-dry vacuum cleaners, and carpet extractors, amongst others. These apparatuses typically include at least one suction or fluid flow motor. Generally, the motor produces a significant amount of noise, which can be uncomfortable to a user. For example, many full size vacuum cleaner use a 1OA - 13A motor.
- a filter such as a HEPA filter downstream from the suction motor.
- the filter is provided to collect fine particulate matter that is in the air stream that exits the vacuum cleaner, such as carbon dust.
- plastic housings of varying design have been suggested to surround a suction motor of a vacuum cleaner, so as to function as a sound shield. These designs add weight to the vacuum cleaner and provide an additional wall between the suction motor and the exterior of the vacuum cleaner.
- a surface cleaning apparatus comprising a fluid flow path extending from a dirty fluid inlet to a clean air outlet and including a suction motor. At least one cleaning stage is positioned in the fluid flow path.
- the suction motor is positioned in a housing of the surface cleaning apparatus and upstream of the clean air outlet.
- a sound dampening passage is provided downstream from the suction motor and in fluid flow communication with the clean air outlet. At least a portion of the sound dampening passage comprises a first layer of a sound reflecting material and an inner layer of sound absorbing material.
- Embodiments in accordance with this broad aspect are advantageous because the sound dampening passage may reduce the amount of sound exiting the clean air outlet. Accordingly, a user may perceive the surface cleaning apparatus to be less noisy, and therefore the surface cleaning apparatus may be more comfortable and acceptable.
- the passage comprises at least a pair of opposed walls wherein each wall comprises a first layer of a sound reflecting material and an inner layer of sound absorbing material.
- the sound reflecting material is selected from plastic and metal. In some embodiments, the sound absorbing material is selected from foam, rubber, silicone, a member having pockets filled will one of air or fluid and combinations thereof.
- the sound dampening passage comprises a longitudinally extending conduit interior of the housing having continuous sidewalls.
- the sound dampening passage is positioned exterior to the housing downstream of the clean air outlet.
- the sound dampening passage extends between an outer wall of the surface cleaning apparatus and a sound dampening panel mounted to the surface cleaning apparatus and the sound dampening panel comprises a first outer layer of a sound reflecting material and the inner layer of sound absorbing material.
- the sound dampening panel is removably mounted to the surface cleaning apparatus. Such embodiments may be advantageous because a user may remove the sound dampening panel in order to clean out the clean air outlet or a post motor filter provided therein.
- the sound dampening passage extends at an angle to a direction of airflow entering the sound dampening passage. In further embodiments, the angle is greater than 15°. In further embodiments, the angle is about 90°.
- the sound dampening passage extends linearly. In some embodiments, the sound dampening passage has at least a curved section. For example, it may be helical, e.g., extending around part or all of the outer circumference of the surface cleaning apparatus.
- the sound dampening passage has a cross sectional area transverse to its longitudinal extent that decreases in a downstream direction. In other embodiments, the sound dampening passage has a cross sectional area transverse to its longitudinal extent that increases in a downstream direction. For example, if the passage is circular in cross section, the diameter may increase or decrease in the downstream direction. Alternately, in some embodiments, the cross section may remain generally constant.
- a sound dampening passage positionable downstream from a fluid flow motor.
- the sound dampening passage comprises at least a pair of opposed walls.
- Each wall comprises a first layer of a sound reflecting material and at least one, and preferably each opposed wall, is provided with an inner layer of sound absorbing material.
- the sound reflecting material is selected from plastic and metal. In some embodiments, the sound absorbing material is selected from foam, rubber, silicone, a member having pockets filled will one of air or fluid and combinations thereof. In some embodiments, the sound dampening passage comprises a longitudinally extending conduit interior of a housing of the fluid flow motor having continuous sidewalls.
- the sound dampening passage is positioned exterior to a housing of the fluid flow motor and downstream of an air outlet of the housing.
- the sound dampening passage extends between an outer wall of the housing and a sound dampening panel spaced from the housing and the sound dampening panel comprises the first layer of a sound reflecting material and the inner layer of sound absorbing material.
- the sound dampening panel is removably mounted.
- the sound dampening passage extends at an angle to a direction of airflow entering the sound dampening passage. In some embodiments, the angle is greater than 15°. In further embodiments, the angle is about 90°.
- the sound dampening passage extends linearly. In some embodiments, the sound dampening passage has at least a curved section.
- the sound dampening passage has a cross sectional area transverse to its longitudinal extent that decreases in a downstream direction. In other embodiments, the sound dampening passage has a cross sectional area transverse to its longitudinal extent that increases in a downstream direction.
- Figure 1 is a perspective view of an embodiment of a surface cleaning apparatus in accordance with the present invention
- Figure 2 is a perspective view of an alternate embodiment of a surface cleaning apparatus in accordance with the present invention
- Figure 3 is a front elevation of the embodiment of Figure 1 ;
- Figure 4 is a rear elevation of the embodiment of Figure 1 ;
- Figure 5 is a top plan view of the surface cleaning head of Figure 1 ;
- Figure 6 is a cross section taken along line 6-6 in Figure 1 ;
- Figure 7 is a side elevation of the embodiment of Figure 1 ;
- Figure 8 is a cross section taken along line 8-8 in Figure 1 ;
- Figure 9 is a side elevation of the embodiment of Figure 1 , showing a dirt chamber in an open position;
- Figure 10 is a perspective view of the embodiment shown in Figure
- Figure 11A is a cross section taken along line 9-9 in Figure 1 , showing a direction of airflow through a suction motor housing;
- Figure 11B is an exploded view of the suction motor housing of Figure 11A; and Figures 12-15 are cross sections taken along line 12-12 in Figure 1 , showing alternate embodiments of a sound dampening passage.
- the sound dampening passage is useable in various household appliances and tools wherein air is expelled from the apparatus.
- the air is drawn past a fluid flow motor and then travels through a passage to the ambient.
- Part, and preferably all, of the passage is constructed as disclosed herein.
- the passage of the air through the passage reduces the noise level perceived by a user of the apparatus.
- the passage is used in a surface cleaning apparatus. Any surface cleaning apparatus or any configuration may be used.
- the upright vacuum cleaners shown in Figures 1 - 10 merely exemplify the application of the sound passage as an exterior part provided on an upright vacuum cleaner. It will be appreciated that such a design may be useful as a retrofit to existing models.
- the passage may be provided internal of the housing of the vacuum cleaner.
- the design may be used with an upright surface cleaning apparatus, a canister surface cleaning apparatus, a stick vac, a back pack vacuum cleaner, a wet/dry or shop vac style surface cleaning apparatus, a carpet extractor, a hand or strap carriable surface cleaning apparatus or other type of surface cleaning apparatus.
- surface cleaning apparatus 10 comprises a dirty fluid inlet 12, and a clean air outlet 14.
- a fluid flow path extends from the dirty fluid inlet to the clean air outlet.
- the dirty fluid inlet 12 is provided in a surface cleaning head 16, and clean air outlet 14 is provided in an upright section 18.
- clean air outlet 14 may be provided in surface cleaning head 16.
- both dirty fluid inlet 12 and clean air outlet 14 may be provided, for example, in a main housing for the surface cleaning apparatus.
- the fluid flow path comprises a suction motor 20, and at least one cleaning stage 22. Fluid from dirty fluid inlet 12 is directed to the at least one cleaning stage 22.
- an upflow duct 24 is mounted between surface cleaning head 16 and cleaning stage 22 for providing fluid communication therebetween.
- an upflow duct may not be provided, and the dirty fluid inlet may be in direct fluid communication with the cleaning stage.
- fluid passes directly from dirty fluid inlet 12 to cleaning stage 22 via upflow duct 24.
- other components may be positioned between dirty fluid inlet 12 and cleaning stage 22; for example one or more filter assemblies.
- the surface cleaning apparatus includes at least one cyclonic cleaning stage.
- cleaning stage 22 comprises a cyclonic cleaning stage having a single cyclone chamber 26.
- Chamber 26 comprises a fluid inlet 28, a dirt or separated material outlet 30, and an air outlet 32.
- cleaning stage 22 may be, for example, a multi-cyclone assembly, having a plurality of cyclone chambers in parallel.
- a dirt chamber 34 is positioned below cleaning stage 22. Dirt chamber 34 is in fluid communication with dirt outlet 30, and collects dirt and/or fluid removed from air in cyclone chamber 26.
- dirt chamber 34 is openable such that dirt collected therein may be emptied.
- dirt chamber 34 is slideably removable from cyclone chamber 26.
- dirt chamber 34 may have a bottom that is pivotally openable. It will be appreciated that dirt chamber 34 may be emptied in any manner known in the vacuum cleaner art.
- dirt chamber 34 may be removable with cyclone chamber 22 from the vacuum cleaner.
- an openable door may be provided.
- a divider plate 36 is associated with dirt outlet 30.
- divider plate 36 may comprise a disc 38 with optional support or reinforcing ribs 40 mounted, e.g., to a sidewall of dirt chamber 34 below dirt outlet 30 (see for example Figure 9).
- divider plate 36 may be, for example, mounted above or within dirt outlet 30.
- divider plate may be of any design known in the vacuum cleaner arts. For example, it may be positioned inside a cyclone chamber wherein the dirt collection chamber is the volume positioned below the divider plate and above the bottom of the cyclone chamber.
- the divider plate may be solid or have apertures.
- the divider plate may be mounted to any surface of the dirt chamber or the cyclone chamber.
- filter assembly 42 may comprise a filter 44 housed in a filter housing 46 (see Figure 6). In alternate embodiments, a filter assembly may not be provided, or more than one filter assembly may be provided or more than one filter may be provided in filter housing 44. It will be appreciated that any filter material or materials may be used, such as foam, HEPA and the like.
- cyclonic cleaning stage may be used.
- two cyclonic cleaning stages wherein each stage comprises a single cyclone or two or more cyclones in parallel may be used.
- motor 20 is provided in a motor housing 48.
- Motor housing 48 may a separately molded housing, as shown, or may be, for example, integral with a housing for upright section 18.
- a housing for another component for example surface cleaning head 16 (Fig. 1), may comprise motor housing 48 (i.e. motor 20 may be positioned therein without a separate housing or with a separate housing).
- motor 20 is positioned above filter assembly 42.
- motor 20 may be otherwise positioned.
- motor 20 may be below cyclone chamber 26, or, as previously mentioned, in surface cleaning head 16 (Fig. 1). In other types of surface cleaning apparatus, motor 20 may be at any desired location.
- a sound dampening passage 52 is provided downstream from motor 20. Sound dampening passage 52 serves to reduce the amount of noise that is generated by motor 20 that exits clean air outlet 14 and is perceived by a user. Sound dampening passage 52 is constructed such that, as sound waves pass through the passage, they bounce or reflect between walls of the passage, and are dampened by the walls, thereby reducing the decibel level of the sound produced by the surface cleaning apparatus. Accordingly, at least a portion of passage 52 comprises a first layer of sound reflecting material 54, and an inner layer of sound absorbing material 56. In the embodiments shown, passage 52 is provided downstream of clean air outlet 14.
- clean air outlet comprises a grill 50 on the outer surface of motor housing 48 and provides fluid communication between motor housing outlet 50 and outlet 15 of the sound dampening passage 52.
- passage 52 may be provided within the surface cleaning apparatus, such as within motor housing 48, downstream from motor 20 and upstream from clean air outlet 14.
- the air may travel past motor 20 and then be directed in a passage internal of the surface cleaning apparatus towards a clean air outlet that may be located distal to motor 20.
- more than one passage 52 may be provided.
- a first passage 52a is provided upstream from clean air outlet 14, and a second passage 52b is provided downstream from clean air outlet 14.
- clean air outlet 14 is directly adjacent to passage 52 and may optionally comprise part or all of motor housing 48.
- another member may be provided between motor housing outlet 50 and passage 52.
- a post-motor filter housed in a housing may be provided adjacent or as part of clean air outlet 14, and passage 52 may be downstream from the post motor filter.
- a panel 59 is positioned to overlie clean air outlet 14 and to define a passage between panel 59 and motor housing 48.
- passage 52 is downstream of clean air outlet 14, and comprises a pair of opposed walls 58a, 58b.
- Wall 58a is the inner surface of panel 59 and wall 58b is the outer surface of motor housing 48.
- passage 52 has an outlet 15 that essentially extends around the perimeter of panel 59 since panel 59 is spaced from motor housing 48. Therefore, outlet 15 is located at top end 66 (Fig. 2), bottom end 68 (Fig. 2), and at opposed sides 70, 72 thereof. Accordingly, passage 52 is both laterally extending (in a direction indicated by arrow L1), and longitudinally extending (in a direction indicated by arrow L2 (Fig. 11 B)). It will be appreciated that, in alternate embodiments, panel 59 may abut against part or all or housing 48 except for an outlet 15 that may be sized the same as outlet 14. It will be appreciated that panel 59 may alternately house an airflow conduit therethrough that comprises part or all of passage 52.
- wall 58a is provided as a sound dampening panel 59 which is mounted to motor housing 48 via one or more posts 61 that are received in a mount 61a (see Figure 11 B).
- Sound dampening panel 59 comprises a first outer layer of sound reflecting material 54, and an inner layer of sound absorbing material 56.
- wall 58a further comprises an additional outer support or reinforcing wall 63 adjacent and outwards of sound reflecting material 54.
- support wall 63 is not provided.
- Wall 58b comprises a portion of outer wall 60 of motor housing 50, and a portion of outer wall 65 (Fig. 11A) of filter housing 46 (Fig. 7), and comprises a single layer of sound reflecting material, which is the wall of the housing itself.
- wall 58b may also comprise an inner layer of sound reflecting material. It will be appreciated that any exterior surface of the surface cleaning apparatus may be used as the inner wall 58a.
- sound exemplified by stippled arrows A2
- exits motor housing outlet 50 and enters passage 52.
- Some of the sound will contact sound absorbing material 56 of wall 58a, and be absorbed.
- Some of the sound will pass through sound absorbing material 56, contact sound reflecting material 54 of wall 58a, and be reflected back into passage 52. This portion of the sound will contact wall 58b, and again be reflected back into passage 52, and into sound absorbing material 56 of wall 58a.
- Passage 52 may be of any desired length. Preferably, the length is selected to reduce the sound to a desired decibel level. It will be appreciated that some of the sound may pass through the sound reflecting material 54 (e.g., if it is plastic having standard wall thicknesses used for vacuum cleaners). The sound reflecting material may be honeycombed to assist is further reducing sound transmission through the sound reflecting material.
- the inner wall 58b of the passage 52 is provided with sound absorbing material. It may be the same as the sound absorbing material on panel 59 or different. Preferably the layer of sound absorbing material extends continuously across each of walls 58a, 58b. It will be appreciated that a layer of sound absorbing material may also be provided on the outer surface of panel 59.
- wall 58a is mounted to a panel 59, which is mounted to motor housing 48 via a post 61.
- panel 59 may be removably mounted to motor housing 48. This design is advantageous if outlet 14 has a post motor filter, thereby facilitating the replacement or cleaning of the post motor filter.
- post 61 may be removably slidably received in mount 61a provided in motor housing 48.
- screws, welding, an adhesive or the like may be used to mount panel 59 to the surface cleaning apparatus.
- passage 52 may comprise a longitudinally extending conduit.
- the longitudinally extending conduit may be, for example, cylindrical or rectangular. Accordingly, passage 52 may have an inlet end in flow communication with motor 20 and a distal outlet 15.
- passage 52 may be provided interior of motor housing 48, or exterior of motor housing 48 and internal of the surface cleaning apparatus or exterior of the surface cleaning apparatus.
- the passage 52 may comprise a single cylindrical layer of sound reflecting material, and a single cylindrical layer of sound absorbing material positioned inwardly thereof.
- the passage may comprise a single cylindrical layer of sound reflecting material, and a single layer of sound absorbing material extending along only half of the conduit, for example in a half-pipe shape.
- the sound waves will reflect back and forth across the diameter of passage 52, and will be absorbed as they pass through passage 52. Accordingly, all walls of passage 52 may be lined with the sound absorbing material or only part of the walls may be so lined. For example, if the transverse cross section of passage 52 is square, there will be a pair of opposed walls, each of which may be so lined. If only part is so lined, it is preferred that the part that is lined is positioned on the outward side of the passage 52. For example, a portion of the passage 52 that faces in toward the appliance (e.g., wall 58b that has motor 20 on the other side thereof) need not be so lined.
- passage 52 is configured such that it extends at an angle to a direction of flow of the air upstream of the passage.
- the air travels horizontally, e.g., if the upright section of the vacuum cleaner is oriented vertically as exemplified, as it exits outlet 14 and is then directed to by panel 59 to travel downwardly, upwardly or laterally.
- the air will undergo a change of direction of about 90° as it enters passage 52.
- the change in direction is greater than 15°, more preferably greater than 30°, and most preferably greater than 45°.
- the change of direction may be 90° plus or minus 45°.
- the air will change direction at an angle greater then the change of direction of the sound, thereby causing the sound to be directed towards walls 58a, 58b.
- passage may also cause the air to undergo such changes of direction as it travels through passage 52.
- passage 52 curves around a portion of the outer surface of the upright section of the vacuum cleaner and also defining a curved path extending horizontally, and extends vertically along axis 62 (Fig. 11A).
- Air entering passage 52 generally flows along an axis 64.
- axis 62 (Fig. 11A) and axis 64 are approximately perpendicular.
- axis 62 (Fig. 11A) and axis 64 may be otherwise angled.
- axis 62 (Fig. 11A) and axis 64 preferably are at an angle of 15° or greater relative to each other.
- passage 52 may be a linearly extending conduit having continuous sidewalls.
- the sound dampening passage has a cross sectional area transverse to its longitudinal extent that decreases in a downstream direction (see for example, Figure 14). In alternate embodiments, the sound dampening passage may have a cross sectional area transverse to its longitudinal extent that increases in a downstream direction (see for example, Figure 13). In alternate embodiments, the sound dampening passage may have a cross sectional area transverse to its longitudinal extent that is constant in a downstream direction (see for example,
- more than one sound dampening passage may be associated with motor 20.
- an additional passage 52a is provided interior to housing 48.
- the additional passage 52a is provided by walls 76, which include an outer layer of sound reflecting material 54 and an inner layer of sound absorbing material 56. Walls 76 extend longitudinally and partially surround motor 20. Accordingly, the sound generated by motor 20 will be partially dampened in passage 52a prior to entering passage 52b. Walls 76 may be part or all of a motor shield or housing within an outer housing of the vacuum cleaner.
- the sound reflecting material may be selected from a variety of materials.
- the sound reflecting material may be a plastic, such as ABS (acrylonitrile butadiene styrene), polycarbonate, or polyproplyene. Any hard plastic may be used.
- the sound reflecting material may be a metal, such as aluminum or steel.
- more than one reflecting material may be selected.
- the sound reflecting portion of wall 58a may be a metal
- the sound reflecting portion of wall 58b may be a plastic.
- the sound absorbing material 56 may be selected from a variety of materials.
- the sound absorbing material 56 may be a foam, a rubber, or a silicone.
- the sound reflecting material may comprise pockets filled with a gas or a fluid.
- the sound reflecting material may be a bubble-wrap like material.
- a soft material is used.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002675717A CA2675717A1 (en) | 2006-12-12 | 2007-12-11 | Sound dampening passage and surface cleaning apparatus with same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86958606P | 2006-12-12 | 2006-12-12 | |
US60/869,586 | 2006-12-12 |
Publications (1)
Publication Number | Publication Date |
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WO2008070971A1 true WO2008070971A1 (en) | 2008-06-19 |
Family
ID=39511188
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2007/002213 WO2008070971A1 (en) | 2006-12-12 | 2007-12-11 | Sound dampening passage and surface cleaning apparatus with same |
PCT/CA2007/002208 WO2008070966A1 (en) | 2006-12-12 | 2007-12-11 | Convertible surface cleaning apparatus |
PCT/CA2007/002228 WO2008070980A1 (en) | 2006-12-12 | 2007-12-12 | Upright vacuum cleaner |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2007/002208 WO2008070966A1 (en) | 2006-12-12 | 2007-12-11 | Convertible surface cleaning apparatus |
PCT/CA2007/002228 WO2008070980A1 (en) | 2006-12-12 | 2007-12-12 | Upright vacuum cleaner |
Country Status (9)
Country | Link |
---|---|
US (9) | US8127398B2 (en) |
EP (2) | EP2117400A4 (en) |
JP (2) | JP2010512195A (en) |
KR (1) | KR20090106515A (en) |
CN (6) | CN101657133A (en) |
AU (2) | AU2007332117A1 (en) |
CA (3) | CA2677526C (en) |
GB (2) | GB2457420B (en) |
WO (3) | WO2008070971A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9492045B2 (en) | 2012-03-09 | 2016-11-15 | Omachron Intellectual Property Inc. | Filter assembly for a surface cleaning apparatus |
US10506904B2 (en) | 2017-07-06 | 2019-12-17 | Omachron Intellectual Property Inc. | Handheld surface cleaning apparatus |
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