US20070174992A1 - Quiet vacuum cleaner - Google Patents

Quiet vacuum cleaner Download PDF

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Publication number
US20070174992A1
US20070174992A1 US11/240,660 US24066005A US2007174992A1 US 20070174992 A1 US20070174992 A1 US 20070174992A1 US 24066005 A US24066005 A US 24066005A US 2007174992 A1 US2007174992 A1 US 2007174992A1
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US
United States
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.)
Abandoned
Application number
US11/240,660
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English (en)
Inventor
Christopher Murray
Richard Vinson
Michael Shideler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ProTeam Inc
Original Assignee
ProTeam Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ProTeam Inc filed Critical ProTeam Inc
Priority to US11/240,660 priority Critical patent/US20070174992A1/en
Priority to DE602006021332T priority patent/DE602006021332D1/de
Priority to AT06803808T priority patent/ATE505122T1/de
Priority to EP06803808A priority patent/EP1937127B1/de
Priority to CA2623482A priority patent/CA2623482C/en
Priority to PCT/US2006/036350 priority patent/WO2007040976A2/en
Assigned to PROTEAM, INC. reassignment PROTEAM, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VINSON, RICHARD W., MURRAY, CHRISTOPHER W., SHIDELER, MICHAEL
Publication of US20070174992A1 publication Critical patent/US20070174992A1/en
Abandoned legal-status Critical Current

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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
    • A47L5/36—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

Definitions

  • the present invention relates, in general, to vacuum cleaners, and, in particular, to backpack 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 vacuum cleaner assembly and is connected to a vacuum cleaner wand.
  • a distal end of the vacuum cleaner wand includes a vacuum cleaner floor tool.
  • the cleaner carries the backpack vacuum cleaner on his or her back using the backpack assembly, and directs the vacuum cleaner tool for cleaning the floor surface through the wand.
  • much of the cleaning performed using backpack vacuum cleaners such as that done in office buildings or other commercial 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.
  • the noise sources are noises associated with the motor and air movement noise at the vacuum tools and exhaust.
  • the backpack 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.
  • 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 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.
  • CFM flow rate
  • dbA noise
  • 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 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 suction (in. (H 2 O)) to noise (dbA) ratio (suction/noise) of at least 0.6.
  • Another 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, 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, 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 intake area of the air inlet is at least 3:1.
  • 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;
  • FIG. 2 is perspective view of the backpack vacuum cleaner of FIG. 1 ;
  • 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 assembly, and paper filter bag hidden for clarity;
  • FIG. 4 is a front elevational view of a quiet exhaust assembly of the backpack vacuum cleaner with the rest of the backpack vacuum cleaner shown in phantom;
  • FIG. 5 is an enlarged front elevational view of the quiet exhaust assembly module of FIG. 4 with the exhaust air flow path shown;
  • FIG. 6 is an exploded perspective view of the quiet exhaust assembly module of FIGS. 4 and 5 .
  • FIGS. 1-6 With reference to FIGS. 1-6 , and initially FIGS. 1-3 , an embodiment of a quiet backpack vacuum cleaner 100 will be described.
  • 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.
  • 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 , which engages the carpet or other floor surface for cleaning the same.
  • the backpack assembly 120 includes a backpack strap system 160 connected to a vacuum cleaner support 170 , which carries the vacuum cleaner assembly 110 .
  • the backpack strap system 160 includes shoulder straps 180 and a waist belt 190 .
  • the vacuum 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 with 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 through respective cords.
  • the vacuum cleaner assembly 110 includes an upper filter section 250 and a lower electrical section 260 .
  • the upper filter section 250 includes an intake 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 .
  • 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 .
  • 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 .
  • the vacuum motor 290 is a two-stage vacuum motor having a cylindrical head with an underside.
  • 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 .
  • Threaded fasteners 380 are used to attach the vacuum motor 290 to the motor housing 310 .
  • the motor housing 310 has a generally cylindrical wall 382 with Stage 1 elongated lateral slots 384 near a bottom of the motor housing 310 .
  • 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.
  • Threaded fasteners 390 threadably engage the threaded bosses of the ribs 386 to attach the quiet module housing 320 to the motor housing 310 .
  • 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 housing 320 forms 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 .
  • the acoustic panel 330 includes two half-cylindrical members with an outer surface 398 .
  • the acoustic panel 330 is made of a unique, light-weight, 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 assembly 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 name Solimide® by INSPEC FOAMS, INC. of Plano, Tex.
  • the foam material has a density (ASTM D 3574, Test A) of 0.4 lb/ft 3 , and a tensile strength (ASTM D 3574, Test E) of 7 lb/in 2 .
  • the foam material has a thermal conductivity (ASTM C 518 at mean temperature of 75° F.) of 0.32 (BTU ⁇ in)/(hr ⁇ ft 3 ⁇ ° F.), and a continuous use temperature (recommended maximum) of 575° F.
  • 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 thickness of 22 mm (0.9 in.)) of 0, a smoke developed index (ASTM E 84-95, Tested at a thickness of 22 mm (0.9 in.)) of 10.
  • the foam material has a tensile strength retained of greater than 85% and a change in weight and dimensions of less than 3%.
  • the foam material has the following acoustical absorption coefficients (sabins/ft 2 ; 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/ft 2 ; 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.
  • 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 .
  • the annular foam air diffuser 350 serves to break up some line of sight in the quiet exhaust assembly 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, Pa.
  • the homogeneous structure of the diffuser 350 helps minimize the possibility of open channels which could drastically affect filter efficiency.
  • Each cell in the medium 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 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 decomposition and vaporization.
  • 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.
  • 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 components of the quiet module housing 320 together.
  • the quiet module cap 370 and threaded fastener 400 allow the quiet exhaust assembly module 270 to be easily field serviced.
  • the quiet exhaust assembly module 270 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 exhaust 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 .
  • 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 thermal protection device for shutting off the vacuum motor 290 when the temperature exceeds approximately 95° C.
  • the backpack vacuum cleaner 100 will now be described in use.
  • the user When the user is in the area desired for vacuuming, the user dons the backpack vacuum cleaner 100 using the backpack strap system 160 in the same manner as putting on a backpack for hiking. This is easily performed because the backpack vacuum cleaner 100 is light-weight (2-12 lbs.).
  • the vacuum 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.
  • the plug of the power cord assembly 240 Prior to or after donning the backpack vacuum cleaner 100 , the plug of the power cord assembly 240 is plugged into an electrical outlet.
  • the backpack vacuum cleaner 100 where the backpack vacuum 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 backpack 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.
  • the backpack vacuum cleaner 100 may have a number of settings other than two settings (e.g., 1, 3, 4, etc.).
  • the backpack vacuum cleaner 100 performs (about 70 CFM with about 70 in. (H 2 O) of lift @ about 65 dbA on a high-speed motor setting, and about 40 CFM with about 40 in. (H 2 O) of lift @ about 61 dbA on a low-speed motor setting.
  • 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. (H 2 O)) to noise (dbA) ratio (suction/noise) of at least 0.6.
  • the backpack vacuum cleaner 100 includes a flow rate (CFM) to noise (dbA) ratio (flow rate/noise) of at least 1.0 and a suction (in. (H 2 O)) to noise (dbA) ratio (suction/noise) of at least 1.0.
  • CFM flow rate
  • dbA noise
  • suction/noise suction/noise
  • the exhaust air reflects off of the acoustic panel 330 , 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, through the stage 3 slots 402 , and out of the quiet exhaust assembly module 270 .
  • the air inlet 210 has a 1.5 in. intake diameter and an intake area of 1.77 sq. in.
  • 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.
  • 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.
  • the exhaust assembly module 270 incorporates the principles of “Line of Sight” and non-reflective surfaces to diminish sound levels (db).
  • the vacuum motor 290 is encapsulated in a housing, and air flow is directed to high-temperature acoustic foam covered surfaces and through a condensed labyrinth of passages.
  • the above features minimize the weight of the backpack vacuum cleaner 100 , maximize dissipation of sound levels in the backpack vacuum cleaner 100 , and maximize air flow in the backpack vacuum cleaner 100 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Manipulator (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Jellies, Jams, And Syrups (AREA)
US11/240,660 2005-09-30 2005-09-30 Quiet vacuum cleaner Abandoned US20070174992A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US11/240,660 US20070174992A1 (en) 2005-09-30 2005-09-30 Quiet vacuum cleaner
DE602006021332T DE602006021332D1 (de) 2005-09-30 2006-09-18 Leiser staubsauger
AT06803808T ATE505122T1 (de) 2005-09-30 2006-09-18 Leiser staubsauger
EP06803808A EP1937127B1 (de) 2005-09-30 2006-09-18 Leiser staubsauger
CA2623482A CA2623482C (en) 2005-09-30 2006-09-18 Quiet vacuum cleaner
PCT/US2006/036350 WO2007040976A2 (en) 2005-09-30 2006-09-18 Quiet vacuum cleaner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/240,660 US20070174992A1 (en) 2005-09-30 2005-09-30 Quiet vacuum cleaner

Publications (1)

Publication Number Publication Date
US20070174992A1 true US20070174992A1 (en) 2007-08-02

Family

ID=37906650

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/240,660 Abandoned US20070174992A1 (en) 2005-09-30 2005-09-30 Quiet vacuum cleaner

Country Status (6)

Country Link
US (1) US20070174992A1 (de)
EP (1) EP1937127B1 (de)
AT (1) ATE505122T1 (de)
CA (1) CA2623482C (de)
DE (1) DE602006021332D1 (de)
WO (1) WO2007040976A2 (de)

Cited By (27)

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USD581113S1 (en) 2007-11-26 2008-11-18 Emerson Electric Co. Backpack vacuum cleaner
US20100197211A1 (en) * 2009-01-30 2010-08-05 Guth Paul W 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
USD686789S1 (en) * 2012-04-18 2013-07-23 Montgomery Bisson Backpack vacuum cleaner
USD696479S1 (en) * 2012-10-12 2013-12-24 Electrolux Home Care Products, Inc. Backpack vacuum cleaner
USD707901S1 (en) * 2013-01-03 2014-06-24 Vornado Air, Llc Backpack steam cleaner
US9259126B2 (en) 2012-10-10 2016-02-16 Electrolux Home Care Products, Inc. Backpack vacuum cleaner
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US9456722B2 (en) 2013-08-13 2016-10-04 Emerson Electric Co. Backpack vacuum cleaner
US9486120B2 (en) 2013-07-17 2016-11-08 Tacony Corporation Wearer comfort backpack vacuum
US20170007085A1 (en) * 2015-07-09 2017-01-12 Makita Corporation Dust collector
JP2017018567A (ja) * 2015-07-09 2017-01-26 株式会社マキタ 集塵機
US9675219B1 (en) * 2015-04-15 2017-06-13 Dustin Chaffin Bagless vacuum cleaner
USD804166S1 (en) * 2016-04-18 2017-12-05 Mark Anthony McCoy Backpack
US10219664B2 (en) 2015-08-05 2019-03-05 Tti (Macao Commercial Offshore) Limited Vacuum cleaner and carrier assembly
USD847446S1 (en) * 2015-07-27 2019-04-30 Mark Genoa Cylinder for a backpack vacuum
JP2020141795A (ja) * 2019-03-05 2020-09-10 株式会社マキタ 背負い式集じん機
US11191405B2 (en) * 2019-02-06 2021-12-07 Makita Corporation Vacuum cleaner
US11434929B2 (en) 2019-08-02 2022-09-06 Techtronic Cordless Gp Blowers having noise reduction features
US11707176B2 (en) 2019-03-05 2023-07-25 Makita Corporation Upright vacuum cleaner
US11751735B2 (en) 2020-06-01 2023-09-12 M.D. Manufacturing, Inc. Vacuum and hose retraction system
US11778960B2 (en) 2020-01-21 2023-10-10 Techtronic Cordless Gp Blowers
US11817073B2 (en) 2020-01-21 2023-11-14 Techtronic Cordless Gp Power tool having noise reduction features
US12064026B2 (en) 2021-08-24 2024-08-20 Emerson Electric Co. Interchangeable harness assembly for a user-worn electrical appliance
USD1047325S1 (en) * 2021-08-24 2024-10-15 Emerson Electric Co. Backpack vacuum cleaner
DE102020105659B4 (de) 2019-03-05 2025-10-02 Makita Corporation Rucksackstaubsammler

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DK3238592T3 (da) 2016-04-27 2021-07-19 Diversey Inc Støvsuger
USD1089908S1 (en) * 2023-08-16 2025-08-19 Cody Mathew Williams Rake apparatus

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EP1937127A4 (de) 2009-06-03
DE602006021332D1 (de) 2011-05-26
CA2623482A1 (en) 2007-04-12
WO2007040976A3 (en) 2007-07-26
CA2623482C (en) 2014-11-18
EP1937127A2 (de) 2008-07-02
ATE505122T1 (de) 2011-04-15
EP1937127B1 (de) 2011-04-13
WO2007040976A2 (en) 2007-04-12

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