Method for cleaning surfaces

Abstract

A building cleaning system for cleaning a side of a building can include an elongate brush structure that is rotated by an electric motor, a frame for supporting the brush structure that can be oriented to face toward the side of the building, and a plurality of air moving devices mounted to the frame for generating counterforce to force the frame toward the building. The air moving devices can including fans or blowers. The air moving devices can be being spaced apart from one another in an orientation that extends along the length of the frame. A lift arrangement can be provided for moving the frame along the side of the building.

Claims

1. A building cleaning system for cleaning a side of a building, the building cleaning system comprising: an elongate brush structure that is rotated about a central longitudinal axis of the elongate brush structure by an electric motor, the elongate brush structure having a length that extends between first and second ends of the elongate brush structure; a frame for supporting the brush structure at a first side of the frame that can be oriented to face toward the side of the building the frame comprising: an upper horizontal member having a length that extends at least between the first and second ends of the elongate brush structure; a lower horizontal member, spaced vertically apart from the upper horizontal member, and having a length that extends at least between the first and second ends of the elongate brush structure; a first vertical support member, spanning between the upper horizontal member and the lower horizontal member; and a second vertical support member, horizontally spaced apart from the first vertical support member, and spanning between the upper horizontal member and the lower horizontal member, wherein the first end of the elongate brush structure is coupled to the first vertical support member and the second end of the elongate brush structure is coupled to the second vertical support member; an arcuate shield mounted to the frame, the arcuate shield extending from the upper horizontal member towards the lower horizontal member while curving around the central longitudinal axis of the elongate brush structure such that the central longitudinal axis of the elongate brush structure is an axis of curvature for the arcuate shield, the arcuate shield having an opening at the first side of the frame through which the elongate brush structure extends; and a lift arrangement for moving the frame along the side of the building.

2. The building cleaning system of claim 1, further comprising a liquid applicator mounted on the frame.

3. The building cleaning system of claim 2, wherein the liquid applicator includes a dispensing conduit that extends along the length of the frame at the first side of the frame, the dispensing conduit including a plurality of liquid dispensing openings positioned along a length of the conduit.

4. The building cleaning system of claim 3, wherein the dispensing conduit is parallel to the longitudinal axis of the elongate brush structure and mounted above the elongate brush structure.

5. The building cleaning system of claim 4, wherein the liquid applicator is coupled to a source of liquid that includes deionized water.

6. The building cleaning system of claim 1, wherein the arcuate shield is semi-circular in shape.

7. The building cleaning system of claim 1, wherein a liquid applicator mounted on the frame, wherein the liquid applicator includes a dispensing conduit that extends along the length of the frame at the first side of the frame, wherein the dispensing conduit includes a plurality of liquid dispensing openings positioned along a length of the conduit, wherein the dispensing conduit is parallel to the longitudinal axis of the elongate brush structure and mounted above the elongate brush structure.

8. The building cleaning system of claim 1, further comprising a plurality of air moving devices mounted to the frame for generating counterforce to force the frame toward the building, the frame having a length that extends along the central longitudinal axis of the brush structure, and the air moving devices being spaced apart from one another in an orientation that extends along the length of the frame, wherein the air moving devices are adjustable to control the counterforce generated by the air moving devices.

9. The building cleaning system of claim 8, wherein the air moving devices have variable speeds that can be adjusted to control the counterforce generated by the air moving devices.

10. The building cleaning system of claim 8, wherein air flow directions of the air moving devices can be adjusted relative to the frame to control the counterforce generated by the air moving devices.

11. The building cleaning system of claim 1, further comprising a plurality of air moving devices mounted to the frame for generating counterforce to force the frame toward the building, the frame having a length that extends along the central longitudinal axis of the brush structure, and the air moving devices being spaced apart from one another in an orientation that extends along the length of the frame, wherein the air moving devices are fans, and wherein each fan includes a fan blade housed within a cylindrical shroud mounted to the frame.

12. The building cleaning system of claim 11, further comprising a screen shield secured to the shroud and located over an air outlet of the cylindrical shroud.

13. The building cleaning system of claim 1, further comprising a plurality of air moving devices mounted to the frame for generating counterforce to force the frame toward the building, further comprising a remote control system for remotely altering an operational characteristic of at least one of the air moving devices.

14. The building cleaning system of claim 13, wherein the remote control system allows the at least one of the air moving devices to be turned on and off.

15. The building cleaning system of claim 13, wherein the remote control system allows an air flow of the at least one of the air moving devices to be altered.

16. The building cleaning system of claim 13, wherein the remote control system allows an operational speed of the at least one of the air moving devices to be altered.

17. The building cleaning system of claim 1, further comprising a motor for rotating the brush structure, the motor located on a side of the first vertical support member opposite that of the elongate brush structure.

18. A building cleaning system for cleaning a side of a building, the building cleaning system comprising: an elongate brush structure that is rotated about a central longitudinal axis of the elongate brush structure by an electric motor, the elongate brush structure having a length that extends between first and second ends of the elongate brush structure; a frame for supporting the brush structure at a first side of the frame that can be oriented to face toward the side of the building, the frame including: an upper horizontal member having a length that extends at least between the first and second ends of the elongate brush structure; a lower horizontal member, spaced vertically apart from the upper horizontal member, and having a length that extends at least between the first and second ends of the elongate brush structure; a first vertical support member, spanning between the upper horizontal member and the lower horizontal member; and a second vertical support member, horizontally spaced apart from the first vertical support member, and spanning between the upper horizontal member and the lower horizontal member, wherein the first end of the elongate brush structure is coupled to the first vertical support member and the second end of the elongate brush structure is coupled to the second vertical support member; a liquid applicator mounted on the frame, the liquid applicator including a dispensing conduit that extends along the length of the frame at the first side of the frame, the dispensing conduit including a plurality of liquid dispensing openings positioned along a length of the conduit, the dispensing conduit being mounted above the elongate brush structure; and an arcuate shield mounted to the frame, the arcuate shield extending from the upper horizontal member towards the lower horizontal member while curving around the central longitudinal axis of the elongate brush structure such that the central longitudinal axis of the elongate brush structure is an axis of curvature for the arcuate shield, the arcuate shield having an opening at the first side of the frame through which the elongate brush structure extends.

19. The building cleaning system of claim 18, wherein the arcuate shroud is semi-circular in shape.

20. The building cleaning system of claim 18, further comprising a plurality of fans mounted to the frame and arranged to generate a counterforce to force the frame toward the building, wherein a speed of at least one of the fans is variable.

21. The building cleaning system of claim 18, further comprising a motor for rotating the brush structure, the motor located on a side of the first vertical support member opposite that of the elongate brush structure.

22. A building cleaning system for cleaning a side of a building, the building cleaning system comprising: an elongate brush structure that is rotated about a central longitudinal axis of the elongate brush structure by an electric motor, the elongate brush structure having a length that extends between first and second ends of the elongate brush structure; a frame for supporting the brush structure at a first side of the frame that can be oriented to face toward the side of the building, the frame including: an upper horizontal member having a length that extends at least between the first and second ends of the elongate brush structure; a lower horizontal member, spaced vertically apart from the upper horizontal member, and having a length that extends at least between the first and second ends of the elongate brush structure; a first vertical support member, spanning between the upper horizontal member and the lower horizontal member; and a second vertical support member, horizontally spaced apart from the first vertical support member, and spanning between the upper horizontal member and the lower horizontal member, wherein the first end of the elongate brush structure is coupled to the first vertical support member and the second end of the elongate brush structure is coupled to the second vertical support member; a liquid applicator mounted on the frame above the elongate brush structure; a motor for rotating the elongate brush structure, the motor located on a side of the first vertical support member opposite that of the elongate brush structure; an arcuate shield mounted to the frame, the arcuate shield extending from the upper horizontal member towards the lower horizontal member while curving around the central longitudinal axis of the elongate brush structure such that the central longitudinal axis of the elongate brush structure is an axis of curvature for the arcuate shield, the arcuate shield having an opening at the first side of the frame through which the elongate brush structure extends; and a lift arrangement for moving the frame along the side of the building.

23. The building cleaning system of claim 22, wherein the arcuate shield is semi-circular.

24. The building cleaning system of claim 22, further comprising a plurality of fans mounted to the frame and arranged to generate a counterforce to force the frame toward the building, further comprising a remote control system for turning the fans on and off.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic side elevational view of a first embodiment of the cleaning apparatus of the invention pendently supported adjacent the outside wall of a building;

(2) FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. 1;

(3) FIG. 3 is an enlarged side elevational view of the right side of FIG. 1;

(4) FIG. 4 is a schematic side elevational view of a second embodiment of the cleaning apparatus of the invention pendently supported adjacent the outside of a building;

(5) FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 4;

(6) FIG. 6 is an enlarged side elevational view of the right side of FIG. 4;

(7) FIG. 7 is an enlarged side elevational view of the left side of FIG. 4;

(8) FIG. 8 is a perspective view of a cleaning brush showing the support body and cleaning vanes attached thereto;

(9) FIG. 9 is an enlarged cutaway perspective view of section A of FIG. 8;

(10) FIG. 10 is an enlarged side elevational view of the right side of a modification of the cleaning apparatus;

(11) FIG. 11 is a perspective view of a third embodiment of the cleaning apparatus of the invention;

(12) FIG. 12 is a front elevational view of the cleaning apparatus of FIG. 11;

(13) FIG. 13 is a top plan view of the cleaning apparatus of FIG. 11;

(14) FIG. 14 is a side elevational view of the right side of FIG. 11;

(15) FIG. 15 is a side elevational view of a fourth embodiment of the cleaning apparatus of the invention pendently supported on a building;

(16) FIG. 16 is a top plan view of the cleaning apparatus of FIG. 15; and

(17) FIG. 17 is a front elevational view of the cleaning apparatus of FIG. 15.

DETAILED DESCRIPTION

(18) A cleaning apparatus and method according to technology described herein has at least two distinct components that interact to provide a complete cleaning system for the cleaning of surfaces, such as the exterior vertical wall and windows of office buildings, hotels, hospitals and other multistory structures with, by way of non-limiting examples, up to 8 or 10 inches of sharp vertical deviation from flatness between areas of the surfaces (e.g., vertical elevation of panels separating window areas). The apparatus exhibits stability against winds and provides high quality cleaning ability on window surfaces without the use of personnel at the immediate cleaning areas.

(19) A non-limiting general description of the cleaning apparatus described herein may be considered as a washing system for elevated surfaces comprising: a) a housing having a liquid application cleaning system therein; b) a support element that supports and elevates the washing system; c) a rigid member extending from a surface of the housing that faces away from a surface to be cleaned so that the cable, when supporting the cleaning system against the surface to be cleaned and connected to the housing at a connection point, exerts a rotational force on the cleaning system in respect to the fulcrum point at the roof davit connection point; d) weights provided at a distance and direction from the connection point to at least in part counterbalance the rotational force around the connection point on the extended member. The cleaning apparatus may have the support element comprises a) a cable, b) hose, c) rope, or d) two or more of a rope, cable and hose connected to a davit mounted on top of a building. The cleaning apparatus may include a weight located on a rigid frame. The cleaning system may comprise at least one brush that contacts the surface to be cleaned, or at least two brushes that contact the surface to be cleaned. A counterforce generator mounted on the frame establishes a continuous force or thrust that retains the cleaning in effective engagement with the surface during cleaning thereof.

(20) The cleaning apparatus for the surfaces is generally designed for glass or coated glass (e.g., surfaces having abrasion-resistant coatings, light filtering coatings, enhanced cleanable surfaces, etc.) surfaces, but any structure having a relatively flat surface can be cleaned by the present technology. The actual cleaning is done by the application of a cleaning liquid to the surface with sufficient forces involved in the time frame immediate with the liquid application or subsequent to the application to assist in removal of dirt, film, particles, soil age, salt, caked material, deposits, and the like from the surface. Although many systems use jet spray or hand application, especially in conjunction with personnel at the cleaning site (e.g., handling applicators, squeegees, brushes, hoses, buckets, sprays, etc., as opposed to merely being on the roof directing the equipment), jet spray application is less preferred because of its tendency under Newton's Second Law of Motion to push the cleaning apparatus from the wall and make it more susceptible to displacement by ambient air currents and wind. Jet spray application, even with the assistance of heat and chemical, fails to clean the film coating on the surface being cleaned. A preferred application cleaning apparatus comprises brush application, sponge application, strip application, foam finger application, sheet application and the like, where physical elements exert a physical force such as a rubbing action against the surface to be cleaned in the present of a cleaning liquid (which may be water, alone). The second component therefore usually may comprise a frame for support of a motor, liquid delivery system, physical contact system for applying force against the surface to be cleaned while the surface is in contact with the liquid, and a counterforce generator that assist in keeping the physical contact system in cleaning orientation with respect to the surface to be cleaned. Each of these elements will be discussed in greater detail in a review of the Figures of the described technology.

(21) A first embodiment of the cleaning apparatus 2, shown in FIGS. 1 to 3, pendently supported adjacent the outside of a building 4 is operable to cleaning the outside wall or windows 5. A support or davit 6 located on the building's roof 3 has a generally horizontal arm 7 extended outwardly from the top of building 4. A plurality of counterweights 8 mounted on the inner end of davit 6 maintain arm 7 in a generally horizontal position and counter the weight of cleaning apparatus 2 connected thereto with a cable 13. The upper end of cable 13 is secured to the outer end of arm 7. Davit 6 has wheels 9 that permit movement of davit 6 along roof 3 during cleaning of wall 5. Other types of davits can be used to pendently support cleaning apparatus adjacent the side of a building or an upright structure.

(22) Cleaning apparatus 2 has a frame 11 having horizontal and vertical interconnected members or beams. A housing or shield 12 is secured to frame 11. Shield 12 has a back wall and side walls with an opening facing the outside wall 5 of building 4. A grip style winch 14 drivably connected to an electric motor 15 is mounted on frame 11. Cable 13 is operatively connected to winch 14 whereby winch 14 operated by motor 15 winds and unwinds cable 13 to selectively move cleaning apparatus 2 up and down relative to wall 5 of building 4. An elongated chain, web or strap can be used to pendently support cleaning apparatus 2 from davit 6. An electric cable 21, shown in FIG. 2, extends to ground and a source of electric power. A manual control connected to cable 21 is used to control the operation of motor 15. A remote control unit can alternatively be used to control the operation of motor 15.

(23) A pair of generally horizontal cleaning members or brushes 16 and 18 are rotatably mounted within housing 12. Circumferential portions of each brush 16 and 18 extend outwardly from housing 12 to allow brushes 16 and 18 to engage wall 5 and clean wall 5. As shown in FIGS. 2 and 3, electric motors 17 and 19 drivably connected to brushes 16 and 18 rotate brushes 16 and 18 in opposite directions during cleaning of wall 5. Motors 17 and 19 are connected with electric cables to a source of electric power. Manual controls joined to the cables are used to control the operation of motors 17 and 19.

(24) A hose 22 connected to housing 12 delivers cleaning liquid, such as water, to liquid dispensers 23 mounted on housing 12. Cleaning liquid is sprayed onto wall 5 above brush 16 whereby brush 16 scrubs the wet surface of wall 5. Hose 22 is attached to a liquid supply system, such as a pump and deionized water tank (not shown). A plurality of liquid applicators can be associated with housing 12 to dispense cleaning liquid onto wall 5. Excess liquid is drained from the bottom of housing 12 with a drain hose 24.

(25) Cleaning apparatus 2 is counterbalanced with a counterbalancing weight 26 mounted on the outer end of a rod or pole 27. Pole 27 is secured to frame 11 and extends outwardly horizontally from frame 11. The counterbalancing weight 26 provides a downward pivotal force that balances the weight of cleaning apparatus 2 and maintains an inward force on brushes 16 and 18 and stabilizes the cleaning apparatus.

(26) A counterforce generator 28 mounted on frame 11 establishes a counterforce or thrust that continuously maintains brushes 16 and 18 in effective cleaning engagement with wall 5. As shown in FIG. 3, force generator 28 comprises a rotatable fan 29 driven with an electric motor 31. Fan 29 is positioned within a cylindrical shroud 32 mounted on frame 11 outwardly of winch 14. A screen shield 33 secured to shroud 32 is located over the air outlet of shroud 32. Fan 29 when rotated by motor 31 discharges air, shown by arrows 34 in FIG. 1, in an outwardly lateral direction. The moving air establishes a continuous counterforce or thrust on generator 28, frame 11, housing 12 and brushes 16 and 18, as shown by arrows 36, that maintains brushes 16 and 18 in continuous effective cleaning engagement with wall 5 during movement of cleaning element relative to wall 5. Generator 28 is mounted on frame 11 in a location to apply substantially equal counterforce on brushes 16 and 18 to maintain both brushes 16 and 18 in cleaning engagement with wall 5. Counterforce generator 28 can be a plurality of motor driven fans mounted on frame 11. Blowers, air pumps and air and gas movers can be used as a counterforce generator to provide a substantially perpendicular continuous force on cleaning brushes toward wall 5 to maintain the brushes in continuous effective contact with wall 5 during cleaning of wall 5. This presents separation of brushes 16 and 18 from wall 5 due to wind, air currents, mullions, window frames and other building structures. The counterforce also reduces vertical and horizontal swinging movements of cleaning apparatus 2.

(27) Counterforce generator 28 can be provided with one or more movable air outlets, vanes, rudders or nozzles to direct air in selected lateral, horizontal, and vertical directions to adjust the direction of the counterforce on brushes 16 and 18 to maintain brushes 16 and 18 in effective continuous cleaning engagement with wall 5.

(28) The method for cleaning the exterior surface of wall 5 including windows thereon is characterized by providing cleaning apparatus 2 and locating cleaning apparatus 2 with brushes 16 and 18 facing wall 5. The cleaning apparatus 2 is pendently supported adjacent wall 5 with cable 13 attached to davit 6 supported on top of building 4. Brushes 16 and 18 are rotated in opposite directions with motors 17 and 19. The cleaning apparatus operator with a control unit regulates the speed and ON and OFF conditions of motors 17 and 19 A cleaning liquid is dispensed from one or more applicators 23 onto wall 5 adjacent brush 16 during cleaning of wall 5. The cleaning apparatus 2 is moved up and down relative to wall with winch 14 operated by motor 15. The cleaning apparatus operator with a control unit controls the speed, direction of operation and ON and OFF operation of motor 15. A counterforce established with force generator 28 biases brushes 16 and 18 continuously in a generally horizontal direction perpendicular to the outer surface of wall 5 during cleaning of wall 5 as cleaning apparatus 2 is moved relative to wall 5. The counterforce maintains brushes 16 and 18 in surface engagement with wall 5.

(29) The second embodiment of the cleaning apparatus 100, shown in FIGS. 4 to 6, pendently supported adjacent the outside of a building 202 is operable to cleaning the outside wall or windows 203. A support or davit 103 located on the building's roof 109 has a generally horizontal arm 104 extended outwardly from the top of building 101. A plurality of counterweights 108 mounted on the inner end of davit 193 maintain arm 104 in a generally horizontal position and counter the weight of cleaning apparatus 100 connected thereto with a cable 111. The upper end of cable 111 is secured to the outer end of arm 104. Davit 103 has wheels 106 and 107 that permit movement of davit 103 along roof 109 during cleaning of wall 102. Other types of davits can be used to pendently support cleaning apparatus adjacent the side of a building or an upright structure.

(30) Cleaning apparatus 100 has a frame 112 having horizontal and vertical interconnected members or beams. A housing or shield 113 is secured to frame 112. Shield 113 has a back wall and side walls with an opening facing the outside wall 102 of building 101. A grip style winch 114 drivably connected to an electric motor 116 is mounted on frame 112. Cable 111 is operatively connected to winch 114 whereby winch 114 operated by motor 116 winds and unwinds cable 111 to selectively move cleaning apparatus 100 up and down relative to wall 102 of building 101. An elongated chain, web or strap can be used to pendently support cleaning apparatus 100 from davit 103. An electric cable 119, shown in FIG. 5, extends to ground and a source of electric power. A manual control connected to cable 119 is used to control the operation of motor 114. A remote control unit can alternatively be used to control the operation of motor 116.

(31) A pair of generally horizontal cleaning members or brushes 117 and 118 are rotatably mounted within housing 113. Circumferential portions of each brush 117 and 118 extend outwardly from housing 113 to allow brushes 117 and 118 to engage wall 102 and clean wall 102. As shown in FIGS. 5 and 6, electric motors 132 and 133 are drivably connected to brushes 117 and 118 rotate brushes 117 and 118 in opposite directions during cleaning of wall 102. Motors 132 and 133 are connected with electric cables to a source of electric power. Manual controls joined to the cables are used to control the operation of motors 132 and 133.

(32) A hose 144 connected to housing 113 delivers cleaning liquid, such as water, to liquid dispensers 143 mounted on housing 113. Cleaning liquid is sprayed onto wall 102 above brush 117 whereby brush 117 scrubs the wet surface of wall 102. Hose 144 is attached to a liquid supply system, such as a pump and deionized water tank (not shown). A plurality of liquid applicators shown in FIG. 7 are associated with housing 143 to dispense cleaning liquid onto wall 102. Excess liquid is drained from the bottom of housing 113 with a drain hose 146.

(33) A section of brush 117, shown in FIGS. 8 and 9, has a support body comprising a cylindrical rim 121 having adjacent transverse slots 122 and 123 separated with transverse bars 124. A plurality of radial spokes 126 and 127 secure rim 121 to a cylindrical clamp or sleeve 128 attached to the axial shaft of brush 117. A plurality of flexible plastic vanes or brush members 129 mounted rim 121 extend radially outward from rim 121. A single strip of vane material forms two vanes by looping 131 the material through adjacent openings in rim 121. This facilitates removal and replacement of vanes from rim 121. An arcuate retainer 131 fastened to spokes 126 and 127 holds vanes 129 in assembles relation with rim 121. A plurality of rims are attached end to end to provide a complete brush. Brushes 16, 18, and 118 has the same structure as brush 117.

(34) A counterforce generator 134 mounted on frame 112 establishes a counterforce or counter thrust that continuously maintains brushes 117 and 118 in effective cleaning engagement with wall 102. As shown in FIG. 6, force generator 134 comprises a rotatable fan 136 driven with an electric motor 137. Fan 136 is positioned within a cylindrical shroud 138 mounted on frame 112 outwardly of winch 114. A screen shield 139 secured to shroud 138 is located over the air outlet of shroud 138. Fan 136 when rotated by motor 137 discharges air, shown by arrows 141 in FIG. 4, in an outwardly lateral direction. The moving air establishes a continuous counterforce on generator 134, frame 112, housing 113 and brushes 117 and 118, as shown by arrows 142, that maintains brushes 117 and 118 in effective cleaning engagement with wall 102 during movement of cleaning elements relative to wall 102. Generator 134 is mounted on frame 112 in a location to apply substantially equal counterforce on brushes 117 and 118 to maintain both brushes 117 and 118 in cleaning engagement with wall 102. Counterforce generator 134 can be a plurality of motor driven fans mounted on frame 112. Blowers, air pumps and air and gas movers can be used as a counterforce generator to provide a substantially perpendicular continuous force on the cleaning brushes toward wall 102 to maintain the brushes in continuous contact with wall 102 during cleaning thereof. This prevents separation of brushes 117 and 118 from wall 102 due to wind, air currents, mullions, window frames and other building structures. The counterforce also reduces vertical and horizontal swinging movements of cleaning apparatus 100. Counterforce generator 134 can be provided with one or more movable air outlets, vanes, rudders or nozzles to direct air in selected lateral, horizontal, and vertical directions to adjust the direction of the counterforce on brushes 117 and 118 to maintain brushes 117 and 118 in effective continuous cleaning engagement with wall 102.

(35) A modification of the cleaning apparatus 100 is shown in FIG. 10. Cleaning apparatus 200 is attached to a cable 201 that pendently supports cleaning apparatus 200 adjacent an upright wall or window of a structure for cleaning thereof. Cleaning apparatus 200 has a frame 202 supporting a housing or shield 203 accommodating one or more rotatable brushes or cleaning elements. A counterforce generator 204 mounted on frame 202 generates a counterforce that continuously maintains the cleaning brushes in continuous effective cleaning engagement with the wall or window during cleaning thereof. Generator 204 has a plurality of motor driven fans 206, 207 and 208 surrounded with cylindrical shrouds 209, 210 and 211. The counterforce created by rotation of fans 206, 207 and 208 biases the cleaning brushes continuously in a generally horizontal direction perpendicular to the surface during cleaning of the surface as the cleaning apparatus 200 is moved relative to the surface of the structure.

(36) A third embodiment of the cleaning apparatus 300, shown in FIGS. 11 to 14, is pendently supported with a cable 306 from a davit located on a building. Cleaning apparatus 300 has a frame 301 comprising horizontal frame members 302 and 303 connected to upright frame members 304 and 305. An arcuate shield 307 secured to frame member 302 is located adjacent an inside circumferential portion of a cleaning element or brush 308. Brush 308 has a plurality of outwardly extended vanes 309 mounted on a cylindrical body 311. The structure of brush 117 shown in FIGS. 8 and 9 is the same as brush 308. Brush 308 is rotatably mounted for rotation about a horizontal axis on bearings 312 and 313 secured to upright members 304 and 305. An electric motor 314 drives a power transmission or gear box 316 operatively connected to brush 308 whereby on operation of motor 314 brush is rotated.

(37) A liquid applicator 317 mounted on frame member 302 above brush 308 operates to dispense cleaning liquid onto the surface to be cleaned. Applicator 317 includes an elongated tube 318 supporting a plurality of nozzles 319 operable to spray liquid, such as deionized water, to the surface to be cleaned with brush 308. Application 317 is connected to a source of liquid under pressure, such as a pump. A second liquid applicator 321 is mounted on bottom frame member 303.

(38) The cleaning apparatus 300 is moved up and down relative to an upright surface of a structure with a grip style winch 322 connected to cable 306. A DC electric motor 323 coupled to winch 322 operates winch 322 to selectively wind and unwind cable 306 to move cleaning apparatus 300 along the surface during cleaning of the surface. Other types of winches and cable pulling devices can be used with cable 306, a chain or strap to move cleaning apparatus 300. Winch 322 and motor 323 are mounted on frame members 324 whereby the motor driven winch 322 on frame 301 is operable to move cleaning apparatus 300 relative to a surface during cleaning of the surface. Motor 323 is coupled to a source of electric power with an electric cord and a manually operated control unit to regulate the speed, direction of operation and ON and OFF conditions of motor 323. A remote control can be used to regulate the operation of motor 323.

(39) A counterforce generator 326 mounted on frame members 303 and 324 generates a counterforce or counter thrust, shown in FIG. 14 by arrow 327 that continuously maintains brush 308 in effective cleaning engagement with the surface being cleaned. As shown in FIGS. 11 and 12, force generator 326 comprises a rotatable fan 328 driven with an electric motor 329. Fan 328 is positioned within a cylindrical shroud 331 mounted on frame 301. A screen 332 attached to shroud 331 is located over the air outlet of shroud 331. Fan 328 when rotated by motor 329 dispenses air outwardly from cleaning apparatus 300 as shown by arrows 333 in FIG. 14. The air moved by fan 328, shown by arrows 333, establishes a continuous counterforce, shown by arrow 327 opposite the direction of movement of the air discharged by fan 328 on brush 308. This counterforce is generally horizontal and perpendicular to the surface being cleaned with brush 308. The counterforce is a counter thrust that maintains brush 308 in continuous effective cleaning engagement with the surface being cleaned during movement of cleaning apparatus 300 along the surface being cleaned. The axis of rotation of fan 328 is located in substantially the same horizontal plane as the axis of rotation of brush 308 whereby the counterforce does not alter the perpendicular cleaning engagement of brush 308 relative to the surface being cleaned. Counterforce generator 326 can include a plurality of motor driven fans mounted on frame 301 as shown by generator 204 in FIG. 10. A remote wireless signal receiver 334 mounted on frame 301 is part of a wireless remote control system used by the operator of cleaning apparatus 300 to control the operation of motors 314 and 329. The operator can change the speed and direction of rotation of winch motor 314 to alter the rate and direction of movement of cleaning apparatus 300. The operator can also change the speed of operation of motor 329 to regulate the counterforce established by counterforce generator 326.

(40) Blowers, air pumps, and air and gas movers can be used as a counterforce generator to provide a substantially perpendicular continuous force on a cleaning brush to maintain the brush in continuous effective contact with the surface being cleaned. This prevents separation of the brush 308 from the surface being cleaned due to wind, air currents, mullions, window frames and other building structures.

(41) Counterforce generator 326 can be provided with one or more movable air outlets, vanes, rudders or nozzles to direct air in selected lateral, horizontal and vertical directions to adjust the direction of the counterforce on brush 308 to maintain the brush 308 in an effective continuous cleaning engagement with the surface being cleaned. Generator 326 can be mounted on frame 301 in adjustable horizontal and vertical locations with adjustable brackets.

(42) A fourth embodiment of the cleaning apparatus 400, shown in FIGS. 15 to 17, is pendently supported with a cable 401 from a davit 402 located on a building 403 including an upright wall 404 and a roof 406. Cleaning apparatus 400 has a frame 407 comprising horizontal frame members 408 and 409 connected to upright frame members 411 and 412. An arcuate shield 413 secured to frame member 407 is located adjacent an inside circumferential portion of cleaning elements or brushes 414 and 416. Each brush 414 and 416 has a plurality of outwardly extended vanes 417 mounted on a cylindrical body 418. The structure of brush 117 shown in FIGS. 8 and 9 is the same as brushes 414 and 416. Brush 414 is rotatably mounted for rotation about a horizontal axis on bearings 419 and 421 secured to upright frame members 411 and 412. An electric motor 422 drives a power transmission or gear box 423 operatively connected to brush 414 whereby on operation of motor 422 brush 414 is rotated about a horizontal axis. Brush 416 located generally parallel and below brush 414 is also rotatably mounted on frame 407. The rear sections of brushes 414 and 416 are located adjacent shield 413 to confine air and liquids to the areas around brushes 414 and 416. An electric motor 424 drivably coupled to a power transmission or gear box 426 mounted on frame 407 is operable to rotate brush 416 about a generally horizontal axis. Motors 422 and 424 are operable to rotate brushes 414 and 416 in opposite rotational directions or the same rotational directions.

(43) A liquid applicator 427 mounted on frame member 407 above brush 416. Applicator 427 includes an elongated tube 428 supporting a plurality of nozzles 429 operable to spray liquid, such as deionized water, to the surface 404 to be cleaned with brush 416. Applicator 427 is connected to a source of liquid under pressure, such as a pump. A second liquid applicator 431 is mounted on bottom frame member 408.

(44) The cleaning apparatus 400 is moved up and down relative to an upright surface of a structure with a grip style winch 432 connected to cable 401. A DC electric motor 433 coupled to winch 432 operates winch 432 to selectively wind and unwind cable 401 to move cleaning apparatus 400 along the surface 404 during cleaning of the surface 404. Other types of winches and cable pulling devices can be used with cable 401 to move cleaning apparatus 400. An elongated strap or chain can be used to pendently support cleaning apparatus 401. Winch 432 and motor 433 are mounted on frame members 434 whereby the motor driven winch 432 on frame 407 is operable to move cleaning apparatus 400 relative to surface 404 during cleaning of the surface. Motor 433 is coupled to a source of electric power with an electric cord and a manually operated control unit to regulate the speed, direction of operation and ON and OFF conditions of motor 433. A remote wireless control can be used to regulate the operation of motor 433.

(45) A counterforce generator 434 mounted on frame 407 establishes a counterforce or counter thrust, shown in FIGS. 15 and 16, by arrow 436 that continuously maintains brushes 414 and 416 in effective cleaning engagement with the surface 404 being cleaned. As shown in FIG. 17, force generator 434 comprises a rotatable fan 437 driven with an electric motor 438. Fan 437 is positioned within a cylindrical shroud 439 mounted on frame 407. A screen 441 attached to shroud 439 is located over the air outlet of shroud 439. Fan 437 when rotated by motor 438 dispenses air outwardly from cleaning apparatus 400 as shown by arrows 442 in FIG. 15. The air moved by fan 437, shown by arrows 442, establishes a continuous counterforce, shown by arrow 436 opposite the direction of movement of the air discharged by fan 437 on brushes 414 and 416. This counterforce is generally horizontal and perpendicular to the surface 404 being cleaned with brushes 414 and 416. The counterforce is a counter thrust that maintains brushes 414 and 416 in continuous effective cleaning engagement with the surface 404 being cleaned during movement of cleaning apparatus 400 along the surface 404 being cleaned. The axis of rotation of fan 437 is located between the horizontal planes of the axes of rotation of brushes 414 and 416 whereby the counterforce does not alter the perpendicular cleaning engagement of brushes 414 and 416 relative to the surface 404 being cleaned. Counterforce generator 434 can include a plurality of motor driven fans mounted on frame 407 as shown by generator 204 in FIG. 10.

(46) A remote wireless signal receiver 443 mounted on frame 407 is part of a wireless remote control system used by the operator of cleaning apparatus 400 to control the operation of motors 422, 424 and 438. The operator can change the speed and direction of rotation of winch motor 433 to alter the rate and direction of movement of cleaning apparatus 400. The operator can also change the speed of operation of motor 438 to regulate the counterforce established by counterforce generator 434.

(47) Blowers, air pumps, and air and gas movers can be used as a counterforce generator to provide a substantially perpendicular continuous force on a cleaning brush to maintain the brush in continuous effective contact with the surface being cleaned. This prevents separation of the brushes 416 and 418 from the surface being cleaned due to wind, air currents, mullions, window frames and other building structures.

(48) Counterforce generator 434 can be provided with one or more movable air outlets, vanes, rudders or nozzles to direct air in selected lateral, horizontal and vertical directions to adjust the direction of the counterforce on brushes 416 and 418 to maintain the brushes 416 and 418 in an effective continuous cleaning engagement with the surface being cleaned. Generator 434 can be mounted on frame 407 in adjustable horizontal and vertical locations with adjustable brackets.

(49) The above description and drawings of the several embodiments of the cleaning apparatus may be modified and altered by persons skilled in the art within the scope and context of the invention defined in the appended claims and their equivalents.