US2825349A

US2825349A - Parts cleansing machines

Info

Publication number: US2825349A
Application number: US249652A
Authority: US
Inventors: Lester J N Keliher; Jr Leonard L Northrup
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-10-04
Filing date: 1951-10-04
Publication date: 1958-03-04
Anticipated expiration: 1975-03-04

Description

March 4, 1958 L.. .1. N. KELIHER ETAL 2,825,349

PARTS cLEANsING MACHINES 5 Sheets-Sheet 1 Filed Oct. 4, 1951 fo/VAR@ L. /VoRrHm/P, JR

INVENToRs A TTU'RNEYY March 4,1958 L.. .1. N. Kr-:LlHl-:R ET Al. 2,825,349

PARTS CLEANSING MACHINES Filed oct. 4. 1951 s sheets-sheet 2 ,fo/VA RD L A/omHRuJR.

INVENToRs A TTORNE Y Y 7, 5g" o4 M March 4, 1958 L. J. N. KELIHER ETAL 2,825,349

PARTS CLEANSING MACHINES Y Filed OGL-4, 1951 s shee'ts-sheet 5 l l v I X 5575/? J N. Kn /HER LEONARD L. /VoRTHRz/R JR.

7 y INVENTORS ATTORNEY United States Patent O PARTS CLEANSING MACHLQES Lester J. N. Keliher and Leonard L. Northrup, Jr., Dallas, Tex.

Application ctober 4, 1951, Serial N 249,652

19 Claims. (Cl. 13e-itis) This invention relates to cleansing machines and more particuiarly to a cleansing machine having a rotatable impeller for circulating cleansing liquid in a tank.

It is desirable during repair or maintenance operation to leanse the parts of internal combustion motors, and the me. or oil impregnated dirt which adheres strongly to the parts, the cleansing machine employed to free the parts of this dirt, oil and grease must heat the -cleansing liquid in which the parts are immersed in order to expedite the action of such liquid and must circulate the cleansing liquid violently about the parts in order to mechanically remove the adhering dirt from the parts. The tank of the cleansing machine should preferably be provided with a settling basin to prevent recirculation of dirt which has been removed from the parts; and the rotatable impeller mounted in the tank for circulating the cleansing liquid should be so disposed relative to the settling basin that rotation of the impeller will not stir up the dirt settled in the settling basin. Moreover, the tank should be of such conformation that the tendency of the impeller to displace the body of cleansing `liquid from the center toward the circumference of the tank in a vortex and leave the central portion of the tank free of liquid is overcome, and the liquid is forced to circulate throughout all portions of the interior of the tank to bring the cleansing liquid into intimate violent contact with all surfaces of parts placed in the tank for cleansing. in addition, the shaft of the impeller, which usually extends downwardly through the bottom of the tank, should be provided with a seal which prevents leakage of cleansing liquid from the tank past the bearings of the shaft.

Accordingly, it'is an object of the invention to provide a new and improved cleansing machine.

It is another object of the invention to provide a new and improved cleansing machine having an improved rotatable impeller for circulating cleansing liquid in a tank.

Still another object of the invention is to provide a new and improved cleansing machine having means mounted in a tank for heating a cleansing liquid circulated through the tank by an impeller, and so disposed that the liquid is constantly directed into contact with the heating means.

A further object of the invention is to provide a new and improved cleansing machine having a tank provided with a settling basin and an impeller rotatably mounted in the tank to circulate cleansing liquid throughout the tank without materially reagitating or stirring up dirt settled in the basin.

It is still further object of the invention to provide a new and improved cleansing machine having a tank of such conformation as to overcome the tendency of an impeller mounted in the tank to displace the body of cleansing J'luid in a vortex from the center toward the circumference of the tank.

It is another object of the invention to provide a new Since these parts are usually covered with grease Patented Mar. 4, 1958 shaft is provided with a seal maintained in an air pocket while the impeller is rotated.

.Still another object of the invention is to provide a rotatable shaft with a seal and with means for forming and maintaining an air pocket about the seal.

Briefly stated, the new and improved cleansing machine includes a tank having a heater disposed adjacent but spaced from the bottom of the tank and supported on radially extending vanes. An impeller mounted in said tank for rotation about a vertical axis agitates and propels cleansing liquid upwardly past the heater. The tank is provided with an outwardly extending bay or interrupter chamber which, in conjunction With the supporting Vanes, overcomes the tendency of the impeller to displace the cleansing liquid in a vortex outwardly from the center toward the circumference of the tank. The impeller is provided with vertical fins extending upwardly from a substanttially horizontal circular base which overlies a settling basin and prevents undue disturbance of the dirt which may have settled in the base. The impeller is also provided with a dependent hood or skirt which telescopes over a vertical bearing sleeve. The bearing sleeve is provided with an air passage communicating with the vertical annular space between the skirt and bearing sleeve, and air may pass through this passage to displace liquid from between the upper portion of the skirt and sleeve and form and maintain an air pocket therebetween` A grease seal isV disposed in said bearing sleeve to seal between the bearing sleeve and the impeller shaft which extends therethrough. In another embodiment of the invention, the skirt may be provided with transverse apertures through which liquid is expelled from between the sleeve and the skirt as the skirt is rotated. A further embodiment employs a skirt provided with a helical screw which also expels liquid from between the sleeve and the skirt as the skirt is rotated.

Additional objects and advantages of the invention will readily be apparent from the reading of the following description of a device constructed in accordance with the invention, and reference to the accompanying drawings thereof, wherein:

Figure l is a perspective view of the cleansing machine, some portions being broken away to reveal the interior of the tank and the components disposed therein;

lFigure 2 is an enlarged fragmentary elevation, some parts being broken away to show certain details of construction, showing the heater controls;

Figure 3 is an enlarged vertical sectional view showing the impeller and bearing sleeve structure;

Figure 4 is a view similar to Figure 3 showing a modied form of the impeller skirt provided with apertures to pump liquid from between the impeller skirt and the bearing sleeve;

Figure 5 is a similar view of another modified form of the impeller skirt provided with a helical screw to expel liquid from between the impeller skirt and the bearing sleeve;

Figure 6 is a sectional view taken on the line 6 6 of Figure 5; and

Figure 7 is a side view of a modiiied rorm of the cleansing machine, some portions being broken away to reveal the interior of the tank and the components disposed therein.

in the drawings, the numeral itl designates a cleansing A shield 13 formed by a pair of rings i4 and 15 and a wire grill 16 extending therebetween is disposed beneath the tank and around the supporting legs. The tank has a bay or interrupter chamberV extending outwardly from one side thereof for a purposero be set forth below. The open upper end of the Y ftralcirculareaperture 3:70.LV AV settling basin-31"having-Y Y central; aperture 35 which is preferablyconcentric withY 1VYVK v*A bearing sleeve-36 extendsgupwardly'into theint'erior, 25

of-the spacebetweenthe bearingsleeveandth 'Y Ywelded to #the tankl while Ythe brackets -191and1 20 =may Y VrbenweldedV to reinforcing straps-'274 and 25, respectivelyif secured to the cover 18.by screws Y276.- lA handlev2'7 isv mountedonA the reinforcing straps andi'V the cover A.bythe l pair; ofscrews 28.5' While particularV rnethods of securing1V the:bracl ets,V the-reinforcing straps, andhandle toY their.Y associated elements f have been particularly? deseribediv'itH will be'tapparent that other conventional methods 'offse Y Y Y curingtheseeelenaentsto thevtank-and cover rnayabe;ern-ll l5 'ployedif Y Theftanlel 11f-ha s ac'onvex"bottom129provided VVWithceii-1 `verticalannularjvvall3:2 is'secured to the bottornfof# l tanlcf'byj-weldng or'inlany other; suitable vconventional20 nanner YThebottomSvfofthesettling*basinkinelinesiV l downward-lytoward{an-outlet-34, andis.provided-twitlial respect: tothe central aperture fofftlletank` brottorn--29l`VYV` Vof'thetankfl'l-through the central apertures ofthe bottrrn-l y of#thesettling'basin-and thertankrand is-rigidly secured;- to the settling `basin byra number of tl'ir'eaded-studs37;V etending through suitable apertures irnacir'cularVv inclined il flange 38 integral with thebearingfsleeveintofthreaded 30 ,Y b oresVin"the' bottomf33- of; theisettlingrbasin. Y A Washer'39'and a nutllythreaded onl'eachA studfhold-gthej;"iV

' inclined -ange andA bearing sleeve -in `pla'ceon VtheYV settling .Y 1 basin,` andfa I gasketY 42-A clamped Vbetween fthe ffia'nge' and-V v the bottomeofithe vsettling basin seals againstuid leakage therebetween;Y Since the flange VB18-isl inclined'complevv `frnentary to the bottom ofthe settlingrfbasin', andthe-,bean n Y ingf sleeve isgdisposed axiallytof thesettlingf'basim-i al t VVsenin-annular vertical wallr43 is'forrnedpartially Vsurround:dv

' ing thebearing sleeve but spaced therefrom, Thepurposef.; 40

ersemi-VV annularwall-will-befhereinafterexplained. Y- Y The shaft'44of the impeller45 extends axiallyfthrough the bearingsleevefandeis rotatably supported thereirrby: Y a pnair'of spaced ballrbearing assemblies :L46 and-457;: and .45V Y apair offretaining-ringsf48 and-49; Thelupper bearing 'Y assembly includesjan -outerrace tl-resting-onan annulari ledge 51; provided-by'an enlargemntofthec'entrallb"o`r`e,,

'1 of@ the; bearing-fs1eeve3 faV plnralityroflballs'l; and; an

i vupper retainer ring .'48 isV disposed{inanlannularreeesseVV i injthefrinjipeller: shaftandextends4A outwardly overl-Land j about the inner racef53to lir'nitrthe downward movement it ofthe impell'er shaft'pelative-to the bearing sleeve; V The Y lower retaining-ring-49/isjdisposed inan annularfr'ecessev Y VYin the'impellershaftsspaced below Ythe shearing-aridserves:V

` to limit the upward movement ofthe impeller, shaftby.

abutting the inner Yraceof thefupper bearing, Vandto perrnit removal of"V said npperbearingin` disassemb1y.:j Y The lowerV ball bearing assembly V47-{sinriilar1y includes f anni 60 opter race 56 disposed inar enlargement 57 of the lower:A Y end of the'centralbore'ot'lthebearing sleeve,"a-'pluralityV 'l of balls 58V,` and an inner race 579 disposed aboutgthe ini#l `ledge 67V` fornied by thev re f theimpellerfshaftl` f YA seal assembly ,705 is proifidedlbetween tween; theg'npper; anfdflowerv seal lasseinblils; fand-'bet the impeller. Trh'ergasket 66and the -seal ring @prevent leakage of air or liquid between the' upper re duced por- Y tion of the impeller shaftrandtlie inpellel;

y meimpener shaftand the bearingrsleeve 3,6andincludesngppper v seal assembly 71 anda lower@ sealjasse'mbly'72; 'Y The upper Y :seal assembly comprises a resilientfannular -sealingmem-fV Q ber 'YISJheld-inran annular-1,metalliclretainer.'member 74 j (see Figi 5). Y The resilientannular sealing :member 721';

has a ilexible liporange `75 formed'in it'sjinnerfportionYV i Y turned'upwardly and inwardly toward ase'ratingfsleeveY K Y76 whichtis rigidly secured on'theimpeller shaftt`44ibe1ow thelgltlbV 6.0 thereroflgflhe angegl. of'. thev resilient n--f nulr i eating nreibermay b1e"forced on twardly i ing'enggementfwithftheseatingQsleevegofgthesha Y Y Y Y Thl `exiseal assembl'yj'Y/Z; restsonianlannular ledge. j Y Y sleev'e'jaiul,tthegimpellerQshgift.V The annular spacegfb' fairen 'of rhimpeuerfwil I betweenjtheT settling i basin and lthe Y interiorV .o which ,'willte'd 'to' draWfthe `,liquidifijorrijthecy ridrical l spaceV 79.5YAir'will/ ther'rr b`e=drfaWn ughfthe ond y Y SSVintomthe'cylindrialsp; e agliti-tof'fo'rm ank y fck" at the upper end"'thereof."1tfis lpreferablethat4 th co 'cylindrical jspqe, Ytimeinsuringthat me pdreeyiin. Y* i always be present;

is rotated, the screw 87 will force liquid out of the cylindrical space in the conventional manner.

It will be apparent that compressed air may be supplied to the cylindrical space through the passage 81 in a machine having either of the two modified forms of the skirt, if so desired.

The impeller is rotated by a motor 88 mounted in a motor housing 89 secured to the tank 11 in any suitable conventional manner. A substantially U-shaped grill shield 9i) may be mounted below the motor housing. The motor shaft 91 is provided with a drive pulley 92 which 4is connected to a pulley 93 on the lower end of the impeller shaft 44 by a pair of belts 94.

The tank is provided with a plurality of spaced substantially radially extending supporting vanes 95 which are welded or otherwise suitably secured to the concave bottom 29 of said ltank. A substantially U-shaped tubular heater tube 96 is supported on the vanes 95 and has its ends extending outwardly through the wall of the tank. One end 97 of the heater tube may be connected to an exhaust stack, not shown, while ythe other end 98 of the heater has disposed therein a main burner 99 and a pilot burner 106 which are supplied with fuel from a conduit 101 through a conventional pi'lotstat 102, a magnetic valve 103 and a shut off valve 164. The pilot burner is provided with fuel by a conduit 105 connected to the pilotstat and is controlled by a thermocouple 106 energized electrically through a conductor or lead 107. The magnetic valve 103 is controlled by a thermostat 10S communicating with the interior of the tank 11 and which electrically actuates the magnetic valve to control the temperature of the liquid Within the tank.

The outlet 34 of the setting basin 31 is connected in any suitable conventional manner to a T-shaped two-way valve 109 whose handle may be turned to allow liquid to enter from conduit 111 -connected to a source of water, through a shut-off valve 112 and the valve 109 tothe settling basin 31 and thence into the t-ank 11. The settling basin and the tank may be drained into a conduit 113 connected to a sewer line by turning the handle of the valve 109 to another position, thereby allowing the liquid to drain from the settling basin through a shut-off valve 114 into the conduit 113 and thence to the sewer line.

ln use, the tank 11 is rst lled with water and a detergent, and -the burners are lighted to cause the heater tube 96 to heat the water in the tank. The parts Ito be cleaned are then placed in the tank on a grill 115 supported on the heater. If the parts are long yor have projections extending therefrom, end portions of the par-ts i of the projections may be disposed in the bay 17. The cover 13 is then closed and the motor 83 connected across a source of electricity to drive the impeller 45. The liquid in the tank will be drivenor swirled upwardly by the impeller vanes 116 about and into intimate con- 1,. tact with all surfaces of the parts, the hot water, aided by the chemical action of the detergent and by the mechanical forces caused byits agitation or swirling, dissolving and removing dirt, grease and oil from the parts. The supporting vanes 95 and the bay 17 prevent the impeller from displacing the water in avortex from the center toward the circumference of the tank, so that parts placed in the middle of the tank will be fully subjected Ito the action of the Water. Y Y

The vanes 116 of the impellery project upwardly from a circular plate 117 which curves upwardly to the central boss 62 of the impeller. The circular plate 117 is of larger diameter than the aperture 30 in the bottom of the tank, and extends toward the concave bottom so that its outer lower peripheral edge lies closely adjacent the bottom. The circular plate ofthe impeller obviously acts as a bafe and isolates to a considerable degree the liquid in the settling basin from turbulent tow of liquid in the tank, so thatdirt and sludge `once settled in the basin will not be stirred up and Aagain moved .to the tank.

If desired, the conduit E55 may be connected to a l in the modied forms of the impeller assembly shown Figures 4 and 5, the liquid in the cylindrical space is expelled either by the pumping action of the apertures 36 in the skirt Stia of Figure 4, or by the pumping ac' tion of the helical screw 87 of Figure 5.

In any form, however, an air pocket will be created in the upper portion of the cylindrical space 79 which wiii prevent the passage of liquid between the impeller shaft 44, the sleeve bearing 36 and the seal assembly 70.

lt will be seen that a cleansing machine has been disclosed which includes a tank 11 of irregular conformation which prevents displacement of liquid in the tank from the center to the circumference of the tank in a vortex when the liquid is circulated by a rot-ary impeller in the tank. Moreover, it will be seen that the tank is provided with a settling basin 31 in which liquid and sludge is isolated from the turbulence of the liquid in the tank by the circular plate 117 `of the impeller which extends beyond the sides of the settling basin. Finally, it will be seen that uid leakage between the impeller shaft 44 and the bearing sleeve 36 in which it is mounted is prevented by a seal assembly 7i? and the formation of an air pocket within the bore of the impeller skirt about lthe upper end of the bearing sleeve and the seal assembly.

In Figure 7 is illustrated a still further modified form of the cleansing machine, in which an elongate tank 113 is provided with two

impellers

119 and 120, similar to the impeller 45 of the machine illustrated iu Figure l. The bottom 121 of the tank slopes downwardly from the vertical walls 122 of the tank and from a central raised portion 123 toward two

apertures

124 and 125 so that dirt and sludge may settle into the two settling

basins

126 and 127, respectively. The outlets 12S and 129 of the two settling basins are connected by conduits 130 and 131, respectively, to a valve 132. The valve 132 controls the passage of fluid into or out of the settling basins, and is connected with a conductor 132x: which communicates with supply and exhaust lines in the same manner as the form lrst described.

The

impellers

119 and 12@ are mounted for rotary movement in the same manner as the impeller 45 of Figures l, 3, 4 and 5 and have impeller shafts 133 and 134, respectively, which are driven by a motor (not shown). Conventional pulleys 135 and 136 are rigidly secured to the impeller shaft whereby a belt (not shown) connected to the drive shaft of the motor may simultaneouslyY drive both impellers.

power required to drive them. If both were rotated in the same direction, an undue turbulence or swirling of the liquid would result and a greater force would have to be applied to the impeller shafts to rotate the impeller shafts.

The bottom 121 of the tank is provided with a plurality of vanes 137 disposed substantially radially about each of the impellers and which extend inwardly from the wall 122 of the tank. A heater tube 139, similar to heater tube 96, is supported on the vanes. ported on the heater tube for supporting parts to be cleansed in the tank.

A bay or interrupter chamber, such as bay 17, is not necessary since the liquid driven by each impeller will be thrown into the path of travel of the liquiddriven by the t other impeller thereby preventing the displacementof The two impellers are preferably driven in opposite directions to decrease the i A grill 140 is supv s aspirato i space therebetween; a shaft depending from said impeller and extending downwardly through said bearing sleeve; sealing means between said shaft and said bearing sleeve to prevent leakage of uid therebetween; and means for expelling liquid from said space.

7. The device of claim l characterized in that said tank has a main substantially cylindrical wall extending upwardly from said bottom and a bay extending outwardly from the wall for preventing displacement of liquid in the tank in a vortex from the center to the circumference of the tank.

8. The device of claim 1 characterized in that said tank bottom is provided with a plurality of radially spaced supporting vanes; and a heater disposed on said vanes, said vanes and said heater being disposed in the path of flow of liquid contained in the tank to be engaged by said liquid for preventing displacement of liquid contained in the Y tank in a vortex from the center to the circumference of the tank.

9. A cleansing machine including, a tank having an inwardly sloping bottom; a settling basin secured to said tank bottom having an outlet and an inclined bottom sloping toward said outlet, said bottoms having aligned apertures; a bearing sleeve extending upwardly through said apertures; means on said bearing sleeve closing the aperture in the basin bottom; an impeller disposed in said tank above said apertures and having a depending tubular skirt disposed about said bearing sleeve over substantially the whole length of said bearing sleeve, said skirt being spaced from said bearing sleeve to form a cylindrical space therebetween; a shaft secured to said impeller and extending downwardly through said bearing sleeve; sealing means between said shaft and said bearing sleeve to prevent leakage of iiuid therebetween; and uid pressure means for expelling liquid from said cylindrical space.

10. A cleansing machine including, a tank having a downwardly and inwardly inclined bottom; a settling basin secured to said tank and having an outlet and an inclined bottom sloping toward said outlet, said bottoms having aligned apertures; a bearing sleeve extending upwardly through said apertures; means on said bearing sleeve closing the aperture in the basin bottom; an impeller disposed in said tank above said apertures and having a dependent tubular skirt disposed about said bearing sleeve over substantially the whole length of said bearing sleeve, said skirt being spaced from said bearing sleeve to provi-de an annular space therebetween; a shaft secured to said impeller and extending downwardly through said bearing sleeve; sealing means between said shaft and said bearing V sleeve to prevent leakage of uid therebetween; and means for admitting gas into said annular space to form a gas pocket therein.

11. A cleansing machine including, a tank having a downwardly and inwardly sloping bottom; a settling basin secured to said tank and having an outlet and an inclined bottom sloping toward said outlet, said bottoms having aligned apertures; a bearing sleeve extending upwardly through said apertures; means on said bearing sleeve closing the aperture in the basin bottom; an impeller disposed in said tank above said apertures and having a dependent tubular skirt disposed about said bearing sleeve over substantially the whole length of said bearing sleeve, said skirt being spaced from said bearing sleeve to form a cylindrical space therebetween; a shaft secured to said impeller and extending downwardly through said bearing sleeve; sealing means between said shaft an-d said bearing sleeve to prevent leakage of fluid therebetween, said bearing sleeve being provided with a passage for admitting a gas into said cylindrical space above the lower ends of said skirt and sleeve to form a gas pocket therein whereby the liquid in the tank is prevented from passing upwardly in said cylindrical space. f

12. A cleansing machine including, a tank having a downwardly and inwardly sloping bottom; a settling basin having an outlet and an inclined bottom sloping toward said outlet, said bottoms having aligned apertures; a bearing sleeve extending upwardly through said apertures; means on said bearing sleeve closing the aperture in the basin bottom; an impeller disposed in said tank above said apertures and having a dependent tubular skirt disposed about said bearing sleeve over substantially they whole length of said bearing sleeve, said skirt being spaced from said bearing sleeve to form a cylindrical space therebetween; a shaft secured to said impeller and extending downwardly through said bearing sleeve; sealing means between said shaft and said bearing sleeve to prevent leakage of uid therebetween, said bearing sleeve being provided with a passage for admitting a gas into said cylindrical space above the lower ends of said skirt and sleeve to form a gas pocket therein whereby the liquid in the tank is prevented from passing upwardly in said cylindrical space, said skirt being provided with means for expelling liquid from said cylindrical space when said impeller is rotated.

13. A cleansing machine including, a tank having a downwardly and inwardly sloping bottom; a settling basin having an outlet and an inclined bottom sloping toward said outlet, said bottoms having aligned apertures; a bearing sleeve extending upwardly through said apertures; means on said bearing sleeve closing the aperture in the basin bottom; an impeller disposed in said tank above said apertures and having a dependent tubular skirt disposed about said bearing sleeve over substantially the whole length of said bearing sleeve, said skirt being spaced from said bearing sleeve to form a cylindrical space therebetween; a shaft secured to said impeller and extending downwardly through said bearing sleeve; sealing means between said shaft and said bearing sleeve to prevent leakage of uid therebetween, said bearing sleeve being provided with a passage for admitting a gas into said cylindrical space above the lower ends of said skirt and sleeve to form a gas pocket therein whereby the liquid in the tank is prevented from passing upwardly in said cylindrical space, said skirt being provided with a plurality of circumferentially spaced apertures adjacent its lower end whereby liquid is expelled from said cylindrical space when said impeller is rotated.

14. A cleansing machine including, a tank having a downwardly and inwardly sloping bottom; a settling basin having an outlet and an inclined bottom sloping toward said outlet, said bottoms having aligned apertures; a bearing sleeve extending upwardly through said apertures; means on said bearing sleeve closing the aperture in the basin bottom; an impeller disposed in said tank above said apertures and having a dependent tubular skirt disposed about said bearing sleeve over substantially the whole length of said bearing sleeve, said skirt being spaced from said bearing sleeve to form a cylindrical space therebetween; a shaft secured to said impeller and extending downwardly through said bearing sleeve; sealing means between said shaft and said bearing sleeve to prevent leakage of fluid therebetween, said bearing sleeve being provided with a passage for admitting a gas into said cylindrical space above the lower ends of said skirt and sleeve to form a gas pocket therein whereby the liquid in the tank is prevented from passing upwardly in said cylindrical space, said skirt being provided with a helical screw disposed in said cylindrical space for expelling liquid therefrom when said impeller is rotated.

15. A cleansing machine including: a tank having a bottom; a settling basin open at its upper end and connected at said upper end with the bottom of said tank; a bearing sleeve disposed in said basin and extending upwardly through said open upper end into sai-d tank; a shaft rotatably mounted in said bearing sleeve and projecting above the upper end of said sleeve; an impeller mounted on said shaft and having an integral imperforate circular plate disposed adjacent the bottom of said tank and completely overlying the open end of said basin and i p1ate, Ysaid nnpeueralsshayinlgatu ,from the undersidelofsaid lcirculrlll Y tending downwardly intosaidib'asin' aln Y I y I ciV the-bearingsleev'e length; and,means,rconxiectedwitli,v Y,said bearingsle'eveforcondcting air Yunder pressre from t exteriorly of s'aid tankandbasin Viiitf'tlieQs'pace!between,

t said bearing slee'yegrse'aliiig'ineans'between said shaft and directionV oflrotation of the,skiIt-Wherebyfliquidg'is ex-v peiled from Vsaid f cylindrical? 1spaeY Wiien'f said impeller isrotated; and' means connectedwithlsaid Ybearing,,sleeve and communicating iwith'ls'aid`v cylindricalj'space Ybetvrleensaid slir't'and sleeve above thelowerendof'saidfskirtr con- 25 ducting gas from aV remote pointintoVsaidylindricai'space i as Vliquid is ejectedlier'efrin. s t l 17-. `Inl amachine `having-a` rotatable I`in ipeller for'cirl curilatingv liquid; kaV tubular t' skirt depending front the f irn- WardlyV in. the direction [ofA rotation Loft' said tvsrkiit whereby t liquid in said cylindricalvspacc 'ispropelleddownwardly YYOf said space toward Vthe, lowricndbff said.skir'tfasf'saidY @skirt'is rotated.' Q I Y. Y A

18. A cleansing x'nachineY irlcliidingif,a.tnl{fhavingV av Y, downwardly and inwardly slopingbottom; a se'ttlingvbasin having an outlet and an inclined bottomtrsloping'rtoward said, outlet, said bottoms havingfaligned Vapertures;a

bearringnslere, extending uinvlrdlyillrffolh@idf-@mm3 depending from Vsaidrirnp-e1ler 'andlexteri afmnlarA space aboverthef lower1 ends; Vo l' KV.' i 19; A cleansingmlliinff i claim 1 wherein the, tubular skirtA 1s impA out` itt s1e`1.1gth.YV

y V 1,678,018 ao;

Y Y2,595,660 t means-1011 saliti., bearing;sleeve.V closmgth hasni bottom; Van limpllrrhavingg rlitypffnsestending upwardly? 'omtsaldtplat skirt depending from said platteland fdispose Y bearingvsvleeve over substantiallylthe/wljlel' isaid 5 i' Y bearing sleeve, said 'fsrkirtj being space df sleyelto provideY anrannularjspacetlie b Y throngh'said bearing sleeve;and;sealingjY Y said 'shaiftrandsaid bearing Vsleeve topfveii ,y Y uid'therebetween, saidbearingleeyebei with a passage for VadrnitiiigrfgV undef Cited in the me ofl this patent;u

` References i UNrTEDf-SVTATESBATNTS V2,374,500 e 2,432,291V 2508348.' 2,595,659