US2846123A - Liquid handling apparatus for delivering paints and other liquid materials to spray guns - Google Patents

Description

Aug. 5, 1958 R. J. GRAY 2,846,123

,LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND OTHER LIQUID MATERIALS TO SPRAY GUNS Filed March 26, 1949 11 Sheets-Sheet 1 INVENTOR Russell J. Gray 2,846,123 LIQUID HANDLING APPARATUS FOR'DELIVERING PAINTS AND R. J. GRAY Aug. 5, 1958 OTHER LIQUID MATERIALS T0 SPRAY GUNS Filed March 26, 1949 ll Sheets-Sheet 2 INVENTOR Russell J. Gray BY 2,846,123 LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND R. J. GRAY Aug 5, 1958 QTHER LIQUID MATERIALS TO SPRAY GUNS Filed March 26, 1949 ll Sheets-Sheet 3 INVENTOR Russell J. Gray TTORNEY Aug. 5, 1958 R. J. GRAY 2,846,123

LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND OTHER LIQUID MATERIALS TO SPRAY GUNS Filed March 26, 1949 ll Sheets-Sheet 4 s I E 12" i Q o JZ INVENTOR Russell .1. Gray A NEY Aug. 5, 1958 R. J. GRAY 2,846,123

LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND OTHER LIQUID MATERIALS TO SPRAY GUNS Filed March 26, 1949 I ll Sheets-Sheet 5 INVENTOR Ruse]! J. Gray A ORNEY Aug. 5, 1958 R. J. GRAY LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND OTHER LIQUID MATERIALS TO SPRAY GUNS Filed March 26, 1949 11 Sheets-Sheet 6 INVENTGR Russell J. Gray Aug. 5, 1958 R. J. GRAY 2,

LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND OTHER LIQUID MATERIALS T0 SPRAY GUNS l1 Sheets-Sheet 7 1 Filed March 26, 1949 /Z3 WW A TORNEY R. J. GRAY HANDLING APPARATUS FOR DEL-IVE n. 8 n W 6 h 4 S 8 .r N 2 6 S e T h N S I 1 A81 N U G N I R Aug. 5, I958 LIQUID OTHER LIQUID MATERIALS TO SPRAY G Filed March 26, 1949 m5 my 00 m9 INVENTOR Russell J. Gray QIRNEY Aug. 5, 1958 R. J. GRAY 2,

LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND OTHER LIQUID MATERIALS TO SPRAY GUNS Filed March 26, 1949 ll Sheets-Sheet 9 INVENTOR. Russell J. Gray BY Alla/nay Aug. 5, 1958 R. J. GRAY 2,846,123

LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND OTHER LIQUID MATERIALS T0 SPRAY GUNS Filed March 26, 1949 11 Sheets-Sheet 10 lNVENTOR I Russell .1 6m

CDRNEY Aug. 5, 1958 R J GRAY 2,846,123

LIQUID HANDLING APPARATUS FOR DELIVERING PAINTS AND OTHER LIQUID MATERIALS TO SPRAY GUNS Fild March 26, 1949 ll Sheets-Sheet 11 Z06 20. 1 r/ aa lugmkg Egan; w

IN VEN TOR.

Russell J. Gray A/Iamay United States Patent" LIQUID HANDLILJG APPARATUS FOR DELIVER- ING PAINTS AND OTHER LIQUID MATERIALS T SPRAY GUNS Russell J. Gray, Meadeville, Minm, assignor to Gray Company, Inc., Minneapolis, Minn, a corporation of Minnesota Application March 26, 1949, Serial No. 83,708

21 Claims. (Cl. 222-240) The present invention relates to liquid handling apparatus for delivering paints and other liquids to spray guns.

My present invention further relates to paint-mixing and paint-dispensing apparatus, and particularly to paintmixing and paint-dispensing apparatus which can be used to agitate or mix paint in the original container as well as to dispense the paint directly from such original container directly to an air-operated spray-gun, nozzle or the like. One of the objects of the present invention is a portable paint-mixing and paint-dispensing apparatus within which an original merchandising container filled with paint may be placed whereby the paint will be thoroughly mixed and agitated within the original container and dispense directly therefrom to the spray-gun or nozle.

Another object of the present invention is a paint-mixing and paint-dispensing apparatus which is supported by or which rests upon an original paint-vending container, which container is generally too large to be readily portable.

One aspect of the present invention is a paint-vending and mixing machine which comprises a single deliveryhose through which the paint is supplied from an original merchandising container to the spray-gun or nozzle.

Another aspect of the present invention is a paint-mixing and vending apparatus which comprises a delivery line through which paint may be supplied to the spraygun or nozzle and which also comprises return line through which any unused paint may be returned to said container; these two lines comprising a circulatory system through which the paint may flow and circulate so as to prevent any sedimentation or deposit of pigment within the delivery or return lines.

Another aspect of the present invention is a paintmixing and dispensing apparatus which may be used, alternatively, either as a single-line paint-dispensing apparatus by which paint may be supplied directly to the spray-gun or nozzle, or which, on the other hand, may be used as a dual-line supply system through which paint may be supplied to the spray-gun or nozzle and through which any unused paint may be returned to the original container.

An additional object of the present invention is to provide a paint-pump or supply system which incorporates therewith a plurality of circulatory channels or passageways through which the paint may be circulated and agitated, and which also includes an agitating blade associated therewith, whereby the paint, as supplied in the original merchandising container, may be thoroughly mixed and agitated before being supplied to the spraygun or nozzle by said pumping apparatus.

Another object of the present invention is to provide an air-operated fluid-pump wherein the motive-power for said pump may be secured from the same compressedair-line which is used to operate the spray-gun or nozzle to which said fluid is supplied.

An additional object of the present invention is. to pro- 1 2,846,123 Patented Aug. 5, 1958 vide a paint-mixing and dispensing system wherein the paint-pumping and mixing apparatus may be located remotely from the spray-booth or point of application where the spray-gun or nozzle is operated. An aspect of the present invention is a novel. method in which the paintagitating pump is mounted eccentrically upon the original merchandising container so that the paint-fluid or ingredients, at any point within the original container, may be thoroughly agitated and mixed.

A further aspect or phase of the present invention is a novel arrangement of valves and supply-lines whereby completely mixed paint may be supplied to a spray-gun or nozzle without the danger of foreign matter or sedimentation clogging up the system and which permits the entire system to be shut down or be rendered inoperative for prolonged periods of time and thereafter to be once again operated without the necessity of dismantling the entire system and cleaning the same before thoroughly mixed paint may be supplied to the spray-gun or nozzle.

Other phases, aspects and features of the present invention will appear more fully from the accompanying drawings, and the following description, reference being had to the accompanying claims to define the scope of my invention.

In the accompanying drawings, in which like reference characters indicate like parts;

Figure 1 represents a perspective view of the portable single-line embodiment of the present invention.

Figure 2 represents a perspective view similar to Figure 1, partly broken away.

Figure 3 represents a top plan view of the embodiment of Figures 1 and' 2.

Figure 4 represents a side elevational view, partly broken away.

Figure 5 represents a horizontal cross-section on line 5-5 of Figure 1 showing the rotary air motor and the manually operable air-regulating valve.

Figure 6 represents a horizontal cross-sectional view of the air pressure regulator or adjustable air-pressure reducing valve, taken generally on line 6-6 of Figure 4.

Figure 7 represents a vertical elevational view, partly broken away, of a dual-line paint-circulator, being another embodiment of the present invention.

Figure 8 represents a top plan view of the same.

Figure 9 represents a top plan view of the pumping unit forming a part thereof.

Figure 10 represents a vertical cross-sectional view of the pump unit taken generally on line 1010 of Figure 9, but with the air-motor not in section.

Figure IO-a represents an enlarged vertical section of the pump shaft-seal shown in Figure 10.

Figure 10-b represents a vertical cross-sectional view of a modified form of connection between the pump and drive shaft.

Figure 11 represents a similar vertical cross-sectional view at from that shown in Figure 10, and taken generally. on line 11-11 of Figure 10.

Figure 12 represents a section on line 12-12 of Figure 10.

Figure 12-a represents a cross-sectional view generally along lines 12w12-a of Figure 10.

Figure 13 represents a plan view of the underside of the dual-line paint-circulating embodiment of the present invention, viewed from underneath.

Figure 14 represents a vertical cross-sectional view of the paint-return control valve, taken generally on line 1414 of Figure 8.

Figure 15 represents a vertical cross-sectional view taken generally on line 15-15 of Figure 8.

Figure 16 represents a fragmentary vertical cross-sectional view taken generally on line 16-46 of Figure 8,

showing the roller support for the unit, for resting it upon the edge of a drum, together with one of the levelling screws or elevating screws, by means of which the unit may be adjusted upon the drum both for height as well as for levelling.

Figure 17 represents a diagrammatic view showing an installation of the dual-line paint-return embodiment of the present invention.

Figure 18 represents a top plan view, partly in horizontal cross-section on line 1818 of Figure 19, showing a modified embodiment of the present. invention, which maybe used with either a single line or a dual line form of the invention.

Figure 18-6: represents an enlarged section of the return-valve shown in Figure 18, with the valve turned 90 from the position shown in Figure 18.

Figure 19 represents a vertical cross-sectional view of the embodiment shown in Figure 18, taken generally on line 19-19 of Figure 18, but with the air-motor not sectioned.

Figure 20 represents a vertical cross-sectional view of the embodiment shown in Figures 18 and 19, but taken at a right angle to the section shown in Figure 19, namely, generally on line 2020 of Figure 19.

Figure 21 represents a section on line 2121 of Figure 19.

Figure 22 represents an enlarged view of the front elevation of the circulating junction-member shown in Figure 17.

Figure 23 represents a vertical section along lines 2323 of Figure 22.

Figure 24 represents a front elevation of the 3-way valve used in the dual-line system of Figure 17.

In the embodiment of the present invention shown in Figures 1 to 6 and 9 to 12 inclusive, the original shippers container 30, containing the paint, is placed upon a wheeled, portable base 31 mounted upon three or more casters 32.

The pump-supporting and paint-enclosing shield 33, including a generally cylindrical body 34, and a dome like top 35, is placed over the paint container 30, and held in place upon the base 31 by a plurality (3 or 4) of elongated flat retainer-lugs 36, which can be turned so as to overlie the horizontal basal flange 37 of the cylindrical side wall 34 of the shield, and which can then be tightened in place by turning the knurled nuts 38 on the screw-studs 39 carried by the base 31. By loosening the nuts 38 slightly and then turning the lugs 36 tangentially, they will clear the flange 37 so as to permit the removal of the shield 34 and the pumping unit carried thereby.

A pair of handles 40 may be provided to facilitate the handling of the shield and the pumping unit carried thereby.

In the top 35 of the shield 33, an aperture 41 is provided, as indicated particularly in Figure 11, over which the motor and pump supporting distributor-head 42 is mounted, preferably off center, as shown in Figures 3 and 4, and held in place by a plurality of screw-studs, 4-3, preferably welded or otherwise secured to the top 35, around the opening 41 therein, and the nuts 44, engaging the basal flange 45 of the distributor-head 42.

The distributor-head 42 comprises an upwardly extending motor-support 46, including the horizontally disposed motor-retainer ring 47, in which the coaxial hub 48 of the motor housing 49 is disposed, and held in place by one or more set screws 50.

Motor 4-9 is preferably a multi-vane rotary air motor as shown particularly in Figure 5, including the rotor 51, and vanes 52, which are held out by centrifugal force, and also by air pressure, against the side Wall of the eccentric motor chamber 53.

To the inlet port 54 of the air-motor, a control valve housing 55, is screw-threadedly secured (as shown in Figure having a valve seat 56, and having the airinlet opening 57, entering into the valve housing 55,

4 beyond the valve seat 56. The needle valve 58, is carried by a valve stem 59, screw-threaded into the bore 60 of the valve housing 55. The valve stem 59 has an outer extension 6.1, containing a peripheral ring-receiving groove 62, in which an O-type sealing ring 63 is disposed, for making a slidable air-tight seal between the cylindrical valve-stem extension 61 and the inner cylindrical bore 64 of the valve housing 55. An externally knurled cap 65 is mounted upon the outer extension of the valve stem, and secured thereon by means of the set screw 66, whereby the valve stem and valve may be rotated.

The sleeve-like extension 67 on the control cap or knob 65 overlaps the valve housing 55, as shown more particularly in Figure 5, and is formed with a thin tapered edge adjacent to said valve-body, along which thin-tapered edge graduated marker-lines are provided, which may be numbered, as shown, particularly, at 68, in Figures 3 and 10, which numbered graduations may then be set against the pointer or zero line 69 on the top of the valve-body 55, for any desired selective setting of the air-control valve, thereby to obtain any desired motor speed and paint delivery rate.

The air discharge port 79 of the air-motor 49 may be provided with any desired mufller 71 having a series of radial apertures 72, distributed around its circumference, through which the exhaust air may be dispersed.

In axial alignment with the motor shaft 73, is a journalbushing or bearing-bushing 74, screw-threadedly or otherwise mounted, as at 75, in the housing 42, and having a bearing sleeve 76 therein, for journalling the transmission shaft 77.

The transmission shaft 77 is of a slightly larger diameter below the shoulder 78 thereof, and has its lower end provided with an axial here to a suitable depth, across which a keying slot at 79 is provided; said axial bore being adapted to receive the upper end of the pump drive shaft 80. A transverse pin 81, extending through the upper end of the pump-shaft 3t}, enters the slot 79, to key the pump-shaft to the transmission-shaft 77, against relative rotation. This keying may, alternatively, be affected by securing a collar 167 to the pump shaft, by means of a set screw as 1674: and having a pair of lugs 10741 extending upwardly from said collar into the slot 79, as shown in Figure 10-5.

The pump, designated generally by the numeral 82, may be supported in generally rigid relationship to the housing 42, by a single tubular paint delivery pipestaznl or riser tube 83, the upper end of which is screw-tl'lreaded or otherwise rigidly secured into the intake-opening 31 of the housing 42, as by the screw threads 85, and the lower end of which is similarly secured into the threaded opening 86 of the pump-housing 32.

An axially slidable metallic sleeve 87 is placed over the reduced-diameter upper portion of the transmission shaft 77, directly beneath the journal bushing 74, and said sleeve 87 has an internal ring-receiving groove 88, shown particularly in Figure l0-a into which an O-ring is placed, for forming a static seal between the transmission shaft 77 and the metallic sleeve 87. The upper edge 89, of the sleeve 87, is held against the underside 90 of the bushing 74, both by the spring 91 as well as by the pressure of the paint or other fluid passing through the inlet chamber 84, and thereby forming a metal-to-metal hydraulic seal between sleeve 87 and the bushing 74, and hence between the transmission shaft 77 and the bushing 74. The bushing 74, is, in turn, sealed to the housing 42, by any suitable gasket 92 interposed between the head of the bushing and the seat 93 of the housing.

A Z-pronged flexible coupler collar 95 is mounted upon the lower end of the motor-shaft 73, by means of the set screw 96, and a similar 2-pronged flexible coupler collar 97 is mounted on the upper end of the transmission shaft 77 and held thereon by the set screw 98, with a four-pronged rubber, leather or other resilient disc 99 auras intermediate the collars 95 and 97 to form a more or less resilient connection between the motor shaft 73 and the transmission shaft 7 7 The pump housing 82 has a lower bearing plate 100 secured thereto by suitable screws 101.

The drive shaft 80 of the pump is journalled at its upper end in the bearing sleeve 102, at the top of the housing, and journalled in the bearing opening 104, in the bearing plate 100.

A ball thrust bearing 105 is mounted upon the upper end of the drive shaft 80 of the pump intermediate the upper surface 106 of the pump housing, and the lower end of the transmission shaft 77 or between said housingsurface 106 and the lower surface of the coupling collar 107, thereby to give vertical support for the transmission shaft 77.

An inlet port 109 (Figure 12-a) is provided, through the bearing plate 100, which communicates with the intake chamber 110 of the pump-housing 82.

The idler shaft 111 is stationarily supported at its upper end in a corresponding recess 112 in the pump housing 82, while its lower end is similarly supported in the recess or aperture 113 in the bearing plate 100. A driving gear 114 is keyed or otherwise secured to the drive shaft 80 of the pump, while a like idler gear 115 is journalled on the stationary idler shaft 111. The gears 114 and 115 are in mesh with each other and revolve in opposite directions, as indicated by the arrows 116 and 117, respectively, thereby propelling the paint from the intake chamber 110 towards the discharge chamber 118, which discharge chamber 118 extends vertically upwardly through the stationary spacer block 119 and through the upper horizontal wall 120 of the pump housing 82, and thus communicates with the interior of the pipe-transmission and pump-supporting standpipe or riser tube 83.

A paint agitating and pump charging propeller 121 is mounted upon the lower extension of the drive shaft 80 of the pump 82, exteriorly or below the bearing plate 100, and is keyed thereto by means of the pin 122 which extends through the shaft 80 and enters corresponding recesses or slots in the hub of the propeller, as shown particularly in Figure said propeller being held on the shaft 80 by means of a cap nut 123 screw-threadedly secured to the outer end of the shaft 80.

The propeller 121 is oif center in respect to the axis of the paint container 30, and is near the bottom of said paint container, thus serving to agitate and stir the paintcontents of the container 30, at all times, while the apparatus is in operation, thereby to maintain uniform consistency of the paint and to prevent the settling out of pigment or other solid constituents of the paint. The propeller 121 also serves to prime the pump 82 and to keep it well charged at all times; the propeller being beneath and in operative alignment with the intake port 109 in the bearing plate 100. By reason of the off center disposition of the propeller 121 in respect to the shield 34, or in respect to the pump supporting member 35, and by reason of the propeller 121 being near the bottom of the paint container 30, the propeller not only stirs the paint in the comparatively small vertically projected area of the propeller, but also throughout the entire paint mass, because it creates a circulation of the paint within the container which will cause the stirring or mixing action of the propeller 121 to become effective throughout the mass of paint Within the container; bringing paint from the remotest part of the container to the propeller. If a pail of paint has settled out to any extreme extent, by reason of its having been left undisturbed for a long time in one position, the pump-carrying cover or shield 35 may be rotated manually, slowly, to bring the propeller 101 around to difierent parts of the container, so as to bring it into more direct contact with any very viscous sedimentation, until such viscous sedimentation has been 6' disbursed suificiently to permit the free fluid-circulation within the container under the influence of the propeller.

The height of the spacer 119 and the height of the gears 114 and is such that their combined height or axial dimensions will approximately equal the height of the gear chamber 125 within the pump housing 82. By varying the relative axial dimensions of spacer 119 and gears 114 and 115, respectively, the displacement of the pump may be varied to suit any requirements (with the seat of rotation remaining the same).

By-passageway 126 is extended from the discharge chamber 118 of the pump, down through a by-pass port 127 in the bearing plate 100, past a ball check valve 128. The spring-tension ball check valve 128 permits the bypassing of the paint, from the pump, directly back into the container 30, if the pressure developed within the pump exceeds the pressure for which the check valve is set.

A second by-pass valve is also provided in direct communication with the intake chamber 84 of the housing 42 (as shown in Figure 10, with a similar valve shown on larger scale in Figure 14), said by-pass valve including the valve seat 129, against which the ball check valve 130 is seated by the compression spring 131 which is interposed between the shoulder 132 on the valve-closing stem and valve-adjusting stem 133 and the ball 130. The stem 133 is provided with a ring-receiving groove 134 in which an O-ring 135 is exposed, for forming a slidable hydraulic seal between said stem and the cylindrical bore 136 within the housing 42, which bore forms a part of the by-pa-ss valve. The outer portion 137 of the stem 133 is reduced in diameter and threaded, and is threaded through the bushing or gland 138, which, in turn,is screwdhreadedly secured to the housing as at 139. At the outer end of the stern 133 a knurled knob 140 is secured, whereby the stem 133 may be rotated.

By turning the knob 140, the compression of the spring 131 may be varied to vary the hydraulic pressure under the influence of which the valve 130 will be unseated from its seat 129, while the inner extension 141 of the stem 133 can also be made to bear directly against the ball 130, so as positively to seat it against its valve-seat 129, thereby to form a tight closure, without any bypassing possibilities.

T he by-pass valve 128 in the pump 82 is preferably set at a relatively high limit, so that the by-passing pressure may be adjusted by means of the variable tensioning of the spring 131, if a by-passing pressure is desired below the by-passing pressure for which the valve 128 is set; whereas if the valve 130 is positively held against its seat 129, then the by-pass valve 128 will serve as the safetyrelease for the pump.

The discharge port 142 of the by-pass valve in the housing 42, is directed downwardly and discharges directly into the paint container 30, or it may have a short pipe-extension connected therewith and extending downwardly into the paint container.

The intake chamber 84 in the housing 42 has one large side-opening shown particularly in Figure 11, against which a diaphragm 143 is placed, held in place between the flat diaphragm-seat on the housing 42, surrounding the side opening of chamber 84, and the corresponding flat seat on the juxtaposed face of the gauge block 144. The chamber and passageway 145 are within the gauge block 144, in communication with the gauge-side of the diaphragm 143, and are filled with a suitable hydraulic oil, so that the pressure gauge 146, carried by the gauge block 144, will indicate the pressure of the paint in the chamber 84, without the paint actually entering the Bourdon Tube of the gauge 146.

To the discharge-passageway 147 of the housing 42, a shut off valve 148 is connected, and to it, in turn, a filter or strainer 149 is connected. A hose 150 is, in turn, connected to the discharge side of the strainer 149.

The hose 150 is connected to the paint-inlet 151 of the paint gun 152.

The air-supply hose 153 (connected to any suitable supply of compressed air) is connected to a pipe fitting 154 and to the pressure-reducing and regulating valve housing 155. The valve housing 155 is secured to the upper shield member 35, by a screw-post or stud 156, the upper end of which is screwed into a suitable blind aperture in the housing 155, and the lower end of which is extended through the upper shield 35 and fastened thereto by the nut 157. A copper tubing or other suitable conduit 158, preferably with a loop therein to allow for adjustment, is interposed between side opening 159 in the fitting 154, and the inlet opening 57 on the motor-control valve housing 55.

The pressure reducing control valve (shown particularly in Figure 6) includes a small-diametered valve seat 160, against which a suitably gasketed valve 161 is urged by the spring 162, and the air pressure against diaphragm 163, the valve 161 tends to be unseated by one or more larger compression springs 164 interposed between said diaphragm 163 and the spring plate 165 on the vented side of the diaphragm 163 within the cap 166 of the pressure regulator 155. The spring plate is in turn, backed up by the regulator screw 167. The valve 161 has a valve stem 168, the end of which abuts the rivet 170, which connects the spring-saddle 169 to the diaphragm 163. Thus, when the pressure is low, the springs 164 will unseat the valve 161, to permit the passage of the air in the direction indicated by the arrows (Figure 6), while when the air pressure is increased ,the air pressure, acting upon the diaphragm 163, overcomes the force of the springs 164, and permits the weaker spring 162 to re-seat the valve 161 and thereby shut the air oif. The regulation is affected by the seating and unseating of the valve 161, in this manner, by the maintenance of said valve in a slightly un-seated position in respect to the valve seat 155.

By changing the position of the screw 167, the pressure of the air on the discharge side 171, of the valve 161 can be adjusted.

To the regulated side or chamber 171, a pressure gauge 172 is connected to indicate the pressure of the air being actually delivered to the paint gun 152 through the hose 173 and to the shut off valve 174.

The paint strainer 149 (shown particularly in Figure includes a fine-mesh wire-screen cylinder 175, the upper end of which is held in a suitable recess 176 surrounding the inlet passageway 177 of the housing 149, while the lower end is held in a similar recess in a removable screw plug 178 in the lower end of the screen chamber 179. The paint enters into the cylindrical wirescreen 175, and passes outwardly there-through into the chamber 179, and then out into the discharge passageway 138, and then to the paint hose 150.

An access opening 181 (Figures 3 and 8) is provided in the upper shield member 35, over which a closure disc 182 is pivotally secured by means of the pivot belt or screw or rivet 183; the closure-disc 182 being provided with a knob 184 at a point opposite tothe pivot 183, so that it may be swung to either side to uncover the access opening 181.

A plurality of hose-retaining brackets 185 may be provided around the side wall 34 of the shield 35, in the manner indicated in Figure 1, joined at their upper ends by a ring 186 to form a hose-storage rack, into which the hoses d and 173 may be coiled when the apparatus is not in use.

in the dual-line paint-circulating embodiment of the present inventio-n (shown particularly in Figures 7, 8 and 13 to 17 inclusive), only the upper pump-supporting shield member 35 is used, to the depending flange of which the handles 49 are secured, and which is supported upon the rim of the original paint container such as the drum 30, as shown particularly in Figure 7 and Figure 16.

In this embodiment, the pump-supporting shield 35 is preferably not rested directly upon the upper rim or bead 187 of the paint drum 30, but is, instead, adjustably supported upon a pronged spider 188, (having 3 or more suitable metal legs) by means of a corresponding number of adjustment screws 189. Each of the screws 189 is extended through a corresponding leg of the spider 183 near the outer end, and is screw-threaded therein. The upper end of the screw 189 has two successively enlarged diametered portions 190 and 191, respectively; portion 191 passing through a correspondingly diametered hole 19?; in the horizontal surface of the shield 35. A washer 193 may be interposed between a shoulder intervening the portions 190 and 191 of the adjustment screw and the shield 35, to cover over the hole 192 and to prevent dirt going through said hole. A washer 194 rests on a cotter-pin or other fastening device 195, and serves to take the weight of the shield 35 and the pump carried thereby and to transmit it to the screw 189, thereby to support said shield and the pump upon the spider 188. To the outer ends of each of the legs of the spider 188 a roller 196 is rotatably secured upon an axle or pin 197 held by an inverted U-shaped yoke or bracket 199 the inverted base of which is fastened to the underside of the leg of the spider 188. The rollers 196, in turn, rest upon the edge 187 of the drum 3d. The axis of the roller is generally in a radial direction. The outer leg 200 of the inverted U-shaped bracket or yoke 199 is preferably longer so as to extend down beneath the upper edge of 137 of the drum 30, thereby to prevent any roller 196 from leaving said edge.

By turning the handle 201 of the adjustment screws 139 the pump support 35 can be raised or lowered within the limitations of the screws 189 and can be leveled, notwithstanding any unevenness of the edge 187 of the paint-drum 30. This permits the leveling of the pump support 35, to compensate for any irregularities in the floor upon which the paint-drum 30 rests or to compensate for any other unevenness in alignment.

Because of the roller-support, the shield 35, together with the pump carried thereby, may be rotated to and fro, in respect to the paint-drum 30. By this means the hose-outlets may be directed in the direction of the wall upon which the pipe connections are mounted. By this means, also, the propeller 121 may be re-located in the drum, if necessary, to dislodge unusually heavy sedimentations.

In the dual-line embodiment, the paint-delivery line 150, instead of being attached directly to the spray-gun 152, may be connected to one side of a 3-way valve 229 as is shown in Figure 17. The valve 220 may be fastened to the wall of the paint-mixing room where the drums 30 containing the paint are customarily stored.

A plurality of the drums 30 and the pumping units may be connected to the 3-way valve 220, and the handle 221 thereon may be operatively disposed so as to connect the discharge hose from one or the other of the drums attached to the 3-way valve 220. The outlet of the 3-Way valve 220 may be operatively connected to the paint-delivery line 206 which carries the paint from the paint-mixing room to the remotely positioned spray-booth where the spray-gun 152 is operated.

Thus, by means of the 3-Way valve 228, the paintdelivery line 206 is connected to each of two similar paint-delivery hoses 150, either of which may then be connected, alternatively, into the line 206 by turning the handle 221 in either of its two opposed extreme positions, to connect either one or the other of the hose lines 150, and hence either one or the other of the paintdrurns 30, to the paint-delivery line 206. Similarly, by means of another 3-way valve 220, a paint-return line 208 (which brings unused paint from the spray-booth back to the paint-mixing room) may be, alternatively, connected to either one or the other of two similar paintreturn hoses 209 and hence to either one or the other drum of paint into position or notwithstanding the need for mixing a batch of paint for the particular painting operation; one of the paint-supply pumps being in operation when the other one is disconnected.

The paint-delivery line 206 and the paint-return line 208 are each connected, remotely from the paint-mixing room and adjacent the spray-booth where the spray-gun 152 is to be operated, to a circulating junction-member 203 mounted upon the wall or other support near where the spray-gun 152 is to be used. The circulating junction-member 203 has a circulating passageway 204 therethrough, to the inlet side 205 of which the paint-delivery line 206 is connected and to the outlet side 207 of which the paint-return line 208 is connected.

The circulating junction-member 203 is provided with a paint-outlet 215 to which the paint-delivery hose 150a is connected and through which the paint is delivered to the spray-gun 152, as shown more clearly in Figure 17. In the dual-line paint-circulating system shown in Figure 17, the compressed air is supplied to the spray-booth and paint-mixing room through a pipeline 153-a which is remotely attached to an air-comshield member 35); which pressure-reducing regulators 6 155-a are of the same construction as that shown in Figure 6, and are in turn, connected, respectively, to the air-supply line 173-a attached to the spray-gun 152, and to the air-supply line 153 of the paint-pumps mounted on the drums in the paint-mixing room. A watereliminator and air-filter 217 may be interposed in the air-line leading to the 'hose 173a and to the hose 153.

The circulating junction-member 203 is also provided with a hydraulic pressure-gauge 218 connected thereto by a diaphragm 219, similar to the diaphragm 143 as shown in Figure 11.

Two paint-dispensers or spray-guns 152 in the dualline embodiment, may be connected to the same paintdelivery line 206 and to the same paint-return line 208 by separate circulating junction-members 203, as is shown in Figure 17.

The paint-return lines 209, which bring the un-used paint back to the drums 30, may be connected to the by-pass valve-housing 210 mounted upon the shield nected to the discharge port 142 thereof, extends down into the paint-drum 30, as indicated particularly in Fig ure 7, so as to cause the returned paint to enter the drum 30 somewhere near the bottom thereof and to help the circulation and the intermingling of the return-flow with the main body of fluid in the drum.

Within the valve-housing 210, an inverted T-shaped air-passageway 212 is formed (asshown in Figure 15), independently of the paint-return and by-pass passageways (shown in Figure 14). To one side of the T-shaped air-passageway 212, the air-supply hose 153 is connected, while to the other side the air-delivery pipe or copper tubing 158 is connected which leads to the inlet opening 57 of the motor-control valve 55. An air gauge 214 is connected to the third leg of the T to indicate the air-pressure being delivered to the air-motor 49. This housing 210 may be secured to the pump-head by means of suitable bolts 213.

When two or more spray-guns 152 are used, the circulating junction-members 203 may be placed in parallel, as shown in Figure 17, or, if the painting operation with '10 two spray guns is carried on in approximately the same general location, a series connection of the circulatingjunction members may be used.

By the dual-line embodiment, uniformity of paintis more nearly assured at the point of application, because any intermittent operation of the spray gun will yet not point of delivery, notwithstanding prior sedimentation during the shut-down.

In the embodiment shown in Figures 18 to 21 iiiclusive, the pump 82 is supported by a pair of pipes of smaller diameter, such as the paint-delivery pipe or riser tube 83-a and the paint by-pass pipe 211-a, neither one of which encases the transmission shaft 77. Thus the paint-delivery pipe 83-01 is screw-threadedly or otherwise rigidly connected to the discharge port 1118-11 of the pump housing, while its upper end is similarly rigidly connected to the intake port 84-a of the housing 42. Bypass-return pipe 211-0 is, in turn, rigidly connected to the discharge port 142 of the paint-bypass valve in the housing 42, by screw-threadedly engaging thereinto or otherwise being secured thereto, while the lower end of said bypass-return pipe 211-a is passed through an opening 223 extending through the pump housing 82 and through the bearing plate 100, and secured therein by the set screw 224 threaded through the side of the pump-housing 82 and locked against the pipe 211-a. By this means the pump is supported by the two parallel pipes 83-a and 211-a; the former serving to deliver the paint from the pump upwardly while the latter serving to return the paint downwardly and discharging it above the propeller.

In this embodiment shown in Figures 18 to 21 inclusive, a 3-way plug valve 25 having handle 226 is interposed between the paint inlet 84-01, and the bypass valve 130, and circulating paint-return port 227, to the threaded inlet of which a paint return hose 209 may be connected from a circulating-junction member like the circulating-junction member 220 shown in Figure 17.

Thus, by turning the 3-way valve 225 into the position shown in Figure 18, the apparatus will function as a singleline embodiment, while when turning the valve 225 into the position shown in Figure 18-0; the apparatus will function as a dual-line embodiment; being connected, in the latter setting, to a circulating-junction member 220 by means of lines and 209, respectively.

Reference to paint, in the foregoing description and in the following claims, is intended also to comprehend liquids which are not paints but which may be handled and dispensed by the apparatus so described and claimed.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. Liquid-handling apparatus for delivering liquid from an original open container to a remote liquid dispenser, said apparatus comprising a lid to be placed over the original container of liquid and a rotary gear-pump and rotary agitator disposed beneath said pump, both pump and agitator carried by and supported beneath said lid and operatively extending into the liquid, and a single motor operatively connected to both said pump and said agitator.

2. Liquid-handling apparatus for delivering liquid from an original open container to a remote liquid dispenser, said apparatus comprising a lid to be placed over the original container of liquid and a rotary gear-pump and rotary agitator carried by and supported beneath said lid and operatively extending into the liquid, and a single motor disposed above and operatively connected both to said pump and to said agitator, said pump and said agitator being constructed and arranged so that the agitator will be disposed beneath and in close proximity to the inlet of said inlet pump.

3. A motor-driven apparatus for handling paints and the like which contain fine, solid particles capable of settling out and for delivering such paints or the iilre from original open containers, which apparatus includes a gear-pump having its inlet arranged to be extended into the original container, from above, into proximity of the bottom of the container, and a rotary agitator carried by and beneath said pump and operatively connected to and beneath the motor and driven simultaneously thereby.

4. Dispensing apparatus for delivering paint or the like under pressure from an original open container, which apparatus includes an air motor, a gear pump operatively connected to and beneath said air motor and having its inlet extending downwardly so as to be capable of being inserted into the original container into proximity of its bottom, and a rotary agitator operatively connected with and disposed beneath said pump to be driven simultaneously therewith.

5. Dispensing apparatus for delivering paint or the like under pressure from an original container to a remote dispenser, said apparatus including a riser tube, a gear-pump operatively connected to the bottom of the riser tube, a rotary agitator carried by said riser tube and operatively connected to and disposed beneath said pump to be actuated thereby, and a by-pass between the discharge side of said pump and delivery outlet of said apparatus for the return of the paint from the discharge side of the pump back into the container from which it was pumped, and a regulator for regulating the by-pass pressure, and a motor operatively connected to and disposed above said pump for driving said pump and said agitator.

6. A liquid-handling apparatus for delivering liquid from an original open merchandising liquid-container to a remote liquid dispenser, said apparatus comprising a base-portion adapted to support said original liquidcontainer, a housing-member secured on said base-pen tion in an enveloping relation to said original liquidcontainer, a pump-support disposed on said housing member having an air-motor affixed thereto, a shaft operatively connected to said motor and supported by said pump-support and depending beneath said pump-support and within said housing member into said original container, a riser-tube surrounding said shaft and supported by said pump-support, a fluid-pump operatively connected to said shaft and said riser tube within said eontainer and adjacent the bottom thereof, whereby the liquid in said container may be withdrawn by said pump through said riser-tube, a hose-member connected to the discharge end of said riser-tube through a passageway within said pump-support and an agitator operatively connected to said shaft beneath said pump.

7. A liquid-handling apparatus for delivering liquid from an original open merchandising liquid-container to a remote liquid dispenser, said apparatus comprising a base-portion adapted to support said original liquid-container, a housing-member secured on said base-portion in an enveloping relation to said original liquid-container, a pump-support disposed on said housing member having an air-motor affixed thereto, a shaft operatively conne Mi to said motor and supported by said pump-support and depending beneath said pump-support and within said housing member into said original container, a riser-tube surrounding said shaft and supported by said pump-support, a fluid-pump operatively connected to said shaft and said riser-tube within said container and adjacent the bottom thereof, said pump including a by-pass passageway having a check-valve therein, through which the liquid may be circulated when the liquid-pressure in said riser-tube exceeds the by-pass pressure of said check-valve, whereby the liquid in said container may be withdrawn by said pump through said riser-tube, a hose-member in liquid communication with the discharge end of said risertube supported by said pump-support and an agitator operatively connected to said shaft beneath said pump.

8. A liquid-handling apparatus for delivering liquid from an original open merchandising liquid-container to a remote liquid dispenser, said apparatus comprising a base-portion adapted to support said original liquid-con- ,tainer, a housing-member secured on said baseportion in an enveloping relation to said original liquid-container, a pump-support disposed on said housing member having an air-motor afiixed thereto, a shaft operatively connected to said motor and supported by said pump-support and depending beneath said pump-support and within said housing member into said original container, a riser-tube surrounding said shaft and supported by said pump-support, a fluid-pump operatively connected to said shaft and said riser-tube within said container and adjacent the bottom thereof, whereby the liquid in said container may be withdrawn by said pump through said risertube, a hose-member in liquid communication with the discharge end of said riser tube supported by said pump-support, a by-pass passageway having a check-valve therein within said pump-support through which liquid may be circulated when the fluid-pressure in said hose-member exceeds the by-pass pressure of said check-valve, and an agitator operatively connected to said shaft beneath said pump.

9. A liquid-handling apparatus for delivering liquid from an original open merchandising liquid-container to a remote liquid dispenser, said apparatus comprising a baseportion adapted to support said original liquid-container, a housing-member secured on said baseportiou in an enveloping relation to said original liquid-container, a pump-support disposed on said housing member having an air-motor afiixed thereto, a shaft operatively connected to said motor and supported by said pump-support and depending beneath said pump-support and within said housing member into said original container, 21 riser-tube surrounding said shaft and supported by said pump-support, a fluid-pump operatively connected to said shaft and said riser-tube within said container and adjacent the bottom thereof, whereby the liquid in said container may be withdrawn by said pump through said riser-tube, a hose-member in liquid communication with t e discharge end of said riser-tube supported by said pump-support, a by-pass passageway having a check-valve therein Within said pump-support through which liquid may be circulated when the fluid-pressure in said hose-member exceeds the bypass pressure of said check-valve, said check-valve including means whereby the by-pass pressure of said passageway may be adjusted or regulated and an agitator operatively connected to said shaft beneath said pump.

10. A liquid-handling apparatus for delivering liquid from an original open merchandising liquid-container to a remote liquid dispenser, said apparatus comprising a base-portion adapted to support said original liquid-container, a housing-member secured on said base-portion in an enveloping relation to said original liquid-container, a pump-support disposed on said housing member having an air-motor afiixed thereto, said air-motor including means whereby the speed of said motor may be adjusted or regulated, a shaft operatively connected to said motor and supported by said pump-support and depending beneath said pump-support and within said housing member into said original container, a riser-tube surrounding said shaft and supported by said pump-support, a fluid pump operatively connected to said shaft and said risertube within said container and adjacent the bottom thereof, whereby the liquid in said container may be with drawn by said pump through said riser-tube, a hosemember in liquid communication with the discharge end of said riser-tube supported by said pump-support, and an agitator operatively connected to said shaft beneath said pump.

11. A liquid-handling apparatus for delivering liquid from an original open merchandising liquid-container to a remote liquid dispenser, said apparatus comprising a base-portion adapted to support said original liquid-container, a housing-member secured on said base-portion in an enveloping relation to said original liquid-container, a pump-support disposed on said housing member having an air-motor aflited thereto, a shaft operatively connected to said motor and supported by said pump-support and depending beneath said pump-support and within said housing member into said original container, a risertube surrounding said shaft and supported by said pumpsupport, a fluid-pump operatively connected to said shaft and said riser-tube within said container and adjacent the bottom thereof, said pump including a pair of enmeshed gears, one of which is operatively connected to said shaft' and rotates therewith and the other of which idly rotates upon a stationary shaft within said pump in operative juxtaposition to said first-named gear, said gears being exchangeable within said pump for gears of selectively different lengths, whereby the fluid-capacity of said pump may be varied, whereby the liquid in said container may be withdrawn by said pump through said riser-tube, a hose-member in liquid communication with the discharge end of said riser-tube supported by said pump-support, and an agitator operatively connected. to said shaft beneath said pump.

12. A liquid-handling apparatus for delivering liquid from an original open merchandising liquid-container to a remote liquid dispenser, said apparatus comprising a base-portion adapted to support said original liquid-container, a housing-member secured on said base-portion in an enveloping relation to said original liquid-container, a pump-support disposed on said housing member having an air-motor afiixed thereto, a shaft operatively connected to said motor and supported by said pumpsupport and depending beneath said pump-support and within said housing member into said original container, a riser-tube surrounding said shaft and supported by said pump-support, a fluid-pump operatively connected to said shaft and said riser-tube within said container and adjacent the bottom thereto, whereby the liquid in said container may be withdrawn by said pump through said riser-tube, a hose-member in liquid communication with the discharge end of said riser-tube supported by said pump-support, a return-line from said dispenser to said original container through which the unused liquid may be returned to said orginal container, said return-line including an adjustable valve whereby the liquid will not be returned to said original container until the fluid-pressure in said return line exceeds the by-pass pressure of said valve, and an agitator operatively connected to said shaft beneath said pump.

13. In a paint-mixing and paint-dispensing apparatus, a housing-member adapted to rest upon the upper edge of an original merchandising container, adjustable means operatively connected to said housing member whereby the plane of said housing-member may be adjusted with respect to the plane of the edge of said original merchandising container, a pump-support disposed on said housing member having an air-motor affixed thereto, a shaft operatively connected to said motor and supported by said pump-support and depending beneath said pumpsupport and said housing member into said original cont'ainer, a riser-tube surrounding said shaft and supported by said pump-support, a fluid-pump operatively connected to the lower end of said shaft and said riser-tube within said container and adjacent the bottom thereof, whereby the liquid in said container may be withdrawn by said pump through said riser-tube, a hose-member in liquid communication with the upper discharge end of said riser-tube supported by said pump-support, and a rotary agitator operatively connected to said shaft beneath said pump. 7

14. In a paint-mixing and paint-dispensing apparatus, a housing-member adapted to rest upon the upper edge of an original merchandising container, adjustable means operatively connected to said housing member whereby the plane of said housing-member may be adjusted with respect to the plane of the edge of said original merchandising container, a pump-support disposed on said housing member having an air-motor aflixed thereto, a shaft operatively connected to said motor and supported by said pump-support and depending beneath said pump-support and said housing member into said original container, at riser-tube surrounding said shaft and supported by said pump-support, a fluid-pump operatively connected to the lower end of said shaft and said riser-tube within said container and adjacent the bottom thereof, whereby the liquid in said container may be withdrawn by said pump through said riser-tube, a hose-member in liquid communication with the upper discharge end of said riser-tube supported by said pump-support, a fluid return-line operatively connected to the discharge end of said riser tube through which the unused liquid may be returned to said original container, said return-line having an adjustable valve therein whereby the liquid will not be returned to said original container until the fiuid-pres-- sure in said return-line exceeds the by-pass pressure of said valve, and a rotary agitator operatively connected to said shaft beneath said pump.

15. In a paint-mixing and paint-dispensing apparatus, a pump-support adapted to be positioned upon the upper open end of an original merchandising liquid-container, said support having a shaft rotatably journalled therein and extending therebeneath, a fluid-pump supported at the lower end of said shaft, a discharge conduit extending from said pump and connected to a fluid-passageway in said pump-support, a motor on said pumpsupport operatively connected to the upper end of said shaft, a discharge port in said pump-support through which the liquid may be discharged from said passageway and delivered to a liquid dispenser, an intake port in said pump-support to which the unused liquid may be returned from the dispenser, said intake port being operatively connected to said passageway in said support and through which said unused paint may be returned through a second discharge port to said original open container, and a valve-member in said passageway which selectively connects said conduit to the first-named discharge port or to the second-named discharge port, or which connects said intake port to said second-named discharge port.

16. In a liquid supply system, a pump-support disposed above the open end of an original merchandising fluid-container, a gear-pump operatively connected to said pump-support and disposed therebeneath in juxtaposition to the bottom of said original container, a rotary agitator operatively connected to and disposed beneath said pump, a liquid-delivery line and a liquidreturn line each connected to said fluid-pump and to a liquid dispenser, an air-motor mounted on said support above said pump and operatively connected to said pump, at least one air-control valve operatively connected to said air-motor, whereby a measured and controlled quantity of air may be supplied to the liquid dispenser.

17. In a liquid supply system, a pump-support disposed above the open end of an original merchandising fluidcontainer, a gear-pump operatively connected to said pump-support and disposed therebeneath in juxtaposition to the bottom of said original container, a rotary agitator operatively connected to and disposed beneath said pump, a liquid-delivery line connected to said fluid-pump and to a liquid dispenser, a liquid return-line operatively connected to said dispenser and to a passageway in said pump-support through which unused liquid may be returned to said original container, and a valve in said last-named passageway whereby the fluid-pressure in said return-line may be regulated, an air-motor mounted on said support above said pump and operatively connected to said pump, at least one air-control valve operatively connected to said air-motor, whereby a measured and controlled quantity of air may be supplied to the liquid dispenser.

18. In a liquid supply system, a pump-support disposed above the open end of an original merchandising fluid-container, a gear-pump operatively connected to said pump-support and disposed therebeneath in juxtaposition to the bottom of said original container, a rotary agitator operatively connected to and disposed beneath said pump, a liquid-delivery line connected to said fluid-pump and to a liquid dispenser, a liquid return-line operatively connected to said dispenser and to a passageway in said pump-support through which unused liquid may be returned to said original container, and a valve in said last-named passageway whereby the fluid-pressure in said return-line may be regulated, a second valve and bypass in said liquid-delivery line which selectively connects the delivery line to the last-named passageway whereby liquid may be circulated through said passageway from said pump back into said container without passing through said delivery-line, an air-motor mounted on said support above said pump and operatively connected to said pump, at least one air-control valve operatively connected to said air-motor, whereby a measured and controlled quantity of air may be supplied to the liquid-dispenser.

19. A paint-dispenser adapted for detachable mountting above and for use with a container which is open to the atmosphere, such as an original vendable merchandising container or the like containing paint and adapted to take in paint from the paint-supply in such container at atmospheric pressure and to deliver the paint to a sprayer at an elevated pressure, said paint-dispenser including a detachable supporting-cover, a pump carried by said cover at a level so far beneath said cover that said pump wiil be emersed in the paint in proximity to the bottom of the container, said pump having its intakeport facing downwardly, a discharge conduit connected with the discharge-port of said pump and extending upwardly and through said cover, a compressed-gas motor carried by said cover, a power-delivery rod extending from said motor to said pump and arranged to propel the latter, a compressed-gas line connected to said motor, a compressed-gas-propelled agitator having its agitator member at a level in proximity to the level of the intakeport of said pump and having its motor above the paintlevel, said compressed-gas-propelled agitator being connected to the aforesaid compressed-gas line, a return-conduit emptying into said container and communicating with said pump-discharge conduit, and an adjustable flow-restrictor in said return-conduit for regulating the pressure of the return-flow.

20. A dual-line circulating paint-dispenser adapted for detachable mounting above and for use with a container which is open to the atmosphere, such as an original vendable merchandising container or the like containing paint and adapted to take in paint from the paintsupply in such container at atmospheric pressure and to deliver the paint at an elevated pressure to a circulating junction member near a spray-gun, to which circulating junction member such spray-gun is connected, said dispenser including a detachable supporting-cover, a pump carried by said cover at a level so far beneath said cover that said pump will be emersed in the paint in proximity to the bottom of the container, said pump having its intake-port facing downwardly, a discharge conduit connected with the discharge-port of said pump and extending upwardly and through said cover, a compressed-gas motor carried by said cover, a power-delivery rod extending from said motor to said pump and arranged to propel the latter, a compressed-gas line connected to said motor, a compressed-gas-propelled agitator having its agitator member at a level in close proximity to the level of the intakeport of said pump and having its motor above the paint-level, said compressed-gas-propelled agitator being connected to the aforesaid compressed-gas line, a paint-return port member carried by said cover adapted to have a paint-return line from the aforementioned circulating junction member connected thereto, an adjustable fiow-restrictor in said paint-return port member, said paint-return port member having a discharge for discharging the return-flow of paint into said container, said paint-return port member being in non-communicating relationship to said pump.

21. Liquid-supplying apparatus for delivering liquid from a container in which the liquid is at atmospheric pressure, to a remote air-operated spray gun, said apparatus including a base-portion adapted to support a liquid container open to the atmosphere, a generally upright housing-member demountably carried by said baseportion for enveloping such container supported on said base-portion, an air-motor carried by said housing-member at the top thereof, a liquid pump carried by and depending from the top of said housing-member beneath and in alignment with said air-motor and being spaced from the top of said housing member in a downward direction a distance such that it will be disposed near the bottom of the container on said base-portion when said housing-member is mounted on said base-portion in enveloping relation to such container, an operatingrod interconnecting said air-motor and said pump, a distributor-head carried by said housing-member at the top thereof, said distributor-head having a liquid chamber therein, an inlet thereto, a liquid-discharge passageway extending from said chamber and a liquid-return passageway extending from said chamber for permitting a re-circulating of the liquid from said container through said distributor-head and back to the container, a pressure-regulating flow-restrictor in said liquid-return passageway, a riser-tube extending from the discharge port of said pump to the inlet of said distributor-head, a hose connected to said discharge passageway for delivering liquid therefrom to a spray-gun, a compressed-air passageway carried by said housing-member at the top thereof for receiving compressed-air from a source thereof, said compressed-air passageway extending to said air-motor, an air-pressure regulator carried by said housing-member and having its inlet connected with said compressedair passageway, and a hose connected to the discharge outlet of said regulator for delivering compressed-air to the aforementioned spray-gun.

References Cited in the file of this patent UNITED STATES PATENTS 1,800,333 Wertz Apr. 14, 1931 1,834,321 Tervo Dec. 1, 1931 1,861,393 Henrietta May 31, 1932 1,879,221 Harrigan Sept. 27, 1932 1,960,389 McFerran May 29, 1934 1,962,623 Sweetland June 12, 1934 1,976,957 Morris Oct. 16, 1934 2,169,514 Buzzard et al Aug. 15, 1939 2,294,705 Wedeberg Sept. 1, 1942

Images