US20040134022A1 - Bagless stick type vacuum cleaner - Google Patents
Bagless stick type vacuum cleaner Download PDFInfo
- Publication number
- US20040134022A1 US20040134022A1 US10/339,829 US33982903A US2004134022A1 US 20040134022 A1 US20040134022 A1 US 20040134022A1 US 33982903 A US33982903 A US 33982903A US 2004134022 A1 US2004134022 A1 US 2004134022A1
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- US
- United States
- Prior art keywords
- vacuum cleaner
- housing
- dust cup
- dirt
- filter
- 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
Links
- 239000000428 dust Substances 0.000 claims abstract description 123
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000000356 contaminant Substances 0.000 claims description 3
- 239000011236 particulate material Substances 0.000 claims description 2
- 239000012815 thermoplastic material Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- -1 dirt Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/165—Construction of inlets
-
- 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
- A47L9/1658—Construction of outlets
- A47L9/1666—Construction of outlets with filtering means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/03—Vacuum cleaner
Definitions
- the present invention relates to vacuum cleaners. More particularly, the present invention relates to stick type vacuum cleaners that employ a dust cup.
- Upright vacuum cleaners are very well known in the art.
- One type of upright vacuum cleaner which has become common in the marketplace is a stick type vacuum cleaner in which a dust cup is employed for holding dirt and dust separated from an airstream.
- a nozzle base travels across a bare floor, carpet or other surface being cleaned.
- Pivotally mounted to a nozzle base is an upright housing portion. Often this is formed as a rigid plastic housing having a socket for accommodating the dust cup.
- a suction source such as a motor and fan assembly is mounted to either the nozzle base or the upright housing of the vacuum cleaner.
- One known type of stick type vacuum cleaner employing a dust cup with cyclonic airflow utilizes an inverted truncated cone positioned within the dust cup.
- a baffle extends outwardly from an outer surface of the cone. The baffle cooperates with the cone for directing a stream of dirt laden air in a cyclonic manner about the outer surface wall of the cone.
- a filter is positioned outside the dust cup and mounted thereto.
- This design is disadvantageous from the standpoint that two different elements are needed to provide the cyclonic airflow and to filter the dirt from the airstream. It would be beneficial to have a design wherein the filter element can be positioned in the dust cup rather than being forced out of the dust cup due to the presence of a structure for generating a cyclonic airflow within the dust cup.
- an upright vacuum cleaner comprises a nozzle base including a main suction opening formed on an underside thereof.
- An upright housing is hingedly connected to the nozzle base.
- the housing includes a dirt separation chamber and a dirt receptacle for receiving dirt and dust separated by the dirt separation chamber.
- a conduit connects the nozzle base to the housing.
- a suction source is located in one of the housing and the nozzle base and is in fluid communication with the dirt separation chamber.
- a generally conically shaped filter extends into the dirt separation chamber along a longitudinal axis of the dirt separation chamber.
- a vacuum cleaner comprising a nozzle base and a housing pivotally mounted on the nozzle base.
- the housing defines a cyclonic airflow chamber for separating contaminants from a suction airstream.
- the housing further comprises an inlet for the cyclonic airflow chamber and an outlet for the cyclonic airflow chamber.
- a dirt container is selectively mounted in the housing and defines at least a portion of the cyclonic airflow chamber for receiving and retaining dirt and dust separated from the suction airstream in the cyclonic airflow chamber.
- An airstream suction source is mounted to one of the housing and the nozzle base.
- the suction source is in fluid communication with the cyclonic airflow chamber and has an inlet disposed downstream from the cyclonic airflow chamber outlet.
- a filter assembly is selectively mounted to the dirt container and extends into the dirt container.
- the filter assembly includes a longitudinal axis and a support member including a handle. The longitudinal axis passes through the handle.
- a vacuum cleaner comprises a first housing member comprising a cyclonic airflow chamber adapted for separating entrained dirt and dust from the circulating airstream.
- a dust cup is releasably mounted to the first housing member.
- the dust cup which includes an open first end and a closed second end, holds dirt and dust separated from the cyclonic airflow chamber.
- a second housing member defines a main suction opening.
- a first conduit fluidly connects the main suction opening of the second housing member to an inlet of the cyclonic airflow chamber.
- a generally conically shaped filter assembly is selectively mounted to the dust cup. It extends along a longitudinal axis of the dust cup.
- An airstream source is mounted to the first housing member and is positioned above the cyclonic airflow chamber. The airstream source is adapted for generating and maintaining an airstream flowing through the cyclonic airflow chamber.
- a vacuum cleaner comprises a nozzle section and a housing section connected to the nozzle section and in fluid communication with the nozzle section.
- a dust cup is selectively mounted to the housing section. The dust cup holds dirt and dust separated from a suction airstream flowing into the housing section.
- a suction source is in fluid communication with the dust cup.
- a cyclonic airflow chamber is defined at least partially in the dust cup for separating particulate material entrained in an airstream flowing from the nozzle section towards the suction source.
- a tapered filter assembly extends into the dust cup for further separating dirt and dust from the suction airstream.
- a vacuum cleaner comprises a housing in communication with a suction opening and including a socket.
- a dust cup is removably mounted in the housing socket.
- the dust cup comprises an open first end, a closed second end and a side wall.
- a filter is selectively mounted to the dust cup first end and extends into the dust cup.
- a particle separation chamber is defined in the dust cup between an interior wall of the dust cup and the filter for separating particles from an airstream flowing from the suction opening through an inlet located in the dust cup side wall.
- a suction source is in fluid communication with the dust cup first end. The suction source is located in the housing for generating and maintaining a suction airstream from the suction opening through the filter.
- FIG. 1 is a front elevational view of a vacuum cleaner according to the present invention
- FIG. 2 is a side elevational view thereof
- FIG. 3 is an enlarged exploded perspective view of a lower portion of the vacuum cleaner of FIG. 1;
- FIG. 4 is a rear perspective view of a dust cup of the vacuum cleaner of FIG. 3;
- FIG. 5 is an exploded perspective view of the dust cup of FIG. 3 from above;
- FIG. 6 is a top plan view of the dust cup of FIG. 5;
- FIG. 7 is an exploded perspective view of the dust cup of FIG. 3 from below;
- FIG. 8 is a cross sectional view of the vacuum cleaner of FIG. 2 with an upright housing thereof tilted back for use;
- FIG. 9 is a cross sectional view through the vacuum cleaner of FIG. 2 along lines 9 - 9 ;
- FIG. 10 is a bottom plan view of the vacuum cleaner of FIG. 1;
- FIG. 11 is a schematic view of a filter according to another embodiment of the present invention.
- FIG. 12 is a schematic view of a filter according to a third embodiment of the present invention.
- FIG. 1 illustrates a stick vac A including a nozzle base 10 having on an underside thereof a suction opening 12 .
- rollers 14 located immediately behind the suction opening, and rear wheels 16 .
- a housing 20 supported on the nozzle base 10 is a housing 20 .
- a socket 22 (FIG. 3) for selectively accommodating a dust cup 24 .
- Extending from an upper end of the housing 20 is a handle 26 .
- a hand grip 30 Positioned on a distal end of the handle is a hand grip 30 which supports a ring 32 .
- the ring can be used to, for example, hang the stick vac from a suitable peg or hook mounted on a wall or in a closet or the like since the stick vac is a relatively light weight appliance.
- first cord hook 34 also provided on the hand grip is a first cord hook 34 .
- second cord hook 36 located on the housing 20 in order to allow a conventional electrical cord (not illustrated) to be wrapped around the cord hooks when the appliance is not in use.
- the nozzle base 10 includes a hollow interior 40 which allows air to flow from the suction opening 12 towards a first conduit 42 .
- the first conduit includes a pivot area 44 at a first end 46 thereof.
- the first conduit extends out of the nozzle base 10 and terminates at a second end 48 .
- the first conduit second end 48 is received in a second conduit 50 extending from the housing 20 .
- the second conduit 50 has a first end 52 which slips over the fist conduit second end 48 .
- the two conduits are secured together by conventional means.
- the second conduit extends along a portion of the housing 20 and terminates at a curved second end 54 which, as is best illustrated in FIG. 3, leads to an opening 56 .
- the opening 56 is located on an interior wall 60 of the housing 20 and is surrounded by an elastomeric gasket 62 . As best seen in FIG. 9, a tangential, swirling, flow path 64 is thus provided for air entrained dirt which flows from the suction opening 12 through the first and second conduits 42 and 50 and out the opening 56 .
- An upper section 70 of the housing accommodates a motor/fan assembly 72 .
- an on/off switch 80 is located on the housing upper section 70 .
- Also defined on the housing upper section is a catch 84 as best illustrated in FIG. 3.
- the dust cup 24 includes an open first end 92 and a closed second end 94 as well as a side wall 96 extending between the two ends and an interior wall 97 .
- An opening 98 is defined in the side wall 96 .
- Extending from the second end 94 of the dust cup is a stub 100 .
- the stub 100 protrudes into a pocket 101 defined in the housing 20 in order to allow the dust cup 24 to be pivotally mounted on the housing.
- the stub 100 and pocket 101 define a hinge assembly for the dust cup on the housing.
- a handle 102 is defined on the side wall 96 of the dust cup adjacent the first end 92 thereof.
- the handle accommodates a moveable, resilient, latch 104 having a finger grip 106 .
- the latch releases from the catch section 84 on the housing thereby enabling the dust cup upper end to be pulled away from the housing.
- the dust cup pivots on the housing via a cooperation of the stub 100 in pocket 101 to provide a hinge function.
- the filter assembly includes a first end 112 which is defined by a frame 114 .
- the frame has a top wall 116 (FIG. 5) with a rim 117 and an outer skirt 118 depending therefrom. Spaced from the outer skirt is an inner skirt 119 .
- a handle 120 which is in the form of a bridge extending between a pair of apertures 122 and 124 in the top wall. Reenforcing the top wall are a plurality of spaced ribs 126 which extend from the outer skirt 118 to the rim 117 .
- a channel 127 is defined between the inner and outer skirts 119 , 118 .
- the filter assembly 110 also has a second end 128 which is defined by an end cap 130 having a bottom wall 131 . With reference again to FIG. 5, extending from the bottom wall is an inner rim 132 and a skirt 134 defining an annular channel 136 therebetween.
- a filter 140 extends between the frame 114 and the end cap 130 .
- the filter can be made of a planar filter medium which can be pleated as at 142 .
- the filter has a first end 144 which is secured in the channel 127 of the frame 114 and a second end 146 which is secured in the channel 136 defined in the end cap 130 , as may best be seen in FIG. 8.
- the filter assembly 110 is frustoconical or tapered in its construction. Moreover, the filter material or medium 140 is also tapered in its shape as can be best seen in FIGS. 5 and 7. It is believed that the conical shape of the filter improves filtering efficiency, as compared with a right cylindrical shaped filter. This may be due, at least in part, to the increased efficiency of cyclonic airflow around the filter that is provided in the dust cup by the cooperation of the dust cup inner wall 97 and the filter. As is evident from FIG. 8, an approximately constant distance is defined between the filter and the inner wall of the dust cup so as to enhance the cyclonic flow of air around the filter and, hence, dirt separation.
- the conical filter shape also allows for an easier emptying of the dust cup 24 and may reduce the rate at which the filter 140 becomes clogged.
- the end cap 130 is secured to the filter element 140 .
- the frame 114 is secured to the filter element 140 .
- the frame 114 includes the pair of apertures 122 and 124 which communicate with an interior 148 of the filter. With this construction, air must enter through the wall of the filter material 140 into the interior space 148 . In other words, the frame 114 and the bottom wall 130 prevent airflow from entering the interior 148 of the filter without passing through the filter medium 140 .
- the generally conically shaped filter assembly 110 is mounted in the dust cup 24 such that the frame 114 selectively engages the interior wall 99 of the dust cup via an interference fit between the rim 117 of the top wall and the dust cup interior wall 97 .
- the filter assembly 110 is releasably, yet securely, retained in its operative position, even when the dust cup 24 is removed from the vacuum cleaner A.
- the filter assembly 110 can be removed from the dust cup 24 simply by grasping the handle 120 and pulling upward. Thereafter, the dust cup can be inverted so as to remove the dirt and dust contained therein. Subsequently, the dust cup can be righted again, the filter assembly can be reinstalled and the dust cup returned to the housing 20 .
- the filter material or medium can be made from a suitable conventional planar thermoplastic material if so desired, so that the filter can be washed.
- the filter medium can be made from a suitable paper material.
- the frame 114 and end cap 130 can be made from a suitable conventional thermoplastic material.
- the filter 140 can be secured to the frame 114 and end cap 130 by conventional means, such as adhesive, sonic welding or the like.
- air entrained dirt and dust enter the vacuum cleaner via suction opening 12 .
- the air stream flows through the hollow interior 40 of the nozzle base 10 and into the first end 46 of the first conduit 42 .
- the air then flows through the first conduit and into the second conduit 50 .
- Air flows out of the second conduit at its curved second end 54 .
- the air is directed into a cyclonic swirling flow in the dust cup 24 via the curved second end 54 of the second conduit.
- the air impinges upon the filter assembly 110 and swirls around it.
- a cyclonic airflow chamber 150 is defined in the dust cup between the filter assembly 110 and the interior wall 97 of the dust cup. Particles in the air stream, such as dirt, dust and the like are removed or separated from the suction airstream in the cyclonic airflow chamber. More specifically, the location and orientation of the inlet opening 56 and the generally cylindrical configuration of the cyclonic airflow chamber 150 causes the suction airstream to follow a swirling or cyclonic path within the chamber, as best shown in FIG. 9. Dirt and dust are flung outwardly by centrifugal force toward the interior wall 97 of the dust cup 90 . The removed particulate matter such as dirt, dust and the like then falls, via gravity, toward the bottom of the dust cup 24 . It is retained therein until the dust cup is emptied.
- Air flows radially inward toward an axis 152 of the dust cup and then upward around the bottom cap 130 and then radially inward through the filter medium 140 into the interior space 148 thereof. Air then flows upward again through the apertures 122 and 124 around the handle 120 and into the fan 74 . The suction airstream then flows into the fan 74 and out of the housing 20 via the exhaust vents 78 .
- a clean air-type vacuum cleaner is here disclosed.
- the conical or tapered shape of the filter assembly 110 enhances the removal effect of the cyclonic airflow path. Residual particulate matter, i.e., that which is not removed from the suction airstream as a result of the cyclonic action, normally lighter, smaller particles, are filtered by the filter element or medium 140 as the airflow path passes therethrough.
- the filter assembly 110 extends along the axis 152 of the dust cup such that the filter assembly is centrally positioned in the dust cup. Also, the axis 152 passes through the handle 120 , as may be evident from FIG. 8. Thus, the filter assembly 110 is concentrically disposed in the dust cup 24 .
- the location and orientation of the opening 56 in the housing and the opening 98 in the dust cup will effect the direction of cyclonic airflow.
- the openings could be located and arranged differently.
- the direction of cyclonic airflow could be reversed.
- the cyclonic airflow direction could be clockwise or counter clockwise depending upon the location and arrangement of the aligned openings 56 and 98 .
- the location of the dust cup side wall opening 98 could be changed if desired. All such orientations and arrangements are considered within the scope of the present invention.
- cyclonic as used herein is not meant to be limited to a particular direction of airflow rotation. Rather, the cyclonic action discussed in the present invention is merely intended to separate a substantial portion of the entrained dirt and dust from the suction airstream and cause such dirt and dust to be deposited in the dust cup 24 .
- the suction airstream then passes through the filter element or medium 140 , so that residual contaminants are removed, and exits the cyclonic airflow chamber, as well as the dust cup, through the two openings 122 and 124 in the frame 114 .
- FIG. 11 illustrates a filter assembly 160 having a first end 162 which is provided with a frame 164 . Extending away from the frame is a skirt 168 . The skirt has a lower end 170 .
- a filter medium 180 includes an upper end 182 which is in contact with and secured to the skirt lower end 170 along a securement line 184 .
- the filter medium also has a lower end 186 which is covered by a bottom cap 188 .
- FIG. 11 illustrates a design in which the filter is protected from the incoming airstream, a disadvantage of the design illustrated in FIG. 11 is that the filter itself is somewhat shorter, hence, affording less filtration area.
- a filter assembly 200 includes a first end 202 having a frame 204 . Extending from the frame is a skirt 208 . The skirt has a lower end 210 . A filter medium 220 extends away from the frame 204 . The filter medium has an upper end 222 which is secured via a securement line 224 to an inside periphery of the skirt. The filter medium also has a lower end 226 which is covered by a bottom cap 228 .
- the airflow depicted by arrow 230 , contacts the skirt 208 , but yet the length of the filter medium 220 is not shortened. This is accomplished by extending the filter medium upwardly into the skirt until the upper end 222 of the filter is fastened to the skirt via the securement line 224 .
Abstract
Description
- The present invention relates to vacuum cleaners. More particularly, the present invention relates to stick type vacuum cleaners that employ a dust cup.
- Upright vacuum cleaners are very well known in the art. One type of upright vacuum cleaner which has become common in the marketplace is a stick type vacuum cleaner in which a dust cup is employed for holding dirt and dust separated from an airstream. In most stick type vacuum cleaners, a nozzle base travels across a bare floor, carpet or other surface being cleaned. Pivotally mounted to a nozzle base is an upright housing portion. Often this is formed as a rigid plastic housing having a socket for accommodating the dust cup. As is well known, a suction source such as a motor and fan assembly is mounted to either the nozzle base or the upright housing of the vacuum cleaner.
- It is now also known in the art of vacuum cleaners to use cyclonic action to separate particles from a stream of dirt laden air. To this end, the dirt laden air is directed tangentially into the dust cup and flows in a swirling motion in the dust cup. Dirt particles are flung outwardly toward the side wall of the dust cup while air is withdrawn along a longitudinal axis of the dust cup.
- One known type of stick type vacuum cleaner employing a dust cup with cyclonic airflow utilizes an inverted truncated cone positioned within the dust cup. A baffle extends outwardly from an outer surface of the cone. The baffle cooperates with the cone for directing a stream of dirt laden air in a cyclonic manner about the outer surface wall of the cone. In order to remove dust from the dust laden airstream, a filter is positioned outside the dust cup and mounted thereto. This design is disadvantageous from the standpoint that two different elements are needed to provide the cyclonic airflow and to filter the dirt from the airstream. It would be beneficial to have a design wherein the filter element can be positioned in the dust cup rather than being forced out of the dust cup due to the presence of a structure for generating a cyclonic airflow within the dust cup.
- Accordingly, it has been deemed desirable to develop a new and improved stick type vacuum cleaner which would overcome the foregoing difficulties and others while providing better and more advantageous overall results.
- In accordance with one aspect of the present invention, an upright vacuum cleaner is provided. More particularly, in accordance with this aspect of the invention, the vacuum cleaner comprises a nozzle base including a main suction opening formed on an underside thereof. An upright housing is hingedly connected to the nozzle base. The housing includes a dirt separation chamber and a dirt receptacle for receiving dirt and dust separated by the dirt separation chamber. A conduit connects the nozzle base to the housing. A suction source is located in one of the housing and the nozzle base and is in fluid communication with the dirt separation chamber. A generally conically shaped filter extends into the dirt separation chamber along a longitudinal axis of the dirt separation chamber.
- According to another aspect of the present invention, a vacuum cleaner is provided. In connection with this aspect of the invention, the vacuum cleaner comprises a nozzle base and a housing pivotally mounted on the nozzle base. The housing defines a cyclonic airflow chamber for separating contaminants from a suction airstream. The housing further comprises an inlet for the cyclonic airflow chamber and an outlet for the cyclonic airflow chamber. A dirt container is selectively mounted in the housing and defines at least a portion of the cyclonic airflow chamber for receiving and retaining dirt and dust separated from the suction airstream in the cyclonic airflow chamber. An airstream suction source is mounted to one of the housing and the nozzle base. The suction source is in fluid communication with the cyclonic airflow chamber and has an inlet disposed downstream from the cyclonic airflow chamber outlet. A filter assembly is selectively mounted to the dirt container and extends into the dirt container. The filter assembly includes a longitudinal axis and a support member including a handle. The longitudinal axis passes through the handle.
- According to still another aspect of the present invention, a vacuum cleaner comprises a first housing member comprising a cyclonic airflow chamber adapted for separating entrained dirt and dust from the circulating airstream. A dust cup is releasably mounted to the first housing member. The dust cup, which includes an open first end and a closed second end, holds dirt and dust separated from the cyclonic airflow chamber. A second housing member defines a main suction opening. A first conduit fluidly connects the main suction opening of the second housing member to an inlet of the cyclonic airflow chamber. A generally conically shaped filter assembly is selectively mounted to the dust cup. It extends along a longitudinal axis of the dust cup. An airstream source is mounted to the first housing member and is positioned above the cyclonic airflow chamber. The airstream source is adapted for generating and maintaining an airstream flowing through the cyclonic airflow chamber.
- In accordance with a further aspect of the present invention, a vacuum cleaner comprises a nozzle section and a housing section connected to the nozzle section and in fluid communication with the nozzle section. A dust cup is selectively mounted to the housing section. The dust cup holds dirt and dust separated from a suction airstream flowing into the housing section. A suction source is in fluid communication with the dust cup. A cyclonic airflow chamber is defined at least partially in the dust cup for separating particulate material entrained in an airstream flowing from the nozzle section towards the suction source. A tapered filter assembly extends into the dust cup for further separating dirt and dust from the suction airstream.
- In accordance with yet another aspect of the present invention, a vacuum cleaner comprises a housing in communication with a suction opening and including a socket. A dust cup is removably mounted in the housing socket. The dust cup comprises an open first end, a closed second end and a side wall. A filter is selectively mounted to the dust cup first end and extends into the dust cup. A particle separation chamber is defined in the dust cup between an interior wall of the dust cup and the filter for separating particles from an airstream flowing from the suction opening through an inlet located in the dust cup side wall. A suction source is in fluid communication with the dust cup first end. The suction source is located in the housing for generating and maintaining a suction airstream from the suction opening through the filter.
- Still further benefits and advantages of the present invention will become apparent to those of average skill in the art from a review of the following detailed description of the present invention.
- The invention may take form in certain parts and arrangements of parts, preferred embodiments of which will be described in detail in this specification and illustrated in the accompanying drawings which form a part hereof and wherein:
- FIG. 1 is a front elevational view of a vacuum cleaner according to the present invention;
- FIG. 2 is a side elevational view thereof;
- FIG. 3 is an enlarged exploded perspective view of a lower portion of the vacuum cleaner of FIG. 1;
- FIG. 4 is a rear perspective view of a dust cup of the vacuum cleaner of FIG. 3;
- FIG. 5 is an exploded perspective view of the dust cup of FIG. 3 from above;
- FIG. 6 is a top plan view of the dust cup of FIG. 5;
- FIG. 7 is an exploded perspective view of the dust cup of FIG. 3 from below;
- FIG. 8 is a cross sectional view of the vacuum cleaner of FIG. 2 with an upright housing thereof tilted back for use;
- FIG. 9 is a cross sectional view through the vacuum cleaner of FIG. 2 along lines9-9;
- FIG. 10 is a bottom plan view of the vacuum cleaner of FIG. 1;
- FIG. 11 is a schematic view of a filter according to another embodiment of the present invention; and,
- FIG. 12 is a schematic view of a filter according to a third embodiment of the present invention.
- Referring now to the figures, wherein the showings are for purposes of illustrating several preferred embodiments of the invention only and not for purposes of limiting same, FIG. 1 illustrates a stick vac A including a
nozzle base 10 having on an underside thereof asuction opening 12. As best shown in FIG. 10, also provided on the nozzle base arerollers 14, located immediately behind the suction opening, andrear wheels 16. With reference again to FIG. 1, supported on thenozzle base 10 is ahousing 20. Defined in the housing is a socket 22 (FIG. 3) for selectively accommodating adust cup 24. Extending from an upper end of thehousing 20 is ahandle 26. Positioned on a distal end of the handle is ahand grip 30 which supports aring 32. The ring can be used to, for example, hang the stick vac from a suitable peg or hook mounted on a wall or in a closet or the like since the stick vac is a relatively light weight appliance. - With reference now to FIG. 2, also provided on the hand grip is a
first cord hook 34. This cooperates with asecond cord hook 36 located on thehousing 20 in order to allow a conventional electrical cord (not illustrated) to be wrapped around the cord hooks when the appliance is not in use. - With reference now to FIG. 8, the
nozzle base 10 includes ahollow interior 40 which allows air to flow from thesuction opening 12 towards afirst conduit 42. The first conduit includes apivot area 44 at afirst end 46 thereof. The first conduit extends out of thenozzle base 10 and terminates at asecond end 48. The first conduitsecond end 48 is received in asecond conduit 50 extending from thehousing 20. To this end, thesecond conduit 50 has afirst end 52 which slips over the fist conduitsecond end 48. The two conduits are secured together by conventional means. The second conduit extends along a portion of thehousing 20 and terminates at a curvedsecond end 54 which, as is best illustrated in FIG. 3, leads to anopening 56. - The
opening 56 is located on aninterior wall 60 of thehousing 20 and is surrounded by anelastomeric gasket 62. As best seen in FIG. 9, a tangential, swirling,flow path 64 is thus provided for air entrained dirt which flows from thesuction opening 12 through the first andsecond conduits opening 56. - An
upper section 70 of the housing accommodates a motor/fan assembly 72. This includes afan 74 and amotor 76 positioned above the fan. Exhaust air from the fan flows out through exhaust vents 78 provided in thehousing 20. With reference again to FIG. 2, an on/offswitch 80 is located on the housingupper section 70. Also defined on the housing upper section is acatch 84 as best illustrated in FIG. 3. - With reference now to FIG. 4, the
dust cup 24 includes an openfirst end 92 and a closedsecond end 94 as well as aside wall 96 extending between the two ends and aninterior wall 97. Anopening 98 is defined in theside wall 96. Extending from thesecond end 94 of the dust cup is astub 100. As best illustrated in FIG. 8, thestub 100 protrudes into apocket 101 defined in thehousing 20 in order to allow thedust cup 24 to be pivotally mounted on the housing. In other words, thestub 100 andpocket 101 define a hinge assembly for the dust cup on the housing. - With reference now to FIG. 5, a
handle 102 is defined on theside wall 96 of the dust cup adjacent thefirst end 92 thereof. The handle accommodates a moveable, resilient, latch 104 having afinger grip 106. As best illustrated in FIG. 8, when a downward force is exerted on thelatch 104 at thefinger grip 106, the latch releases from thecatch section 84 on the housing thereby enabling the dust cup upper end to be pulled away from the housing. During this time, the dust cup pivots on the housing via a cooperation of thestub 100 inpocket 101 to provide a hinge function. - Selectively positioned in the
dust cup 24 is afilter assembly 110. With reference now to FIG. 7, the filter assembly includes afirst end 112 which is defined by aframe 114. The frame has a top wall 116 (FIG. 5) with arim 117 and anouter skirt 118 depending therefrom. Spaced from the outer skirt is aninner skirt 119. Defined in thetop wall 116 is ahandle 120 which is in the form of a bridge extending between a pair ofapertures ribs 126 which extend from theouter skirt 118 to therim 117. Achannel 127 is defined between the inner andouter skirts filter assembly 110 also has asecond end 128 which is defined by anend cap 130 having abottom wall 131. With reference again to FIG. 5, extending from the bottom wall is aninner rim 132 and askirt 134 defining anannular channel 136 therebetween. Afilter 140 extends between theframe 114 and theend cap 130. The filter can be made of a planar filter medium which can be pleated as at 142. The filter has afirst end 144 which is secured in thechannel 127 of theframe 114 and a second end 146 which is secured in thechannel 136 defined in theend cap 130, as may best be seen in FIG. 8. - The
filter assembly 110 is frustoconical or tapered in its construction. Moreover, the filter material ormedium 140 is also tapered in its shape as can be best seen in FIGS. 5 and 7. It is believed that the conical shape of the filter improves filtering efficiency, as compared with a right cylindrical shaped filter. This may be due, at least in part, to the increased efficiency of cyclonic airflow around the filter that is provided in the dust cup by the cooperation of the dust cupinner wall 97 and the filter. As is evident from FIG. 8, an approximately constant distance is defined between the filter and the inner wall of the dust cup so as to enhance the cyclonic flow of air around the filter and, hence, dirt separation. The conical filter shape also allows for an easier emptying of thedust cup 24 and may reduce the rate at which thefilter 140 becomes clogged. - As is evident from FIG. 8, at the second or smaller diameter end128 of the filter assembly, the
end cap 130 is secured to thefilter element 140. Similarly, at the first or larger diameter end 112 of the filter assembly, theframe 114 is secured to thefilter element 140. Theframe 114 includes the pair ofapertures filter material 140 into theinterior space 148. In other words, theframe 114 and thebottom wall 130 prevent airflow from entering theinterior 148 of the filter without passing through thefilter medium 140. - The generally conically shaped
filter assembly 110 is mounted in thedust cup 24 such that theframe 114 selectively engages the interior wall 99 of the dust cup via an interference fit between therim 117 of the top wall and the dust cupinterior wall 97. In this way, thefilter assembly 110 is releasably, yet securely, retained in its operative position, even when thedust cup 24 is removed from the vacuum cleaner A. Once this is accomplished, thefilter assembly 110 can be removed from thedust cup 24 simply by grasping thehandle 120 and pulling upward. Thereafter, the dust cup can be inverted so as to remove the dirt and dust contained therein. Subsequently, the dust cup can be righted again, the filter assembly can be reinstalled and the dust cup returned to thehousing 20. This is accomplished by placing thestub 100 in thepocket 101 and then pivoting the dust cup back into position until thelatch 104 engages thecatch 84. The latch will be depressed until a tip of the latch clears the backside of the catch and then resiliently snaps upward to hold the dust cup in position, as illustrated in FIG. 8. - The filter material or medium can be made from a suitable conventional planar thermoplastic material if so desired, so that the filter can be washed. Alternatively, the filter medium can be made from a suitable paper material. The
frame 114 andend cap 130 can be made from a suitable conventional thermoplastic material. Thefilter 140 can be secured to theframe 114 andend cap 130 by conventional means, such as adhesive, sonic welding or the like. - In use, as best shown in FIG. 8, air entrained dirt and dust enter the vacuum cleaner via
suction opening 12. The air stream flows through thehollow interior 40 of thenozzle base 10 and into thefirst end 46 of thefirst conduit 42. The air then flows through the first conduit and into thesecond conduit 50. Air flows out of the second conduit at its curvedsecond end 54. The air is directed into a cyclonic swirling flow in thedust cup 24 via the curvedsecond end 54 of the second conduit. The air impinges upon thefilter assembly 110 and swirls around it. - Thus, a
cyclonic airflow chamber 150 is defined in the dust cup between thefilter assembly 110 and theinterior wall 97 of the dust cup. Particles in the air stream, such as dirt, dust and the like are removed or separated from the suction airstream in the cyclonic airflow chamber. More specifically, the location and orientation of theinlet opening 56 and the generally cylindrical configuration of thecyclonic airflow chamber 150 causes the suction airstream to follow a swirling or cyclonic path within the chamber, as best shown in FIG. 9. Dirt and dust are flung outwardly by centrifugal force toward theinterior wall 97 of the dust cup 90. The removed particulate matter such as dirt, dust and the like then falls, via gravity, toward the bottom of thedust cup 24. It is retained therein until the dust cup is emptied. - Air, however, flows radially inward toward an
axis 152 of the dust cup and then upward around thebottom cap 130 and then radially inward through thefilter medium 140 into theinterior space 148 thereof. Air then flows upward again through theapertures handle 120 and into thefan 74. The suction airstream then flows into thefan 74 and out of thehousing 20 via the exhaust vents 78. Thus, a clean air-type vacuum cleaner is here disclosed. - As previously noted, the conical or tapered shape of the
filter assembly 110 enhances the removal effect of the cyclonic airflow path. Residual particulate matter, i.e., that which is not removed from the suction airstream as a result of the cyclonic action, normally lighter, smaller particles, are filtered by the filter element or medium 140 as the airflow path passes therethrough. Thefilter assembly 110 extends along theaxis 152 of the dust cup such that the filter assembly is centrally positioned in the dust cup. Also, theaxis 152 passes through thehandle 120, as may be evident from FIG. 8. Thus, thefilter assembly 110 is concentrically disposed in thedust cup 24. - The location and orientation of the
opening 56 in the housing and theopening 98 in the dust cup will effect the direction of cyclonic airflow. However, it is contemplated that the openings could be located and arranged differently. For example, the direction of cyclonic airflow could be reversed. Thus, the cyclonic airflow direction could be clockwise or counter clockwise depending upon the location and arrangement of the alignedopenings - Moreover, those skilled in the art will recognize that the term cyclonic as used herein is not meant to be limited to a particular direction of airflow rotation. Rather, the cyclonic action discussed in the present invention is merely intended to separate a substantial portion of the entrained dirt and dust from the suction airstream and cause such dirt and dust to be deposited in the
dust cup 24. The suction airstream then passes through the filter element ormedium 140, so that residual contaminants are removed, and exits the cyclonic airflow chamber, as well as the dust cup, through the twoopenings frame 114. - One potential disadvantage of the design illustrated in FIG. 8 is that the same portion of the
filter medium 140 is exposed to the airstream entering thedust cup 24. Over time, the dust particles in the airstream may wear the filter material due to prolonged use of the vacuum cleaner. With reference now to FIG. 11, one way of addressing this issue is to lengthen the skirt of the frame so that the airflow hits the skirt and not the filter medium. More particularly, FIG. 11 illustrates afilter assembly 160 having afirst end 162 which is provided with aframe 164. Extending away from the frame is askirt 168. The skirt has alower end 170. Afilter medium 180 includes anupper end 182 which is in contact with and secured to the skirtlower end 170 along asecurement line 184. The filter medium also has alower end 186 which is covered by abottom cap 188. - In the design illustrated in FIG. 11, the airflow, as depicted by
arrow 190, entering the dust cup (not shown) contacts the thermoplastic material of theskirt 168 and swirls around the skirt rather than directly contacting thefilter medium 180. The material of theframe 164 is less prone to wear than is the material of thefilter medium 180. While FIG. 11 illustrates a design in which the filter is protected from the incoming airstream, a disadvantage of the design illustrated in FIG. 11 is that the filter itself is somewhat shorter, hence, affording less filtration area. - With reference now to FIG. 12, another design is there illustrated. In this design, a
filter assembly 200 includes afirst end 202 having aframe 204. Extending from the frame is askirt 208. The skirt has alower end 210. Afilter medium 220 extends away from theframe 204. The filter medium has anupper end 222 which is secured via asecurement line 224 to an inside periphery of the skirt. The filter medium also has alower end 226 which is covered by abottom cap 228. With the design illustrated in FIG. 12, the airflow, depicted byarrow 230, contacts theskirt 208, but yet the length of thefilter medium 220 is not shortened. This is accomplished by extending the filter medium upwardly into the skirt until theupper end 222 of the filter is fastened to the skirt via thesecurement line 224. - The invention has been described with reference to several embodiments. Obviously, modifications and alterations will occur to others upon reading and understanding the preceding specification. It is intended that the invention be construed as including all such modifications and alterations insofar as they come within the scope of the appended claims, or the equivalents thereof.
Claims (28)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US10/339,829 US20040134022A1 (en) | 2003-01-10 | 2003-01-10 | Bagless stick type vacuum cleaner |
CA002423400A CA2423400C (en) | 2003-01-10 | 2003-03-25 | Bagless stick type vacuum cleaner |
US11/356,571 US7507269B2 (en) | 2003-01-10 | 2006-02-17 | Bagless stick type vacuum cleaner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/339,829 US20040134022A1 (en) | 2003-01-10 | 2003-01-10 | Bagless stick type vacuum cleaner |
Related Child Applications (1)
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US11/356,571 Continuation US7507269B2 (en) | 2003-01-10 | 2006-02-17 | Bagless stick type vacuum cleaner |
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US20040134022A1 true US20040134022A1 (en) | 2004-07-15 |
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Application Number | Title | Priority Date | Filing Date |
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US11/356,571 Expired - Fee Related US7507269B2 (en) | 2003-01-10 | 2006-02-17 | Bagless stick type vacuum cleaner |
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Application Number | Title | Priority Date | Filing Date |
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US11/356,571 Expired - Fee Related US7507269B2 (en) | 2003-01-10 | 2006-02-17 | Bagless stick type vacuum cleaner |
Country Status (2)
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Also Published As
Publication number | Publication date |
---|---|
CA2423400A1 (en) | 2004-07-10 |
US7507269B2 (en) | 2009-03-24 |
CA2423400C (en) | 2005-05-17 |
US20060162118A1 (en) | 2006-07-27 |
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Legal Events
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AS | Assignment |
Owner name: ROYAL APPLIANCE MFG. CO., OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MURPHY, JOHN S.;KHALIL, DAVID;WRIGHT, MICHAEL F.;AND OTHERS;REEL/FRAME:013665/0407 Effective date: 20030103 |
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Owner name: ROYAL APPLIANCE MFG. CO., OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MURPHY, JOHN S.;KHALIL, DAVID;WRIGHT, MICHAEL F.;AND OTHERS;REEL/FRAME:013884/0939;SIGNING DATES FROM 20030103 TO 20030116 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |