US1851338A - Volatile liquid transfer pump - Google Patents

Description

'Pat e'ned Manizeqlesz' T1021, ,QRnqexsolm mmnors; A QQRPQBAHONQDF ILLINOIS- "'VQLATBILEYLIQUID 'iZEAiISFEB rum? 5 A151 invention relates to dispensers .Ifqr

volatile: and inflammable{liquids and; centena- "plates the prevfision 50f, an improvedftmnsfer pump for thehandlingefithese.liquids; .Be-

vcause-"051' their; volatility and iinfiammebilipy j these. materials present:eidiflieultpneblem 1,7 transportation endj handling. Mosh-com? Lmunities, :llavezlews' regulating theiluuse, stere age an' l ngg andsome r-equire themme beshi-ppecl endistpredin steel. barrels :teg re- ,duee the hazard Qf'afi-neend. jegplpsl' n many instances-es, ,fela example; 3111 the use ofqlaequerthinners-such assamyl-acetakte thyl e eeetene, xylol and =the like, it 121s enecess zryio v dispense itheqliqui dseinsmalliquantities, 1n somegcases it is clesizedi to dispense.;-it,as used-While in others .i t*'m1y-, :be dispensed intb' small {containers afor subsequent 1156 01? sale; .In-plants where considmblfl-quaptipies are usecl'theyl are zusuallyiztmnsferred" from ,the drums -t o;sma1l-:c0ntainers\Qnsafety eans ,for "-188 by individual workmen; fllhese. dispense .ing operations:musthecemsiedgut with great caneto prevent spilliilgqtheliguiclen encouragingexcessiveeya ppration frQm whlchadanger;

011s andccostlyffil tes-or egplosions :Ineyresult. In; spite of all gpneeautigns, vf1,1pmsceyer,. smell fires 'will occVasio nelly 302C111- abeut the eenfainer. tis therefore a lseiim oritantfto 7 P prevent suchsuperficial fires zfiidml g backintolthecpntainer-andeausiilgnnere $2110- Withzthese eenditions;ingnindilhajefaiiriecl v lent firesgorrexplqsionsh teprevide an imProvedLdispehsipgassembly 1 adepteclto engege'thelepen'ingi ofibung bfzthe Container from v wllieh' ilhe liquidlis to be removecl. Thisassemblyineludes asuctiondrop pipe extending-t0 the lbetfcom of the icons;

Vtai nep, aapump a idispensingvnoz'zlei and a l catch; basin and support provided with a,

drain passage beek toztheu centaili I have also..- aimedirto pre ideeldispensing eqliipment. for the sdispensinglof.vdlitile liquidsrhzixiinga. collapsilele suction 'clrep pipe whereby like-equipment lmay ibe used with containers 10f ariable denfil ls great; different bungs of the same e ':Q11;te 111e1':es;.naey*ibe.dei sire-:1 W1th :lr;ums-er'barnels. 7 I

FATENT" MERRITIE .0. WEMMPJLE, p1 C F RDQ LLI I ssxewoliiwoteno; D; iRO'PER 0633mm tile liquids hevingzmeans:pjzevidedjfdr,repid- 1y interruptingrthe (flow offlliquicl 'Whefmthe ap-mp1s sigep ped. l-have also :aimed to 11 110: m le a dlspensing (equipment fer; Ql'atiIe ligui c'ls th eving alflexiblelhose @lisclmrge prbvldegl with "means for: automatically inter,- mptmgrthe flew of liquid from thelhose'when thepump vlsiscqpped.

.the p rovisienof (a disp 'ensiiig equipment. hat

Still furthen gobjeets of the il w entioilwal e ingk a-ecatchqbasin, a drain passage leading heel; to' the :i liigeri qr Of {the eentainel" and sermng as :a rs uppe ztmg member forsthe re:

mainclereithemquipment a ncl a .pump to drawuthe ,meteizial fpb1n43he;container.. -Qther I obgect sn and associated advantages c nnect-ecl with my gconstruetien; willlbeceme eyident ton-those skilled inutheert. frqm the e .1? igum; shows theuequipmentiin .use 011 ,73

metal -dI'111i1 (or, banrel; Thejjbannel shown in section; .anclflppertioneof the slictien 'Clrqp pip'evis brekengawayvto. shew theeQnstnuetiQn V 11101; of my: invention. to containers having small oper ings 1 0.1.- bungs, showing the I sup; pertmg splcler. endflexible.metalsuetion drqp PlPQ- v. a v ,Elgg3isv awertlealsect en through the dish f v w; e i e '7 "Fig. 4 isa erticalhalfesectipnihreugh the bung fit ing, the catchbasinysupport and drain passagegthe catch'ba'siriandthe flexible dis'meunsecl 01'1 afssembleclonthe eent ainer fig I;

in threeuni eary parts These. are thei'buin g v screw designated generally. I by 6, feheeateh basin and suppbrtgdesignated generally by 7,.1and the pumpingg eguipment ,eompmsing ga' suction dropep ipe 8, a'pump 9,21 disehaz ge'for[ 5 9 delivery pipe 10, an automatic check valve 11 and a flexible hose 12, if desired. They are designed to be assembled on the container in the order named and disassembled in the reverse order.

The bung screw, best shown in Fig. 4, has at its lower end two terraced threaded portions designated by 13 and 1st. The two different sizes of screw and thread permits the same screw to be inserted in either the bung on the end or on the side of a metal drum or barrel. The number of these threaded terraces may be increased, if desired, to enable the screw to be inserted in bungs of various sizes.

When the assembly is adapted for use with containers having very small bungs it has been found convenient to provide a spider 61, Fig. 2, in order to stably support the assembly. The spider is equipped with an internal thread and screws over the larger threaded portion 13. A series of downwardly extending fingers 62 bear against the surface of the con tainer to stabilize the assembly.

A nut portion 15 of the bung provides space for the application of a wrench in tightening the screw. Above the nut portion is a crosswise slot 16 extending nearly halfway across the bung screw. A vertical slot'17 extends from the crosswise cut to the top end of the screw; A bolt 18 passes through proiections 19 on the bung screw at either side of the slot 17 and is provided at one end with a lever or handle 20. It will be observed that the inside diameter of the bung screw is somewhat larger than the outside diameter of the suction drop pipe. This permits the end of the catch basin support to rest between the two. When the bolt 18 is loosenedthe end of the catch basin support, designated generally by 21, may be partially inserted in the bung screw, taking the position shown partially in section in Fig.4. The lower part or sleeve of the catch bas n end 22 slips down into the bung screw and fits closely so that by a small adjustment of the handle 20 the top of the bung screw may be tightened. around it making a vapor proof connection. The distance which the catch basin support may pass into the bung screw is limited by. the annular flange 23. The catch basin support arm extends outward just above the bung screw in order that it have a maximum stability. Above the arm is a split ring portion 24 arranged in a manner similar to that at the bung having a tightening bolt 25 to draw the top of the catch basin support end closely around the suction drop pipe and form a vapor proof connection. 'This also serves to hold the suction drop pipe at whatever level it may be placed for use,supporting the pumping and dispensing equipment. A dram passage 26 is provided in the catch basin support and extends from the catch basin into the container through the bung screw by way of a small slotted passageway 27 on the inside of the catch basin support sleeve.

The catch basin consists of two parts, namely, a bottom half 28 attached to the support by means of a bolt 38 and having a projecting portion 29 resting within the flanged end 30 of the support, and a top half31 attached to the lower half through the hinge flanges 32 and 33 and the pin 3 1. A flanged opening 35 in the center of the upper half is closed by a. spring closure 36, except when held open by the nozzle of the dispensing hose presently to be described which it is designed to hold in order that any liquid dripping therefrom may be returned to the container. The upper half of the catch basin is adapted to be raised up on thepin 31 to an open position as shown in dotted lines, Fig. 4, to permit cans to be rested upon the ribs 37 when dispensing without the hose 12. When the basin is in the closed position the upper half held to the lower half through the force of gravity alone. The two come in contact at their peripheral rims 39 and 40 which are machined on their contact faces to smoothness whereby a normally vapor proof joint is formed. However, should pressure develop in the container the upper half of the basin will beraised by such excess pressure to permit the escape of vapors. Resting in the opening at the bottom of the lower half of the catch basin is a flame bafllecoinprising two layers of perforated sheet metal held in place by the bolt 38, the perforations in the lower disc being smaller than those in the upper disc. Because of the presence of these discs an exterior fire will not be able to work backward along the drain passage into the container and only such gases as pass through the bafile will burn. In this manner explosions due to vapor mixtures above the liquid in the container will be prevented. The discs also serve as a filter for liquid returning to the container.

The pumping equipment is adapted to be handled as a unit. The suction droppipe is inserted in the sleeve of the catch basin support and lowered to an appropriate depth in the container. Throughthe bolt 25 and the split collar 24 the suction drop pipe is capable of being held at any position in the catch basin support in order that the distance between the check valve 11 and the catch basin may be varied to fit the different sizes of cans and containers to be filled. In order that at all positions the suction drop pipe may reach to the bottom of the container and be capable of removing all of the liquid a collapsible section 39 is added. This is a smaller pipe made to fit closely inside the larger pipe 8 and having a packing gland 10 of the ordinary type to prevent air from being drawn in. However, where the pipe'i-BE) would be of such a small internal diameter as to make operation slow a flexible metal hose 41 may be attached arises-ass V 1 1 directly to thewend ofthe' larger-suotidn drop pipe. This has Lbeenfound advantageous when the-invention has been adopted ior use,

on eontamershavmg small buu gs- -W-h1eleanecess1tates a corresponding decrease "in T the Jan offset .5 3

size of all partsenteringtherein ineludingithe suction drop pipe. f 1 I f The upper end cit-thesuctiori droppjipe is attached to the suction end of a pump 9.

While any suitable type .of p unip may be used "I have'here shown a vane "pump of-the C0111- nlOn type operated bygnieansn't a'handle -12. A gooseneek 1 attaehed tolthel discharge ber 44,, separatedby adividingwall:a5thaving a circular opening d6 gAcheckfjball lZ bears against thebeveledupperedge ofthe C-l1CUl&T opening closing the" passage *between the chambers. V A spring 48 between the ball and a removable cap 49'urges the ball: downward againstthe beveled edges an'd serves to close the opening against a certain amount Of'hy' dr ostatic pressure. f This b all and'spring arrangement serves tojperinit the liquid to"; force d through the opening bythe operation of the pumpi'which increases the pressure upongthe liquid sufficiently to raisethe-ball against thepressure of the'spring. Pron /ctions50 it'romthe separatinwwall preventthe ball -iroin being displaced laterallv gbythe -incomingyliquid. Anozzle 5.1 "whieh extends downward" from the outer; chamberfis pro 'vided witha slot'52ialona'imo'st of its length ii to cause the'meniscus ofztheliquichto:breal:

' land the nozzle to ranidly'and' completely drain when the pump is stopped; Attention I is directed to the, fact that "thefloor oi the outer chamber. is flat permitting: all of the 1 liquid to drain rapidly through theslot in the nozzle. Thusno liquid is held in theehamber Where itmav subsequentlv form an explosive or inflammable mixture'withair.

W'hile' normally the liquid 'isfdisnensed throughithe'nozzle 51dire'ctlyinto small cans placed u'ponthe eatehibasin yet it has been found convenient to provide a hose for-"dis pensing" into larger jc'ontainers which are placed'unon and removed fromithe Catch basin withjdifiiculty. Therefore; female threaded portion 53 is provided 'to're'ceivethe threaded end; Qffl} flexiblehose I The connectionithus 7 made issuch that the-hose may beattachedfl p I 0 I sizes of containerswvherebydispensing may :125

and usedor not as desiredQt-he threadbeing little subject to damage beeauseof lts internal position. The fiexlbleh'ose cons sts ota hose,

a threaded nipple 54 at one: end adapted/to screw into the valve;v and an automatic ball check valve and nozzleiatthe othereii'dr' The hosevalve best shown in" F1 stee est-s01" it 'Will merelylbend andcoil up on the bottona t of the container when the suction. drop pipe 5 :changes maybe made;

a nipple portion 55', a threaded member 56, shaving -a beveled central opening attached to "the-nipple, a; threaded sleeve portion 57'adaptedto engagethe threaded member,' aball 58 'deslgne'd'to rest against said beveled opening,-

a-nend and nozzle portion 59 adapted to engage the :endof the sleeve portion, andv a springfGO between-said last named members i bearing upon the; ballv and urging it;forwa1td 'against the-beveled opening. It will beseen jthat'as'soon; as-the operator stops the pump thejpressure against the ball will be relieved and itvwill immediately be urged forward by "the spring stopping the openingand shutting ofithe flow ofliqu'id from the hose Without permitting it to drain. In this manner'the' dripping and--spillingof the liquid is materially reduced with a resulting reductionin 1 the fire-hazard. 1 Y

o "It will be observed that I have provided a convenient and highly fireproof transfer pump. The pump isquickly and easily assen1- bledon the container,;as follows: the bung screw is insertedin the bung and drawn tight; 7

the sleeve of the catch'basin' support is;in-'

sertecl in the bung'screw and the split eollar tightened; and the suction drop pipe is then inserted 'in the sleeve of the catch basinsupport} and pushed'down to the level desirech'depending upon the size of trans to befilled'. The i snlitcollar of the catch basin support may, 'then be tightened to holdthe suction drop jpipeJEWhen the suction drop pipeis inserted Y I wellinto the drum"; the-smaller bottomsection f 89 Wlll strike against the botto'm'of the ,con-

t ainer and telescope intothe' larger pipe as contlnue s to -move downwardl When the. flexible hose is used on the suction'drop pipe ofa' drum Zthe pi e- 39mm be forcedzup almost Completely into the larger pipe '8'. i 'VVhenused on theend' bung of a drumth'e suction droppipe will be almost completely extended. 1 Th'ewnianner of mounting the assembly;

slidably and rotatably ithin the bungscre-w aids materially in the adaptability of the pump. "The operator may conveniently lo ea'te' the dispensing nozzle and-catch basin Without moving the drum, He mayalso rd tate' thje ciatch basin Without moving the dispens'ing. nozzle] thus oiisettingthem for convemence 1n U5S1-l1g$i1e"hOSS. He -'ni-ay alte1'- the vertical distance between the catch. basin thefdis'pensing nozzle to differentbe had with the nozzle actually-Within the jeontain'er thereby reducing contactloi liquid and'air' with the resultingevaporation. At- I tention isjdirected'to the' ease and rapidity. -with WhlCll'AElIQSQ VHIlOUST a alterations and Operation of the pump will be seen to be particularly easy, safe, and economical. When the catch basin cover is raised the assembly is ready to dispense into cans and small containers. As the pump is operated the liquid is drawn up the suction drop pipe and forced over to the check ball at? where the pressure of the liquid lifts the ball against the pressure of its spring and the liquid flows into the chamber 4:4, down the nozzle 51, and into the can to be filled. hen the can is practically filled the operator stops the pump and immediately the ball i7 is forced down closing the passage and stopping the flow of liquid. The small amount of liquid remaining in the chamber and nozzle rapidly drains out because of the slottedconstruction. The few drops which may come after the can is removed are permitted to fall into the catch basin from which they flow back into the container by way of the drain passage. Should an extraneous tire occur during this rocess, the contents of the container are protected by the flame baffle across the drain passa e which is the only opening to the contalner. When the flexible hose is in use the flow of liquid is stopped in like manner. While the assembly is not being operated the vapors are held completely within the circuit since'both ends are closed from contact with the atmosphere. But while thus closed, any pressure which may develop in the container is automatically relieved through the catch basin cover which rests upon the basin.

Should fire cause the barrel to become heated the escaping vapors will burn upon the bafiie rather than be carried back into the barrel into what may be an explosive mixture.

While I have described a particular embodiment of my invention in use in a specific instance for purposes of illustration, I do not wish to be so limited. The invention contemplates broadly an assembly such as defined in some of the claims. It should be understood that various changes might be made in the construction and arrangement without departing from the spirit and scope of the I invention as expressed in the appended claims.

I claim:

1. A dispenser for volatile liquids compris, ing a bung screw adapted to engage the bung of a container, a spider positioned upon said bung screw arranged to brace said bung screw against said container, a return drip bowl, a flame baffle positioned in said return drip bowl, a drip return arm connected thereto and mounted upon the bung screw having a drip return passage leading to the interior.

of the container, a liquid pump, a suction drop pipe extending into the container whereby all of the liquid may be removed therefrom, a discharge pipe attached to the discharge end'of the pump, a check valve attached tosaid discharge pipe in a position convenient for discharging over said return drip bowl, and a discharge nozzle attached to saidcheck valve for directing the outcoming liquid into a container.

2. Adispenser for volatile liquids comprising a bung screw adapted to engage the bung of a container, a return drip bowl, a drip return arm connectedthereto and mounted upon the bung screw having a drip return passage leading to the interior of the container,-a flame bafiie positioned across said drip return passage, a liquid pump, a suction drop pipe having a telescoping section whereby saidpipe may be made to extend to the bottom of containers of varying depths for removing substantially all of the liquid therefrom, a discharge pipe attached to the discharge end of the pump, a check valve attached to saiddischarge pipe in a position convenient for discharging into said return drip bowl, and a discharge nozzle attached to said check valve for directing the outcoming liquid into a container.

A dispenser for volatile liquids comprising a hung screw adapted to engage the bung of a container, a return drip bowl, a drip return arm connected thereto and mounted upon the bung screw havin a drip return passage leading to the interiorof the container, a liquid pump, a suction drop pipe extending into the container, a discharge pipe attached to the discharge end of the pump, a check valve attached to said discharge pipe in a position convenient for discharging over said return drip bowl comprising an enclosure having an inlet and an outletchamber, a wall separating said cham- .chamber but short of the end of said nozzle to cause the meniscus of the liquid to break and the liquid to flow rapidly therefrom.

4. A dispenser for volatile liquids adapted to be mounted and dismounted upon a container in three unitary sections comprising first, a hung screw, second, a return drip bowl and a drip return arm, and third, a pumping assembly, the bung screw being the supporting member. in which the drip return arm and the pumping assembl are rotatably mounted and vertically adjustable which permits the distance between the discharge end of the pumping equipment and the return drip bowl to be varied.

5. A dispenser for volatile liquids comprising a hung screw adapted to engage the bung ofa container, a return dripbowl, a drip return arm mounted upon the bung screw and supporting the return drip bowl having a suction pipe sleeveat one end to rest within the bungscrewand about which the latter is adapted to be closely drawn, a suction drop pipe passingjthrough the sleeve of the drip return arm [and adaptedto be held at variable heights therein 'having adjustable means to permit the end of said suction drop pipe to reach the-bottom of the contairierregardlessof the height at which it is held in the bung screw, a liquid pump the suction end of which is attached to the suction drop pipe, and a discharge pipe attached to thedischarge end of the pump. N

6. A dispenser as set forth in claim 5 havingja check valve attached to the discharge pipe to stop the flow of liquid when the pump ceases, and a nozzle to direct the emerging liquid. 7 y

- 7. A dispenser for volatile liqulds comprising a hung, screw adaptedto' engage the bung nozzle connected to said check valve to direct of a container, 'afdrip return arm attached thereto having a drip return passage leading to the interior of the containena liquid pump, a suction drop plpe extending into the container, a discharge hose attac'hedto the discharge end of the pump, a check valve attached to said discharge hose, a discharge the outgoing liquid, a return drip bowl .in-

cluding an upper and lower section, the lower section having a plane rim, an opening into said drip return passage, and, a flame baflie 7 covering said opening, the 'uppersection T havinga plane rim, a centrally located opening for receiving the discharge nozzle whereby the drip may be returned to the con tainer, anda spring closure resting-. against the. lower side of said opening adapted to,

' beforced open bythe insertion of thenozzle and to close when said nozzle is withinsert able through the bung screw into the container, and means for securing said suction c.

drop pipe tosaidbung screw at variable elevations in a manner, substantially vapor proof, and means for bracing said suction drop plpe agamst said container.

11. A dispenser asset forthin claim 10 l havingadrip return armand a return drip bowl supported on said bung screw, and i a return drip bowl cover, said return drip bowlcover being adapted to receive the end of the discharge pipe to provide therewith a closed return conduit when the dischargesignature. V

J MERRITT C. l/VEMPLE.

a drain opening communicat In witness of the foregoing I afiix myv so I drawn, the rimson saidupper and lower sections being adapted to cooperate.

8 'A'dispenser for volatile liquids comprisinga bung screw adapted to engage the bung ofa' container, a sp1der arranged to engage :Silld bung screw and bear against sald container to brace said bung screw and asso: ciated parts, a pump hav ng a suction drop pipe slidablethrough the bung screw pro- 1 I vided with a lower end adapted to rest on the 0 bottom of the container when the pump is at difierentr elevations, and means for securing the suction drop pipe 'to the bung screw at said different elevations.

9. A dispenser for volatileliquids compris ,ing a pump having a suction drop pipe adapted to enter a container and an overhead discharge nozzle, a return drip bowl having a cover provided with an: Opening having a closure, and a delivery hose havinga delivery 7 nozzle insertable in said opening in the bowl coverfor closingthe delivery line.

r 10. A dispenser for volatile liquids having a bung screw adapted to engage theopening of a container, a pump having a "discharge pipe and a suction drop pipe the latter being,

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