US3909875A - Vacuum cleaner construction - Google Patents

Vacuum cleaner construction Download PDF

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Publication number
US3909875A
US3909875A US403189A US40318973A US3909875A US 3909875 A US3909875 A US 3909875A US 403189 A US403189 A US 403189A US 40318973 A US40318973 A US 40318973A US 3909875 A US3909875 A US 3909875A
Authority
US
United States
Prior art keywords
disc
housing
opening
nozzle unit
bristles
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 - Lifetime
Application number
US403189A
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English (en)
Inventor
Eberhard Rother
Miroslav Beranek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vorwerk and Co Elektrowerke GmbH and Co KG
Original Assignee
Vorwerk and Co Elektrowerke GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19722252493 external-priority patent/DE2252493C3/de
Application filed by Vorwerk and Co Elektrowerke GmbH and Co KG filed Critical Vorwerk and Co Elektrowerke GmbH and Co KG
Application granted granted Critical
Publication of US3909875A publication Critical patent/US3909875A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0405—Driving means for the brushes or agitators
    • A47L9/0416—Driving means for the brushes or agitators driven by fluid pressure, e.g. by means of an air turbine
    • 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
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0461—Dust-loosening tools, e.g. agitators, brushes
    • A47L9/0466—Rotating tools
    • A47L9/0472—Discs

Definitions

  • a nozzle unit for a vacuum cleaner has a housing pro- Oct 26 1972 German 2252493 vided with an opening, and a brush disc is located in y the housing and has bristles extending outwardly [52] U S Cl l5/387 15/29 15/1 through the opening.
  • a mounting arrangement mounts 15/372 the disc so that it rotates about an axis which extends [51] Int Cl 2 A47L 9/04 substantially normal to the plane of the opening, per- [58] Field 385 387 mitting the disc to be displaced inwardly of the open- 1 5/29 ing along its axis of rotation.
  • a biasing spring yieldably resists such inward displacement, and a sealing ar- [56] References Cited rangement seals the mounting arrangement and the b1as1ng sprmg with reference to the ambient atmo- UNITED STATES PATENTS Sphere. 634,813 10/1899 Gans 15/387 X 1,497,921 6/1924 Levedahl 15/ 180 X 8 Claims, 5 Drawing Figures US. Patent Oct. 7,1975 Sheet 1 of2 3,909,875
  • the present invention relates generally to a vacuum cleaner construction, and more particularly to a nozzle unit for such a vacuum cleaner construction.
  • such a nozzle unit uses a flattened suction conduit the peripheral wall of which is provided with a number of air intake openings.
  • a coupling is provided at the open end of the flattened conduit to permit mounting of the rotating brush, and the coupling is turned by a drive shaft which extends centrally and longitudinally through the flattened conduit.
  • a turbine is mounted on the shaft in the region intermediate the coupling and the suction conduit, in an airflow channel which guides the air to the turbine. At the suction side, the turbine has stationary air guide vanes through the center of which the drive shaft extends.
  • the drive shaft is surrounded by a planetary gear and carries at its free end which extends outwardly beyond the stationary vanes a vane wheel. The shaft drives the brush which is mounted on the conduit by means of the coupling, due to the action of the aspirated flowing air as it impinges upon the vane wheel.
  • a concomitant disadvantage of this prior-art construction is the fact that it is rather subject to malfunction. This is particularly true in view of the fact that the brush rotates on a single relatively thin shaft which must not be permitted to be out-of-round because otherwise the brush will not properly operate. Should the shaft be out-of-round, the imbalance created thereby could be sufficient to counteract the rotational motion produced by the turbine and the brush could come to a standstill.
  • Another object of the invention is to provide such an improved nozzle unit which permits a simple but highly effective cleaning of upholstery, garments and the like.
  • Another object of the invention is to provide such a nozzle unit which is capable of providing thorough cleaning even in crevices, recesses, the base of the nap of a fabric and the like.
  • An additional object of the invention is to provide such a nozzle unit wherein a rotary brush is provided which will always rotate properly and uniformly, and which will provide a uniform cleaning operation at all times.
  • the nozzle unit comprises a housing having an opening, and a brush disc which is located in the housing and which has bristles extending outwardly through the opening.
  • Mounting means mounts the disc for rotation about an axis which extends substantial normal to the plane of the opening.
  • the disc is displaceable inwardly of the opening along this axis, and biasing means yieldably resists such displacement. Sealing means seals the mounting means and the biasing means with reference to the ambient atmosphere.
  • the brush disc according to the present invention is turbine driven, that is it is provided with turbine vanes which drive it in response to impingement of the vanes by the air which is being aspirated by the vacuum cleaner.
  • the mounting means and the biasing means must be protected against contact with such objects, which is done by providing the sealing means in accordance with the present invention.
  • the brush disc be provided with rows of tufts composed of bristles, with the arrangement being such that in any operating position (including any displaced position) the brush disc will accommodate itself to the particular operating condition and will always exert the same pressure upon the object to be cleaned.
  • the brush is surrounded by the housing in the construction according to the present invention, so that the inlet to the suction conduit with which the housing is connected is in fact constituted by the interior of the housing, meaning that suction is applied directly above the surface portion which is being brushed by the rotating brush.
  • a further advantage is obtained by the possibility of mounting the novel nozzle unit on a flexible suction hose, so that the nozzle unit can be used in the same manner as a conventional dust brush, making its use simple and assuring a reliable pickup of dust which has been loosened by the disc.
  • FIG. 1 is a vertical section through a nozzle unit according to the present invention
  • FIG. 2 is a bottom-plan view of FIG. 1, with the bristles being shown diagrammatically;
  • FIG. 3 is a fragmentary vertical sectional detail view, showing a detail of FIG. 1;
  • FIG. 4 is a bottom-plan view of the brush disc in FIG. 1, showing the arrangement of the turbine air guide vanes;
  • FIG. 5 is a perspective fragmentary enlarged detail view, showing the turbine guide vanes with the associated inlet and outlet angles.
  • FIG. 1 shows a nozzle unit for a vacuum cleaner, having a brush disc 1 which is mounted in a housing 4 having an open side through which the bristles of the brush disc extend.
  • a mounting portion or socket 17 Located in the interior of the housing is a mounting portion or socket 17, advantageously of one piece with the wall of the housing 4.
  • other ways of fitting are conceivable, for instance a connection by adhesive means or the like.
  • a tubular guide 18 is also mounted in the socket 17, again being press-fitted in the same in the illustrated embodiment.
  • the tubular guide 18 has two functions, on the one hand to accommodate a biasing spring 19 and on the other hand to support a metallic sleeve of a central slide bearing 5, which sleeve 10 is accommodated in turn at its lower end in a mounting portion 9 of the brush disc 1.
  • a space 23 is provided within the portion 9 and assures that the brush disc 1 with the bristles 7 thereon can be shifted inwardly and outwardly of the open side of the housing 4 along its axis of rotation which is defined by a journalling pin 2 and extends normal to the plane of the opening of the housing 4.
  • the extent to which the brush disc 1 can be displaced inwardly and outwardly of the open side of the housing 4 is dictated by the length of the space 23 in the direction of the journalling pin 2, and by the location of two abutments constituted by an upper washer 29 and a lower washer 28 which are both clamped onto the tubular guide 18.
  • a cap 24 is pressfitted into the lower open end of the portion 9 and constitutes a part of the disc 1.
  • a bearing ball 21 engages the inner side of the cap 24 and the axial end face of the pin 2 which faces this inner side, in line contact with both of them.
  • the cap 24 is, of course, located at the center 14 of the disc 1.
  • the length of this recess is slightly greater than the length of the recess 23 in axial direction of the pin 2.
  • the portion provided with the recess forming the shoulder 13 surrounds the cupped portion 22 so that the overlapping parts of these two portions together constitute the sealing means 3 which is effective even though the disc 1 moves upwardly and inwardly (with reference to its orientation in the drawing) against the spring action of the spring 19.
  • the provision of the sealing means 3 assures that the inner components which mount the disc 1, and in particular the slide bearing 5, are protected against dust and the entry of other contaminants such as threads or the like, as is particularly clearly shown in FIG. 3.
  • FIGS. 1 and 3 show the disc 1 displaced inwardly of the housing 4 to the maximum possible extent. Normally, however, that is when no inward pressure is exerted upon the bristles 7 of the disc 1, the spring 19 will urge the disc 1 outwardly of the housing 4, so that normally the lower end 12 of the metallic sleeve 10 is in engagement with the washer 28. In this position, the recessed portion of the collar 6 and the portion 22 overlap one another in axial direction to only a small extent.
  • the periphery of the disc 1 is provided with substantially radially extending air vanes vandes 8 which are most clearly shown in FIGS. 2 and 4.
  • the underside 25 of the disc 1, that is the side which faces the material to be cleaned, is provided with rows of tufts each of which is composed of bristles, and these rows are identified with reference numeral 7 and extend, as most clearly shown in FIGS. 2 and 4, outwardly from the axis assure that the torque which develops in operation is no greater than that produced by the disc 1 itself.
  • the invention provides for the capability of the disc 1 to yield inwardly of the housing against the force of the spring 19.
  • the cleaning pressure with which he bristles engage the surface to be cleaned is determined only by the spring 19 via the pin and the bearing ball 21.
  • the unit according to the present invention forms a part of such a vacuum cleaner and is to be used with the same.
  • the left-hand tubular portion of the housing 4 (see FIG. 1) is connected with the inlet of a vacuum cleaner conduit or hose to produce suction in the housing 4.
  • This suction picks up any dust and other dirt which is drawn from the exterior of the housing through the vanes 8 in axial direction of the pin 20. Since the vanes 8 are so arranged, as shown in FIG. 5, that the inlet angle 15 is greater than the outlet angle 16 which they include, a high torque will be generated and the disc 9 will be rotated at relatively high speed. After passing through and between the vanes 8, the air with the entrained dust and other dirt will move in a spiral pass upwardly in the annular clearance 30, and will then pass through the lefthand tubular portion of the housing 4 (see FIG. 1) and on into the vacuum cleaner itself.
  • FIGS. 1 and 2 show particularly clearly that there is also provided an annulus 26 of bristles, which includes a number of bristles mounted on a projecting portion 27 of the housing 4.
  • This projecting portion 27 with the bristles thereon serves to provide for the preliminary loosening of dust and dirt so that the same can be picked up more readily by the bristles of the rows 7 on the rotating disc 1.
  • the projection 27 with the bristles thereon greatly facilitates the cleaning in folds of materials, in corners of upholstered furniture, and in removing dust and dirt from other crevices or spaces which are not readily accessible for the disc 1.
  • a nozzle unit comprising a housing having an inlet opening for particle-carrying air, and an outlet communicating with the suction source of the vacuum cleaner; a brush disc located in said housing and having bristles extending outwardly through said opening, and a plurality of circumferentially spaced inclined vanes extending radially of the disc periphery and arranged to be impinged by air flowing from said inlet opening to said outlet so that such air drives said disc in rotation", mounting means mounting said disc for rotation about an axis which extends substantially normal to the plane of said opening, and for displacement inwardly of said opening along said axis; biasing means yieldably resisting said displacement; and sealing means sealing said mounting means and biasing means against contact with the particlecarrying air flowing through said housing.
  • a nozzle unit as defined in claim 1 said disc having a side facing said opening and provided with a plurality of tufts of said bristles arranged in straight rows which extend outwardly from said axis.
  • sealing means including an annular collar on an other side of said disc opposite to said one side, and said mounting means including a slide bearing located within the confines of said collar.
  • a nozzle unit as defined in claim 4 said collar having an open end facing inwardly of said housing and being provided with a circumferentially extending step; and said sealing means further comprising an annular portion provided on said housing axially adjacent said open end and having an edge portion which partly extends into said step.
  • a nozzle unit as defined in claim 1 said mounting means including a portion of said housing extending towards said opening, and wherein said sealing means comprises an extension of said portion, said extension being cupped in direction towards said disc and said disc having a tubular part telescoped over said extension.
  • said mounting means comprising a tubular guide mounted in said housing and having an open end facing said opening, a journal pin slidably received in said guide and having a free end portion extending from said open end, said biasing means urging said pin outwardly of said guide, a bearing ball intermediate and in engagement with an inwardly directed surface of said disc and an axial end face of said end portion, and means mounting said disc on said tubular guide slidab le axially of the same against the action of said biasing means.
US403189A 1972-10-26 1973-10-03 Vacuum cleaner construction Expired - Lifetime US3909875A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722252493 DE2252493C3 (de) 1972-10-26 Mundstück für einen Staubsauger zum Reinigen von Polstern, Kleidern o.dgl

Publications (1)

Publication Number Publication Date
US3909875A true US3909875A (en) 1975-10-07

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ID=5860104

Family Applications (1)

Application Number Title Priority Date Filing Date
US403189A Expired - Lifetime US3909875A (en) 1972-10-26 1973-10-03 Vacuum cleaner construction

Country Status (12)

Country Link
US (1) US3909875A (ja)
JP (1) JPS4995464A (ja)
AT (2) AT326602B (ja)
BE (1) BE805274A (ja)
CH (1) CH562602A5 (ja)
DK (1) DK137308C (ja)
ES (1) ES419989A1 (ja)
FR (1) FR2248011B1 (ja)
GB (1) GB1445160A (ja)
IT (1) IT994849B (ja)
NL (1) NL171858C (ja)
SE (1) SE385435B (ja)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148110A (en) * 1975-03-02 1979-04-10 Moen Asbjoern Rotating scraping or abrading tool
US4538322A (en) * 1984-02-23 1985-09-03 Vorwerk & Co. Interholding Gmbh Attachment nozzle for a vacuum cleaning system
US4554702A (en) * 1984-08-10 1985-11-26 The Scott & Fetzer Company Vacuum driven tool
US4586210A (en) * 1985-03-11 1986-05-06 Mueller John L Rotation brush mechanism with speed control governor
US4589161A (en) * 1984-08-10 1986-05-20 The Scott & Fetzer Company Vacuum driven tool
US4686729A (en) * 1985-05-23 1987-08-18 Claber S.P.A. Washing brush with water supply and rotating bristles especially for motor vehicles
US4692956A (en) * 1985-12-31 1987-09-15 Kassis Amin I Pool vacuum
US4733532A (en) * 1985-08-09 1988-03-29 The Scott Fetzer Company Fluid power train for small appliances
US5044034A (en) * 1990-10-29 1991-09-03 Iannucci Anthony A Swimming pool vacuum cleaner with rotary brush
US6061860A (en) * 1997-05-27 2000-05-16 Fitzgerald; Patrick John Hydraulic powered rotary scrubbing brush for swimming pools
WO2006070333A1 (en) * 2004-12-27 2006-07-06 Arcelik Anonim Sirketi A vacuum cleaner
US20070079743A1 (en) * 2005-10-11 2007-04-12 Lone Oak Investments Limited Apparatus for cleaning the hull of a floating vessel
US20070261193A1 (en) * 2003-09-17 2007-11-15 The Hoover Company Brush assembly for a cleaning device
CN102525339A (zh) * 2010-12-14 2012-07-04 戴森技术有限公司 清洁头
CN102551601A (zh) * 2010-12-14 2012-07-11 戴森技术有限公司 清洁头
US20130067682A1 (en) * 2009-10-30 2013-03-21 Atsushi Morishita Rotary cleaning body unit, suction port body and electric vacuum cleaner

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8416973U1 (de) * 1984-06-02 1984-10-04 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal Vorsatzduese mit rotierender buerste fuer staubsauger
US5867864A (en) * 1997-05-02 1999-02-09 The Hoover Company Hand held turbine powered extractor nozzle
GB2352164B (en) * 1999-07-21 2002-07-17 Rosemary Jane Jones A rotary buffing accessory for attachment to the suction hose of a vacuum cleaner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US634813A (en) * 1898-11-18 1899-10-10 John L Gans Scrubbing-brush.
US1497921A (en) * 1921-01-26 1924-06-17 Independent Pneumatic Tool Co Rotary brush
US2000930A (en) * 1934-02-17 1935-05-14 Nagy Bela De Air motor
US2000931A (en) * 1934-03-24 1935-05-14 Nagy Bela De Alternating action polishing machine
US3122765A (en) * 1962-05-04 1964-03-03 Preco Inc Centrifugal speed regulator for a surface working device
US3503089A (en) * 1968-10-02 1970-03-31 Clara L Coneway Corner brush

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US634813A (en) * 1898-11-18 1899-10-10 John L Gans Scrubbing-brush.
US1497921A (en) * 1921-01-26 1924-06-17 Independent Pneumatic Tool Co Rotary brush
US2000930A (en) * 1934-02-17 1935-05-14 Nagy Bela De Air motor
US2000931A (en) * 1934-03-24 1935-05-14 Nagy Bela De Alternating action polishing machine
US3122765A (en) * 1962-05-04 1964-03-03 Preco Inc Centrifugal speed regulator for a surface working device
US3503089A (en) * 1968-10-02 1970-03-31 Clara L Coneway Corner brush

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148110A (en) * 1975-03-02 1979-04-10 Moen Asbjoern Rotating scraping or abrading tool
US4538322A (en) * 1984-02-23 1985-09-03 Vorwerk & Co. Interholding Gmbh Attachment nozzle for a vacuum cleaning system
US4554702A (en) * 1984-08-10 1985-11-26 The Scott & Fetzer Company Vacuum driven tool
US4589161A (en) * 1984-08-10 1986-05-20 The Scott & Fetzer Company Vacuum driven tool
US4586210A (en) * 1985-03-11 1986-05-06 Mueller John L Rotation brush mechanism with speed control governor
US4686729A (en) * 1985-05-23 1987-08-18 Claber S.P.A. Washing brush with water supply and rotating bristles especially for motor vehicles
AU582715B2 (en) * 1985-08-09 1989-04-06 Scott Fetzer Company, The Pneumatic pump and turbine motor set
US4733532A (en) * 1985-08-09 1988-03-29 The Scott Fetzer Company Fluid power train for small appliances
US4692956A (en) * 1985-12-31 1987-09-15 Kassis Amin I Pool vacuum
US5044034A (en) * 1990-10-29 1991-09-03 Iannucci Anthony A Swimming pool vacuum cleaner with rotary brush
US6061860A (en) * 1997-05-27 2000-05-16 Fitzgerald; Patrick John Hydraulic powered rotary scrubbing brush for swimming pools
US20070261193A1 (en) * 2003-09-17 2007-11-15 The Hoover Company Brush assembly for a cleaning device
WO2006070333A1 (en) * 2004-12-27 2006-07-06 Arcelik Anonim Sirketi A vacuum cleaner
US20070079743A1 (en) * 2005-10-11 2007-04-12 Lone Oak Investments Limited Apparatus for cleaning the hull of a floating vessel
US20130067682A1 (en) * 2009-10-30 2013-03-21 Atsushi Morishita Rotary cleaning body unit, suction port body and electric vacuum cleaner
CN102525339A (zh) * 2010-12-14 2012-07-04 戴森技术有限公司 清洁头
CN102551601A (zh) * 2010-12-14 2012-07-11 戴森技术有限公司 清洁头
CN102525339B (zh) * 2010-12-14 2015-08-19 戴森技术有限公司 清洁头
CN102551601B (zh) * 2010-12-14 2015-09-30 戴森技术有限公司 清洁头

Also Published As

Publication number Publication date
FR2248011B1 (ja) 1977-05-27
GB1445160A (en) 1976-08-04
NL171858B (nl) 1983-01-03
BE805274A (fr) 1974-01-16
IT994849B (it) 1975-10-20
ES419989A1 (es) 1976-03-16
ATA589774A (de) 1975-12-15
JPS4995464A (ja) 1974-09-10
AT326602B (de) 1975-12-29
DK137308B (de) 1978-02-20
CH562602A5 (ja) 1975-06-13
SE385435B (en) 1976-07-05
DK137308C (da) 1978-07-24
AT331756B (de) 1976-08-25
NL7314213A (ja) 1974-05-01
NL171858C (nl) 1983-06-01
FR2248011A1 (ja) 1975-05-16
ATA906373A (de) 1975-03-15
DE2252493B2 (de) 1975-07-17
DE2252493A1 (de) 1974-05-09

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