CA2623482A1 - Quiet vacuum cleaner - Google Patents
Quiet vacuum cleaner Download PDFInfo
- Publication number
- CA2623482A1 CA2623482A1 CA002623482A CA2623482A CA2623482A1 CA 2623482 A1 CA2623482 A1 CA 2623482A1 CA 002623482 A CA002623482 A CA 002623482A CA 2623482 A CA2623482 A CA 2623482A CA 2623482 A1 CA2623482 A1 CA 2623482A1
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- CA
- Canada
- Prior art keywords
- vacuum cleaner
- quiet
- assembly
- exhaust
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891 communication Methods 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims description 16
- 239000006261 foam material Substances 0.000 claims description 14
- 229920000515 polycarbonate Polymers 0.000 claims description 9
- 239000004417 polycarbonate Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000003063 flame retardant Substances 0.000 claims description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000010407 vacuum cleaning Methods 0.000 description 3
- 241000274177 Juniperus sabina Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000001654 beetroot red Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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
- A47L5/36—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
- 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
- A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Suction Cleaners (AREA)
- Filters For Electric Vacuum Cleaners (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Jellies, Jams, And Syrups (AREA)
- Manipulator (AREA)
Abstract
A light-weight, quiet vacuum cleaner assembly for a backpack vacuum cleaner includes an air inlet for communicating with a vacuum cleaner hose and a filter; a vacuum motor for drawing air through the vacuum cleaner hose, air inlet, and filter; a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, and wherein the vacuum cleaner assembly weighs 2-12 lbs. and includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 0.6.
Description
QUIET VACUUM CLEANER
Background Field of the Invention [01] The present invention relates, in general, to vacuum cleaners, and, in particular, to baclcpack vacuum cleaners.
Background of the Invention [02] It is well-known that vacuum cleaning efficiency has been improved through the use of baclcpack vacuum cleaners. A backpack vacuum cleaner includes a backpack assembly, similar to that used in a hiking backpack, where the vacuum cleaner assembly is carried by a backpack frame of the backpack assembly. A vacuum cleaner hose extends from a top of the vacumn cleaner assembly and is connected to a vacuum cleaner wand. A
distal end of the vacuum cleaner wand includes a vacuum cleaner floor tool. In use, the cleaner carries the backpack vacuum cleaner on his or her back using the baclcpack assembly, and directs the vacuum cleaner tool for cleaning the floor surface through the wand. Historically, much of the cleaning performed using backpack vacuum cleaners such as that done in office buildings or other comunercial settings was done at night time, by night-time cleaning personnel and janitors. Noise made by the backpack vacuum cleaners was not that big of an issue because most workers and visitors were not present during the vacuum cleaning, so the noise would not bother workers in the office buildings or other commercial settings. However, more recently, there is a trend to clean during the daytime, when workers and visitors in the office buildings or other commercial settings are present. One of the complaints by workers and visitors in the office buildings or other commercial settings of vacuum cleaning is the noise. The noise sources are noises associated with the motor and air movement noise at the vacuum tools and exhaust.
Background Field of the Invention [01] The present invention relates, in general, to vacuum cleaners, and, in particular, to baclcpack vacuum cleaners.
Background of the Invention [02] It is well-known that vacuum cleaning efficiency has been improved through the use of baclcpack vacuum cleaners. A backpack vacuum cleaner includes a backpack assembly, similar to that used in a hiking backpack, where the vacuum cleaner assembly is carried by a backpack frame of the backpack assembly. A vacuum cleaner hose extends from a top of the vacumn cleaner assembly and is connected to a vacuum cleaner wand. A
distal end of the vacuum cleaner wand includes a vacuum cleaner floor tool. In use, the cleaner carries the backpack vacuum cleaner on his or her back using the baclcpack assembly, and directs the vacuum cleaner tool for cleaning the floor surface through the wand. Historically, much of the cleaning performed using backpack vacuum cleaners such as that done in office buildings or other comunercial settings was done at night time, by night-time cleaning personnel and janitors. Noise made by the backpack vacuum cleaners was not that big of an issue because most workers and visitors were not present during the vacuum cleaning, so the noise would not bother workers in the office buildings or other commercial settings. However, more recently, there is a trend to clean during the daytime, when workers and visitors in the office buildings or other commercial settings are present. One of the complaints by workers and visitors in the office buildings or other commercial settings of vacuum cleaning is the noise. The noise sources are noises associated with the motor and air movement noise at the vacuum tools and exhaust.
[03] Motor noise has been addressed in the past by placing sound absorbing materials in the flow path. This reduces the system performance to an unacceptable level and adds weight to the vacuum cleaner. By restricting the flow path in this manner the motor is susceptible to overheating because it is not getting sufficient air for cooling.
[04] Therefore, a need exists for a vacuum cleaner, especially a backpaclc vacuum cleaner, that overcomes the problems with prior art vacuum cleaners, especially the problems with prior art backpack vacuum cleaners.
Summary [05] The baclcpack vacuum cleaner of the present invention is light-weight and significantly reduces the noise levels associated with the motor and air movement noise at the vacuum tools and exhaust while maintaining good system performance. The vacuum cleaner maintains large cross-sectional areas for exhaust flow, allowing sufficient air flow to provide the required cooling for the motor. The vacuum cleaner also directs the air flow to unique foam surfaces to obtain the required sound deadening.
Summary [05] The baclcpack vacuum cleaner of the present invention is light-weight and significantly reduces the noise levels associated with the motor and air movement noise at the vacuum tools and exhaust while maintaining good system performance. The vacuum cleaner maintains large cross-sectional areas for exhaust flow, allowing sufficient air flow to provide the required cooling for the motor. The vacuum cleaner also directs the air flow to unique foam surfaces to obtain the required sound deadening.
[06] An aspect of the invention involves a light-weight, quiet vacuum cleaner assembly for a backpack vacuum cleaner including a backpack assembly for carrying the vacuum cleaner assembly on a user's back, a vacuum cleaner hose for vacuuming debris from a surface, and a filter for filtering out vacuumed debris. The light-weight, quiet vacuum cleaner assembly includes an air inlet for communicating with the vacuum cleaner hose and the filter; a vacuum motor for drawing air througli the vacuum cleaner hose, air inlet, and filter; a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, and wherein the vacuum cleaner assembly weighs 2-12 lbs. and includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 0.6.
[07] Another aspect of the invention involves a light-weight, quiet vacuum cleaner assembly for a baclcpack vacuuin cleaner including a backpack assembly for carrying the vacuum cleaner assembly on a user's back, a vacuum cleaner hose for vacuuming debris from a surface, and a filter for filtering out vacuumed debris. The light-weight, quiet vacuum cleaner asseinbly includes an air inlet for communicating witli the vacuum cleaner hose and the filter; a vacuum motor for drawing air through the vacuum cleaner liose, air inlet, and filter; a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, and wherein the vacuum cleaner assembly weighs 2-12 lbs. and includes a suction (in. (H20)) to noise (dbA) ratio (suction/noise) of at least 0.6.
[08] Another aspect of the invention involves a light-weight, quiet vacuum cleaner assembly for a backpaclc vacuum cleaner including a backpack assembly for carrying the vacuum cleaner assembly on a user's back, a vacuum cleaner hose for vacuuming debris from a surface, and a filter for filtering out vacuumed debris. The light-weight, quiet vacuum cleaner assembly includes an air inlet for communicating with the vacuum cleaner hose and the filter, the air inlet including an intalce area; a vacuum motor for drawing air through the vacuum cleaner hose, air inlet, and filter; a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, and wherein the quiet exhaust assembly module includes a stage of exhaust openings having a total area and the ratio of the total area of the stage of exhaust openings to the intalce area of the air inlet is at least 3:1.
Brief Description of the Drawings [09] The details of the present invention, both as to its structure and operation, may be gleaned in part by the accompanying drawings, in which like reference numerals refer to like parts, and in which:
Brief Description of the Drawings [09] The details of the present invention, both as to its structure and operation, may be gleaned in part by the accompanying drawings, in which like reference numerals refer to like parts, and in which:
[10] FIG. 1 is a perspective view of an embodiment of a quiet backpack vacuum cleaner with a vacuum cleaner hose, vacuum cleaner wand, and vacuum cleaner floor tool attached and the quiet backpack vacuum cleaner shown in use on the back of a user;
[11] FIG. 2 is perspective view of the backpack vacuum cleaner of FIG. 1;
[12] FIG. 3 is front elevational view of the backpack vacuum cleaner of FIG. 1 with the back strap system, power cord assembly, two-speed switch asseinbly, and paper filter bag hidden for clarity;
[13] FIG. 4 is a front elevational view of a quiet exhaust assembly of the backpack vacuum cleaner witli the rest of the backpack vacuum cleaner shown in phantom;
[14] FIG. 5 is an enlarged front elevational view of the quiet exhaust assembly module of FIG. 4 with the exhaust air flow path shown; and [15] FIG. 6 is an exploded perspective view of the quiet exhaust assembly module of FIGS. 4 and 5.
Detailed Description [16] With reference to FIGS. 1-6, and initially FIGS. 1-3, an embodiment of a quiet backpack vacuum cleaner 100 will be described.
Detailed Description [16] With reference to FIGS. 1-6, and initially FIGS. 1-3, an embodiment of a quiet backpack vacuum cleaner 100 will be described.
[17] Although the quiet vacuum cleaner 100 is shown and described as a backpack vacuum cleaner, the features of the vacuum cleaner 100 that make it a quiet, high-performance vacuum cleaner may be applied to additional types of vacuum cleaners such as, but not by way of limitation, canister vacuum cleaners and upright vacuum cleaners.
[18] After reading this description it will become apparent to one skilled in the art how to implement the invention in various alternative embodiments and alternative applications. However, although various embodiments of the present invention will be described herein, it is understood that these embodiments are presented by way of example only, and not limitation. As such, this detailed description of various alternative embodiments should not be construed to limit the scope or breadth of the present invention as set forth in the appended claims.
[19] With reference to FIG. 1, the quiet backpack vacuum cleaner 100 includes a vacuum cleaner assembly 110 that is carried on a user's back via a backpack assembly 120. A vacuum cleaner hose 130 extends from a top of the vacuum cleaner assembly 110 and is connected to a vacuum cleaner wand 140. A distal end of the vacuum cleaner wand 140 includes a vacuum cleaner floor tool 150, wliich engages the carpet or otlzer floor surface for cleaning the same.
[20] Witll reference additionally to FIG. 2, the backpack assembly 120 includes a baclcpack strap system 160 connected to a vacuum cleaner support 170, which carries the vacuuin cleaner assembly 110. The backpack strap system 160 includes slioulder straps 180 and a waist belt 190.
[21] The vacumn cleaner assembly 110 includes a main housing assembly 200, a top cap hose and air inlet 210 at a top end, and an opposite exhaust end 220. A
two-speed switch assembly witll switch box 230 and a power cord assembly 240 are connected to a lower electrical section 260 (FIG. 3) of the vacuum cleaner assembly 110 througll respective cords.
two-speed switch assembly witll switch box 230 and a power cord assembly 240 are connected to a lower electrical section 260 (FIG. 3) of the vacuum cleaner assembly 110 througll respective cords.
[22] With reference additionally to FIG. 3, the vacuum cleaner assembly 110 includes an upper filter section 250 and a lower electrical section 260. The upper filter section 250 includes an intalce filter and refuse bag 265, and a motor intake filter 280.
A lower portion of the upper filter section 250 and the lower electrical section 260 carry a quiet exhaust assembly module 270.
A lower portion of the upper filter section 250 and the lower electrical section 260 carry a quiet exhaust assembly module 270.
[23] With reference to FIGS. 4-6, an embodiment of the quiet exlzaust assembly module 270 will be described in more detail. The quiet exhaust assembly module 270 includes a vacuum motor 290, an annular gasket 300, a motor housing 310, a quiet module housing 320, acoustic panel 330, an annular director plate 340, an annular foam air diffuser 350, an annular acoustic panel 360, and a quiet module cap 370. Each of these quiet exhaust assembly module components will now be described in turn below.
[24] The vacuum motor 290 is a two-stage vacuuin motor having a cylindrical head with an underside.
[25] The annular gasket 300 is a neoprene gasket with an adhesive on one side.
The annular gasket 300 is disposed between the underside of the cylindrical head of the vacuum motor 290 and an upper surface of the motor housing 310.
[261 Threaded fasteners 380 are used to attach the vacuum motor 290 to the motor housing 310.
[27] The motor housing 310 has a generally cylindrical wall 3 82 with Stage 1 elongated lateral slots 384 near a bottom of the motor housing 310. In the embodiment shown, the motor housing 310 includes four (4) Stage 1 slots 384 with three (3) of the slots having a dimension of 3.25 in. X 0.5 in. (3 Slots @ 3.25" X 0.5"= 4.875 sq. in.), and the last slot having a dimension of 2.25 in. X 1.0 in. (1 Slot @ 2.25" X 1.0" = 2.25 sq.
in.). Stage 1 air flow occurs through these slots 384. The total area of the Stage 1 slots 384 is 4.875 sq.
in. + 2.25 sq. in.= 7.125 sq. in. The bottom of the motor housing 310 includes a plurality of ribs 386 extending outwardly from the wall 382. The ribs 386 include threaded bosses.
[28] Threaded fasteners 390 threadably engage the threaded bosses of the ribs 386 to attach the quiet module housing 320 to the motor housing 310.
[29] The quiet module housing 320 includes a top surface 392 with star-shaped, radiating ridges extending therefrom. The top surface 392 of the quiet module 1lousing 320 forins the bottom or floor of the motor housing 310 when the quiet module housing 320 is connected to the motor housing 310. The quiet module housing 320 has a frustoconical wall 394 with Stage 2 elongated lateral slots 396 near a top of the quiet module housing 320. In the embodiment shown, the quiet module housing 320 includes four (4) Stage 2 slots 396 having a dimension of 3.00 in. X 0.5 in. (4 Slots @
3.00" X
0.5"= 6.0 sq. in.). Stage 2 air flow occurs through these slots 396. As indicated above, the total area of the Stage 2 slots 396 is 6.0 sq. in.
[30] The acoustic panel 330 includes two half-cylindrical members with an outer surface 398. The acoustic panel 330 is made of a unique, light-weiglit, high-temperature, fire-retardant foam material. The foam material is produced in flat sheets. An adhesive is added to a side of a flat 0.032 in. polycarbonate sheet, and the polycarbonate sheet is laminated to a side of the flat sheet of foam material. Two flat sheets of foam material and polycarbonate are bent into the half-cylinder configuration shown, with the polycarbonate sheet on the outer side of the acoustic panel 330. The two half-cylindrical members are placed together to form a cylinder around the quiet exhaust asseinbly module 270, as shown in FIG. 5. The hoop stress in the polycarbonate sheet and acoustic panel 330 cause the acoustic panel 330 to be held in place over the motor housing 310, quiet module housing 320, annular director plate 340, annular foam air diffuser 350, annular acoustic panel 360, and quiet module cap 370 without any adhesive. The unique, light-weight, high-temperature, fire-retardant foam material of the acoustic panel 330 provides maximum attenuation of the sound waves in the quiet exhaust assembly module 270. The foam material used in the acoustic panels 330 is a high-performance polyimide foam sold as type HT-340 under the naine Solimide by INSPEC FOAMS, INC. of Plano, Texas.
For mechanical properties, the foam material has a density (ASTM D 3574, Test A) of 0.4 lb/ft3, and a tensile strength (ASTM D 3574, Test E) of 7 lb/inz. For thermal properties, the foam material has a therinal conductivity (ASTM C 518 at mean temperature of 75 F) of 0.32 (BTU=in)/(hr=ft3- F), and a continuous use temperature (recommended maximum) of 575 F. For flammability properties, the foam material has a radiant panel flame spread index (ASTM E 162) of 1, a non-flaming specific optical density (ASTM E 662) of smoke of 1, a flaming specific optical density of smoke (ASTM E 662) of 3, a flame spread index (ASTM E 84-95, Tested at a tliicluiess of 22 mm (0.9 in.)) of 0, a smoke developed index (ASTM E 84-95, Tested at a thiclcness of 22 mm (0.9 in.)) of 10. For steam autoclave aging properties (ASTM D 3574, Test J, Procedure J, and Test E), the foain material has a tensile strength retained of greater than 85% and a change in weight and dimensions of less than 3%. For acoustic properties, the foam material has the following acoustical absorption coefficients (sabins/ft2; ASTM C 423 and E 795, Type A Mounting) at 1 in.:
0.08 at 125 Hz, 0.22 at 250 Hz, 0.58 at 500 Hz, 0.93 at 1000 Hz, 0.94 at 2000 Hz, 0.81 at 4000 Hz. The foam material has the following acoustical absorption coefficients (sabins/ftZ; ASTM C 423 and E 795, Type A Mounting) at 2 in.: 0.34 at 125 Hz, 0.52 at 250 Hz, 0.86 at 500 Hz, 1.06 at 1000 Hz, 0.85 at 2000 Hz, 0.94 at 4000 Hz.
[31] The annular director plate 340 is a thin, annular sheet of polycarbonate material that serves as a barrier and directs air flow towards the center of the quiet exhaust assembly module 270.
[32] The annular foam air diffuser 350 serves to break up some line of sight in the quiet exhaust asseinbly module 270 and attenuate the air flow sound waves. The annular foam air diffuser 350 is made of a reticulated flexible polyester urethane foam that has a completely open cell, three-dimensional structure of skeletal strands which give them special filtering properties. The foam material used in the diffuser 350 is sold as 20 PPI, SIF Z under the name FOAMEX by Foamex Technical Products of Eddystone, Pennsylvania. The homogeneous structure of the diffuser 350 helps minimize the possibility of open channels which could drastically affect filter efficiency.
Each cell in the mediuin is completely interconnected with all surrounding cells. This allows for free passage of air and at the same time provides high surface-area contact for impingement of dust particles. The resilience and strengtll of the diffuser 350 helps prevent and strand displacement under normal operating conditions. In the embodiment shown, the diffuser 350 includes a 20 pore size (average number of pores-per-linear-inch). At this porosity, the diffuser 350 includes a density of 1.9 lb/ft3, a tensile strength of 25 psi, an ultimate elongation of 320%, a tear strength of 5.5 lb/in., a 50% compression set of 7, a 25%
compression deflection of 0.42 psi, and a 65% compression deflection of 0.67 psi. The diffuser 350 has excellent high-temperature characteristics. It can withstand intermittent temperatures as high as 225 F. At temperatures above 500 F, the material beings to melt with decoinposition and vaporization.
[33] The annular acoustic panel 360 is made of the same material as the acoustic panel 330 described. The above description of the material used in the acoustic panel 330 is incorporated by reference here as though set forth in full.
[34] The quiet module cap 370 includes a circular dish-like configuration with an annular recess that receives the acoustic panel 360. A central boss 399 receives threaded fastener 400 to mount the quiet module cap 370 and hold the intermittent coinponents of the quiet module housing 320 together. The quiet module cap 370 is made of a polycarbonate material and includes eight (8) Stage 3 slots 402 having a dimension of 2.0 in. X 0.36 in. (8 Slots @ 2.00" X 0.36 in = 5.76 sq. in.). Stage 3 air flow occurs through these slots 402. As indicated above, the total area of the Stage 3 slots 402 is 5.76 sq. in.
The quiet module cap 370 and threaded fastener 400 allow the quiet exhaust assembly module 270 to be easily field serviced. To service the quiet exhaust assembly module 270, a user simply unscrews the threaded fastener 400, and removes the quiet module cap 370.
This provides easy access to the components of the quiet exhaust assembly module 270 for repair or replacement of the components. The entire quiet exllaust assembly module 270 can also be easily replaced in this manner. As a result, the backpack vacuum cleaner 100 is never down because of something in the quiet exhaust assembly module 270 of the backpack vacuum cleaner 100.
[35] A motor control module 410 is electrically coupled to the vacuum motor 290, two-speed switch assembly with switch box 230, and power cord assembly 240. The motor control module 410 provides two-speed control of the vacuum motor 290. The motor control module 410 also includes a tliermal protection device for shutting off the vacuuln motor 290 when the temperature exceeds approximately 95 C.
[36] The baclcpack vacuum cleaner 100 will now be described in use. When the user is in the area desired for vacuuming, the user dons the backpack vacuum cleaner 100 using the baclcpack strap system 160 in the same manner as putting on a backpack for hilcing.
This is easily performed because the baclcpack vacuum cleaner 100 is light-weight (2-12 lbs.). In the einbodiment shown, the vacuuin cleaner assembly 110 weighs 11 lbs., 3 oz.
The user's arms are placed through the shoulder straps 180 and the shoulder straps 180 are tightened to a snug, yet comfortable condition on the user's shoulders. The waist belt 190 is clipped together, and tightened to a snug, yet comfortable condition around the user's waist. Prior to or after doiming the backpack vacuum cleaner 100, the plug of the power cord assembly 240 is plugged into an electrical outlet. In an embodiment of the baclcpack vacuum cleaner 100 where the backpack vacuuin cleaner 100 has an onboard power source (e.g., one or more batteries, fuel cells), plugging the power cord assembly 240 into an electrical outlet to power the bacicpack vacuum cleaner 100 may not be necessary. The backpack vacuum cleaner 100 is switched on using the two-speed switch assembly 230.
The two-speed switch assembly 230 is also used to control the speed of the vacuum motor 290 between a high setting and low setting. In alternative embodiments, the baclkpack vacuuin cleaner 100 may have a nuinber of settings other than two settings (e.g., 1, 3, 4, etc.).
[37] In the embodiment shown, the backpack vacuum cleaner 100 performs @ about CFM with about 70 in. (H20) of lift @ about 65 dbA on a high-speed motor setting, and about 40 CFM with about 40 in. (H20) of lift @ about 61 dbA on a low-speed motor setting. In a preferred embodiment, the backpack vacuum cleaner 100 includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 0.6 and a suction (in. (H20)) to noise (dbA) ratio (suction/noise) of at least 0.6. In a more preferred embodiment, the baclcpaclc vacuum cleaner 100 includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 1.0 and a suction (in. (H20)) to noise (dbA) ratio (suction/noise) of at least 1Ø
[38] Witli the vacuum motor 290 activated, air, dirt, and debris are drawn through the vacuum cleaner floor tool 150, vacuum cleaner wand 140, vacuum cleaner hose 130, and air inlet 210 into the intake filter/refuse bag 265 (FIG. 3). The dirt and debris is collected by the intake filter/refuse bag 265 and air is drawn through the motor intake filter 280 and the vacuum motor 290. Exhaust air is expelled out of the bottom of the vacuum motor 290, and into the motor housing 310. The exhaust air reflects off of and is directed radially outward along the star-shaped, radiating ridges on the top surface 392. The exhaust air exits the motor housing 310 tllrough the Stage 1 slots 396. The exhaust air reflects off of the acoustic pane1330, dampening the sound level, around the bottom of the motor housing 310 and top of the quiet module housing 320, and into/through the Stage 2 slots 396 of the quiet module housing 320. The air then flows downward towards the director plate 340, and the director plate 340 directs the air flow radially inward and down towards the acoustic panel 360. Air flow reflects off of the acoustic panel 360, further dampening the sound level, and outward through the air diffuser foam 350. The air diffuser foam 350 filters out exhaust particulates in the exhaust air flow and further dampens the sound levels without significantly impeding air flow. The exhaust air impinges the acoustic panel 410 as it exits the air diffuser foam. The exhaust air then flows downward, tllrough the stage 3 slots 402, and out of the quiet exhaust assembly module 270.
[39] With reference to FIGS. 2, 5, and 6, the air inlet 210 has a 1.5 in.
intalce diaineter and an intake area of 1.77 sq. in. As indicated above, the total bypass area for the Stage 1 slots 384 is 7.125 sq. in., the total bypass area for the Stage 2 slots 396 is 6.0 sq. in., and the total bypass area for the Stage 3 slots 402 is 5.76 sq. in. The inventors have determined that it is desirable for the bypass areas in each stage of the quiet exhaust assembly module 270 to be at least 3 times that of the area of the air inlet 210. This reduces friction and, thus, minimizes flow loss.
[40] The exhaust assembly module 270 incorporates the principles of "Line of Sight"
and non-reflective surfaces to diminish sound levels (db). In the quiet exhaust assembly module 270, the vacuuin motor 290 is encapsulated in a housing, and air flow is directed to high-teinperature acoustic foam covered surfaces and through a condensed labyrinth of passages.
[41] The above features minimize the weight of the backpack vacuum cleaner 100, maximize dissipation of sound levels in the backpack vacuuin cleaner 100, and maximize air flow in the backpack vacuum cleaner 100.
[42] The above description of the disclosed embodiments is provided to enable any person slcilled in the art to malce or use the invention. Various modifications to these embodiments will be readily apparent to those slcilled in the art, and the generic principles described herein can be applied to other embodiments without departing fiom the spirit or scope of the invention. Thus, it is to be understood that the description and drawings presented herein represent a presently preferred embodiment of the invention and are therefore representative of the subject matter which is broadly contemplated by the present invention. It is further understood that the scope of the present invention fully encompasses other embodiments that may become obvious to those skilled in the art and that the scope of the present invention is accordingly limited by nothing other than the appended claims.
The annular gasket 300 is disposed between the underside of the cylindrical head of the vacuum motor 290 and an upper surface of the motor housing 310.
[261 Threaded fasteners 380 are used to attach the vacuum motor 290 to the motor housing 310.
[27] The motor housing 310 has a generally cylindrical wall 3 82 with Stage 1 elongated lateral slots 384 near a bottom of the motor housing 310. In the embodiment shown, the motor housing 310 includes four (4) Stage 1 slots 384 with three (3) of the slots having a dimension of 3.25 in. X 0.5 in. (3 Slots @ 3.25" X 0.5"= 4.875 sq. in.), and the last slot having a dimension of 2.25 in. X 1.0 in. (1 Slot @ 2.25" X 1.0" = 2.25 sq.
in.). Stage 1 air flow occurs through these slots 384. The total area of the Stage 1 slots 384 is 4.875 sq.
in. + 2.25 sq. in.= 7.125 sq. in. The bottom of the motor housing 310 includes a plurality of ribs 386 extending outwardly from the wall 382. The ribs 386 include threaded bosses.
[28] Threaded fasteners 390 threadably engage the threaded bosses of the ribs 386 to attach the quiet module housing 320 to the motor housing 310.
[29] The quiet module housing 320 includes a top surface 392 with star-shaped, radiating ridges extending therefrom. The top surface 392 of the quiet module 1lousing 320 forins the bottom or floor of the motor housing 310 when the quiet module housing 320 is connected to the motor housing 310. The quiet module housing 320 has a frustoconical wall 394 with Stage 2 elongated lateral slots 396 near a top of the quiet module housing 320. In the embodiment shown, the quiet module housing 320 includes four (4) Stage 2 slots 396 having a dimension of 3.00 in. X 0.5 in. (4 Slots @
3.00" X
0.5"= 6.0 sq. in.). Stage 2 air flow occurs through these slots 396. As indicated above, the total area of the Stage 2 slots 396 is 6.0 sq. in.
[30] The acoustic panel 330 includes two half-cylindrical members with an outer surface 398. The acoustic panel 330 is made of a unique, light-weiglit, high-temperature, fire-retardant foam material. The foam material is produced in flat sheets. An adhesive is added to a side of a flat 0.032 in. polycarbonate sheet, and the polycarbonate sheet is laminated to a side of the flat sheet of foam material. Two flat sheets of foam material and polycarbonate are bent into the half-cylinder configuration shown, with the polycarbonate sheet on the outer side of the acoustic panel 330. The two half-cylindrical members are placed together to form a cylinder around the quiet exhaust asseinbly module 270, as shown in FIG. 5. The hoop stress in the polycarbonate sheet and acoustic panel 330 cause the acoustic panel 330 to be held in place over the motor housing 310, quiet module housing 320, annular director plate 340, annular foam air diffuser 350, annular acoustic panel 360, and quiet module cap 370 without any adhesive. The unique, light-weight, high-temperature, fire-retardant foam material of the acoustic panel 330 provides maximum attenuation of the sound waves in the quiet exhaust assembly module 270. The foam material used in the acoustic panels 330 is a high-performance polyimide foam sold as type HT-340 under the naine Solimide by INSPEC FOAMS, INC. of Plano, Texas.
For mechanical properties, the foam material has a density (ASTM D 3574, Test A) of 0.4 lb/ft3, and a tensile strength (ASTM D 3574, Test E) of 7 lb/inz. For thermal properties, the foam material has a therinal conductivity (ASTM C 518 at mean temperature of 75 F) of 0.32 (BTU=in)/(hr=ft3- F), and a continuous use temperature (recommended maximum) of 575 F. For flammability properties, the foam material has a radiant panel flame spread index (ASTM E 162) of 1, a non-flaming specific optical density (ASTM E 662) of smoke of 1, a flaming specific optical density of smoke (ASTM E 662) of 3, a flame spread index (ASTM E 84-95, Tested at a tliicluiess of 22 mm (0.9 in.)) of 0, a smoke developed index (ASTM E 84-95, Tested at a thiclcness of 22 mm (0.9 in.)) of 10. For steam autoclave aging properties (ASTM D 3574, Test J, Procedure J, and Test E), the foain material has a tensile strength retained of greater than 85% and a change in weight and dimensions of less than 3%. For acoustic properties, the foam material has the following acoustical absorption coefficients (sabins/ft2; ASTM C 423 and E 795, Type A Mounting) at 1 in.:
0.08 at 125 Hz, 0.22 at 250 Hz, 0.58 at 500 Hz, 0.93 at 1000 Hz, 0.94 at 2000 Hz, 0.81 at 4000 Hz. The foam material has the following acoustical absorption coefficients (sabins/ftZ; ASTM C 423 and E 795, Type A Mounting) at 2 in.: 0.34 at 125 Hz, 0.52 at 250 Hz, 0.86 at 500 Hz, 1.06 at 1000 Hz, 0.85 at 2000 Hz, 0.94 at 4000 Hz.
[31] The annular director plate 340 is a thin, annular sheet of polycarbonate material that serves as a barrier and directs air flow towards the center of the quiet exhaust assembly module 270.
[32] The annular foam air diffuser 350 serves to break up some line of sight in the quiet exhaust asseinbly module 270 and attenuate the air flow sound waves. The annular foam air diffuser 350 is made of a reticulated flexible polyester urethane foam that has a completely open cell, three-dimensional structure of skeletal strands which give them special filtering properties. The foam material used in the diffuser 350 is sold as 20 PPI, SIF Z under the name FOAMEX by Foamex Technical Products of Eddystone, Pennsylvania. The homogeneous structure of the diffuser 350 helps minimize the possibility of open channels which could drastically affect filter efficiency.
Each cell in the mediuin is completely interconnected with all surrounding cells. This allows for free passage of air and at the same time provides high surface-area contact for impingement of dust particles. The resilience and strengtll of the diffuser 350 helps prevent and strand displacement under normal operating conditions. In the embodiment shown, the diffuser 350 includes a 20 pore size (average number of pores-per-linear-inch). At this porosity, the diffuser 350 includes a density of 1.9 lb/ft3, a tensile strength of 25 psi, an ultimate elongation of 320%, a tear strength of 5.5 lb/in., a 50% compression set of 7, a 25%
compression deflection of 0.42 psi, and a 65% compression deflection of 0.67 psi. The diffuser 350 has excellent high-temperature characteristics. It can withstand intermittent temperatures as high as 225 F. At temperatures above 500 F, the material beings to melt with decoinposition and vaporization.
[33] The annular acoustic panel 360 is made of the same material as the acoustic panel 330 described. The above description of the material used in the acoustic panel 330 is incorporated by reference here as though set forth in full.
[34] The quiet module cap 370 includes a circular dish-like configuration with an annular recess that receives the acoustic panel 360. A central boss 399 receives threaded fastener 400 to mount the quiet module cap 370 and hold the intermittent coinponents of the quiet module housing 320 together. The quiet module cap 370 is made of a polycarbonate material and includes eight (8) Stage 3 slots 402 having a dimension of 2.0 in. X 0.36 in. (8 Slots @ 2.00" X 0.36 in = 5.76 sq. in.). Stage 3 air flow occurs through these slots 402. As indicated above, the total area of the Stage 3 slots 402 is 5.76 sq. in.
The quiet module cap 370 and threaded fastener 400 allow the quiet exhaust assembly module 270 to be easily field serviced. To service the quiet exhaust assembly module 270, a user simply unscrews the threaded fastener 400, and removes the quiet module cap 370.
This provides easy access to the components of the quiet exhaust assembly module 270 for repair or replacement of the components. The entire quiet exllaust assembly module 270 can also be easily replaced in this manner. As a result, the backpack vacuum cleaner 100 is never down because of something in the quiet exhaust assembly module 270 of the backpack vacuum cleaner 100.
[35] A motor control module 410 is electrically coupled to the vacuum motor 290, two-speed switch assembly with switch box 230, and power cord assembly 240. The motor control module 410 provides two-speed control of the vacuum motor 290. The motor control module 410 also includes a tliermal protection device for shutting off the vacuuln motor 290 when the temperature exceeds approximately 95 C.
[36] The baclcpack vacuum cleaner 100 will now be described in use. When the user is in the area desired for vacuuming, the user dons the backpack vacuum cleaner 100 using the baclcpack strap system 160 in the same manner as putting on a backpack for hilcing.
This is easily performed because the baclcpack vacuum cleaner 100 is light-weight (2-12 lbs.). In the einbodiment shown, the vacuuin cleaner assembly 110 weighs 11 lbs., 3 oz.
The user's arms are placed through the shoulder straps 180 and the shoulder straps 180 are tightened to a snug, yet comfortable condition on the user's shoulders. The waist belt 190 is clipped together, and tightened to a snug, yet comfortable condition around the user's waist. Prior to or after doiming the backpack vacuum cleaner 100, the plug of the power cord assembly 240 is plugged into an electrical outlet. In an embodiment of the baclcpack vacuum cleaner 100 where the backpack vacuuin cleaner 100 has an onboard power source (e.g., one or more batteries, fuel cells), plugging the power cord assembly 240 into an electrical outlet to power the bacicpack vacuum cleaner 100 may not be necessary. The backpack vacuum cleaner 100 is switched on using the two-speed switch assembly 230.
The two-speed switch assembly 230 is also used to control the speed of the vacuum motor 290 between a high setting and low setting. In alternative embodiments, the baclkpack vacuuin cleaner 100 may have a nuinber of settings other than two settings (e.g., 1, 3, 4, etc.).
[37] In the embodiment shown, the backpack vacuum cleaner 100 performs @ about CFM with about 70 in. (H20) of lift @ about 65 dbA on a high-speed motor setting, and about 40 CFM with about 40 in. (H20) of lift @ about 61 dbA on a low-speed motor setting. In a preferred embodiment, the backpack vacuum cleaner 100 includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 0.6 and a suction (in. (H20)) to noise (dbA) ratio (suction/noise) of at least 0.6. In a more preferred embodiment, the baclcpaclc vacuum cleaner 100 includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 1.0 and a suction (in. (H20)) to noise (dbA) ratio (suction/noise) of at least 1Ø
[38] Witli the vacuum motor 290 activated, air, dirt, and debris are drawn through the vacuum cleaner floor tool 150, vacuum cleaner wand 140, vacuum cleaner hose 130, and air inlet 210 into the intake filter/refuse bag 265 (FIG. 3). The dirt and debris is collected by the intake filter/refuse bag 265 and air is drawn through the motor intake filter 280 and the vacuum motor 290. Exhaust air is expelled out of the bottom of the vacuum motor 290, and into the motor housing 310. The exhaust air reflects off of and is directed radially outward along the star-shaped, radiating ridges on the top surface 392. The exhaust air exits the motor housing 310 tllrough the Stage 1 slots 396. The exhaust air reflects off of the acoustic pane1330, dampening the sound level, around the bottom of the motor housing 310 and top of the quiet module housing 320, and into/through the Stage 2 slots 396 of the quiet module housing 320. The air then flows downward towards the director plate 340, and the director plate 340 directs the air flow radially inward and down towards the acoustic panel 360. Air flow reflects off of the acoustic panel 360, further dampening the sound level, and outward through the air diffuser foam 350. The air diffuser foam 350 filters out exhaust particulates in the exhaust air flow and further dampens the sound levels without significantly impeding air flow. The exhaust air impinges the acoustic panel 410 as it exits the air diffuser foam. The exhaust air then flows downward, tllrough the stage 3 slots 402, and out of the quiet exhaust assembly module 270.
[39] With reference to FIGS. 2, 5, and 6, the air inlet 210 has a 1.5 in.
intalce diaineter and an intake area of 1.77 sq. in. As indicated above, the total bypass area for the Stage 1 slots 384 is 7.125 sq. in., the total bypass area for the Stage 2 slots 396 is 6.0 sq. in., and the total bypass area for the Stage 3 slots 402 is 5.76 sq. in. The inventors have determined that it is desirable for the bypass areas in each stage of the quiet exhaust assembly module 270 to be at least 3 times that of the area of the air inlet 210. This reduces friction and, thus, minimizes flow loss.
[40] The exhaust assembly module 270 incorporates the principles of "Line of Sight"
and non-reflective surfaces to diminish sound levels (db). In the quiet exhaust assembly module 270, the vacuuin motor 290 is encapsulated in a housing, and air flow is directed to high-teinperature acoustic foam covered surfaces and through a condensed labyrinth of passages.
[41] The above features minimize the weight of the backpack vacuum cleaner 100, maximize dissipation of sound levels in the backpack vacuuin cleaner 100, and maximize air flow in the backpack vacuum cleaner 100.
[42] The above description of the disclosed embodiments is provided to enable any person slcilled in the art to malce or use the invention. Various modifications to these embodiments will be readily apparent to those slcilled in the art, and the generic principles described herein can be applied to other embodiments without departing fiom the spirit or scope of the invention. Thus, it is to be understood that the description and drawings presented herein represent a presently preferred embodiment of the invention and are therefore representative of the subject matter which is broadly contemplated by the present invention. It is further understood that the scope of the present invention fully encompasses other embodiments that may become obvious to those skilled in the art and that the scope of the present invention is accordingly limited by nothing other than the appended claims.
Claims (20)
1. A light-weight, quiet vacuum cleaner assembly for a backpack vacuum cleaner including a backpack assembly for carrying the vacuum cleaner assembly on a user's back, a vacuum cleaner hose for vacuuming debris from a surface, and a filter for filtering out vacuumed debris, comprising:
an air inlet for communicating with the vacuum cleaner hose and the filter;
a vacuum motor for drawing air through the vacuum cleaner hose, air inlet, and filter;
a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, wherein the vacuum cleaner assembly weighs 2-12lbs. and includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 0.6.
an air inlet for communicating with the vacuum cleaner hose and the filter;
a vacuum motor for drawing air through the vacuum cleaner hose, air inlet, and filter;
a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, wherein the vacuum cleaner assembly weighs 2-12lbs. and includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 0.6.
2. The light-weight, quiet vacuum cleaner assembly of claim 1, wherein the vacuum cleaner assembly includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 1Ø
3. The light-weight, quiet vacuum cleaner assembly of claim 1, wherein the vacuum cleaner assembly includes a suction (in. (H20)) to noise (dbA) ratio (suction/noise) of at least 0.6.
4. The light-weight, quiet vacuum cleaner assembly of claim 3, wherein the vacuum cleaner assembly includes a suction (in.(H2O)) to noise (dbA) ratio (suction/noise) of at least 1Ø
5. A light-weight, quiet vacuum cleaner assembly for a backpack vacuum cleaner including a backpack assembly for carrying the vacuum cleaner assembly on a user's back, a vacuum cleaner hose for vacuuming debris from a surface, and a filter for filtering out vacuumed debris, comprising:
an air inlet for communicating with the vacuum cleaner hose and the filter, the air inlet including an intake area;
a vacuum motor for drawing air through the vacuum cleaner hose, air inlet, and filter;
a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, wherein the quiet exhaust assembly module includes a stage of exhaust openings having a total area and the ratio of the total area of the stage of exhaust openings to the intake area of the air inlet is at least 3:1.
an air inlet for communicating with the vacuum cleaner hose and the filter, the air inlet including an intake area;
a vacuum motor for drawing air through the vacuum cleaner hose, air inlet, and filter;
a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, wherein the quiet exhaust assembly module includes a stage of exhaust openings having a total area and the ratio of the total area of the stage of exhaust openings to the intake area of the air inlet is at least 3:1.
6. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the quiet exhaust assembly module includes a motor housing with the stage of exhaust openings therein.
7. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the quiet exhaust assembly module includes a second stage of exhaust openings having a total area and the ratio of the total area of the second stage of exhaust openings to the intake area of the air inlet is at least 3:1.
8. The light-weight, quiet vacuum cleaner assembly of claim 7, wherein the quiet exhaust assembly module includes a quiet module housing with the second stage of exhaust openings therein.
9. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the quiet exhaust assembly module includes a third stage of exhaust openings having a total area and the ratio of the total area of the third stage of exhaust openings to the intake area of the air inlet is at least 3:1.
10. The light-weight, quiet vacuum cleaner assembly of claim 9, wherein the quiet exhaust assembly module includes a quiet module cap with the third stage of exhaust openings therein.
11. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the vacuum cleaner assembly weighs 2-12lbs. and includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 0.6.
12. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the vacuum cleaner assembly weighs 2-12 lbs. and includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 1Ø
13. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the vacuum cleaner assembly weighs 2-12 lbs. and includes a suction (in.(H2O)) to noise (dbA) ratio (suction/noise) of at least 0.6.
14. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the vacuum cleaner assembly weighs 2-12 lbs. and includes a suction (in.(H2O)) to noise (dbA) ratio (suction/noise) of at least 1Ø
15. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the quiet exhaust assembly module includes a light-weight, high-temperature, fire retardant foam material having a density no greater than 0.4 lb/ft3 to attenuate the exhaust sound.
16. The light-weight, quiet vacuum cleaner assembly of claim 15, wherein the light-weight, high-temperature, fire retardant foam material is a high-performance polyimide foam.
17. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the quiet exhaust assembly module includes a light-weight foam air diffuser having a density no greater than 1.9 lb/ft3 to attenuate the exhaust sound and filter out exhaust particles.
18. The light-weight, quiet vacuum cleaner assembly of claim 17, wherein the light-weight foam air diffuser is a reticulated flexible polyester urethane foam.
19. The light-weight, quiet vacuum cleaner assembly of claim 5, wherein the quiet exhaust assembly module includes an outer acoustic panel surrounding substantially all of the quiet exhaust assembly module, the acoustic panel including an outer surface with a polycarbonate sheet laminated thereto, and the polycarbonate sheet including hoop stress therein that causes the acoustic panel to be held in place, surrounding substantially all of the quiet exhaust assembly module, without any adhesive.
20. A light-weight, quiet vacuum cleaner assembly for a backpack vacuum cleaner including a backpack assembly for carrying the vacuum cleaner assembly on a user's back, a vacuum cleaner hose for vacuuming debris from a surface, and a filter for filtering out vacuumed debris, comprising:
an air inlet for communicating with the vacuum cleaner hose and the filter;
a vacuum motor for drawing air through the vacuum cleaner hose, air inlet, and filter;
a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, wherein the vacuum cleaner assembly weighs 2-12 lbs. and includes a suction (in.(H2O)) to noise (dbA) ratio (suction/noise) of at least 0.6.
an air inlet for communicating with the vacuum cleaner hose and the filter;
a vacuum motor for drawing air through the vacuum cleaner hose, air inlet, and filter;
a quiet exhaust assembly module in communication with the vacuum motor for expelling and quieting exhaust from the vacuum motor, wherein the vacuum cleaner assembly weighs 2-12 lbs. and includes a suction (in.(H2O)) to noise (dbA) ratio (suction/noise) of at least 0.6.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/240,660 | 2005-09-30 | ||
| US11/240,660 US20070174992A1 (en) | 2005-09-30 | 2005-09-30 | Quiet vacuum cleaner |
| PCT/US2006/036350 WO2007040976A2 (en) | 2005-09-30 | 2006-09-18 | Quiet vacuum cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2623482A1 true CA2623482A1 (en) | 2007-04-12 |
| CA2623482C CA2623482C (en) | 2014-11-18 |
Family
ID=37906650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2623482A Expired - Fee Related CA2623482C (en) | 2005-09-30 | 2006-09-18 | Quiet vacuum cleaner |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070174992A1 (en) |
| EP (1) | EP1937127B1 (en) |
| AT (1) | ATE505122T1 (en) |
| CA (1) | CA2623482C (en) |
| DE (1) | DE602006021332D1 (en) |
| WO (1) | WO2007040976A2 (en) |
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| US8152602B2 (en) * | 2009-01-30 | 2012-04-10 | JPL Global, LLC | Grinder and core drill with dust collection |
| US20110088309A1 (en) * | 2009-10-05 | 2011-04-21 | Emory University Office Of Technology Transfer | Device for capturing insects |
| US20130061419A1 (en) * | 2010-08-26 | 2013-03-14 | Richard B. Patrono | Propane vacuum |
| FR2967882B1 (en) * | 2010-11-25 | 2013-08-23 | Seb Sa | PRINCIPAL VACUUM BODY |
| US9259126B2 (en) | 2012-10-10 | 2016-02-16 | Electrolux Home Care Products, Inc. | Backpack vacuum cleaner |
| US9486120B2 (en) | 2013-07-17 | 2016-11-08 | Tacony Corporation | Wearer comfort backpack vacuum |
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| US10292558B2 (en) | 2015-02-25 | 2019-05-21 | M.D. Manufacturing, Inc. | Vacuum hose retraction system |
| US9675219B1 (en) * | 2015-04-15 | 2017-06-13 | Dustin Chaffin | Bagless vacuum cleaner |
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| JP6869635B2 (en) * | 2015-07-09 | 2021-05-12 | 株式会社マキタ | Dust collector |
| USD847446S1 (en) * | 2015-07-27 | 2019-04-30 | Mark Genoa | Cylinder for a backpack vacuum |
| US10219664B2 (en) | 2015-08-05 | 2019-03-05 | Tti (Macao Commercial Offshore) Limited | Vacuum cleaner and carrier assembly |
| USD804166S1 (en) * | 2016-04-18 | 2017-12-05 | Mark Anthony McCoy | Backpack |
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| JP7198104B2 (en) * | 2019-02-06 | 2022-12-28 | 株式会社マキタ | Cleaner |
| JP2020141795A (en) * | 2019-03-05 | 2020-09-10 | 株式会社マキタ | Knapsack type dust collector |
| JP7224967B2 (en) | 2019-03-05 | 2023-02-20 | 株式会社マキタ | upright dust collector |
| AU2020205211A1 (en) | 2019-08-02 | 2021-02-18 | Techtronic Cordless Gp | Blowers having noise reduction features |
| AU2020286200A1 (en) | 2020-01-21 | 2021-08-05 | Techtronic Cordless Gp | Power tool having noise reduction features |
| CN214742186U (en) | 2020-01-21 | 2021-11-16 | 创科无线普通合伙 | Blower fan |
| US11751735B2 (en) | 2020-06-01 | 2023-09-12 | M.D. Manufacturing, Inc. | Vacuum and hose retraction system |
| US12064026B2 (en) | 2021-08-24 | 2024-08-20 | Emerson Electric Co. | Interchangeable harness assembly for a user-worn electrical appliance |
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-
2005
- 2005-09-30 US US11/240,660 patent/US20070174992A1/en not_active Abandoned
-
2006
- 2006-09-18 WO PCT/US2006/036350 patent/WO2007040976A2/en active Application Filing
- 2006-09-18 EP EP06803808A patent/EP1937127B1/en not_active Not-in-force
- 2006-09-18 CA CA2623482A patent/CA2623482C/en not_active Expired - Fee Related
- 2006-09-18 AT AT06803808T patent/ATE505122T1/en not_active IP Right Cessation
- 2006-09-18 DE DE602006021332T patent/DE602006021332D1/en active Active
Also Published As
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|---|---|
| EP1937127A2 (en) | 2008-07-02 |
| DE602006021332D1 (en) | 2011-05-26 |
| US20070174992A1 (en) | 2007-08-02 |
| WO2007040976A3 (en) | 2007-07-26 |
| WO2007040976A2 (en) | 2007-04-12 |
| EP1937127A4 (en) | 2009-06-03 |
| ATE505122T1 (en) | 2011-04-15 |
| CA2623482C (en) | 2014-11-18 |
| EP1937127B1 (en) | 2011-04-13 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20160919 |