US1606821A - Rotary scrubbing brush - Google Patents

Description

Nm@ E@ i192@ QZ R. ANDERSON ROTARY SGRUBBING BRUSH Filed Deo. 29, 1924 2 Sheets-Sham l alu f if Y:

,5J/@A457 d `t7 j@ wig f u w#- 4 f f5 i? C? .-f, d /6 2/ l\ i1 I, i

Nov. V16 1926. 1,606,821

R. ANDERSON ROTARY ySGRUBBING BRUSH File-@DcA 29, 1924 2 sheets-sheet 2 mig?.

Patented Nov. i6, 1926.

ROY ANDERSON, 0F ATLANTA, GEORGIA.

ROTARY SCRUBBING BRUSH.

Application :tiled December 29, 1 924. Serial No. 758,691.

-This invention relates to a revolva'ble brush of that class wherein a circular brush is rotated a low of water under pressure through a turbine wheel or the like secured to or connected with the brush head. These brushes may be of fibre or bristle tufts when required for washing railway vehicles or automobiles, or of metal wire when used for scrubbing or removing barnacles or marine growths from the bottom of ships. v

The improvements are directed to obtain a maximum efficiency from the water ap plied with a free delivery of the water discharged through the head of the brush to the surface being washed. It is also designed to deliver such proportion of the exhaust water as passes into the annular clearance space between the brush head and the casing through a port in the flanged outer edge of the casing on the surface being brushed, instead of havingl it spread all around the brush by the centrifugal action of the brush head.

There are several other incidental features of improvement to which attention will be drawn in the following specilication, reference beingmade to the drawings which accom any it, of which:

Figure l slows a section of the brush in its simplest form.

Figure 2 is a sectional plan on the line 2-2 in Figure l.

Figure 3 is a development of the section on the line 3 3 in Figure 2.

Figure l is an inverted plan of the exhaust fluid directing baille.

Figures 5 and 6 show a modification of the brush casing in section and plan.

Figure 7 lis a cross section of a further modilied form of brush.

Figure 8 is a detail plan View. of a single blade or vane.

Figure 9 is -a cross section taken on the line 9-9 on Figure 8.

ln these drawings 2 represents the brush head in Vwhich the brush tufts 3 are firmly secured in any suitable manner. rllliis head 2. is rotatabl.' mounted on a pin et secured the close top vci? a casing '5, the outer edge of which is downwardly langedas at te approximately the level of the underside et the brush head The bearing oit the hub of the brush head on the cover 4 has -a ball bearing 7 to receive the pressure imposed on the brush in'use.

The tufts 3 or scrubbing part of the brush are grouped in concentric circles, the -outer one adjacent the outer `edge of the brush head and the linner circle adjacent the pin l on which the head 2 rotates.

A series of 'apertures 8 pass through the brush headv 2 between the outer and inner concentric tufts 3', leaving bars 9 between them connecting the o uter portion of the head to the inner or central portion.

Curved vanes -lO are secured to or integral with the upper side of the brush head 2, which blades are adapted to receive a jet of water issuing froman aperture 11 directed angularly from the hollow cavity 12 in the handle socket 13.

The luid by which the wheel is operated is thus directed angularly on the vanes and the energy of its impact thereon rotates the brush head :2. The -fluid, which has acted on the vanes 10, escapes through the apertures 8 of the brush head and assists thewashing action of the brush revolved by its agency.

To ensure delivery of the greater part ot' the water through the apertures 8 of the brush head after that water has done its work on the vanes l0, a' baille or check lli. projects downward from the nnerside of the top of the casing 5 immediately over the circle of the apertures 8 of the brush head, and approximately opposite the water jet delivery aperture 11. 'l`he surface ot' this projection 16 is concavely curved opposite the direction of ,rotation of the brush head and in cross section is concavely curved across its width to receive the backwardly directed flow of water from the inner edges of the blade lO as they pass the jet aperture l1 and to direct that flow downward through the apertures 8 of 'the brush head as they rotate past it.

Y To further facilitate such water delivery through the brush head, the short arms 9 which separate the apertures 8 and connect the outer portion of the brush head; to the central portion of the same, are proximately tangential to the check 16, as shown Figure of the diam ing,

As a certain amount of water will unavoidably be carried by the vanes 0r buckets and by the brush head past this check 16 and will, by centrifugal force, be thrown outward against the downwardly turned edge 6 of the casing 5, an aperture 15k is provided adjacent the opposite'side of theccasing from the jet aperture 11, which aperture is approximately tangential to the outer circle of the brush head. Through this aperture 15 any water thrown oli b the head within the casing will be projected outward where it will not embarrass the user of the brush but will help to clean the surface he has washed, or will wash dust or the like from the surface he is about to move the brush over.

Secured to and projecting downward from the head of the pivot pin 4 is a stud or knob 17 of rubber or the like material which is designed to limit the amount of llexure that can be imposed on the brush itself. If too much pressure is applied to the brush it is not only less effective, but subjects the brush to injury. It also imposes too much resistance to rotation and slows down thespeed and the pressure onthe brush hasto be relaxed to enable the speed to be recovered, thereby causing a loss of time. The central studl 17 limits the 'iexure to which the brush tufts are subjected and be ing applied to a non-rotatable part of the brush opposes no resistance to its rotation.

In cases where it is not desirable to have modified as shown in Figures 5 and 6 of the drawing, where an annular baille 14v curves downward and inward from the top of the casing 5 toward the' inner circle of the apertures 8 of the brush head, and the wall 6 of the casing is curved outward from the top of the brush head and at a position approximately opposite the jet delivery 11 merges into a channel or passage 18 formed in the casing 5, and following a sp'iral in the direction of rotation delivers into the annular space between the inner edges of the turbine blades 10 and the baffle 14.

With this provision the water thrown by contrifugal action from the brush head and its vanes 10 will find an exit through the spiral channel 18 described and will be directd through the apertures 8 of the brush hea Obviously the pin 4, instead of being secured in the casing, may be secured in the brush'head and rotated in a ball bearing in the casing.

The features of improvement to which attention is particularly directed are:

The turbine blades secured to or integral -with the back 2 of a rotatable brush to project upward from the outer portion of the back, said blades concaved on axes at right angles to each other to receive the impact prevented.

of a jet of fluid under pressure delivered tangentially inward on them, which blades will absorb the greater part of the energy of the jet and deliver the fluid within the circle of the blades 10 in a direction ap- ,10. proximately opposite to that in which it was delivered to them.

The provision of apertures 8 in the brush head through which the exhaust fluid from the driving turbine is delivered to the brush.

The provision of the baiiie 16 on the opposite side of the turbine vanes to the jet l1 directing the .exhaust fluid downward through the apertures 8 of the brush head.

The provision of an aperture 15 in the cas- 80 ing through which such of the fluid as may be thrown from the periphery of the brush head within the casing may escape.

And the provision of the passage 18 through which such fluid, instead of being thrown through an aperture 15 may be returned toward the central part of the casing `and delivered through the apertures 8 of the brush head.

The vanes may each be. centrally edgenotched as at 19 topermit a degree of free passage of. the water driving the brush.

B y reference to Figures 8 and 9 the manner of shaping the vanes or blades is shown. By thus shaping the said vanes the jet of propelling fluid is held more or less confined to the vane pocket thus formed and loss of power resultant from spraying is effectively By actual test, I have observed that brushes equipped with vanes shaped as described operated in the neighborhood of twenty percent more efliciently than those equipped with straight vanes.

It will also be apparent that, by making the peripheral edges of the vanes relatively sharp and providing the edge notch in each thereof, at the instant the edge of thevane is engaged by the propelling jet the portion of said jet disturbed by the vane is diverted to effective use. If the edges of the vanes were made straight and the notches not provided the backs of the vanes would sidewipe the jet and reduce the power. The notches also permit the jet to reach in and strike the preceding vanes with full force at the most effective impact point before the jet is cut off by a succeeding vane.

ln Figure 7, have illustrated a further modification of the invention in which the brush head is grooved as at 2O to receive the concentrically arranged rings of bristles 21 which in this form of the invention are held together by twisted wire. As shown, the brush head includes an upwardly extended hub 22 `which rotatably engages the bearing bushing 23, the latter being provided with an annular groove 24 for receiving the sprinv wire mounting @up 25 with which the but is provided. In this/manner the brushhead is readily removably mounted, facilitating loo quick change from a soft bristled brush to a coarse oneor` vice versa.

What I claim is:

1. A washing brush, comprising in combinationa circular ylorush head having curved vanes upwardly projecting around the ,outer edge of' its upper side, and apertures through the brush head within the circle ofthe vanes a casing enclosing the upper part of the hea and downwardly ianged' to ladjacent. the plane of its underside within which casing the brush head is rotatably mounted,isaid casing having a handle socket projecting from one side with a duct angularly delivering from its cavity to within the cas- `ing toward the desired directionof rotationL and a bale approximately opposite this duct and within the circle of the vanes, the surface of which baiiie is .curved downward toward the plane of the brush head with its Iconcavity opposite the direction of rotation whereby the exhaust iuid from the vanes is directed downward through the apertures of the head.

2. A washing brushcomprising in combination a circular brush head having curved vanes upwardly projecting from its upper side around the outer lmargin of the head, and apertures through the brush head within the circle of the vanes, a casing enclosing the uppe part of thebrush head and downwardly hanged around its edges within which casing the brush head is rotatably mounted, said casing having a handle socket and a jet aperture delivering angularly therefrom into the casing ytoward the desired direction of rotation and having also a baiile projecting downward within the circle of the vanes of the brush head to direct the exhaust fluid from the vanes through the apertures of the brush head, and an laperture in the downward ilangein approximately the opposite side of the casing to the jet aperture.

3. A washing brush, comprising in combination, a circular brush having vanes upwardly projecting from it around the outer margin of its upper side, said vanes being curved through their length and depth and the concavity thus formed being directed to oppose a propelling jet, a casing `having a flange peripherall encasing the brush head, means for rotata 1y mounting said brush head on saidV casing, said caslng having a handle socket outwardly projecting from its edge with a jet aperture leading from the cavity of the socket and directed angularly into the casing toward the desired direction ofy rotation, means for delivering the exhaust Huid from the space ,within the vanes, the said vanes being also provided with a notch in the peripheral edge of each thereof in rotative alignment with said jet aperture.

' ROY ANDERSON.

Images