Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2680260 A
Publication typeGrant
Publication dateJun 8, 1954
Filing dateAug 6, 1947
Priority dateAug 6, 1947
Publication numberUS 2680260 A, US 2680260A, US-A-2680260, US2680260 A, US2680260A
InventorsHenning Sundin, Johan Danielsson Nils
Original AssigneeHenning Sundin, Johan Danielsson Nils
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Scrubbing machine with rotating brush for scrubbing surfaces
US 2680260 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)




y HENNING SUNDIN ATTORNEY Patented June 8, 1954 NE WITH ROTATING BRUSH FOR SCRUBBING SURFACES Nils Johan Danielsson, Motala, Sweden, and Henning Sundin, Addis Ababa, Abyssinia Application August 6, 1947, Serial No. 766,496


This invention relates to scrubbing machines, and more particularly to a scrubbing machine of the type in which a cleaning liquid, for instance clean water or soapy water, is supplied to the surface to be scrubbed, and the scrubbing is effected by means of a rotating brush.

One object of the invention is to improve the removal of the used water from the scrubbed surface and to prevent leaving a portion of the Water on said surface.

Another object is to provide a good contact of the scrubbing brush with the surface to be scrubbed.

Other objects will be in part obvious and in part pointed out hereinafter.

A scrubbing machine according to the invention comprises a casing, a liquid tank, a rotatable brush, means for rotating said brush, means for supplying liquid from said tank to the surface to be scrubbed, a mouth-piece facing the periphery of said brush in close proximity thereof and formed so as to collect the liquid hurled by said brush, and suction means connected to said mouth-piece.

For a better understanding of the invention, reference is had to the following description taken in connection with the accompanying drawing, in which:

Fig. 1 is a vertical section through one form of the improved scrubbing machine; Fig. 2 is a side elevation thereof; Fig. 3 is a vertical section through another form of the scrubbing machine according to the invention; Fig. 4 is a fragmentary section through the plane 4-4 in Fig. 3 showing the connection of a suction pipe to the mouth-piece; Fig. 5 is a fragmentary detail in section showing a modified form of the arrangement'of the rotatable brush; Fig. 6 is another fragmentary detail in section showing the combination of a vacuum cleaner pipe with the mouth-piece of the scrubbing machine, and Fig. 7 is a fragmentary vertical section showing a .modified arrangement of the rotatable brush and a correspondingly modified form of the mouthpiece.

Referring now more particularly to Figs. 1' and 2, the scrubbing machine there represented comprises a casing l5 mounted on wheels I4 and adapted to be pushed along the surface to be scrubbed by means of a bifurcated handle it fixed to the casing [5. A horizontal partition l1 divides the casing into an upper compartment 2 serving as liquid tank and into a lower compartment containing a rotatable brush 5, a centrifugal pump 4, an electromotor .6, and gears 1 for driving the brush and the pump by the motor.

The brush 5 is surrounded by a circular mouthpiece |0 facing the periphery of the brush in close proximity thereof and serving tocollect liquid outwardly hurled by the brush. To this end, the lower portion of the mouth-piece has an internal peripheral groove and ends in an inwardly turned ring the sharp edge of which is springy in vertical direction and adapted to engage the surface to be scrubbed at an acute angle. In order to secure an intimate contact between the mouth-piece and the surface to be scrubbed, the mouth-piece is preferably made of an elastic material such as rubber, and is supported in the lower end of the casing l5 by springs 9 so as to be vertically movable in said casing.

Pipes H connect one side of the pump 4 with various points of the groove formed by mouthpiece ID and a pipe 3 connects the other side of the pump with the upper portion of the tank 2 which is separated from its lower portion by a filter l and covered by a removable lid l8. In the bottom I! of the tank 2 there is a valve '44 the opening of which communicates with a pipe 8 which leads to the center portion of the brush 5. The valve can be operated by a handle 13 on the top of the casing I5. The tank 2 can be drained by means of a tap l2 provided in the casing l5 near the bottom of the tank. 7

In operation of the scrubbing machine, the lid I8 is removed and water containing a cleansing compound or solution is filled into the tank 2. Then the lid is put on again, the valve 44 is opened and the motor 6 is started for rotating the brush 5 and driving the pump 4. The machine is now pushed by the handle 16 over a surface to be scrubbed and cleansing solution will flow through the opening of valve 44, the pipe 8 and the center portion of the brush 5 to the surface to be scrubbed. As the cleansing solution is thrown outwardly by the rotating brush, it will be collected by the groove of mouth-piece I 0 surrounding the brush and directed thereby to the pipes l I, thus returning through the pump 4, the pipe 3 and the filter I to the tank 2, whereupon it may be used again.

The scrubbing machine shown in Fig. 3 is generally similar to that of Fig. 1, and corresponding parts thereof are designated by the same reference characters though primed. In this modification, there is a separate liquid tank 2' within the casing l5, and the motor 6 is arranged beside the tank. The tank has a conical bottom l7 and the tap l2 communicates with the lowest point of this bottom, thus facilitating the discharge of the tank. The valve 44' for supplying cleansing liquid from the tank to the surface to be scrubbed is in the side wall of the tank and can be operated by a handle 13' arranged at the side of the casing [5.

The rotary brush 5 is fixed to a rotary pipe 36 forming a center shaft of the brush and communicatin with a stationary pipe 8 connected to the valve 44'. The pipe 30 is rotatable in a ball-bearing 41 arranged in a plate 26 which is vertically movable in the lowest portion of the casing l5 and is pressed downwards by springs 9' bearing against a support 4| attached to the casing l5. In order to protect the ball-bearing 41 from the liquid thrown by the brush, a packing 29 is provided between the plate 26 and the rotary pipe 30. The mouth-piece III is attached to the plate 26 and is in so close proximity of the brush 5' that the periphery thereof touches the sharp edge of the lower portion of the mouthpiece, which is again provided with an internal peripheral groove and a comparatively sharp contact edge thus throwing the liquid particles from the scrubbed surface right into the groove of the mouth-piece.

The pump 4 is here coaxial with the motor 6' and is preferably of a type adapted to suck air as well as liquid. The shaft of the pump supports cog wheel 1' meshing with a second cog wheel 28 fixed to the rotary pipe 39 for rotating the brush 5. The height of the cog wheel 1 is substantially larger than that of the cog wheel 23 so that these wheels remain in meshin position, even when the plate 26 moves upwards or downwards.

The mouth-piece I0. is connected with the suction side of the pump 4' by on or more suction pipes ll. As shown in Fig. 4, the end portion 3| of these pipes communicating with the mouth-piece is preferably arranged so that the inlet opening of each pipe faces the liquid drops hurled by the brush in the direction of the arrow 32. This means that the aforesaid end portion of the pipes H is substantially tangential to the circular opening of the groove of the mouth-piece.

As it is possible that due to some unevenness of the surface to, be scrubbed, in spite of the advantageous configuration and position of the mouth-piece l, liquid particles may be thrown by the brush beyond the mouth-piece, a circular absorbing filter 23 is fitted in the underside of the mouth-piece. In order to improve the efiect of this filter, it is advantageous to arrange this filter in a circular groove 24, and to connect this groove to the suction side of the pump 4 by means of suction pipes 25.

A pipe 3' connects the pressure side of pump 4' with the portion of the tank 2' situated above the filter I. In order to prevent the development of an air pressure in the tank 2 which would impair the suckin effect of the pump 4, an air outlet I9 is provided in the cover of the tank. A baffle 20 is arranged beneath this air outlet.

The tank can be filled with liquid through an I opening in its cover which opening can be closed by a plug 2i. A pipe 46 connecting the pump 4' with the tank 2' and closable by a valve 45 having a handle 21 serves to supply starting liquid to the pump.

The operation of the machine shown in Fig. 3 is generally similar to that of the machine illustrated in Figs. 1 and 2;. Of course, prior to the starting of the motor not only the valve, 44 but. also. the valve 45 has tobe opened.

According to the arrangement of Fig. 5, the adjustability of brush 5 relative to casing I5 is further increased by mounting the brush axially slidable on the lower portion of pipe The brush is biased downwardly by a spring 34 abutting against the plate 26 and a bearing 33 secured to brush 5".

If so desired, the scrubbin machine can be combined with a vacuum cleaner, by arranging a vacuum cleaner nozzle near the outer periphery of the mouth-piece, as shown in Fig. 6. This nozzle can be connected, by means of a pipe 35, to the pump G or to a separate air suction pump, not shown.

Fig. '7 shows a modification of the scrubbing machine in which the horizontally rotatable brush is replaced by a cylindrical brush 38 rotatable jointly with a horizontal axle 39 in the direction of the arrow 33. A straight internally grooved mouth-piece ii) is arranged on the side of the brush to which the brush hurls the liquid from the surface scrubbed by it. Otherwise, the configuration and the position of the mouthpiece with respect to the brush are the same as described in connection with the machines shown in Figs. 1 to 3. The mouth-piece i0" is held in position, and partly formed, by a semi-cylindrical case Ml surrounding the upper portion of the brush and supported in the casing l5 by springs 9 bearing against supports M While there have been described whatare at present considered to be the preferred embodiments of the invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention, and it is, therefore, aimed in the appended claims to cover all such changes and modifications as fall within the true spirit and scope of the invention.

What is claimed is:

1. A scrubbing machine for scrubbing surfaces comprising a casing, a tank for liquid mounted within said casing, conduit means for supplying liquid from said tank to the surface to be scrubbed, a circular brush rotatable about a vertical axis and means for rotating said brush disposed within said casing, the said brush having a portion protruding outwardly from the easing for engagement with the surface to be scrubbed, a circular mouth-piece made of elastic material facing the periphery of said brush in close proximity thereto and having an internal peripheral groove formed so as to collect the liquid thrown off by said brush, said groove forming in the mouth-piece an inwardly turned ring adapted to engage the surface to be scrubbed at an acute angle relative to the said surface and to touch the latter with a comparatively sharp edge springy in vertical direction, absorbing filter means supported by the mouth-piece so as to extend from the side of the mouth-piece facing the surface to be scrubbed, a plate vertically movable in said casing and supporting said mouthpiece, springs yieldably supporting said plate in said casing, and suction means communicating with said groove in said mouth-piece,

2. A scrubbin machine as defined in claim 1, wherein said mouth-piece is formed with an annular groove in its bottom face, and wherein said absorbing filter means are fitted in said annular groove protruding therefrom for engagement with the surface to be scrubbed.

3. A scrubbing machine as defined in claim 2, in which said suction means comprises pump 5 means having a pressure side and a suction side and adapted to pump liquid and air, and conduit means connecting the pressure side of said pump means to said tank for liquid and the suction side to said grooves formed in the mouthpiece.

- References Cited in the filev of this patent UNITED STATES PATENTS Number Number :3 Name Date Onofrio Apr. 19, 1927 Deutscher Oct. 9, 1928 Johnston Mar. 31, 1931 Kuchinsky Sept. 1, 1931 Jerome Dec. 27, 1932 Nadig May 28, 1935 Stoddard Dec. 3, 1935 Simon Nov. 8, 1938 Nadig Dec. 3, 1940 Williamson June 3, 1941 Boccasile July 22, 1941

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1480662 *Sep 11, 1922Jan 15, 1924Caine Ansel MFountain scrubbing machine
US1625147 *Nov 21, 1924Apr 19, 1927Anastas OnofrioCombined scrubbing and vacuum-cleaning device
US1687283 *Jun 18, 1926Oct 9, 1928William DeutscherFloor cleaner
US1798327 *Aug 3, 1928Mar 31, 1931Johnston Edward AMechanical scrubber
US1821715 *Mar 15, 1929Sep 1, 1931Kuchinsky Matthew KSurface washing machine
US1892347 *Mar 19, 1930Dec 27, 1932Jerome Walter CFloor washing machine
US2003216 *Jul 17, 1934May 28, 1935Nadig Francis HFloor cleaning machine
US2023107 *Mar 19, 1928Dec 3, 1935Conover CompanyWashing machine
US2136324 *Sep 3, 1935Nov 8, 1938John Simon LouisApparatus for cleansing floors and like surfaces
US2223963 *Dec 10, 1938Dec 3, 1940Nadig Francis HFloor cleaning machine
US2243935 *May 4, 1940Jun 3, 1941Clarence Williamson JamesSuction head for vacuum cleaners
US2250177 *Nov 2, 1938Jul 22, 1941Boccasile NicholasFloor washing machine
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2774089 *Oct 15, 1954Dec 18, 1956Brown Lester HAutomatic floor mop
US2893037 *Jun 22, 1956Jul 7, 1959Strong Joy RFloor scrubbing appliance
US2923956 *Oct 26, 1956Feb 9, 1960 bixler
US2972155 *Nov 20, 1958Feb 21, 1961Signal Mfg CoFloor treating apparatus
US2999258 *Oct 24, 1958Sep 12, 1961Edward BerberianSurface-cleaning and rug-shampooing machines
US3046586 *Jul 18, 1960Jul 31, 1962Electrolux CorpRug scrubbing device
US3128581 *Apr 3, 1962Apr 14, 1964Tosetti AntonioFloor grinders
US3192547 *Oct 25, 1963Jul 6, 1965Hickernell George RScrubbing machine with cleaning attachment therefor
US3375540 *Jul 19, 1965Apr 2, 1968Elmer A. HydeAttachment for floor cleaning machine
US3531819 *Jan 24, 1968Oct 6, 1970Contract Cleaning Co Pty LtdCombined floor-polisher and suction cleaner
US3598446 *Jun 11, 1969Aug 10, 1971Concut IncPavement surfacing machine with vacuum water recovery system
US3608968 *Apr 3, 1969Sep 28, 1971Christensen Diamond Prod CoPavement cutting and water and cutting pickup apparatus
US3700849 *Feb 16, 1970Oct 24, 1972Edward A ZuzeloMultiple grooving of pavement
US4457036 *Sep 10, 1982Jul 3, 1984Tennant CompanyDebris collecting mechanism
US4510643 *May 2, 1983Apr 16, 1985Hisao KitadaVacuum floor polisher
US4845794 *Nov 10, 1988Jul 11, 1989Rotowash ScandinaviaApparatus for wet cleaning a floor or wall surface
US4930178 *Jul 17, 1985Jun 5, 1990Monson Clifford LCompact self-contained recycling extraction cleaner
US5077862 *Oct 31, 1990Jan 7, 1992Racine Industries, Inc.Carpet cleaning machine with edge-mounted vacuum nozzle
US5163203 *Sep 29, 1989Nov 17, 1992Ovidiu TanasescuApparatus for wet cleaning of floors
US5706549 *Jun 25, 1996Jan 13, 1998Advance Machine CompanyRotary disc floor cleaning apparatus
US5761764 *Oct 15, 1996Jun 9, 1998Racine Industries, Inc.Carpet cleaning machine with improved system for removing dirty material
US5781962 *Oct 15, 1996Jul 21, 1998Racine Industries, Inc.Carpet cleaning machine with maintenance-reducing features
US5974626 *Mar 26, 1997Nov 2, 1999Nilfisk-Advance, Inc.Collection system for a floor polishing machine
US6167587Jul 8, 1998Jan 2, 2001Bissell Homecare, Inc.Upright extraction cleaning machine
US6230362Feb 3, 2000May 15, 2001Bissell Homecare, Inc.Upright extraction cleaning machine
US6286181May 23, 2000Sep 11, 2001Bissell Homecare, Inc.Upright extraction cleaning machine
US6412141Jan 2, 2001Jul 2, 2002Bissell Homecare, Inc.Upright extraction cleaning machine
US6438793Jul 10, 2000Aug 27, 2002Bissell Homecare, Inc.Upright extraction cleaning machine
US6609269May 3, 2002Aug 26, 2003Bissell Homecare, Inc.Upright extraction cleaning machine with unitary accessory hose duct
USRE39304 *Jun 27, 2003Sep 26, 2006Bissell Homecare, Inc.Upright extraction cleaning machine
DE1282873B *Jul 12, 1962Nov 14, 1968Gerardus Van BrakelAn einer Fussbodenbearbeitungsmaschine befestigte, ringfoermige Buerste
DE1297299B *Dec 31, 1965Jun 12, 1969Siemens Elektrogeraete GmbhVorrichtung zum Nassreinigen ebener Flaechen
EP0185310A2 *Dec 11, 1985Jun 25, 1986Tennant CompanyFloor maintenance machine and method
EP0286328A1 *Mar 31, 1988Oct 12, 1988Rotowash Scandinavia ApsAn apparatus for wet cleaning a floor or wall surface
WO1990003757A1 *Sep 29, 1989Apr 19, 1990Ovidiu TanasescuApparatus for wet cleaning of floors
U.S. Classification15/50.1, 15/320, 15/245
International ClassificationA47L11/29, A47L11/30
Cooperative ClassificationA47L11/4052, A47L11/4088, A47L11/4044, A47L11/305, A47L11/4027, A47L11/4038
European ClassificationA47L11/40N6, A47L11/40F6, A47L11/40E, A47L11/40F2, A47L11/40G, A47L11/30B2