ROTARY SURFACE TREATMENT ASSEMBLY

Abstract: A fluidically driven rotary treatment assembly for surfaces for wherein an unit rotates about an axis parallel to the surface being treated. It has a wand for the attachment to a source of fluid at one end, and a treatment unit mounted at the further end. Water flowing through the wand is diverted into a channel or channels for the operation of at least one turbine unit connected to the treatment unit. Fluid exiting from the turbine unit is directed onto the surface being washed to throughly flush the same. The unit is provided with means for inserting detergents and/or waxes and apertures are provided the surface of the unit whereby these materials can be fed to the surface and mix with the fluid for application to the surface. Provision is made whereby the treatment unit can be readily removed, for example, for substitution or the replacement of the treatment elements.

Description: ROTARY SURFACE TREATMENT ASSEMBLY This invention relates to rotary treatment assemblies for surfaces such as brushes, washers, and polishers. It particularly relates to such assemblies for use on automobiles, and has special application in an hydraulically driven system which can simultaneously wash and rinse a surface. Provision can also be made for the distribution of detergent and/or wax distributed through a rotary treatment driven to the surface. A large variety of rotary washing brushes for the cleaning of automobiles, windows, and many other objects are well known and widely used. Such devices are adapted to be connected to the end of a conventional garden hose, or the like, which supplies the necessary water for the washing operation. Some of these devices include reservoirs for detergent and/or wax external to the brush such that these additives are fed with the water during the washing process. The brushes known in the art utilize a disc type brush operating about an axis generally perpendicular to the surface being washed. These brushes are either driven by gear mechanisms or by some form of turbine which is operated by the water flowing through the device. Typical of the brushes known in the art are shown and described in U.S. Patent Nos. 3,989,391; 3,15-3,799; and 2,918,686. Further typical patents include U.S. Patent Nos. 2,678,457; 2,540,240; 1,7',6,641; 1,649,677; 1,636,437; and 1,212,967. Other very old patents in this field are U.S. Patent Nos. 919,756; 661,277; and 634,813. The rotary brushes, as illustrated' in this prior art, have certain disadvantages. For example, the entire surface of the brush is usually in contact with the surface being washed. If the brush has any significant size, there is substantial friction between the brush and surface, even though the surface is lubricated with the water, and thus considerable force must be utilized to rotate the brush. Accordingly, the brushes are usually quite small in diameter, and therefore, cover a relatively small area of the surface being washed. Furthermore, a slight exertion of pressure on the brushes causes the stalling thereof, and therefore, the brush loses its effectiveness. In the brushes that are shown to have systems for adding detergent and/or was to the water, the added auxiallary equipment contributes significantly to the cost of the unit as well as the maintenance thereof. τhe present invention is directed at the provision of a rotating treatment unit for washing or otherwise treating surfaces such as automobiles wherein a relatively small portion of the unit is in contact with the surface at any one time, thereby reducing the force necessary to cause rotation thereof. The addition or supply of detergent and/or wax in a simple manner is also sought. According to the invention a rotary treatment assembly for surfaces comprising an element having a coupling unit at one end for releasable connection to a source of pressurized fluid, the other end of which element has two legs of which at least one terminates in a turbine housing; an elongate drum rotatably mounted between the legs with its axis of rotation extending substantially between the legs; a plurality of treatment elements projecting substantially radially from said drum axis; a plurality of turbine blades disposed circumferentially and adjacent at least one end of said drum, and at least partially received in said at least one turbine housing; a*Λ means for directing fluid under pressure from a said source coupled to said one end of the element along the element and at least one leg thereof to drive a said turbine and rotate the drum. In a primary embodiment, the invention provides an hydraulically driven washing brush which rotates on an axis substantially parallel to the surface being washed, whereby surfaces are washed and/or waxed with an inexpensive apparatus. In accordance with a preferred embodiment of the present invention, a hollow cylindrical drum is mounted for rotation about an axis parallel to the surface being washed and is provided with a plurality of soft, generally radially extending strips, which form the washing unit per se. Each end of the drum is provided with a plurality of circumferentially spaced turbine impeller blades. This drum is mounted on a central shaft such that each of the impellers fits within housings that distribute incoming water in the form of a jet against the blades causing rotation of the drum. The water from the housing, after being used for the rotation of the drum, exits from the forward edge of the housing to flush the surface being washed at the drum. Openings in the end of the drum, which openings have removable closures, provide for the insertion of detergent and/or water soluable wax within the drum whereupon these materials are permitted to exit through small dispensing holes in the surface of the drum so as to be fed to the brush. All of these components are mounted upon the end of a wand which, in turn, can be releasably attached to a conventional water supply hose. Embodiments of the invention will now be described by way of example and with reference to the accompanying drawings wherein: Figure 1 is a top view of a hydraulic car wash brush according to the present invention. Figure 2 is an end view of the brush shown in Figure 1 with the wand portion removed. Figure 3 is a plan view of the drum utilized in the brush in Figure 1 showing the mounting shafts, the turbines impeller blades, and the dispensing apertures. Figure 4 is a drawing of an end view of the drum of Figure 3. Figure 5 is a front end view of the brush of Figure 1, with a portion cut away, taken at 5-5 of Figure 1. Figure 6 is a cross-sectional view of one of the housings of the brush of Figure 1 taken at 6-6 therein. Figure 7 is a cross-sectional view, partially cut away, of one embodiment of the brush of the device of Figure 1. Figure 8 is a plan view of an alternate embodiment of a drum unit used in the device of Figure 1. Figure 9 is an end view of the drum unit of Figure 8. Figure 10 is a front end view of another embodiment of the invention, with a portion cut away, showing spray nozzles for rinsing purposes- Figure 11 is a cross-sectional view of one of the turbine units of the device of Figure 10 showing the spray nozzle of Figure 10 and a spray deflector or shield. Referring now to Figure 1 , shown therein at 10 is a top view of one embodiment of the present invention. This device has a wand 12 which terminates at a far end with a female coupling 14 having internal threads which provide for mating with the threads on a male coupling 16 of a conventional hose 18. The hose and the two couplings are of conventional design. The wand carries a generally cylindrical handle 20 for the convenience of grasp by a user. The second end of the wand 12 terminates in a Y-connection 22, thus forming two legs " 24, 26, that communicate with the interior of the wand. These legs 24. 26 terminate in housings 28, 30 for the purposes described hereinafter. The wand, legs, and housings are all fabricated as a single piece. These housings respectively have external pods 32, 34 for enclosing the end surfaces of a drum unit 36. The drum carries a brush unit 40 formed from a plurality of brush elements 41. The drum is supported and rotates upon shafts 38, 39 which penetrate the pods 32, 34 such that the drum and brush 40 are free to rotate about the axis of the shafts 38, 39. An end unit view of the brush portion of the device of Figure 1 is shown in Figure 2. It may be seen that the shaft 39 is positioned centrally in each of the pods such as 34. Furthermore, it may be seen how the housing 30 generally surrounds the pod for purposes described hereinafter. The pod is provided with an opening 42, which opening can be provided with a removable closure (not shown) . Opening 42 provides for the insertion of detergent and/or wax into the interior of the drum of the brush unit. It is to be understood that the opposite pod unit (eg., 32) can contain a similar opening with a removable closure for draining from the interior of the brush or adding material thereto. A plan view of the central drum 36 is illustrated in Figure 3. This drum unit consists of a hollow cylindrical shell unit 44 which has appropriate end caps (see Figure 4) having projected therefrom the shafts 38, 39. Adjacent each end of the shell 44 are a plurality of circumferencially spaced turbine impeller blades 46, 47. It will be understood that if only one turbine unit is utilized, only one set of impeller blades is needed. These impeller blades provide for the rotation of the shell 44 in a manner described hereinafter. The shell is also provided with apertures 48 in the wall thereof whereby detergent and/or wax contained in the shell can exit the- shell under centrifugal force to be injected into the brush for their intended purposes. An end view of the drum, unit 36 is shown in Figure 4. It may be seen that the turbine blades 46 extend substantially radially from the cylindrical shell 44 in a uniform manner. Shown in this figure also is an alternative opening in the end of a drum closure wall 50 which, when aligned with the opening 42 illustrated in Figure 2, provides for the insertion or removable of materials into the interior of the shell 44. A partially cut away end view of the present invention is shown in Figure 5. This view is taken at 5-5 of Fiσure 1. Not shown in this -a- figure in order to provide clarity thereto, are the brush elements 41 of Figure 1 which would be- attached to the drum unit 36 in any suitable manner. It may be seen in this figure that the housing 28 has a portion 54 removed along the lower edge thereof. A corresponding portion is removed from the housing 30. This removed portion 54 permits the flow of water that has been used for the turbine drive to exit from the unit for" the purposes of throughly flushing the surface against which the brush elements 41 are in contact. Also, it may be seen in this figure how the turbine blades 46 fit within the housing 30 and the ends of the drum unit 36 fit within the pods 32, 34. A cross-sectional view of one of the housings ; i.e., housing 30, is shown in Figure 6. This figure is taken at 6-6 in Figure 1. It may be seen that the conduit 26 communicates with the volume within housing 30 surrounding the turbine blades 46 such that water flowing through the conduit 26 strikes a portion of the blades bringing about rotation of the drum unit 36. This .view shows that the opposite end closure wall 55 of the drum unit 36 is also provided with an opening 56 corresponding in_purpose -to-the. opening 52 shown in Figure 4. When aligned with_a corresponding opening in the end pod 32, material can be added to or removed from within the shell 44. It will be understood that as in Figure 5, the brush elements 41 of the brush 40 are not shown in Figure 6 for clarity. In order to increase the efficiency of the turbine units, it may be desirable to increase the velocity of the water and to more exactly direct the same against the impeller blades 46. Shown in Figure 6 is a means for accomplishing these effects. A jet unit 60 having a small exit passageway 62 is inserted in leg 26 where the same terminates in housing 30. The other leg 24 can have a corresponding jet unit (not shown). Although a pair of turbine motors are illustrated in the figures, it will be recognized by one versed in the art that for small drums, only one such drive unit may be required. In such circumstance, the opposite end of the drum 36 can be supported as shown or by a separate arm extending from the wand 12 to an appropriate position to receive the shaft 38. In either embodiment the drum can be removed and/or replaced by spreading the housings 28, 30 an amount sufficient to disengage the shafts 38, 39 from the respective pods 32, 34. Such removal will permit the replacement of the brush elements if needed. The brush elements are typically strips of flexible plastic or the like. They can be directly attached at one end to the drum 36 or to an elastic cylindrical sleeve 5S which closely embraces the drum 36. This later embodiment is illustrated in Figure 7. This sleeve 58, being flexible, permits insertion onto the drum by passing over the impeller blades 46, 47. An alternative construction for inserting additives to the cavity of the drum 36 is illustrated in Figures 8 and 9. The aforementioned opening 42 in the pod 34 and opening 52 in the drum end wall 50 are eliminated in this embodiment. In their place is substituted an opening' 64 located on the axis of the' shaft 39' which opening communicates with the interior of the drum. If desired, the shaft 38' can also be provided with a corresponding opening 65. A further embodiment of the invention includes spray nozzles to rinse the surface after washing. One such embodiment is illustrated in Figures 10 and 11. It may be seen in Figure 11 that an additional water channel 66, having a channel 67, is provided adjacent the end of leg 26. This channel terminates in a slit or small opening 68 which functions as a rinse nozzle. As shown in Figure 10, another such nozzle unit 70 with opening 72 is provided on the top of leg 28. Preferrably, the spray rinse openings 68, 72, are so positioned that spray from both converge about two feet ahead of the brush in order to provide sufficient water for a complete rinse. An alternate construction (which is not shown) for spray units employs separate water conduits leading to the end of the handle 20 (see Figure 1 ) . These additional water conduits would parallel the legs 26, 28 and join on the wand 12, terminating in a valve that could be used to select "wash", "rinse" or "off". Soft brush elements, as employed in this device, cause considerable splatter. To reduce the amount of such splatter reaching a user of the device, it may be desirable to use a splash shield. One such shield 74 is illustrated in Figure 11. It is fastened in any suitable manner to the legs 26, 28 of the device. Typically, this can employ split collars 76 or the like. The splash shield typically is fabricated of a semi-flexible material. For normal operation of the present invention, coupling members 14, 16 are mated such that water flowing through the hose 18 passes into the wand 12. In the embodiment shown in Figure 1, this water is divided through channels 24, 26 so as to be directed to headers 28, 30 for impingement upon the two sets of turbine blades thereupon causing rotation of the drum 36. The water exits from the turbines, thereby flushing the surface to be washed such that the brush elements 41 during the rotation of the drum 36 brings about the desired washing of a particular surface. Liquid detergent and/or wax contained within the drum 36 is moved by centrifugal action and exits the drum through apertures such as at 48 whereupon the detergent and/or wax mixes with the water to provide the desired action on the surface being washed. Since contact between the brush elements and the surface occurs at a relatively small distance away from the drum 36, any friction from the surface which tends to place a load on the drive turbines is less than at an extended distance. Accordingly, the two drive units will maintain the drum 36 in a rotary motion even when a reasonable degree of force is applied ' to the surface being washed. Although not shown in the figures, it may be desirable to include a valve in the hose 18 whereupon the water flowing through the device can be controlled and/or stopped, thus permitting the removal of the wand 12 from the hose 18. Although a preferred embodiment of the present invention has been shown and described, it will be apparent to those versed in the art that modifications thereto can be made without departing from the scope of the invention. For example, the assembly can be readily adapted to be driven by any pressurized fluid such as air or gas, and as such can be used as a polisher or scrubber, rather than a washer as described.

Claims: C L A I M S : 1. A rotary treatment assembly for surfaces comprising an element having a coupling unit at one end for releasable connection to a source of pressurized fluid, the other end of which element has two legs of which at least one terminates in a turbine housing; an elongate drum rotatably mounted between the legs with its axis of rotation extending substantially between the legs; a plurality of treatment elements projecting substantially radially from said drum axis; a plurality of turbine blades disposed circumferentially and adjacent at least one end of said drum, and at least partially received in said at least one turbine housing; a means for directing fluid under pressure from a said source coupled to said one end of the element along the element and at least one leg thereof to drive a said turbine and rotate the drum. 2. A treatment assembly according to Claim 1 wherein said at least one turbine is a water turbine. 3. A treatment assembly according to Claim 1 wherein said at least one turbine is a gas turbine. 4. A treatment assembly according to any preceding Claim wherein the directing means comprises passageways in the element and at least one leg thereof. 5. A treatment assembly according to any preceding Claim including means for passing fluid discharged from said at least one turbine onto a surface being treated. 6. A treatment assembly according to any preceding Claim wherein the directing means are oriented to direct fluid substantially tangentially with respect to the turbine blades. 7. A treatment assembly according to any preceding Claim wherein each leg terminates in an hollow turbine housing, wherein the drum is provided with a plurality of turbine blades circumferentially mounted at each end thereof within the housings in registry with directing means in the legs. 8. A treatment assembly according to any preceding Claim wherein the drum is hollow and provided with end caps, at least one end cap having an access port for admitting washing additives into the drum, and wherein the drum is provided with at least one aperture in the wall thereof for feeding such additives to the treatment unit. 9. A treatment assembly according to Claim 8 wherein the end caps are each provided with a centrally located, outwardly directed shaft element and wherein the turbine housings are each provided with a circular aperture to rotatably receive one of the shaft elements for support of the drum between the legs. 10. A treatment assembly according to any preceding Claim wherein the treatment elements are flexible plastic strips, each having one end attached to the drum. 11. A treatment assembly according to any of Claims 1 to 9 wherein the treatment elements are flexible p-lastic strips, each having one end fastened to a flexible sleeve member releasabϊy embracing the drum. 12. A treatment assembly according to any preceding Claim including a jet at the end of the directing means to accelerated fluid to impinge upon the turbine blades. 13. A treatment assembly according to any preceding Claim including a rinse nozzle positioned at each of said turbine housings for directing a fluid spray forward of the treatment unit. 14. A treatment assembly according to any preceding Claim including a shield attached to and depending from the legs to confine fluid to the vicinity of a surface treatment zone. 15. A hydraulically driven rotary brush assembly for washing vehicles and the like with water, which comprises: a wand element having a coupling unit at a first end for attachment to a source of pressurized water, and a further end terminating in a Y-connection of two legs, each leg having a first end joined to said wand, and a further end, said wand and saild legs provided with communicating passageways for the flow of such water therethrough; a turbine housing attached to and communicating with corresponding of said further ends of said legs, each of said housings provided with a central aperture in a side wall; a hollow cylindrical drum having opposite end walls each provided with an upstanding shaft stub for rotatable engagement with said apertures in said turbine housings, at least one of said end walls being provided with an access port for admitting washing additives to the interior of said drum, said drum being provided with apertures in the cylindrical wall thereof for feeding said additives out of said drum; a plurality of turbine blades mounted circumferentially about said drum adjacent both ends of said drum to be received within corresponding of said turbine housings and aligned with said further ends of said legs; and a brush unit surrounding said drum for rotation with said drum, said brush unit having a plurality of flexible plastic brush elements projecting substantially radially from said drum during rotation of said drum whereby such water flowing through said wand and said legs impinges upon said turbine blades within said turbine housings causing concomitent rotation of said drum and said brush unit, with such water discharging from said turbine housings flushing such surface of such vehicles.

Inventors: NG KAR MING, SWANSON ROBERT ANTHONY, NG, KAR MING, SWANSON, ROBERT, ANTHONY
Applicants: COUNTRY RISE LTD, COUNTRY RISE LIMITED
Application year: 1985
Main classification: A46B13
IPC codes: A46B13, B08B1, B60S3