CA2061469C - Cyclonic back-pack vacuum cleaner - Google Patents
Cyclonic back-pack vacuum cleanerInfo
- Publication number
- CA2061469C CA2061469C CA 2061469 CA2061469A CA2061469C CA 2061469 C CA2061469 C CA 2061469C CA 2061469 CA2061469 CA 2061469 CA 2061469 A CA2061469 A CA 2061469A CA 2061469 C CA2061469 C CA 2061469C
- Authority
- CA
- Canada
- Prior art keywords
- cyclone
- vacuum cleaner
- air
- upper casing
- exit port
- 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.)
- Expired - Fee Related
Links
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
- 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
- A47L9/12—Dry filters
- A47L9/127—Dry filters tube- or sleeve-shaped
-
- 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
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1616—Multiple arrangement thereof
- A47L9/1625—Multiple arrangement thereof for series flow
- A47L9/1633—Concentric cyclones
Abstract
A back-pack vacuum cleaner comprises a back-pack harness, an upper casing attached to the harness and a lower casing rotatably mounted on the upper casing. A cyclonic cleaning assembly is mounted within the upper casing such that at least part of the assembly extends into the lower casing. The motor is positioned within the upper casing above the cyclonic cleaning assembly.
Description
206~4~9 ~ yrT~l ~ gAcK-PACK VACULIM CL2ANER
F TT~T.n nT~ I h V h .~, 1 ( 1 The present invention relates to vacuum cleaners which have a harness 80 that they may be worn as a back-5 pack by the operator. In particular, it relates to vacuumAnf~r~ of the cyclonic type.
OF ~ INVP~l-rTo~
There are various types of vacuum rl~ner~ including upright vacuum cleaner6 and canister vacuum cleaners. An 10 upright vacuum cleaner comprises two main sections namely a ground engaging portion mounted on wheels and a dirt collection portion which is pivotably mounted above the ground engaging portion . The ground ~nga~i n~ portion includes a cleaning head and a motor. The dirt collection 15 portion includes a filtration means for separating entrained dirt from the intake air and means for 6toring the separated dirt.
Canister vacuum cleaner~ are substantially cylindrical in shape and comprise a rigid outer container 20 and a hose a~sembly. The rigid outer container is mounted on wheels for ease of v ~ ~ L. The outer container is substantially cylindrical in shape and has a side which is substantially circular in cross-section. The wheels may be mounted either on the side of the container 80 that the 25 longitudinal axis of the canister extends horizontally or on one end of the canister 80 that the longitudinal axis of the canister extends vertically. If the unit is horizontally disposed, the hose assemby is mounted on one end of the outer container. A dirt filter and collector, 30 such as a bag, is positioned adjacent that end of the container and a motor is positioned behind the dirt filter and collector. In operation, the dirty air passes through the hose into the dirt filter and collector and the filtered air passes by the motor before exiting the vacuum 35 cleaner. Alternately, when the vacuum cleaner is - 2 _ 2~1469 vertically disposed, the motor ls mounted on top of the outer container and the motor and/or the f ilter means may extend into the outer container. The outer container has an air entry port to which the hose assembly is mounted.
5 In operation, the dirty air passes through the hose into the outer container and is then f iltered prior to exiting the machine.
In canister vacuum cleaners a cleaning head is attached to the end of the hose assembly distal to the 10 entry port on the outer container. This design results in a cleaning head which is small and manouverable. However, canister vacuum ~eitnF~r~; have several disadvantages. If the unit is vertically disposed, the dirt will collect in the bottom of the outer container and the air entry port 15 must be located near the upper portion of the outer container. Otherwise, the entry port would become clogged with dirt and this would decrease the efficiency of the vacuum cleaner. The motor and filter ----h IniRm are mounted near the upper portion of the canister vacuum cleaner and 20 accordingly the centre of gravity of the machine i8 relatively high. In operation, the operator typically moves these r-~hin~ by pulling on the hose, which is attached to the outer container. The raised centre of gravity of the machine results in the machine being top 25 heavy and prone to tipping. Further, since a friction fit may be used to removably mount the hose assembly in the entry port, it is occasionally necessary for the operator to cease operation and re-insert the hose to maintain a hermetic seal which is loosened by pulling on the hose 30 assembly.
Accordingly, canister r-~h~n~ and in particular vertically disposed canister vacuum cleaners, can most conveniently be used within a circle having a radius somewhat smaller than the length of the hose assembly.
35 Outside such a circle, the machine must be carefully moved from position to position to avoid tipping the machine.
These machines are typically awkward to move and care is 206146~
also required to avoid hitting and damaging walls and furniture .
Upright vacuum cleaners have the advantage that the motor i6 mounted in the ground engaging portion.
Accordingly, the centre of the gravity of the machine is ad~ acent to the ground and the m-Ah i n~ are not prone to tipping. In the past, these r--h~n~c have typically comprised a filter --- h~n~m which may be a cloth or paper bag. More recently, dual cyclonic upright vacuum cleaners have been developed . These upright m~~h ~ n~c utilize cyclonic action or centrifugal force to separate the entrained dirt from the intake air. As is shown in t~n;~ n Patent Nos. 1,182,613; 1,238,869 and 1,241,158, a cyclonic vacuum cleaner may utilize first and second cyclones which are connected in series. The first or outer cyclone is designed to remove the larger and heavier dirt particles which are entrained in the intake air and the second or inner cyclone is used to remove the finer and lighter particles which are entrained in the exhaust air from the first cyclone.
One of the disadvantages with upright vacuum cleaners is that during operation, the entire machine is continually being moved by the operator. This results in the operator ': ~ - i n~ tired. Further, the ground engaging portion is relatively large and must be moved with care around furniture and other obstacles. Due to its size, the ground engaging portion may be too large to clean confined spaces. Thus, these r-Ahin~c are often designed to accept a hose assembly 80 that the upright vacuum cleaner may be used in a canister mode. This results in additional design complexities. Further, the operator must also carry around the hose assembly. These problems are accentuated in a commercial environment where an operator may use a machine for several hours at one time to clean large areas.
Another type oL vacuum cleaner is the back-p~ck vacuum cleaner. Examples of such m-^h i nF~ are the QUARTER-VAC, the MEGAVAC, the POCKET VAC, the OPTIMUS 1 and the 2~61469 , LINEVACER . These r~~h i n~s have a upper portion which contains a filter bag or other filter medium. The motor is located ad~acent the bottom of the vacuum cleaner below the filter means. The hose assembly is connected to the 5 top of the machine so that the intake air passes from the top of the machine through the filter means, past the motor and i8 then exhausted from the machine.
Back-pack vacuum cleaners have been used in the commercial environment, and accordingly they must be worn 10 by the operator for several hours at a time and, possibly, for an entire shift. Due to the nature of existing designs, these r^-hinF~ feel heavy and uncomfortable and accordingly they are not desirable for extended hours of use .
15 Sl]l5~1ARY OF T~R lhv~ ON
It has been found that these disadvantages can be overcome by using a cyclonic vacuum cleaner which comprises a back-pack harness, an upper casing attached to the harness, a lower casing releasably mounted on the 20 upper casing, at least one cyclone mounted with at least the lower part thereof positioned within the lower casing, a motor positioned within the upper casing above the at least one cyclone, an air entry means providing an air flow path from outside the vacuum cleaner to the at least 25 one cyclone and an air exit means providing an air flow path from the at least one cyclone to outside the vacuum cleaner .
Preferably, the vacuum cleaner comprises a first cyclone and a second cyclone in series. The inr; In9 air 30 enters the first cyclone and passes from the exit of the first cyclone to the entrance of the second cyclone. The air exits from the second cyclone and preferably is used to cool the motor which is located above the exit from the second cyclone. The air entry means may comprise a port 35 for supplying dirt laden air tangentially to the first cyclone to produce cyclonic rotation of the dirt laden air within the first cyclone. The air entry port may be 2~ 9 located near the top of the first cyclone.
The lower casing may comprise the outer wall of the first cyclone and the air entry port may be positioned at the upper portion thereof. The lower casing may be substantially circular in cross-section such that the lower casing may be rotated relative to the upper casing thus permitting the air entry port to be positioned either on the right hand side or the left hand side of the vacuum cleaner to permit ease of use by a right handed operator or a left handed operator.
The air exit means may comprise one port on the upper part of the casing. The exit port may be positioned and configured to direct air flow away from the operator.
Further, the exit port may be adapted to receive a hose so that the vacuum cleaner may also be used as a blower.
Alternately, or in addition, the exit port may be adapted to receive a filter such that, after passing through said filter, over 9996 of O . 3 micrometer size particles have been removed from the incoming dirt laden air.
In contrast to prior vacuum cleaners, this design provides a vacuum cleaner which is ~9~ i r . The vacuum cleaner i8 easy to operate and light weight 80 that it may be worn for an extended period of time by the operator. Further, the vacuum cleaner has an improved filtering --- h~niPm while maintaining a light weight des ign .
The substance and advantages of the present invention will be more fully and completely described in accordance with following description, and the ~cc~ ~-nying drawings, of a preferred embodiment of the invention .
sRIEF r~r~RTpTIQ~ OF ~ TNvRN~
Figure 1 is a perspective view of a vacuum cleaner according to the lnvention, when worn by an operator;
Figure 2 is a perspective view of the front of 206i469 the vacuum cleaner of Figure l;
Figure 3 i8 a perspective view from the rear of the vacuum cleaner of Figure 1 with the lower c~sing removed; and, Figure 4 i8 a cross-section along line 4-4A of the vacuum cleaner of Figure 3.
Figure 5 is an exploded view of the after filter shown in Figures 1-4.
nR~ATT-Rn r~R-C~'RTPTIQN OF ~ RMR~nTMRr~
As shown in Figure 1, vacuum cleaner 10 comprises a harness 12, an upper casing 14 and a lower casing 16. The vacuum cleaner is adapted to receive a hose assembly 18. Hose assembly 18 may be of any desired length and, preferably, is designed to receive a variety of interchangeable cleaning heads as may be required.
The back-pack harness may be of any design known in the art. Harness 12 has a back plate 20, two shoulder straps 22 and a waist strap 24. Male and female buckle members 26 and 28 are fixed at the two ends of waist strap 24. sack plate 20 extends from a point near the top of upper casing 14 to a position ad~acent the central portion of lower casing 16. The back plate is dimensioned and c~nf i gllred 80 as to be comfortably mounted on the back of the operator. Shoulder straps 22 are individually ad~usted by means known in the art to mount the vacuum cleaner at the proper height for each operator. Similarly, waist strap 24 is ad~ustable 80 as to fit around the waist of any operator.
In use, the operator may easily put on the vacuum cleaner and ad~ust it to fit their body. The operator places his arms through shoulder straps 22 and secures waist strap 24 by inserting male buckle member 26 into female buckle member 28. The shoulder straps and waist straps may then be ad~usted to fit the operator.
Upper casing 14 has a side wall which is substantially cylindrical. The upper ca8ing may be attached to the harness by numerous means. As shown in the _ 7 _ 2~1 469 Figures, two protrusions 30 extend outwardly from a position near the front of cylindrical housing 14. Back plate 20 may be secured to these protrusions by any means known in the art. A8 shown in Figure 2, back plate 20 is secured to protrusions 30 by means of a plurality of screws 32.
The electric cord 34 may be attached to upper casing 14 at any desired point. It has been found advantageous to attach electric cord 34 to one of the protrusions 30. This results in the electrical cord being positioned at a point where it does not interfere with the of the ho~e assembly but where it may be easily grasped by the operator. On/off switch 36 is attached to upper housing 14 by means of control cord 38. By using a control cord, the vacuum cleaner may easily be turned on and of f by the operator while wearing the vacuum cleaner .
Similarly, as with the electric cord, the control cord may be attached to the vacuum cleaner at any desired location.
Once again, it has been found advantageous to locate control cord 38 on one of protrusions 30. If desired, an electrical outlet (not Ehown) may also be provided on protrusion 30. This would be advantageou~ if a VA.-llllmin~
head having an electrically driven motor were to be attached to the vacuum cleaner.
Air exit port 40 is located near the top of upper casing 14. A8 shown in Figure 1, air exit port 40 is positioned and configured to direct air flow away from the operator. The upper portion of upper casing 14 comprises a bevelled surface 42 and a top 44. I~hile air exit port 40 is positioned on bevelled surface 42 in the Figures, by suitably adapting the conf iguration of the air exit port, the air exit port may be positioned at an alternate location on bevelled surface 42 or on top surface 44.
Preferably, air exit port 40 is adapted to receive a hose. By this ~l~f~l-Ation, the vacuum cleaner may be tran~formed into a blower. This expands the potential use of the vacuum cleaner.
- 8 _ 20~ 9 The use of dual cyclones in a vacuum cleaner results in a high level of particulate removal from the entrained air, including relatively small particles.
However, when used in a toxic environment or in a clean 5 room, the particulate emissions from vacuum cleaners must be exceptionally low, for example in the order of 99 . 99~
of 0 . 3 micron particles. To meet this requirement, an after-f ilter may be installed on vacuum cleaner 10 . This may be accomplished by adapting air exit port 40 to 10 receive a filter. Preferably, the filter is positioned F~xt~rn;l 1 to the upper casing . As shown in Figures 3 and 4, the after filter comprises a conical bottom portion 100, a top portion 102 and a filter 104. Bottom portion 100 has a base 106 which is securely attached to air exit port 15 40. Due to the pressure which builds up in the filter, the filter must be securely fixed to port 40. A suitable means of rPl~ hly securing the filter to air exit port 40 is by use of a boyonet mount 108. The exact size and shape of filter 104 will vary d~r~n~lin~ upon the 20 particular emission standards which are set for use in various instances. However, by the use of an after-filter, it is possible to remove over 99 . 99~ of 0 . 3 micron size particles form the dirt laden intake air. As shown in the Figures, filer 104 is in the shape of an annulus. Top 25 portion 102 has a plurality of circumferentially spaced vents 110. In operation, the air enters through base 106 and passes into the centre of filter 104. The air passes through filter 104 and exits through vents 110.
By this modification, an after-filter may easily 30 be added when required. The after-filter is a high efficiency and, preferably, high air flow filter. An example of a suitable f ilter material is HEPA or IrLPA
brand filter media. This material is an expensive synthetic material. By positioning the filter after the 35 dual cyclones, the exhaust air has been substantially cleaned by the time it reaches the f ilter . This greatly increases the filter life. Further, the filter will act to 9 2~4~9 an extent as a muffler to decrease the noise from the motor .
Lower caslng 16 is r~ R~hly mounted on upper casing 14 by any means known in the art which provides a 5 hermetic seal. In the preferred ~o~ , latches 46 are provided ad~acent the lower portion of upper casing 14.
One latch may be positioned on either side of upper casing 14. Each latch 46 ha~ an arm 48 which is pivotably mounted to the upper casing 14. The distal end of each arm 48 has 10 a hook 50. This hook is designed to engage with rim 52 of lower housing 16. When lower casing 16 is mounted on upper casing 14, latches 46, in con~unction with rim 52, result in an air tight seal which avoids any pressure drop in the cyclone c~h ''`rR.
Lower casing 16 has a receiving chamber 54 positioned ad~acent its lower portion 66. Purther, air entry port 56 is positioned adjacent the upper portion of lower casing 16. Air entry port 56 is configured to supply dirt laden air tangentially to the interior surface of 20 lower casing 16. Air entry port 56 is configured to receive hose assembly 18.
Since air entry port 56 is positioned on lower casing 16, the air entry port may be positioned either on the left hand side or the right hand side of the unit 25 simply by rotating lower casing 16 relative to upper cas$ng 14 prior to engaging latches 46. By this ad~ustment, the vacuum cleaner may be used either by a right handed operator or a lef t handed operator .
~he vacuum cleaner has a cyclonic cleaning 30 assembly. Cyclone assembly 60 is mounted on upper casing 16 such that at least the lower part of the as~embly is positioned within the lower casing 16. Preferably, as shown in Figure 3 substantially all of cyclone assembly 60 is positioned within lower casing 16. Cyclone assembly 60 35 may be of any cyclone design which is known in the art of vacuum cleaners and compri~es at least one cyclone.
Preferably, the cyclone assembly comprises a first cyclone lO- 20~469 chamber and a second cyclone chamber in series and, for compactness, it is preferred to have the two cyclones mounted coax~ y as shown in Figure 4. Referring to Figure 4, the f irst cyclone chamber is denoted by reference numeral 62 and the second cyclone chamber is denoted by reference numeral 64. The air enters the vacuum cleaner via air entry port 56. A centrifugal force is applied to the dirt laden air causing the dirt laden air to rotate within first cyclone chamber 62. The larger and heavier dirt is deposited in the lower portion of lower casing 16 (denoted by reference numeral 66). The air exits from the first cyclone chamber via first cyclone air exit 68 to passage 70. The air travels through passage 70 to second air entry port 72. Second air entry port 72 imparts a tangential flow to the air causing the air to circulate in a cyclonic pattern within second cyclone chamber 74.
The finer dirt particles are deposited in receiving chamber 54 and the cleaned air is evacuated from the second cyclone chamber through second cyclone air exit 74.
Notor 80 is positioned within upper casing 14 above the cyclone chambers. Motor 80 may be mounted to upper casing 14 by any means known in the art which dampens vibrations from the motor. As shown in Figure 4, a plate 82, which is part of the upper casing, is positioned on top of the cyclone chambers. The plate seals the cyclone ~h ` ~ to prevent any pressure drop. Second cyclone air exit 74 is positioned at the centre of plate 82. Rubber gasket 84 is positioned above plate 82. Motor 80 is then positioned on top of rubber gasket 84. The gasket prevents air leakage between the motor and cyclone air exit 74 and provides shock absorbing so as to dampen vibration from the motor. Cap 86 is placed on top of the motor and the entire assembly is secured into place by means of z-shaped clamp 88. Clamp 88 is secured to upper casing 14 by means of lower screw posts 90 and upper screw posts 92.
This conf iguration provides several advantages .
.
11- 2~469 Flrst, by locating the motor at the top of the vacuum cleaner, the el~, iC5 are subgtantially i uv~d. It has surprisingly been found that the use of this configuration provides a vacuum cleaner which feels very light weight 5 and comfortable to the operator. This is achieved in part by mounting the motor at the top contrary to what has been utilized in previous designs. With the bulk of the mass of the vacuum cleaner (the motor) at the top, the unit is more securely held to the operator 8 back and tends to lO swing less and have less free motion than if the motor were at the bottom. This design results in the motor being substantially closer to the operator 8 ears than those utilized in previous designs. Despite this clo~c~n~P~ it has also surprisingly been fûund that the design is 15 relatively quiet and may be used for extended periods of time without the need to apply expensive sound absorbing insulation to the upper casing. The sound level can be further reduced, as mentioned, by using a filter at air exit 40. Further, by positioning motor 80 directly above 20 second cyclone air exit 74, the clean air may be used to cool the motor.
F TT~T.n nT~ I h V h .~, 1 ( 1 The present invention relates to vacuum cleaners which have a harness 80 that they may be worn as a back-5 pack by the operator. In particular, it relates to vacuumAnf~r~ of the cyclonic type.
OF ~ INVP~l-rTo~
There are various types of vacuum rl~ner~ including upright vacuum cleaner6 and canister vacuum cleaners. An 10 upright vacuum cleaner comprises two main sections namely a ground engaging portion mounted on wheels and a dirt collection portion which is pivotably mounted above the ground engaging portion . The ground ~nga~i n~ portion includes a cleaning head and a motor. The dirt collection 15 portion includes a filtration means for separating entrained dirt from the intake air and means for 6toring the separated dirt.
Canister vacuum cleaner~ are substantially cylindrical in shape and comprise a rigid outer container 20 and a hose a~sembly. The rigid outer container is mounted on wheels for ease of v ~ ~ L. The outer container is substantially cylindrical in shape and has a side which is substantially circular in cross-section. The wheels may be mounted either on the side of the container 80 that the 25 longitudinal axis of the canister extends horizontally or on one end of the canister 80 that the longitudinal axis of the canister extends vertically. If the unit is horizontally disposed, the hose assemby is mounted on one end of the outer container. A dirt filter and collector, 30 such as a bag, is positioned adjacent that end of the container and a motor is positioned behind the dirt filter and collector. In operation, the dirty air passes through the hose into the dirt filter and collector and the filtered air passes by the motor before exiting the vacuum 35 cleaner. Alternately, when the vacuum cleaner is - 2 _ 2~1469 vertically disposed, the motor ls mounted on top of the outer container and the motor and/or the f ilter means may extend into the outer container. The outer container has an air entry port to which the hose assembly is mounted.
5 In operation, the dirty air passes through the hose into the outer container and is then f iltered prior to exiting the machine.
In canister vacuum cleaners a cleaning head is attached to the end of the hose assembly distal to the 10 entry port on the outer container. This design results in a cleaning head which is small and manouverable. However, canister vacuum ~eitnF~r~; have several disadvantages. If the unit is vertically disposed, the dirt will collect in the bottom of the outer container and the air entry port 15 must be located near the upper portion of the outer container. Otherwise, the entry port would become clogged with dirt and this would decrease the efficiency of the vacuum cleaner. The motor and filter ----h IniRm are mounted near the upper portion of the canister vacuum cleaner and 20 accordingly the centre of gravity of the machine i8 relatively high. In operation, the operator typically moves these r-~hin~ by pulling on the hose, which is attached to the outer container. The raised centre of gravity of the machine results in the machine being top 25 heavy and prone to tipping. Further, since a friction fit may be used to removably mount the hose assembly in the entry port, it is occasionally necessary for the operator to cease operation and re-insert the hose to maintain a hermetic seal which is loosened by pulling on the hose 30 assembly.
Accordingly, canister r-~h~n~ and in particular vertically disposed canister vacuum cleaners, can most conveniently be used within a circle having a radius somewhat smaller than the length of the hose assembly.
35 Outside such a circle, the machine must be carefully moved from position to position to avoid tipping the machine.
These machines are typically awkward to move and care is 206146~
also required to avoid hitting and damaging walls and furniture .
Upright vacuum cleaners have the advantage that the motor i6 mounted in the ground engaging portion.
Accordingly, the centre of the gravity of the machine is ad~ acent to the ground and the m-Ah i n~ are not prone to tipping. In the past, these r--h~n~c have typically comprised a filter --- h~n~m which may be a cloth or paper bag. More recently, dual cyclonic upright vacuum cleaners have been developed . These upright m~~h ~ n~c utilize cyclonic action or centrifugal force to separate the entrained dirt from the intake air. As is shown in t~n;~ n Patent Nos. 1,182,613; 1,238,869 and 1,241,158, a cyclonic vacuum cleaner may utilize first and second cyclones which are connected in series. The first or outer cyclone is designed to remove the larger and heavier dirt particles which are entrained in the intake air and the second or inner cyclone is used to remove the finer and lighter particles which are entrained in the exhaust air from the first cyclone.
One of the disadvantages with upright vacuum cleaners is that during operation, the entire machine is continually being moved by the operator. This results in the operator ': ~ - i n~ tired. Further, the ground engaging portion is relatively large and must be moved with care around furniture and other obstacles. Due to its size, the ground engaging portion may be too large to clean confined spaces. Thus, these r-Ahin~c are often designed to accept a hose assembly 80 that the upright vacuum cleaner may be used in a canister mode. This results in additional design complexities. Further, the operator must also carry around the hose assembly. These problems are accentuated in a commercial environment where an operator may use a machine for several hours at one time to clean large areas.
Another type oL vacuum cleaner is the back-p~ck vacuum cleaner. Examples of such m-^h i nF~ are the QUARTER-VAC, the MEGAVAC, the POCKET VAC, the OPTIMUS 1 and the 2~61469 , LINEVACER . These r~~h i n~s have a upper portion which contains a filter bag or other filter medium. The motor is located ad~acent the bottom of the vacuum cleaner below the filter means. The hose assembly is connected to the 5 top of the machine so that the intake air passes from the top of the machine through the filter means, past the motor and i8 then exhausted from the machine.
Back-pack vacuum cleaners have been used in the commercial environment, and accordingly they must be worn 10 by the operator for several hours at a time and, possibly, for an entire shift. Due to the nature of existing designs, these r^-hinF~ feel heavy and uncomfortable and accordingly they are not desirable for extended hours of use .
15 Sl]l5~1ARY OF T~R lhv~ ON
It has been found that these disadvantages can be overcome by using a cyclonic vacuum cleaner which comprises a back-pack harness, an upper casing attached to the harness, a lower casing releasably mounted on the 20 upper casing, at least one cyclone mounted with at least the lower part thereof positioned within the lower casing, a motor positioned within the upper casing above the at least one cyclone, an air entry means providing an air flow path from outside the vacuum cleaner to the at least 25 one cyclone and an air exit means providing an air flow path from the at least one cyclone to outside the vacuum cleaner .
Preferably, the vacuum cleaner comprises a first cyclone and a second cyclone in series. The inr; In9 air 30 enters the first cyclone and passes from the exit of the first cyclone to the entrance of the second cyclone. The air exits from the second cyclone and preferably is used to cool the motor which is located above the exit from the second cyclone. The air entry means may comprise a port 35 for supplying dirt laden air tangentially to the first cyclone to produce cyclonic rotation of the dirt laden air within the first cyclone. The air entry port may be 2~ 9 located near the top of the first cyclone.
The lower casing may comprise the outer wall of the first cyclone and the air entry port may be positioned at the upper portion thereof. The lower casing may be substantially circular in cross-section such that the lower casing may be rotated relative to the upper casing thus permitting the air entry port to be positioned either on the right hand side or the left hand side of the vacuum cleaner to permit ease of use by a right handed operator or a left handed operator.
The air exit means may comprise one port on the upper part of the casing. The exit port may be positioned and configured to direct air flow away from the operator.
Further, the exit port may be adapted to receive a hose so that the vacuum cleaner may also be used as a blower.
Alternately, or in addition, the exit port may be adapted to receive a filter such that, after passing through said filter, over 9996 of O . 3 micrometer size particles have been removed from the incoming dirt laden air.
In contrast to prior vacuum cleaners, this design provides a vacuum cleaner which is ~9~ i r . The vacuum cleaner i8 easy to operate and light weight 80 that it may be worn for an extended period of time by the operator. Further, the vacuum cleaner has an improved filtering --- h~niPm while maintaining a light weight des ign .
The substance and advantages of the present invention will be more fully and completely described in accordance with following description, and the ~cc~ ~-nying drawings, of a preferred embodiment of the invention .
sRIEF r~r~RTpTIQ~ OF ~ TNvRN~
Figure 1 is a perspective view of a vacuum cleaner according to the lnvention, when worn by an operator;
Figure 2 is a perspective view of the front of 206i469 the vacuum cleaner of Figure l;
Figure 3 i8 a perspective view from the rear of the vacuum cleaner of Figure 1 with the lower c~sing removed; and, Figure 4 i8 a cross-section along line 4-4A of the vacuum cleaner of Figure 3.
Figure 5 is an exploded view of the after filter shown in Figures 1-4.
nR~ATT-Rn r~R-C~'RTPTIQN OF ~ RMR~nTMRr~
As shown in Figure 1, vacuum cleaner 10 comprises a harness 12, an upper casing 14 and a lower casing 16. The vacuum cleaner is adapted to receive a hose assembly 18. Hose assembly 18 may be of any desired length and, preferably, is designed to receive a variety of interchangeable cleaning heads as may be required.
The back-pack harness may be of any design known in the art. Harness 12 has a back plate 20, two shoulder straps 22 and a waist strap 24. Male and female buckle members 26 and 28 are fixed at the two ends of waist strap 24. sack plate 20 extends from a point near the top of upper casing 14 to a position ad~acent the central portion of lower casing 16. The back plate is dimensioned and c~nf i gllred 80 as to be comfortably mounted on the back of the operator. Shoulder straps 22 are individually ad~usted by means known in the art to mount the vacuum cleaner at the proper height for each operator. Similarly, waist strap 24 is ad~ustable 80 as to fit around the waist of any operator.
In use, the operator may easily put on the vacuum cleaner and ad~ust it to fit their body. The operator places his arms through shoulder straps 22 and secures waist strap 24 by inserting male buckle member 26 into female buckle member 28. The shoulder straps and waist straps may then be ad~usted to fit the operator.
Upper casing 14 has a side wall which is substantially cylindrical. The upper ca8ing may be attached to the harness by numerous means. As shown in the _ 7 _ 2~1 469 Figures, two protrusions 30 extend outwardly from a position near the front of cylindrical housing 14. Back plate 20 may be secured to these protrusions by any means known in the art. A8 shown in Figure 2, back plate 20 is secured to protrusions 30 by means of a plurality of screws 32.
The electric cord 34 may be attached to upper casing 14 at any desired point. It has been found advantageous to attach electric cord 34 to one of the protrusions 30. This results in the electrical cord being positioned at a point where it does not interfere with the of the ho~e assembly but where it may be easily grasped by the operator. On/off switch 36 is attached to upper housing 14 by means of control cord 38. By using a control cord, the vacuum cleaner may easily be turned on and of f by the operator while wearing the vacuum cleaner .
Similarly, as with the electric cord, the control cord may be attached to the vacuum cleaner at any desired location.
Once again, it has been found advantageous to locate control cord 38 on one of protrusions 30. If desired, an electrical outlet (not Ehown) may also be provided on protrusion 30. This would be advantageou~ if a VA.-llllmin~
head having an electrically driven motor were to be attached to the vacuum cleaner.
Air exit port 40 is located near the top of upper casing 14. A8 shown in Figure 1, air exit port 40 is positioned and configured to direct air flow away from the operator. The upper portion of upper casing 14 comprises a bevelled surface 42 and a top 44. I~hile air exit port 40 is positioned on bevelled surface 42 in the Figures, by suitably adapting the conf iguration of the air exit port, the air exit port may be positioned at an alternate location on bevelled surface 42 or on top surface 44.
Preferably, air exit port 40 is adapted to receive a hose. By this ~l~f~l-Ation, the vacuum cleaner may be tran~formed into a blower. This expands the potential use of the vacuum cleaner.
- 8 _ 20~ 9 The use of dual cyclones in a vacuum cleaner results in a high level of particulate removal from the entrained air, including relatively small particles.
However, when used in a toxic environment or in a clean 5 room, the particulate emissions from vacuum cleaners must be exceptionally low, for example in the order of 99 . 99~
of 0 . 3 micron particles. To meet this requirement, an after-f ilter may be installed on vacuum cleaner 10 . This may be accomplished by adapting air exit port 40 to 10 receive a filter. Preferably, the filter is positioned F~xt~rn;l 1 to the upper casing . As shown in Figures 3 and 4, the after filter comprises a conical bottom portion 100, a top portion 102 and a filter 104. Bottom portion 100 has a base 106 which is securely attached to air exit port 15 40. Due to the pressure which builds up in the filter, the filter must be securely fixed to port 40. A suitable means of rPl~ hly securing the filter to air exit port 40 is by use of a boyonet mount 108. The exact size and shape of filter 104 will vary d~r~n~lin~ upon the 20 particular emission standards which are set for use in various instances. However, by the use of an after-filter, it is possible to remove over 99 . 99~ of 0 . 3 micron size particles form the dirt laden intake air. As shown in the Figures, filer 104 is in the shape of an annulus. Top 25 portion 102 has a plurality of circumferentially spaced vents 110. In operation, the air enters through base 106 and passes into the centre of filter 104. The air passes through filter 104 and exits through vents 110.
By this modification, an after-filter may easily 30 be added when required. The after-filter is a high efficiency and, preferably, high air flow filter. An example of a suitable f ilter material is HEPA or IrLPA
brand filter media. This material is an expensive synthetic material. By positioning the filter after the 35 dual cyclones, the exhaust air has been substantially cleaned by the time it reaches the f ilter . This greatly increases the filter life. Further, the filter will act to 9 2~4~9 an extent as a muffler to decrease the noise from the motor .
Lower caslng 16 is r~ R~hly mounted on upper casing 14 by any means known in the art which provides a 5 hermetic seal. In the preferred ~o~ , latches 46 are provided ad~acent the lower portion of upper casing 14.
One latch may be positioned on either side of upper casing 14. Each latch 46 ha~ an arm 48 which is pivotably mounted to the upper casing 14. The distal end of each arm 48 has 10 a hook 50. This hook is designed to engage with rim 52 of lower housing 16. When lower casing 16 is mounted on upper casing 14, latches 46, in con~unction with rim 52, result in an air tight seal which avoids any pressure drop in the cyclone c~h ''`rR.
Lower casing 16 has a receiving chamber 54 positioned ad~acent its lower portion 66. Purther, air entry port 56 is positioned adjacent the upper portion of lower casing 16. Air entry port 56 is configured to supply dirt laden air tangentially to the interior surface of 20 lower casing 16. Air entry port 56 is configured to receive hose assembly 18.
Since air entry port 56 is positioned on lower casing 16, the air entry port may be positioned either on the left hand side or the right hand side of the unit 25 simply by rotating lower casing 16 relative to upper cas$ng 14 prior to engaging latches 46. By this ad~ustment, the vacuum cleaner may be used either by a right handed operator or a lef t handed operator .
~he vacuum cleaner has a cyclonic cleaning 30 assembly. Cyclone assembly 60 is mounted on upper casing 16 such that at least the lower part of the as~embly is positioned within the lower casing 16. Preferably, as shown in Figure 3 substantially all of cyclone assembly 60 is positioned within lower casing 16. Cyclone assembly 60 35 may be of any cyclone design which is known in the art of vacuum cleaners and compri~es at least one cyclone.
Preferably, the cyclone assembly comprises a first cyclone lO- 20~469 chamber and a second cyclone chamber in series and, for compactness, it is preferred to have the two cyclones mounted coax~ y as shown in Figure 4. Referring to Figure 4, the f irst cyclone chamber is denoted by reference numeral 62 and the second cyclone chamber is denoted by reference numeral 64. The air enters the vacuum cleaner via air entry port 56. A centrifugal force is applied to the dirt laden air causing the dirt laden air to rotate within first cyclone chamber 62. The larger and heavier dirt is deposited in the lower portion of lower casing 16 (denoted by reference numeral 66). The air exits from the first cyclone chamber via first cyclone air exit 68 to passage 70. The air travels through passage 70 to second air entry port 72. Second air entry port 72 imparts a tangential flow to the air causing the air to circulate in a cyclonic pattern within second cyclone chamber 74.
The finer dirt particles are deposited in receiving chamber 54 and the cleaned air is evacuated from the second cyclone chamber through second cyclone air exit 74.
Notor 80 is positioned within upper casing 14 above the cyclone chambers. Motor 80 may be mounted to upper casing 14 by any means known in the art which dampens vibrations from the motor. As shown in Figure 4, a plate 82, which is part of the upper casing, is positioned on top of the cyclone chambers. The plate seals the cyclone ~h ` ~ to prevent any pressure drop. Second cyclone air exit 74 is positioned at the centre of plate 82. Rubber gasket 84 is positioned above plate 82. Motor 80 is then positioned on top of rubber gasket 84. The gasket prevents air leakage between the motor and cyclone air exit 74 and provides shock absorbing so as to dampen vibration from the motor. Cap 86 is placed on top of the motor and the entire assembly is secured into place by means of z-shaped clamp 88. Clamp 88 is secured to upper casing 14 by means of lower screw posts 90 and upper screw posts 92.
This conf iguration provides several advantages .
.
11- 2~469 Flrst, by locating the motor at the top of the vacuum cleaner, the el~, iC5 are subgtantially i uv~d. It has surprisingly been found that the use of this configuration provides a vacuum cleaner which feels very light weight 5 and comfortable to the operator. This is achieved in part by mounting the motor at the top contrary to what has been utilized in previous designs. With the bulk of the mass of the vacuum cleaner (the motor) at the top, the unit is more securely held to the operator 8 back and tends to lO swing less and have less free motion than if the motor were at the bottom. This design results in the motor being substantially closer to the operator 8 ears than those utilized in previous designs. Despite this clo~c~n~P~ it has also surprisingly been fûund that the design is 15 relatively quiet and may be used for extended periods of time without the need to apply expensive sound absorbing insulation to the upper casing. The sound level can be further reduced, as mentioned, by using a filter at air exit 40. Further, by positioning motor 80 directly above 20 second cyclone air exit 74, the clean air may be used to cool the motor.
Claims (20)
1. A cyclonic vacuum cleaner comprising:
(a) a back pack harness;
(b) an upper casing attached to said harness;
(c) a lower casing releasably mounted on said upper casing;
(d) at least one cyclone having a lower part and an air exit port, said cyclone being mounted with at least said lower part positioned within said lower casing;
(e) a motor and fan means positioned within said upper casing above said at least one cyclone;
(f) an air entry means providing an air flow path from outside said vacuum cleaner to said at least one cyclone; and, (g) air exit means providing an air flow path from said at least one cyclone to outside said vacuum cleaner wherein said motor drives said fan means and said fan means causes air to flow from said air entry means to said air exit means.
(a) a back pack harness;
(b) an upper casing attached to said harness;
(c) a lower casing releasably mounted on said upper casing;
(d) at least one cyclone having a lower part and an air exit port, said cyclone being mounted with at least said lower part positioned within said lower casing;
(e) a motor and fan means positioned within said upper casing above said at least one cyclone;
(f) an air entry means providing an air flow path from outside said vacuum cleaner to said at least one cyclone; and, (g) air exit means providing an air flow path from said at least one cyclone to outside said vacuum cleaner wherein said motor drives said fan means and said fan means causes air to flow from said air entry means to said air exit means.
2. A cyclonic vacuum cleaner as claimed in claim 1 wherein said air entry means comprises an entry port for supplying dirt laden air tangentially to said at least one cyclone to produce cyclonic rotation of said air within said at least one cyclone, said port being located near the top of said at least one cyclone and adapted to receive a hose assembly.
3. A cyclonic vacuum cleaner as claimed in claim 2 wherein the top of said lower casing is located near the top of said at least one cyclone and said port is provided in said lower casing.
4. A cyclonic vacuum cleaner as claimed in claim 3 wherein said lower casing is substantially circular in cross section and comprises the outer wall of the first of said at least one cyclone such that the lower casing may be mounted onto said upper casing with said port positioned to the right or the left of said harness for use by a right or a left handed user.
5. A cyclonic vacuum cleaner as claimed in claim 1, wherein said motor is positioned in the air flow path from said at least one cyclone to outside said vacuum cleaner.
6. A cyclonic vacuum cleaner as claimed in claim 5, wherein said motor is positioned above the air exit port from said at least one cyclone, and said air exit means comprises an exit port on the upper portion of said upper casing.
7. A cyclonic vacuum cleaner as claimed in claim 6, wherein the air from the air exit port from said at least one cyclone cools said motor prior to passing through said exit port.
8. A cyclonic vacuum cleaner as claimed in claim 7, wherein said exit port of said upper casing is positioned and configured to direct air flow away from the operator.
9. A cyclonic vacuum cleaner as claimed in claim 6, wherein said exit port of said upper casing is adapted to receive a hose so that said vacuum cleaner may also be used as a blower.
10. A cyclonic vacuum cleaner as claimed in claim 6, wherein said exit port of said upper casing is adapted to receive a filter.
11. A cyclonic vacuum cleaner as claimed in claim 6, and including a filter positioned external to said upper casing over said exit port of said upper casing.
12. A cyclonic vacuum cleaner as claimed in claim 1 wherein said at least one cyclone comprises a first cyclone and a second cyclone in series.
13. A cyclonic vacuum cleaner as claimed in claim 12 wherein said first cyclone and said second cyclone are mounted coaxially in said vacuum cleaner.
14. A cyclonic vacuum cleaner as claimed in claim 13, wherein said air exit port is the exit from said second cyclone and said motor is positioned in the air flow path from the exit of said second cyclone to outside said vacuum cleaner.
15. A cyclonic vacuum cleaner as claimed in claim 1 wherein said back pack harness comprises a back plate having a lower portion, two shoulder straps each of which has first and second ends and a waist strap attached to said lower portion of said back plate, said first end of each of said shoulder straps being attached to said back plate and said second end of each of said shoulder straps each being attached to said waist strap.
16. A cyclonic vacuum cleaner comprises:
(a) a back pack harness;
(b) an upper casmg attached to said harness;
(c) a lower casing releasably mounted on said upper casing;
(d) first and second coaxially positioned cyclones having a lower part, said second cyclone being mounted within said first cyclone, said second cyclone having a cyclone exit port, said cyclones being mounted with at least said lower part positioned within said lower casing, said coaxial cyclones mounted so that dirt laden air will enter the first outer cyclone and then the second inner cyclone before exiting throughout said cyclone exit port;
(e) a motor and a fan means positioned within said upper casing above said cyclones;
(f) an air entry port positioned on said lower casing for supplying dirt laden air tangentially to said outer cyclone to produce cyclonic rotation of said air within said outer cyclone, said port being located near the top of said outer cyclone and adapted to receive a hose assembly, and, (g) an air exit port provided on said upper casing wherein said motor drives said fan means and said fan means causes air to flow from said air entry port to said air exit port.
(a) a back pack harness;
(b) an upper casmg attached to said harness;
(c) a lower casing releasably mounted on said upper casing;
(d) first and second coaxially positioned cyclones having a lower part, said second cyclone being mounted within said first cyclone, said second cyclone having a cyclone exit port, said cyclones being mounted with at least said lower part positioned within said lower casing, said coaxial cyclones mounted so that dirt laden air will enter the first outer cyclone and then the second inner cyclone before exiting throughout said cyclone exit port;
(e) a motor and a fan means positioned within said upper casing above said cyclones;
(f) an air entry port positioned on said lower casing for supplying dirt laden air tangentially to said outer cyclone to produce cyclonic rotation of said air within said outer cyclone, said port being located near the top of said outer cyclone and adapted to receive a hose assembly, and, (g) an air exit port provided on said upper casing wherein said motor drives said fan means and said fan means causes air to flow from said air entry port to said air exit port.
17. A cyclonic vacuum cleaner as claimed in claim 16 wherein said lower casing is substantially circular in cross section and comprises the outer wall of said first cyclone such that the lower casing may be mounted onto said upper casing with said port positioned to the right or the left of said harness for use by a right or a left handed user.
18. A cyclonic vacuum cleaner as claimed in claim 17 wherein said motor is positioned between the cyclone exit port and said air exit port so that the air from the exit from the second cyclone cools said motor before passing through said air exit port.
19. A cyclonic vacuum cleaner as claimed in claim 18, and including a filter positioned external to said upper casing over said exit port of said casing.
20. A cyclonic vacuum cleaner as claimed in claim 18 wherein said back pack harness comprises a back plate having a lower portion, two shoulder straps each of which has first and second ends and a waist strap attached to said lower portion of said back plate, said first end of each of said shoulder straps being attached to said back plate and said second end of each of said shoulder straps each being attached to said waist strap.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2061469 CA2061469C (en) | 1992-02-19 | 1992-02-19 | Cyclonic back-pack vacuum cleaner |
| AU33071/93A AU3307193A (en) | 1992-02-19 | 1993-02-16 | Cyclonic back-pack vacuum cleaner |
| EP93301200A EP0557096A1 (en) | 1992-02-19 | 1993-02-18 | Cyclonic back-pack vacuum cleaner |
| US08/019,485 US5267371A (en) | 1992-02-19 | 1993-02-19 | Cyclonic back-pack vacuum cleaner |
| JP3021193A JPH0654778A (en) | 1992-02-19 | 1993-02-19 | Shoulder-held cyclone type vacuum cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2061469 CA2061469C (en) | 1992-02-19 | 1992-02-19 | Cyclonic back-pack vacuum cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2061469A1 CA2061469A1 (en) | 1993-08-20 |
| CA2061469C true CA2061469C (en) | 1996-11-19 |
Family
ID=4149291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2061469 Expired - Fee Related CA2061469C (en) | 1992-02-19 | 1992-02-19 | Cyclonic back-pack vacuum cleaner |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0557096A1 (en) |
| JP (1) | JPH0654778A (en) |
| AU (1) | AU3307193A (en) |
| CA (1) | CA2061469C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269518B1 (en) | 1999-12-08 | 2001-08-07 | Shell Electric Mfg. (Holdings) Co. Ltd. | Bagless vacuum cleaner |
| US6484350B2 (en) | 1999-12-08 | 2002-11-26 | Shell Electric Mfg. (Holdings) Co. Ltd. | Bagless canister vacuum cleaner |
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| US5287591A (en) * | 1992-03-30 | 1994-02-22 | Racine Industries, Inc. | Carpet cleaning machine with convertible-use feature |
| AU674794B2 (en) * | 1993-11-15 | 1997-01-09 | Alfred Jawad | Convertible backpack device |
| GB2296452A (en) * | 1994-12-28 | 1996-07-03 | Notetry Ltd | Shroud for cyclone separator |
| DE69611093T2 (en) | 1996-10-21 | 2001-05-23 | Candy Spa | Household vacuum cleaners |
| GB9726659D0 (en) * | 1997-12-17 | 1998-02-18 | Notetry Ltd | Cyclonic separating apparatus |
| US6735817B2 (en) | 1998-01-09 | 2004-05-18 | Royal Appliance Mfg. Co. | Upright vacuum cleaner with cyclonic air flow |
| US6070291A (en) * | 1998-01-09 | 2000-06-06 | Royal Appliance Mfg. Co. | Upright vacuum cleaner with cyclonic air flow |
| EP1056385A1 (en) * | 1998-01-23 | 2000-12-06 | Interface, Inc. | Combination carpet cleaning brush unit,vacuum and pile lifter |
| GB2344778A (en) * | 1998-12-18 | 2000-06-21 | Notetry Ltd | Cyclonic separator and fan combination |
| GB2344745B (en) * | 1998-12-18 | 2002-06-05 | Notetry Ltd | Vacuum cleaner |
| KR100585497B1 (en) * | 1999-09-14 | 2006-06-02 | 삼성광주전자 주식회사 | Vacuum cleaner |
| US6341404B1 (en) | 2000-01-13 | 2002-01-29 | Royal Appliance Mfg. Co. | Upright vacuum cleaner with cyclonic airflow pathway |
| EP1361814B2 (en) | 2001-02-24 | 2007-10-10 | Dyson Technology Limited | A collecting chamber for a vacuum cleaner |
| JP3674039B2 (en) | 2002-04-25 | 2005-07-20 | ツインバード工業株式会社 | Cyclone vacuum cleaner |
| SE0300849D0 (en) * | 2003-03-25 | 2003-03-25 | Electrolux Ab | Harness for a blower |
| EP1466550A1 (en) * | 2003-04-10 | 2004-10-13 | Pro-Team, Inc. | Modular vacuum cleaning system |
| US8978197B2 (en) | 2009-03-13 | 2015-03-17 | Lg Electronics Inc. | Vacuum cleaner |
| US7882592B2 (en) | 2005-12-10 | 2011-02-08 | Lg Electronics Inc. | Vacuum cleaner |
| US7770253B2 (en) | 2005-12-10 | 2010-08-10 | Lg Electronics Inc. | Vacuum cleaner with removable dust collector, and methods of operating the same |
| US7749295B2 (en) | 2005-12-10 | 2010-07-06 | Lg Electronics Inc. | Vacuum cleaner with removable dust collector, and methods of operating the same |
| US7785396B2 (en) | 2005-12-10 | 2010-08-31 | Lg Electronics Inc. | Vacuum cleaner with removable dust collector, and methods of operating the same |
| EP1949842B1 (en) | 2007-01-24 | 2015-03-04 | LG Electronics Inc. | Vacuum cleaner |
| JP5210758B2 (en) * | 2008-08-08 | 2013-06-12 | 株式会社東芝 | Electric vacuum cleaner |
| US8881343B2 (en) | 2009-02-12 | 2014-11-11 | Lg Electronics Inc. | Vacuum cleaner |
| CN101744565B (en) * | 2010-01-08 | 2011-08-17 | 周丽君 | Knapsack type dust collector |
| CN105747989B (en) * | 2015-01-06 | 2020-06-26 | 创科实业有限公司 | Axial flow fan dust collector |
| AU2016383836B2 (en) | 2016-01-08 | 2019-02-21 | Mitsubishi Electric Corporation | Electric vacuum cleaner |
| KR102560970B1 (en) * | 2016-03-31 | 2023-07-31 | 엘지전자 주식회사 | Cleaner |
| US10646082B2 (en) | 2016-03-31 | 2020-05-12 | Lg Electronics Inc. | Cleaner |
| TWI760214B (en) | 2016-03-31 | 2022-04-01 | 南韓商Ｌｇ電子股份有限公司 | Cleaner |
| WO2017171495A1 (en) | 2016-03-31 | 2017-10-05 | 엘지전자 주식회사 | Cleaning apparatus |
| DK4104734T3 (en) * | 2016-03-31 | 2023-06-19 | Lg Electronics Inc | Cleaning equipment |
| US11166607B2 (en) | 2016-03-31 | 2021-11-09 | Lg Electronics Inc. | Cleaner |
| KR102558087B1 (en) * | 2016-08-25 | 2023-07-24 | 엘지전자 주식회사 | Cleaner |
| KR102123680B1 (en) * | 2018-06-28 | 2020-06-17 | 엘지전자 주식회사 | Cleaner |
| KR102022096B1 (en) * | 2018-06-28 | 2019-09-18 | 엘지전자 주식회사 | Cleaner |
| KR102123682B1 (en) * | 2018-06-28 | 2020-06-17 | 엘지전자 주식회사 | Cleaner |
| KR102022098B1 (en) * | 2018-06-28 | 2019-09-18 | 엘지전자 주식회사 | Cleaner |
| EP3721776A1 (en) * | 2019-04-09 | 2020-10-14 | Hilti Aktiengesellschaft | Wet suction device and arrangement of components in such a wet suction device |
| KR102265663B1 (en) * | 2019-10-08 | 2021-06-16 | 주석영 | Backpack type vacuum cleaner |
| KR102180674B1 (en) * | 2019-11-07 | 2020-11-20 | 엘지전자 주식회사 | Cleaner |
| KR102180672B1 (en) * | 2019-11-07 | 2020-11-20 | 엘지전자 주식회사 | Cleaner |
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| DE8904591U1 (en) * | 1989-04-12 | 1989-07-06 | Muthmann, Dieter, 3006 Burgwedel, De | |
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-
1992
- 1992-02-19 CA CA 2061469 patent/CA2061469C/en not_active Expired - Fee Related
-
1993
- 1993-02-16 AU AU33071/93A patent/AU3307193A/en not_active Abandoned
- 1993-02-18 EP EP93301200A patent/EP0557096A1/en not_active Withdrawn
- 1993-02-19 JP JP3021193A patent/JPH0654778A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269518B1 (en) | 1999-12-08 | 2001-08-07 | Shell Electric Mfg. (Holdings) Co. Ltd. | Bagless vacuum cleaner |
| US6484350B2 (en) | 1999-12-08 | 2002-11-26 | Shell Electric Mfg. (Holdings) Co. Ltd. | Bagless canister vacuum cleaner |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0557096A1 (en) | 1993-08-25 |
| JPH0654778A (en) | 1994-03-01 |
| AU3307193A (en) | 1993-08-26 |
| CA2061469A1 (en) | 1993-08-20 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKLA | Lapsed |