US3501798A - Electric polisher for smooth vertical walls,such as window glass - Google Patents

Electric polisher for smooth vertical walls,such as window glass Download PDF

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US3501798A
US3501798A US3501798DA US3501798A US 3501798 A US3501798 A US 3501798A US 3501798D A US3501798D A US 3501798DA US 3501798 A US3501798 A US 3501798A
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polisher
electric
window glass
vertical
shaft
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Ennio Carraro
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Ennio Carraro
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L1/00Cleaning windows
    • A47L1/02Power-driven machines or devices
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L1/00Cleaning windows
    • A47L1/02Power-driven machines or devices
    • A47L1/05Hand apparatus with built-in electric motors
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/02Floor surfacing or polishing machines
    • A47L11/10Floor surfacing or polishing machines motor-driven
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036Parts or details of the surface treating tools
    • A47L11/4038Disk shaped surface treating tools
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4063Driving means; Transmission means therefor
    • A47L11/4069Driving or transmission means for the cleaning tools
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4077Skirts or splash guards
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/408Means for supplying cleaning or surface treating agents
    • A47L11/4088Supply pumps; Spraying devices; Supply conduits

Description

March 24, 1970 E. CARRARO 7 3,501,798

ELECTRIC POLISHE OR SMOOTH VERTICAL WALLS, SUCH wmnow GLASS Filed pril 9. 1968 s Sheets-Sheet 1 6 g P 3%?91 r a March 24, 1970 E. CARRARO 3,501,798

.SUCH

5 Sheets-Sheet 2 ELECTRIC POLISHER FOR SMOOTH VERTICAL WALLS,

AS WINDOW GLASS Filed April 9, 1968 March 24, 1970 E. CARR/ARC 3,501,798

ELECTRIC POLISHER FOR SMOOTH VERTICAL WALLS, SUCH AS WINDOW GLASS Filed April 9, 1968 3 Sheets-Sheet 3 3 no 2 z 4 25 103 United States Patent 3,501,798 ELECTRIC POLISHER FOR SMOOTH VERTICAL WALLS, SUCH AS WINDOW GLASS Ennio Carraro, Via Roma 305,

. 30038 Spinea, Venice, Italy Filed Apr. 9, 1968, Ser. No. 719,946 Claims priority, applicatilo/n6 Italy, Apr. 15, 1967,

Int. Cl. A471 7/02, 1 /02; A46b 13/04 US. Cl. 15-320 9 Claims ABSTRACT OF THE DISCLOSURE This invention relates to an electric window glass polisher i.e. an appliance which is particularly useful for cleaning and polishing smooth plane surfaces, and particularly vertical surfaces, such as window glass.

The object of the invention is to provide a light-weight electric polisher of smooth vertical surfaces provided with a hood and a peripheral yieldable skirt tightly adhering against the surfaces to be polished. Said polisher, which will be briefly called window glass polisher is a light-weight polisher adapted to be readily shifted along plane vertical glass surfaces to be cleaned and polished by the combined action of rotating brushes and of a cleansing liquid, means being provided for spraying the liquid against the walls to be polished, preventing its downfiowing, removing the sprayed liquid from the cleaned wall, whirling same in the air enclosed under said hod and sucking such polluted air, if necessary after having comminuted the liquid droplets and subjected same to the action of a heater for transforming the liquid into vapor, before discharging same outside of the apparatus by blowing same off through an outlet opening of said hood.

The invention will be better understood from the following specification of a preferred embodiment of the apparatus, which will be described with reference to the accompanying drawings, in which:

FIGURE 1 is a diagrammatical top plan view with parts in section of a window glass polisher according to the invention;

FIGURE 2 is a top plan view of the same polisher, without cover or hood;

FIGURE 3 is a vertical section on line IIIIII of FIGURE 1;

FIGURE 4 is a vertical section on line IV-IV of FIGURE 1;

FIGURE 5 is a horizontal section on line VV of FIGURE 4;

FIGURE 6 is an enlarged section through the lower brushing and packing skirt;

FIGURE 7 is a vertical section through one of the rotating brushes and FIGURE 8 is a perspective view of one of the brushes, dismounted from the apparatus.

The window glass polisher as shown in the drawings comprises a casing 1 composed of a base plate 2 and hood or cover 3 fastened thereto. To said casing a tubular handle stick 4 is swingably fastened by means of its uCe forked ends 5 to two side pivots 6 mounted onto the hood 3 (see FIG. 1). Stick 4 is preferably composed of a plurality of tubular sections fastened together.

The casing 1 is provided at its outer edge with a projecting elastically yielding striping and packing skirt 7 which extends along the whole periphery of the casing and is composed of an outer felt brim or lap 107 and of an inner layer of brush filaments 207 (see FIG. 6). Said packing skirt 7 is clamped between two superposed border sections 103 and 103 of the hood 3.

In the base plate 2 five shafts 8, 9, 10, 11 and 12 are rotatably mounted so as to project downwardly and carry at their projecting ends each a substantially cylindrical brush 13. Said shafts are rotated by an electric motor 14 which through a speed-down gear 15, 16 drives the central brush shaft 8 onto which two superposed pulleys 108 and 208 are keyed which through a pair of driving belts 17 and 18 drive each a pair of pulleys 109-110 and 111- .112 fastened onto the brush-carrying shafts 9-10 and 11-12.

Upon the central shaft 8 there is mounted the blade rotor 19 of a suction fan 20, the outlet of which is connected to an opening 21 in the hood and it thus open to the outer air. The suction side of said suction fan 20 is connected through a pair of suction ducts 22 with a pair of suction openings 23 provided in the base plate 2. In each duct 2 a drop breaking strainer 24 and an adjoining electric resistance 25 are mounted.

Within the casing 1 a tank 45 for a cleansing liquid is mounted, which through a suction duct 26 is connected with a compressed-air spray nozzle 27 mounted onto the lower side of plate 2. Said cleansing liquid may be filled into the tank through a cap-closed neck 28. Upon brush shaft 10 and above the pulley an air blower 29 is mounted, the casing 129 of which is fastened to the base plate 2 by means of a stirrup 30, while the rotor 229 is fastened to an upper extension of shaft 10. The pressure side of pump 29 is connected to nozzle 27 through duct 31 and is connected by means of a branch hose 32 with a pressure air outlet 33 provided in the stick 4, as clearly shown in FIGURES 1 and 2.

Brushes 13 are dismountably fastened to the ends of brush shafts 8-12. For this purpose said brushes are mounted in a holder 34 provided with a hub 35 provided with a recess having a non-circular cross section (in prac tice, the recess has two opposite flat walls) which is fitted onto a correspondingly shaped end 37 of the brush shaft 8 (see FIGURES 7 and 8). The brush holder 34 is also provided with a pair of diametrically opposite snap teeth 36 which, when the brush holder 34 is fitted onto its shaft, snap into a peripheral groove 38 of the shaft and thus prevent any axial slipping of the brushes. The teeth, however, have rounded ridges, so that they can come out of groove 38, when an adequate pull is exerted on the brush holder 34. The end of shaft 8 is frusto-oonical for rendering the fitting of the burst holder easy and for centering purposes. I

The electric wires 39 which feed the motor 14 and the electric heating resistances 25 pass through one of the fork arms of the stick and lead to a switch 40 on the stick 4.

In operation, the glass polisher, which is constructed very light, is pressed against the glass to be cleaned and polished, as shown in FIGURE 4, so that the peripheral skirt 7 and the brushes 13 tightly adhere on the glass and with the motor 14 on, the appliance is guided along the window glasses to be cleaned and at the same time the cleansing liquid from tank 45 is sprayed against the glass surface from time to time, under the control of the operator. Thus, due to the provision of the peripheral felt skirt 7 reinforced by a row of brush filaments, a closed chamher is formed under the hood. It is to be noted that an air outlet 33, FIG. 1, is provided on the stick. When this outlet is open, the air under pressure generated by the constantly operated air blower 29 is blown off through branch duct 32 and outlet 33 in the open air and no liquid is pumped from tank 45. Whenever is desired to spray some liquid against the glass walls, the operator closes the air outlet 33 with a finger and thus the whole compressed air generated by the blower is pumped through duct 31 and spray nozzle 27 and the cleansing liquid is sucked from the tank and sprayed against the window glass 41 or like smooth wall.

It is to be noted that, due to the provision of the peripheral felt skirt 7, when this adheres against a flat smooth surface, also due to the pressure of the outside air while the interior is under suction of suction pump 20, a closed chamber is formed under the hood 3, so that the spray liquid is prevented from flowing out along the glass walls. At the same time the cleansing liquid whirled into the air under the hood by the rotating brushes is sucked by the suction fan 20 through openings 22 and is discharged into the open air through outlet 21, FIG. 1. On its way to this outlet, the droplets in the air pass in proximity of the electric heatin g resistances 25 fitted within ducts 22 and thus the whole liquid is vaporized, whereby the larger droplets are comminuted by passing through wire netting 24 before being vaporized by the heat. In this manner liquid is prevented from accumulating under the hood 3.

I claim:

1. Electric cleaner and polisher having an operating stick, particularly for polishing smooth walls, such as window glass and the like, comprising a plate, a hood having an opening at its top, fastened above said plate and provided with a circumferential skirt of felt and brush filaments extending downwardly beyond said plate and adapted to adhere with a tight fit against the smooth walls; an electric motor provided with a motor shaft under said hood; a central vertical shaft; a step-down gear connecting said motor shaft to said central vertical shaft; a plurality of peripheral vertical shafts around said central vertical shaft; a rotary brush mounted to each vertical shaft, beneath said plate; means on said central shaft for driving each of said peripheral shafts; a suction fan under said top opening of the hood and discharging therethrough polluted air from below the hood; means for driving said suction fan from said motor shaft; a blower; means for driving said blower from one of the peripheral vertical shafts; a liquid tank; at least one spray nozzle under said plate; means connected to the blower for conveying the liquid from said tank to said spray nozzle and for spraying same against the surface to be polished, and ducts connected to the suction side of said fan and means in said ducts for comminuting and vaporizing liquid particles whirled around in the air under the hood by the combined action of said rotating brushes and of said suction fan, which thereafter sucks and ejects the air containing the vaporized cleansing liquid through said outlet opening at the hood top.

2. An electric polisher for smooth vertical walls according to claim 1, by which the said step-down gear is a worm and worm wheel gear.

3. An electric polisher for smooth vertical walls according to claim 1 by which said central vertical shaft is provided with superposed belt pulleys and said peripheral vertical shafts are provided with belt pulleys at the height of either belt pulley of said central shaft, and a transmission belt drivingly connecting one of the pulleys on the central vertical shaft with one pulley on at least one of the peripheral shafts.

4. An electric polisher for smooth vertical walls according to claim 1 by which said central vertical shaft is provided with superposed belt pulleys and said peripheral vertical shafts are provided with belt pulleys at the height of either belt pulley of said central shaft, and a transmission belt drivingly connecting one of the pulleys on the central vertical shaft with two parallel pulleys on two peripheral vertical shafts.

5. An electric polisher for smooth vertical walls according to claim 1, by which the said suction fan is mounted directly upon one of the vertical shafts.

6. An electric polisher for smooth vertical walls according to claim 1, by which the said suction fan is mounted directly upon one of the vertical shafts and the said blower is mounted directly upon another vertical shaft.

7. An electric polisher for smooth vertical walls according to claim 1, by which the said suction fan is mounted directly upon one of the vertical shafts and the said blower is mounted directly upon another vertical shaft; a duct connected to the pressure side of said blower; a branch of said duct opening to the exterior in the operating stick, so that said opening may be closed by means of a finger the other branch being connected to said spray nozzle and a duct for feeding a cleansing liquid to said spray nozzle.

8. An electric polisher according to claim 1 in which the means in said ducts for comminuting and vaporizing the droplets suspended in the air comprise a wire net strainer and an electric heating resistance in proximity to said strainer.

9. An electric polisher according to claim 1, in which the lower ends of said vertical shafts project below said plate and are provided with a groove and non-circular ends, while the brushes are provided with hubs having correspondingly non-circular recesses and snapping means permitting detachable fastening said brushes under said shafts.

References Cited FOREIGN PATENTS 5/1933 Great Britain. 1/1913 France.

ROBERT W. MICHELL, Primary Examiner

US3501798D 1967-04-15 1968-04-09 Electric polisher for smooth vertical walls,such as window glass Expired - Lifetime US3501798A (en)

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AT (1) AT284384B (en)
CH (1) CH491637A (en)
DE (1) DE1703172B2 (en)
FR (1) FR1577372A (en)
GB (1) GB1202316A (en)

Cited By (49)

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Publication number Priority date Publication date Assignee Title
US4236269A (en) * 1979-05-02 1980-12-02 Clarke-Gravely Corporation Vertical axis brush
US4881288A (en) * 1988-07-13 1989-11-21 Tennant Trend Inc. Center feed dispenser for cleaning solution
US4885815A (en) * 1987-09-18 1989-12-12 Smith Neville J Powered cleaning tools
US20050109692A1 (en) * 1998-09-25 2005-05-26 Fufang Zha Apparatus and method for cleaning membrane filtration modules
US20060000774A1 (en) * 2002-10-10 2006-01-05 Johnson Warren T Backwash method
US20060000775A1 (en) * 1996-12-20 2006-01-05 U.S. Filter Wastewater Group, Inc. Scouring method
US20070007205A1 (en) * 2003-08-29 2007-01-11 Johnson Warren T Backwash
US20070075021A1 (en) * 2003-11-14 2007-04-05 U.S. Filter Wastewater Group, Inc. Module cleaning method
US20070181496A1 (en) * 2004-03-26 2007-08-09 Zuback Joseph E Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
US20070227973A1 (en) * 2004-09-07 2007-10-04 Fufang Zha Reduction of Backwash liquid Waste
US20080053923A1 (en) * 2004-09-14 2008-03-06 Siemens Water Technologies Corp. Methods And Apparatus For Removing Solids From A Membrane Module
US20080093297A1 (en) * 2005-01-14 2008-04-24 Gock Kenneth W Filtration System
US20080156745A1 (en) * 2004-09-15 2008-07-03 U.S. Filter Wastewater Group, Inc. Continuously Variable Aeration
US20080190846A1 (en) * 2005-08-22 2008-08-14 David John Cox Assembly for Water Filtration Using a Tube Manifold to Minimise Backwash
US20080203017A1 (en) * 2005-04-29 2008-08-28 Siemens Water Technologies Corp A Corporation Chemical Clean For Membrane Filter
US20080203016A1 (en) * 2004-12-24 2008-08-28 Siemens Water Technologies Corp. Cleaning in Membrane Filtration Systems
US20080257822A1 (en) * 2005-12-09 2008-10-23 Warren Thomas Johnson Reduced Backwash Volume Process
US20090001018A1 (en) * 2006-01-12 2009-01-01 Fufang Zha Operating Strategies in Filtration Processes
US7530136B1 (en) * 2008-04-21 2009-05-12 Ball Christopher E Power window washer
US20090223895A1 (en) * 2001-08-09 2009-09-10 Siemens Water Technologies Corp. Method of cleaning membrane modules
US20090255873A1 (en) * 2006-08-31 2009-10-15 Bruce Gregory Biltoft Low pressure backwash
US20100000941A1 (en) * 2004-12-24 2010-01-07 Siemens Water Technologies Corp. Simple gas scouring method and apparatus
US20100012585A1 (en) * 2007-02-16 2010-01-21 Fufang Zha Membrane filtration process and design
US20100051545A1 (en) * 2007-04-04 2010-03-04 Warren Thomas Johnson Membrane module protection
US20100170847A1 (en) * 2007-05-29 2010-07-08 Fufang Zha Membrane cleaning using an airlift pump
US20100191377A1 (en) * 2006-10-24 2010-07-29 Smith George W Infiltration/inflow control for membrane bioreactor
US20100200503A1 (en) * 2007-06-28 2010-08-12 Fufang Zha Cleaning method for simple filtration systems
US20100300968A1 (en) * 2009-06-02 2010-12-02 Siemens Water Technologies Corp. Membrane cleaning with pulsed gas slugs
US20100326906A1 (en) * 2007-04-02 2010-12-30 Barnes Dennis J infiltration/inflow control for membrane bioreactor
US20110056522A1 (en) * 2009-06-11 2011-03-10 Peter Zauner Method of cleaning membranes
US20110100907A1 (en) * 2007-05-29 2011-05-05 Siemens Water Technologies Corp. Membrane cleaning with pulsed arilift pump
US20110127209A1 (en) * 2008-07-24 2011-06-02 Siemens Water Technologies Corp. Frame System for Membrane Filtration Modules
US20110132826A1 (en) * 2008-08-14 2011-06-09 Siemens Water Technologies Corp. Block Configuration for Large Scale Membrane Distillation
US20110139715A1 (en) * 2008-08-20 2011-06-16 Siemens Water Technologies Corp. Membrane System Backwash Energy Efficiency
US20110192783A1 (en) * 2001-04-04 2011-08-11 Siemens Industry, Inc. Potting Method
US8182687B2 (en) 2002-06-18 2012-05-22 Siemens Industry, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
US20140237743A1 (en) * 2013-02-27 2014-08-28 Tennant Company Cleaning head assemblies having touch-free attachment and alignment technology
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9340184B1 (en) * 2014-10-23 2016-05-17 Patrick Morris Motorized car wash device
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US10251524B2 (en) 2013-02-27 2019-04-09 Tennant Company Cleaning head assemblies having touch-free attachment and alignment technology
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system

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GB392538A (en) * 1931-11-16 1933-05-16 Charles Henry Wagland Improvements in and relating to cleaning appliances for windows and like surfaces

Cited By (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236269A (en) * 1979-05-02 1980-12-02 Clarke-Gravely Corporation Vertical axis brush
US4885815A (en) * 1987-09-18 1989-12-12 Smith Neville J Powered cleaning tools
US4881288A (en) * 1988-07-13 1989-11-21 Tennant Trend Inc. Center feed dispenser for cleaning solution
US8048306B2 (en) 1996-12-20 2011-11-01 Siemens Industry, Inc. Scouring method
US20060000775A1 (en) * 1996-12-20 2006-01-05 U.S. Filter Wastewater Group, Inc. Scouring method
US20060131234A1 (en) * 1996-12-20 2006-06-22 U.S. Filter Wastewater Group, Inc. Scouring method
US20050109692A1 (en) * 1998-09-25 2005-05-26 Fufang Zha Apparatus and method for cleaning membrane filtration modules
US8518256B2 (en) 2001-04-04 2013-08-27 Siemens Industry, Inc. Membrane module
US20110192783A1 (en) * 2001-04-04 2011-08-11 Siemens Industry, Inc. Potting Method
US8512568B2 (en) 2001-08-09 2013-08-20 Siemens Industry, Inc. Method of cleaning membrane modules
US20090223895A1 (en) * 2001-08-09 2009-09-10 Siemens Water Technologies Corp. Method of cleaning membrane modules
US8182687B2 (en) 2002-06-18 2012-05-22 Siemens Industry, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
US7938966B2 (en) 2002-10-10 2011-05-10 Siemens Water Technologies Corp. Backwash method
US20060000774A1 (en) * 2002-10-10 2006-01-05 Johnson Warren T Backwash method
US20070007205A1 (en) * 2003-08-29 2007-01-11 Johnson Warren T Backwash
US8268176B2 (en) 2003-08-29 2012-09-18 Siemens Industry, Inc. Backwash
US20070075021A1 (en) * 2003-11-14 2007-04-05 U.S. Filter Wastewater Group, Inc. Module cleaning method
US8808540B2 (en) 2003-11-14 2014-08-19 Evoqua Water Technologies Llc Module cleaning method
US20070181496A1 (en) * 2004-03-26 2007-08-09 Zuback Joseph E Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
US8758621B2 (en) 2004-03-26 2014-06-24 Evoqua Water Technologies Llc Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
US8790515B2 (en) 2004-09-07 2014-07-29 Evoqua Water Technologies Llc Reduction of backwash liquid waste
US20070227973A1 (en) * 2004-09-07 2007-10-04 Fufang Zha Reduction of Backwash liquid Waste
US20080053923A1 (en) * 2004-09-14 2008-03-06 Siemens Water Technologies Corp. Methods And Apparatus For Removing Solids From A Membrane Module
US8506806B2 (en) 2004-09-14 2013-08-13 Siemens Industry, Inc. Methods and apparatus for removing solids from a membrane module
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
US20080156745A1 (en) * 2004-09-15 2008-07-03 U.S. Filter Wastewater Group, Inc. Continuously Variable Aeration
US20080203016A1 (en) * 2004-12-24 2008-08-28 Siemens Water Technologies Corp. Cleaning in Membrane Filtration Systems
US20100000941A1 (en) * 2004-12-24 2010-01-07 Siemens Water Technologies Corp. Simple gas scouring method and apparatus
US20110114557A2 (en) * 2004-12-24 2011-05-19 Warren Johnson Cleaning in membrane filtration systems
US8496828B2 (en) 2004-12-24 2013-07-30 Siemens Industry, Inc. Cleaning in membrane filtration systems
US8758622B2 (en) 2004-12-24 2014-06-24 Evoqua Water Technologies Llc Simple gas scouring method and apparatus
US20080093297A1 (en) * 2005-01-14 2008-04-24 Gock Kenneth W Filtration System
US20080203017A1 (en) * 2005-04-29 2008-08-28 Siemens Water Technologies Corp A Corporation Chemical Clean For Membrane Filter
US9675938B2 (en) 2005-04-29 2017-06-13 Evoqua Water Technologies Llc Chemical clean for membrane filter
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Also Published As

Publication number Publication date
GB1202316A (en) 1970-08-12
FR1577372A (en) 1969-08-08
AT284384B (en) 1970-09-10
CH491637A (en) 1970-06-15
DE1703172B2 (en) 1975-09-11
DE1703172A1 (en) 1972-01-27

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