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Aug. 27, 1946. H. A. ARNOLD 2,406,485 ‘ HOSE PUMP Filed May 5, 1944 ' z Sheets-Sheet 1 I Patented Aug. 27,1946 » 72,406,485 ~ . UNITED STATES PATENT OFFICE 2,406,485 Hose PUMP Harold A. Arnold, Knoxville, Tenn., assignor to The University of Tennessee Research Corpo ration, Knoxville, Tenn., a corporation of Ten nessee Application May 5, 1944, Serial No. 534,274 7 Claims. ' (Cl. 103-149) 1 The present invention relates to pumps com prising a ?exible hose and rotating members or Fig. 7 is a sectional view on the line 1-1 of Fig. 1 looking in the direction of the arrows; rollers engaging and compressing the hose to Fig. 8 is a, sectional view on the line 8-8 of Fig. ' exhaust successive charges of liquid or gases 1 looking in the direction of the arrows; therefrom. ~Such pumps are highly desirable in Fig. 9 is a detail similar to Fig. 1, with a band their simplicity and cheapness but in the past interposed between the rotating members or roll have been objectionable, among other things, be ers and the hose; ‘ cause of lack of ef?ciency and durability and Fig. 10 is an end elevation corresponding to because of creepage and. wear of the hose. Fig. 9; The objects of the present invention, among 10 Fig. 11 is a cross sectional view on the line others, are to provide a hose pump that avoids ll—ll of Fig. 5 looking in the direction of the all of these objections and has maximum ei? arrows; ciency and durability for pumping both viscous materials and gases. These desired results are Fig. 12 is a cross sectionaI view on the line I2—I2 of Fig. Slooking in the direction of the secured by a preliminary stretching or tension 15' arrows; ing of the hose over the rotating members or Fig. 13 is a cross sectional view on the'line rollers, and this preliminary stretching or ten I 3—l3 of Fig. 5 looking in the direction of the sioning of the hose insures a complete but suc cessive closing or sealing of the opening therein Fig. 14 is a. crosssectional view through the when the rotating members or rollers progres 20 hose on the line “1-44 of Fig. 5 looking in the sively compress the hose. This effective closing direction of the arrows; and or sealing enables the desired suction or pres Fig. 15 is a detail. sure within reasonable limits to be obtained. Referring to the drawings, wherein like refer Other objects are to provide a pump of simple en'ct numerals indicate like parts, 20 indicates construction that may be economically manu 25 a conventional base supported by legs 2| for a factured and readily assembled, one which re motor 22 which drives a rotor or carrier, here quires no by-pass valve to relieve against excess shown as a pulley 23, through a belt 24. pressure, one whose operation is not adversely The‘pulley 23 is mounted on a shaft 25 that arrows; ' I aifected by the drying or caking of small amounts is carried by an upright 26 suitably ?xed to‘ the of viscous ?uids such as molasses,v one which is 30 base 20 as by brackets 21. As here shown (Fig. 7) not adversely affected by corrosive materials such the shaft ‘25 is secured to the upright 26 by means as phosphoric acid, one which does not expose of nuts 28 and washers 29. The shaft 25 carries wearing or mechanical moving parts such as a'sleeve 30‘ which rotates thereon and is posi pistons, valves, and impellers to sticky viscous tioned on ‘said shaft by a nut 3| and washers 32. or corrosive ?uids, one that is as readily cleaned - The sleeve 30 carries the rotor or pulley 23 which as a piece of hose, tubing or pipe, one that has is held in position by a nut 33 engaging a screw practically a 100 per cent volumetric displace threaded portion 30' of said sleeve 30. ment e?iciency for pumping gases or producing The pulley 23 carries a- plurality of pintles} a high vacuum, and one that is adapted for 34, '35 and 36. Each of these pintles is secured pumping liquids with high vapor pressures or for to the sprocket by nuts 31 and 38 (Fig. 8) engag pumping vaporous chemical compounds such as ing a screw threaded portion 39 of the pintle. ammonia hydroxide. The other ends of each of these pintles project - The invention will be better understood by ref through and are carried by a plate ‘40 mounted erence to the accompanying drawings wherein on the sleeve 30. The ends of the pintles project— 45 ing through the plate 40 are preferably screw Fig. 1 is an elevation of the novel pump; threaded at 4| and carry nuts 42 that engage Fig. ,2 is a, corresponding plan view; with plate 40 to hold the pintles 34, 35 and 36 Fig. 3 is an end elevation view partly in sec tion on the line 3—-3 of Fig. 1; ’ Fig. 4 is a detail of the rotating members or rollers and a band for insuring the same speed of'rotation thereof; ' V - Fig. 5 is a detail corresponding to Fig. 1; Fig. 6 is a cross sectional view of a modi?ed -form of hose; ' . in ?xed position. Thepintles 34, 35 and 36 carry the sleeves 34', 35' and 36'. ' - l The hose 43 is looped over the rotating mem bers or sleeves 34’, 35’ and 36' and stretched'or’ tensloned to the extent desired for a particular pumping pressure. As herein shown, the end 43' of the hose‘ is adjustably connected to a pipe ?t 567. ting 44 on the suction side 01' the pumpand the 2,406,485 point about 30° from line l4—|4, Fig. 5. In Fig. end 43" of the hose is connected to a pipe ?t ting 45 on the discharge side of the hose. The extremities of the hose are secured to the pipe ?ttings 44 and 45 by suitable screw threaded couplings 46 and 41 so that the desired stretch ing or tensio-ning of the hose can be secured by, 13 the walls of the hose have contacted at 430 while at the marginal extremities 43d there is no contact, this cross section being at a point‘ about 13° from the line l4—|4, Fig. 5. In Fig. 14 is shown the point of maximum compression and in this ?gure there‘ is ,shown' at" 43c a com plete closing or sealing of the opening of the hose. This condition of complete seahng is manipulation of these couplings.‘ The pipe ?t-‘ tings 44 and 45 are clamped in position between base 20 and base member 20' by means of bolts 48 ‘and nuts 49. ' facilitated and insured by the preliminary‘ 10 Instead of providing couplings 46 and “for the stretching and extension of the hose 43;,it'v .. stretching or tensioning of the hose over the rotating members. The completeness of the sealing has a‘ direct, in?uence on the ‘efficiency of the suction lift and pressure. As shown a willrbe understood that the‘ extremities of the‘ hose may be ?xedly secured we suction source‘ " hose 6f the proper wall thickness, elasticity and and discharge means and the‘ pintle's '34-,v 35 and flexibility is fully rounded in all parts except 36 adjusted radially along slots 34a, 35a and 36a at or adjacent the position 'of the rollers as (Fig. 15) in the plate 40 andnsim-ilar slots (not shown in Fig". 5; Thus each roller imparts a shown) in the pulley 23, the pintles being stripping action on the hose, forcing the liquid clamped in the desired position of adjustment or gas in the hose to move ahead of the pro by any suitable'or conventional means. Further 20 gressive but continuous closing action of the this stretching or extension can be effected by roller‘ on the hose. The ability of the hose to moving the pipe ?ttings 44 and 45- downwardly, round‘ itself after the passing of thetroller creates or by an adjustment of the support 26 which is a partial vacuum in back of the roller or allows permitted by slot 48' therein (Fig. 3) or an ad justment of shaft 2'5 in slot 25'. 25 additional ?uidwor gas to fill up the hose by displacement. Thus the movement of the liquid - For purposes of illustration the rotation of through the hose is continuous at a velocity equal to the peripheral speed of the rollers. I have found that the opening in the hose can the pulley 23 carrying the pintles and sleeves over whichv the hose 43 is looped and stretched is counterclockwise. Unless some provision were made to insure that the several sleeves carried 30 be more readily closed or sealed if it is provided with longitudinal notches or _’channels 54 as by' the pintles rotated in unison and at the same shown in Fig. ‘6 in which event, however, the hose speed each sleeve leaving the position 36 would should be reihfor'cedhat ‘54' opposite the notched stop rotating due to_fri'ction in the bearing.- As interior wall so that the hose will round out again they sleeve reached the position of sleeve 35 and afterth'é passage of) the compressing roller and contacted the hose it would suddenly be forced 35 thereby counteract the collapsing effects of high to rotate, and the friction between the sleeve outside or low inside atmospheric pressure. _ and the hose would wear a notch and ?nally a I have as; found’ that this provision of a hole at that point although the remainder [of ' preliminary stretching or tensioningof the hose the hosewould be practially free of wear. ' To ' avoid this contingencylmeans; are provided in 40 looping the same over the rotating members met "sfe's the by-pass eifects of the hoserby faci-lie the form of an elasticband 50 (Figs. 4 and‘ 8),' which is carried in a groove 58’ ingthe outer end ta' of eachof the sleeves 34’, 35' and 36'». This band provides "a driveibet'ween the sleeves and‘keeps all of them turning at the same speed although one may‘ not be in contact with the hose. This provision eliminates localized wear on the hose. isa manifest advantage that the present hose ' transverse expansion outwardly in alldi rections 'in'the presence of excess pressure, and it eliminates the usvIalby-pass valves- and " condiiits. b‘pu‘mp embodying the present invention is not only siinple in construction, easy to assem'e A'further expedient for preventing localized bre'aea disassemble,‘ but cheap to manufacture. ' wear on the vhose is to interposebetween- the be‘ adjusted by a preliminary stretching rotating rnemberswor sleeves and the hose a band 50 0r tens-ioning of the hose over the rotating meme 5| ‘(Figs. 9 and 710.) which prevents any contact users to pump any pressure within limits without between the rotating members “and. the hose. This band could‘be continuous like band 50_or| one end 9f the band could be fastened to the adversely aifecting the'suction lift or the “closing other end '53 of the band free. vacuumtpum‘p and therefore is “self-priming.” Milk _atl93° F. was boiled, under vacuum created by this hose pump and wild onion flavors, unless exceptionally strong, were removed from the milk. f or sealing of the opening in the hose. It can be support 25 by a nail or, fixture 52 leaving the 55 used'to pump heavy viscous materials, such as molasses; or to pump gases. v_ The operation _of the device will be_ readily understood by reference to Fig. 5 andFigs. .1-1, 12, 13 and 14,.‘ The stretched hose 43 which maybe the standard milking machine hose, such as De Lavalhhaving a 1A; inch wall “thickness w a 1”—6 inch inside diameter or De Laval 'No. .0166and vI. H'.-_C. 12274CA 11;? inch inside diam 60 It is an effective It is not affected adversely ‘by corrosive acids, such as phosphoric acid, nor is it affected by the drying and caking of small amounts of molasses; and it does not clog with dirt or sludge. The stretched over the rotating members or sleeves 65 pumps with more than bile nose of varying sizes eterand "V8 inch outside diameter is looped and to theextent desired for a particular suction lift andv pressure.__ When ‘so stretched and posi tioned the hose will have the cross sectional con ?guration shown in Fig. 11 at all points except at and adjacent the position of the roller 34' in Fig. 5 where it will have cross sections ‘shown in Figs. 12, 13 and 14., In Fig. 11 the opening ‘43a of the hose is round and undistorted, In Figs 12 the opening 48b has been vvelongated and hat‘ depending ‘Oh the relative capacities desired, have been used as metering, 'prpportiomn-g and mixing devices for substances such as molasses and ‘acids for legume silage and as-meterin'g and proportion ing devices on liquid fertilizer distributors. While I have disclosed ‘herein ‘the best embodi; ment of the inventive idea to me, iti's to be understood that the ‘invention is susceptible of ‘other mechanical embodimentswitnm? the inn terfed by the rol'le'r;, ‘this cro‘ss'se'ction.beingfat ‘a1 75 / its of the appended claims, and it is Ttb‘bé serum 2,406,485 6 ularly noted that while I have herein shown three the hose stretched and tensioned at said desired rotating members that act to support and succes degree and to compress said hose for perform sively compress the hose, additional rotating ance of the pumping operation. members may be employed depending on the 5. A pump c0mpriSing a hose adjustably con" length and number of the suction strokes de nected to a source of ?uid and a discharge ele sired. ment, and a movable element provided with a plu What is claimed is: rality of rollers over one of which the hose is 1. A pump comprising a hose stretched beyond stretched and tensioned to the desired degree to its normal length, and a plurality of. members produce the desired pump pressure, said rollers operable one after another to keep the hose 10 being operable by said member one after another stretched and compress it for performance of the to keep the hose stretched and tensioned and to pumping operation. compress it for performance of the pumping op 2. A pump comprising a hose stretched beyond eration, said hose being expanded outwardly in its normal length and connected to a source of all directions upon production of excess ?uid ?uid and a discharge element, a rotating support, and a plurality of members‘ carried therebynsaid members being rotated into. and out of engage pressure therein to thereby afford a by-pass ef fect and eliminate the necessity for by-pass valves and conduits. ment with the hose and" operable one after an 6. In a pump of the type comprising a rotor other to keep it stretched and effect the pumping provided radially of its axis of rotation with operation, said hose being transversely expansible 20 spaced .hose compressing elements, a hose ar outwardly in all directions to relieve any excess ranged to be compressed by said elements and pressure produced therein. provided interiorly thereof along its length with 3. A pump comprising a'tensioned hose, a mov a notch or channel enabling the opening in the able support, a plurality of rollers rotatably hose to be completely closed when said hose is mounted on said supportfand movable thereby 25 compressed by said elements. into and out of engagement with the hose to ef '7. A pump element comprising a hose provided fect the pumping operation, and a connection interiorly thereof along its length with oppositely between‘ said rollers to cause all of them to ro disposed notches or channels enabling the open tate on their own axes at the same speed. ing in the hose to be completely closed by com 4. A pump comprising a hose adjustably con 30 pression and resilient reinforcements on the out nected to a source of fluid and a discharge ele side of the hose opposite the notched interior wall ment, and a rotating member provided with a plurality of rollers over one of which the hose is initially stretched and tensioned to the desired degree to produce the desired pump pressure, said 35 rollers being operable one after another to keep insuring a more uniform wall resiliency and strength for normal opening or expansion of the hose to its initial shape and producing an ellip tically shaped hose. ' HAROLD A. ARNOLD.