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Publication numberUS3797064 A
Publication typeGrant
Publication dateMar 19, 1974
Filing dateOct 20, 1972
Priority dateOct 20, 1972
Publication numberUS 3797064 A, US 3797064A, US-A-3797064, US3797064 A, US3797064A
InventorsFarland C Mac
Original AssigneeScott & Fetzer Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Filter bag cleaning means
US 3797064 A
Abstract
A hardbox upright vacuum cleaner having a filter bag cleaning brush within the box which is operable by a handle projecting from the box. The filter bag is enclosed within the box and is filled with a stiffening material, such as short fibers. Dirt-laden air is drawn against the outside surface of the bag so that the dirt is collected on the bag surface. The collected dirt is scraped from the bag surface by the bag cleaning brush. A removable dirt collecting box is provided beneath the bag for disposal of the dirt.
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United States Patent MacFarland Mar. 19, 1974 FILTER BAG CLEANING MEANS 2,405.129 8/1946 Bible.. 15/352 x 1,763,397 61930 H h l5 352 X [75] Inventor: Charles H. MacFarland, Rocky 1.069.754 41913 25/296 Rlvel', Ohio 971,895 10/1910 .loedicke 55/296 [73] Assignee: The Scott & Fetzer Company,

Cleveland, Ohio Primary Examiner-Harvey C. Hornsby 1 Assistant ExaminerC. K. Moore [22] Flled: 1972 Attorney, Agent, or FirmMcNenny, Farrington, [21] Appl. No.: 299,217 Pearne & Gordon [52] US. Cl 15/351, 15/352, 55/296, [57] ABSTRACT 55/379 55/473 A hardbox upright vacuum cleaner having a filter bag Illlt. cleaning brush within the box is Operable a Fleld of Search handle p j g f the box. The fil b g i 55/304 473 closed within the box and is filled with a stiffening material, such as short fibers. Dirt-laden air is drawn [56] References cued against the outside surface of the bag so that the dirt is UNITED STATES PATENTS collected on the bag surface. The collected dirt is 2.594 456 4/1952 Kroenlein 15/352 X scraped from the bag surface by the bag cleaning 2,020,120 4 H1935 Leathers 55/341 brush. A removable dirt collecting box is provided be- 3306342 9/1957 P 15/351 neath the bag for disposal of the dirt. 2.823.76 2/1958 Bunnell 55/341 X 3,639,940 2/1972 Carlson et al 15/352 3 Claims, 6 Drawing Figures PATENTEBHAR 19 m4 3; 797; 064

SHEEI 2 BF 2 FILTER BAG CLEANING MEANS BACKGROUND OF THE INVENTION There have been various proposals for cleaning the dirt and lint from the filtering material in vacuum cleaners. In those vacuum cleaners which do not include disposable dirt bags, it has been proposed to remove the dirt and lint from the filtering material by employing devices which either vibrate or beat the material. Examples of filter vibrators are shown in U.S. Pat.

Nos. 2,488,300; 2,522,498; 2,522,709; 2,534,578; 2,558,429; 2,585,508; and 3,484,889. Examples of filter heaters are shown in U.S. Pat. Nos. 2,564,734 and 2,586,876. These beater and vibrator devices are employed with filter constructions which may be easily vibrated or beaten.

There are filter constructions, however, which are not easily cleaned by the foregoing devices. For example, there is disclosed in U.S. Pat. No. 3,160,908 a sweeping machine having a dust separator which includes a plurality of depending filtering pockets through which the air is forced for separating the dust on the outer surfaces of the pockets. The pockets may contain a separator to maintain the sides of the pockets in spaced relation. The outside surface of the filter pockets is cleaned during use, since the pockets move in a pendulum fashion as the machine changes direction and speed. In addition, a mechanism is provided to bounce the pockets up and down to loosen accumu- Iated dirt.

Although the arrangement shown in U.S. Pat. No 3,160,908 may effectively clean the filter pockets, such an arrangement is unsuitable for cleaning filter pockets provided in a hand-operated hardbox upright vacuum cleaner, since the pockets in such a cleaner are not vertically suspended for pendulum motion during normal cleaning operations and since it is impractical to make the box large enough to accommodate such motion in a hand-operated cleaner.

SUMMARY OF THE INVENTION This invention provides a cleaning mechanism for pocket-type filters in a hardbox upright vacuum cleaner which effectively cleans the filter without relying upon motion of the pockets or upon mechanical agitation or beating of the filter material. According to this invention, a hardbox upright vacuum cleaner is provided with a filter which includes a plurality of Iongitudinally extending filter pockets within the hardbox portion of the cleaner having their upper ends joined to a manifold. Each pocket is spaced from each other pocket and is filled with a stiffening material, such as coarse fibers or the like. A cleaning brush assembly having a plurality of spaced brushes is mounted within the box so that the brushes engage the exposed planar surfaces of the filter pockets. The brush assembly is provided with a handle which projects from the box so that by grasping the projecting end of the handle, the brushes may be caused to traverse the planar faces of the filter pockets. A removable dirt box or collector is provided below the filter pockets to catch the dirt which is brushed from the filter pockets. The brushes maintain the filter pockets in a separated condition when the box is in any position during cleaning operatrons.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hardbox upright vacuum cleaner incorporating the subject matter of this invention;

FIG. 2 is a rear elevational view of the hardbox portion of the vacuum cleaner illustrated in FIG. 1;

FIG. 3 is a cross sectional view, the plane of the section being indicated by the line 33 in FIG. 2;

FIG. 4 is a cross sectional view, the plane of the section being indicated by the line 4-4 in FIG. 3;

FIG. 5 is a perspective view of the filter assembly according to this invention; and

FIG. 6 is a perspective view of the cleaning brush assembly according to this invention.

DETAILED DESCRIPTION OF THE DRAWINGS In FIG. 1 of the drawings, there is illustrated a hardbox upright vacuum cleaner 10. The hardbox upright vacuum cleaner 10 includes a motor and fan housing 1 1, a brush nozzle portion 12 which may be removably attached to the housing 11, in a manner more fully set forth in copending application Ser. No. 299,345, filed Oct. 20, 1972, a filter housing 13 which is pivotally connected to the motor housing 11, and an operating handle 14.

As is customary in hardbox upright-type vacuum cleaners, a first hose 15 extends from the brush nozzle portion 12 to the filter housing 13. A second hose 16 extends from the housing 13 to a motor fan unit (not shown) within the housing 11. Thus, air is drawn by the motor fan unit from the portion 12 through the first hose 15, the housing 13, the second hose l6, and then through a suitable clean air exhaust (not shown).

As may be seen most clearly in FIG. 4, a filter unit 17 is mounted within the housing 13. The filter unit 17 includes a plurality of pockets 18 which open into a header or manifold 19. The pockets 1 8 may be sealed to the manifold 19 by a suitable adhesive and/or rivets (not shown). The pockets 18 are filled with a stiffening material 20 which may comprise a multiplicity of rubberized hair or bristles.

The manifold 19 is fixed to the upper end of the housing 13 and has a downwardly extending elbow extension 21 which is attached to one end of the hose 16. The other hose l5 communicates with an elbow extension 22 which is provided at the lower end of the housing 13.

First and second axially extending ducts 23 and 24, respectively, are sealed to the sides of the housing 13, as may be seen most clearly in FIG. 3. The duct 23 carries the hose 15 at its lower endto prevent kinking of the hose during operation of the cleaner. The duct 24 carries the hose 16. The housing 13 and the upper ends of the ducts 23 and 24 are sealingly capped by a cover 25 upon which the handle 14 is mounted. The lower ends of the ducts 23 and 24 are removably fixed to hinge members (not shown) which are provided on the housing 11.

The bottom end of the housing 13 is closed by a dirt box 26. The dirt box 26 may be removed for cleaning by releasing a latch 27 and by sliding the box 26 rearwardly with respect to the housing 13 along guide runners 28 formed in the lower end of the housing 13 (FIG. 4).

As may be seen most clearly in FIG. 4, the motor fan unit draws air through the hose 16. This air is filtered,

since it is drawn through the filter pockets 18. Thus, dirt-laden air is drawn from the brush nozzle 12 through the hose 15 and the dirt is deposited on the external surface of the filter pockets 18. Of course, some dirt will fall into the dirt box 26. Eventually, however,

- the outside surface of the filter pockets 18 will become coated with dirt and lint,

To remove the dirt from the outside surface of the filter pockets 18, there is provided a filter cleaning brush assembly 29. The brush assembly 29 includes a rod 30 having a handle 31 at its upper end and a mounting plate 32 at its lower end. The plate 32 is fixed to the rod by a pair of nuts 33. A plurality of brushes 34 project from the plate 32 and are spaced apart so that their bristles bear against the planer surfaces of the pockets 18, as may be seen in FIG. 3. The plate 32 has a narrowed neck portion 35, which projects through a longitudinal slot 36 in the housing 13. The rod 30 extends within the duct 23 and projects through the cap 25. In order to maintain suction through the casing 13, a suitable seal (not shown) is provided between the rod 30 and the cap 25. A seal 37 is provided in the duct 23 beneath the rod 30.

When the surfaces of the pockets l8 become covered with dirt and lint (thereby reducing the efficiency of idly separated condition so that they are spaced from each other and from the sidewalls-of the housing 13.

The invention is not restricted to the slavish imitation of each and every detail set forth above. Obviously, devices may be provided which change, eliminate, or add certain specific details without departing from the scope of the invention. What is claimed is:

1. A vacuum cleaner having a motor housing, a suc-v tion nozzle connected to said housing, an elongated filter box for filtering dirt-laden air picked up by said nozzle, first conduit means connecting said nozzle to one end of the interior of said filter box for conducting said dirt-laden air to a first portion of said interior, second conduit means connecting said motor housing to the other end of the interior of said filter box for conducting fiitered air from a second portion of said interior to a fan means Within said motor housing, filter means within said box and separating said first and second portions, said filter means comprising a plurality of elongated filter bags fixed at said other end of said filter box and having freely hanging distal ends extending toward said one end, said filter bags having stiffened planar faces and being arranged in spaced face-to-face apposition, brush means engaging each planar face of said filter bags adjacent said distal ends and providing the sole spacing means for those ends, and means to move said brush means along said planar faces toward.

the other end of said filter box to remove dirt from the surface of said filter bags.

2. A vacuum cleaner according to claim I, wherein said means to move said brush means comprises a handle projecting through a wall of said filter box.

3. A vacuum cleaner according to claim 2, including a dirt box removably attached to said one end of said filter box for collecting dirt removed from said filter means.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US971895 *Jan 27, 1910Oct 4, 1910Urban JoedickeDust-collector.
US1069754 *Dec 2, 1910Aug 12, 1913Thomas Brown BaillieSuction cleaning apparatus.
US1763397 *Jun 3, 1924Jun 10, 1930Job HutchinsonVacuum cleaner
US2020120 *Oct 17, 1930Nov 5, 1935Quadrex CorpVacuum cleaner filter
US2405129 *Aug 15, 1942Aug 6, 1946Hoover CoVacuum cleaning system
US2594456 *Oct 16, 1948Apr 29, 1952Hoover CoVacuum cleaner
US2806242 *Sep 6, 1955Sep 17, 1957Whirlpool CoVacuum cleaner
US2823762 *Mar 24, 1954Feb 18, 1958Boyar Schultz CorpDust collector
US3639940 *Aug 22, 1969Feb 8, 1972Tennant CoFilter chamber
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4246011 *Nov 3, 1978Jan 20, 1981Guido OberdorferVacuum cleaning apparatus
US4364146 *Nov 26, 1980Dec 21, 1982Electrolux CorporationQuick cleanout for upright vacuum cleaner
US4646482 *Nov 12, 1985Mar 3, 1987Clements National CompanyRecirculating sandblasting machine
US4993107 *May 15, 1989Feb 19, 1991Dulevo S.P.A.Filtering and collecting device of solid and powder refuse for industrial and civil suction apparatus
US5106488 *Feb 22, 1990Apr 21, 1992Ab Ph. Nederman & Co.Device for separating particles from flowing medium
US5107567 *Aug 23, 1991Apr 28, 1992White Consolidated Industries, Inc.Stick type vacuum cleaner with a dirt cup secured by a finger-operated latch
US6003196 *Jan 9, 1998Dec 21, 1999Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US6026540 *Jul 24, 1998Feb 22, 2000Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US6070291 *Dec 18, 1998Jun 6, 2000Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6148473 *Apr 6, 1999Nov 21, 2000Oreck Holdings, LlcBalanced flow vacuum cleaner
US6219880Aug 25, 1999Apr 24, 2001Pullman-Holt CorporationVacuum cleaner
US6243916 *Apr 6, 1999Jun 12, 2001Oreck Holdings, LlcBalanced flow vacuum cleaner conduits
US6260234Oct 8, 1999Jul 17, 2001Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US6269518Dec 8, 1999Aug 7, 2001Shell Electric Mfg. (Holdings) Co. Ltd.Bagless vacuum cleaner
US6277163 *Apr 6, 1999Aug 21, 2001Oreck Holdings LlcVacuum cleaner outer bag
US6277164 *Apr 6, 1999Aug 21, 2001Oreck Holdings, LlcBalanced flow vacuum cleaner bag interface
US6301744May 12, 2000Oct 16, 2001Oreck Holdings, LlcMethod for drawing a flow of air and particulates into a vacuum cleaner
US6353963Dec 14, 1999Mar 12, 2002Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6401295Mar 27, 2001Jun 11, 2002Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6463622Jul 6, 2001Oct 15, 2002Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US6484350Nov 13, 2001Nov 26, 2002Shell Electric Mfg. (Holdings) Co. Ltd.Bagless canister vacuum cleaner
US6588054Mar 27, 2001Jul 8, 2003National City BankUpright vacuum cleaner with cyclonic airflow
US6588055Mar 27, 2001Jul 8, 2003National City BankUpright vacuum cleaner with cyclonic air flow
US6591446Sep 17, 2002Jul 15, 2003Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6598263May 9, 2001Jul 29, 2003The Hoover CompanyVacuum cleaner dirt collecting system with filter cleaning devices
US6625845 *Mar 23, 2001Sep 30, 2003Sharp Kabushiki KaishaCyclonic vacuum cleaner
US6735815Aug 13, 2002May 18, 2004Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6735817Mar 11, 2002May 18, 2004Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6745432Oct 15, 2002Jun 8, 2004Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US6811584 *May 24, 2002Nov 2, 2004Samsung Gwangju Electronics Co., Ltd.Cyclone dust collecting apparatus for a vacuum cleaner
US6824580 *May 24, 2002Nov 30, 2004Samsung Gwangju Electronics Co., Ltd.Cyclone dust collecting apparatus for a vacuum cleaner
US6848146Jul 17, 2003Feb 1, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US6857164Sep 29, 2003Feb 22, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6901626Jun 4, 2002Jun 7, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6928692 *Sep 12, 2002Aug 16, 2005Samsung Gwangju Electronics Co., Ltd.Cyclone-type dust collecting apparatus for vacuum cleaner
US6944909May 6, 2004Sep 20, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US6951045Aug 20, 2002Oct 4, 2005Royal Appliance Mfg. Co.Vacuum cleaner having hose detachable at nozzle
US7117557May 17, 2005Oct 10, 2006Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US7117558Sep 8, 2004Oct 10, 2006Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US7131165Sep 10, 2004Nov 7, 2006Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US7134166Apr 26, 2005Nov 14, 2006Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US7146681Nov 29, 2004Dec 12, 2006Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US7222392 *Oct 3, 2001May 29, 2007Panasonic Corporation Of North AmericaAirflow system for bagless vacuum cleaner
US7887624Sep 29, 2006Feb 15, 2011Black & Decker Inc.Gas concrete saw filtration system
US8001652Nov 30, 2004Aug 23, 2011Techtronic Floor Care Technology LimitedUpright vacuum cleaner with cyclonic airflow
US8272097 *Aug 27, 2008Sep 25, 2012Miele & Cie. KgUpright vacuum cleaner
US8272134Jul 2, 2008Sep 25, 2012Black & Decker Inc.Power cutter
US8336165Aug 27, 2008Dec 25, 2012Miele & Cie. KgUpright vacuum cleaner
US8388415Jul 1, 2008Mar 5, 2013Black & Decker Inc.Power cutter
US9060665Mar 1, 2013Jun 23, 2015Euro-Pro Operating LlcFloor cleaning appliance
US20030159235 *May 14, 2002Aug 28, 2003Samsung Gwangju Electronics Co., Ltd.Cyclone dust collecting apparatus for a vacuum cleaner
US20030159236 *May 24, 2002Aug 28, 2003Jang-Keun OhCyclone dust collecting apparatus for a vacuum cleaner
US20030159237 *May 24, 2002Aug 28, 2003Jang-Keung OhCyclone dust collecting apparatus for a vacuum cleaner
US20030208879 *Sep 12, 2002Nov 13, 2003Jang-Keun OhCyclone-type dust collecting apparatus for vacuum cleaner
US20040016078 *Jul 17, 2003Jan 29, 2004Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US20040025287 *Oct 3, 2001Feb 12, 2004Mccormick Michael J.Airflow system for bagless vacuum cleaner
US20040068828 *Sep 29, 2003Apr 15, 2004Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US20040205929 *May 6, 2004Oct 21, 2004Royal Appliance Mfg. CoUpright vacuum cleaner with cyclonic air flow
US20050028318 *Sep 8, 2004Feb 10, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US20050055796 *Sep 10, 2004Mar 17, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US20050091786 *Nov 29, 2004May 5, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US20050091787 *Nov 30, 2004May 5, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US20050183232 *Apr 26, 2005Aug 25, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
US20050217066 *May 17, 2005Oct 6, 2005Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic air flow
US20090007435 *Jul 2, 2008Jan 8, 2009Black And Decker Inc.Power cutter
US20090007440 *Jul 1, 2008Jan 8, 2009Black And Decker Inc.Power cutter
US20090019710 *Jul 2, 2008Jan 22, 2009Black And Decker Inc.Power cutter
US20090056057 *Aug 27, 2008Mar 5, 2009Miele & Cie. KgUpright vacuum cleaner
US20090056058 *Aug 27, 2008Mar 5, 2009Miele & Cie. KgUpright vacuum cleaner
USRE38949 *Feb 12, 2002Jan 31, 2006Royal Appliance Mfg. Co.Upright vacuum cleaner with cyclonic airflow
USRE38998 *Jan 23, 2004Mar 7, 2006Oreck Holdings, LlcBalanced flow vacuum cleaner
CN104014201A *Jun 26, 2014Sep 3, 2014河南工业大学Dust collector cloth bag cleaning machine applicable to grain and oil processing industry
CN104014201B *Jun 26, 2014Jan 20, 2016河南工业大学应用于粮油加工行业的除尘器布袋清理机
DE2749480A1 *Nov 4, 1977May 10, 1979Oberdorfer GuidoFilter eines reinigungsgeraetes
EP0342504A1 *May 10, 1989Nov 23, 1989DULEVO INTERNATIONAL S.p.A.Filtering and collecting device of solid and powder refuse for industrial and civil suction apparatus
EP1797807A1 *Mar 22, 2000Jun 20, 2007Oreck Holdings, LLCBalanced flow vacuum cleaner conduits
WO2000059359A1 *Mar 22, 2000Oct 12, 2000Oreck Holdings, LlcBalanced flow vacuum cleaner conduits
WO2000059361A1 *Mar 29, 2000Oct 12, 2000Oreck Holdings, LlcVacuum cleaner outer bag
Classifications
U.S. Classification15/351, 55/341.1, 55/473, 15/352, 55/305, 55/296, 55/DIG.300, 55/379, 55/DIG.200, 55/429
International ClassificationA47L9/20
Cooperative ClassificationA47L9/20, Y10S55/03, Y10S55/02
European ClassificationA47L9/20
Legal Events
DateCodeEventDescription
Mar 19, 1987ASAssignment
Owner name: SCOTT FETZER COMPANY, THE, A CORP. OF DE.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. ASSIGNMENT OF ASSIGNORS INTEREST, EFFECTIVE DECEMBER 31, 1986.;ASSIGNOR:SCOTT & FETZER COMPANY, THE, A OH. CORP.;REEL/FRAME:004717/0286
Effective date: 19861126