|Número de publicación||US2344005 A|
|Tipo de publicación||Concesión|
|Fecha de publicación||14 Mar 1944|
|Fecha de presentación||21 Mar 1941|
|Fecha de prioridad||21 Mar 1941|
|Número de publicación||US 2344005 A, US 2344005A, US-A-2344005, US2344005 A, US2344005A|
|Inventores||Sundholm Edwin P|
|Cesionario original||Sundholm Edwin P|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citada por (15), Clasificaciones (7)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
March 14, 1944. P SUNDHOLVM LIQUID DISPENSING APPARATUS 4 Sheets-Sheet 1 III Filed March 21, 1941 INVENTO m a M m/ a March 14, 1944. E. P. SUNDHOLM LIQUID DISPENSING APPARATUS Filed March 21, 1941 4 Sheets-Sheet '2 IN V ENTOR. wpsma a ATTORNEY.
March 14, 1944. E. P. SUNDHOLM LIQUID DISPENSING APPARATUS Filed March 21, 1941 4 Sheets-Sheet 5 E. P. SUNDHOLM LIQUID DISPENS ING APPARATUS March 14, 1944.
Filed March 21, 1941 4 Sheets-Sheet 4 M w W;
AV 3% Y Patented Mar. 14, 1944 UNITED STATES PATENT OFFICE" LIQUID-DISPENSING APPARATUS Edwin P. Sundholm, Albert City, Iowa Application March 21, 1941, Serial No. 384,462
6 Claims. (01. 221-85) The present invention relates to liquid-dispensing apparatus in general, and it relates more particularly to pumping apparatus adapted for attachment to drums or barrels or like reservoirs containing various liquids, as for example gasolines, alcohols, kerosenes, light or heavy lubrieating or fuel oils of varying viscosities or other with respect to each other and with respect to the reservoir whose contents are to be dispensed, as well as from the standpoint of operating efliciency during actual use.
Other objects will appear more fully from the following detailed description, accompanying drawings and appended claims.
For the purpose of illustrating the invention, there is shown in the accompanying drawings forms thereof which are at present preferred, since the same have been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be'variously arranged and organized and that the invention is not limited to the precise arrangements and organizations of instrumentalities as herein shown and described.
Referringto the drawings, wherein like reference characters indicate like parts,
Figure 1 represents a perspective view of pumping apparatus constituting one embodiment of the present invention shown operatively engaged with a metal drum filled with liquid, said drum having a portion of its side wall broken away to reveal the lower telescopable pump inlet stem portion of said apparatus.
Figure 2 represents an enlarged fragmentary longitudinal sectional view taken through that portion of the pumping apparatus shown in Figure 1 which extends above the top end wall of the drum.
Figure 3 represents an enlarged side elevational view of the top right side of the apparatus illustrated in Figures 1 and 2, such as would be seen for example on broken line 3-3 of Figure 2, looking in the direction of the arrows.
Figure 4 represents an enlarged fragmentary longitudinal sectional view taken through the lower portion of the pumping apparatus illustrated in Figure 1.
Figure 5 represents a fragmentary view in perspective of the lowermost telescopable inlet end portion of the pumping apparatus illustrated in Figures 1 and 4, with a portion of outermost tubular side wall being broken away to reveal underlying details of construction.
Figure 6 represents a transverse sectional view through the cylinder portion of the pumping apparatus looking upwardly at the slidable apertured piston, such as would be seen for example on line 6-6 of Figure 4, looking in the direction of the arrows.
Figure '7 represents a transverse sectional view through the drum-engaging fitting at. the lower end of the pump barrel, looking upwardly at the check-valve housed therein, as for example on line of Figure 4, looking in the direction of the arrows.
Figure 8 represents an exploded view in perspective of the elements constituting the movable portion of the check-valve illustrated in Figure 4, as they appear before assembly.
Figure 9 represents a perspective view of modi-.
fled fittings made from steel stampings, which may replace the cast metal fittings at the upper and lower ends of the pump cylinder shown in the preceding flgures-portions of the fittings being broken away to reveal details of construction, and the intervenin pump barrel being indicated in phantom fashion by dashed-dotted lines.
Figure 10 represents a perspective view of the steel stampings Ill] and III as they appear when dis-assembled and showing a means for providing a vent opening alternative to that shown in Figure 9.
Figure 11 represents an'enlarged, fragmentary, cross-sectional view of the inner and outer tubes 89 and showing another method of forming a packing seal therebetween, alternative to that shown in Figures 4 and 5.
Figure 12 represents a view similar to that of Figure 11 showing another method for providing a packing seal-the packing being self-adjusting to maintain a tight seal.
Figure 13 represents a fragmentary, perspective view of the embodiment shown in Figure 11- the parts being dis-assembled.
Figure 14 represents a fragmentary perspective 1 2-the embodiment of the present invention is shown operatively engaged with'an upright cylindrical liquid-containing steel barrel or drum, indicated generally by the numeral 28. This liquid-containingbarrelordrum 2lmaybeoianysuitable shape and size,- and or any'suitable construction, a
one rorm or which has been illustrated in Figure 1. This illustrated orum is formed from relatively thin sheet steel, andincludes a cylindrical body portion2l having circular upper and lower ends 22 and 23 respectively secured in fluid-tight relation to the opposite end portions or said body 2|. The upper drum end 22 bears at least one internally-threaded bung-receiving hole. 24,
which is normally closed when the barrel is in ing the hung from the hole 24,-whereupon the pumpingapparatus of; the present invention may be'readily and easily attached to the drum by merely screw-threadedlyiengaging it with the internally-threaded bung-hole 24,-in the manner to be described more particularly hereinaften.
The dispensing apparatus illustrated in Figures 1 to '8 inclusive, constituting one illustrative embodiment of the present invention, includes an upright preferably steel pump cylinder 25, of relatively substantial internal diameter hearing at its upper end a spout-bearing cast-metal fit-- ting 28, and having its lower end screwed into 'a s epp d cast-metal drum-engaging fitting 21 adapted for screw-threaded engagement with the liquidfalso preferably includesaan internal annular gasket-seat 3|) disposed immediately above the lowermost opening29 for receiving'the gasket 3|. 7 When engaged, the upper end of the cylinder 25'abuts against the snugly-seated gasket 3|, thereby insuring a fluid-tight seal between cylinder and fitting. a I
An" arched'discharge spout portion 32 of the general configuration illustrated in Figures 1 and 2 may be formed integrally with and extend from the central domed" portion 28 of the upper fitting 28, or else this spout portion 32 maybe formed separately therefrom and then suitably permanently secured thereto, by welding or otherwise, with its internal passageway 33 in communication with the interior of said central domed portion 28. In thepreferred embodiment, r
the discharge end of the spout '32 is preferably disposed at ahigher elevation than the inlet end, which isitself disposed a substantial distance above the top drum end 22 by reason. of the intervening cylinder 25. This arrangement permits a receiving vessel ot'substantialheight and asceooe be provided with an outwardly and upwardly inclined boss or hook 25 over which the ball of .a receiving vessel may be placed, so that the vessel may be suspended from the spout in operative relation thereto and filled without waste.-
.-The extreme end portion of the spout 32 may also bear an external screw-thread II for connection with a hose end-coupling l'l so that the liquid dispensed may be conducted by the flexible hose 88 directly into a receiving-vessel or chamber remote fromthe dispensing apparatus, as for example directly into the fuel-tank of a tractor, or the like. V The upper end of the dome 28 bears a hollow cylindrical guide-stem. through which slidably extends a piston-rod 40, preferably of steel, having its lower end attached to the piston 4| inside the cylinder 25. The upper end 42 of the rod passagewaythrough the stem 38 is countersunk so as to guide the annular piston-rod packing 45, which may be impregnated with graphite, into closer and more intimate contact with the I reciprocable piston-rod 48 when thrust axially downwardly by the externally-knurled nut 44 a which scr'ew-threadedly engages with the stem 38.
v The piston rod 4fl-may be reciprocated manually,-or it may be motor-actuated. In the particular embodiment illustrated in Figures 1, 2 and 3, the piston rod 40 is manually actuable by ahand lever pivotally connected at its one end to the upper end of the piston-rod 48 and pivotally connectedto an intermediate point to the upperend of a link 45, whose lower end is pivotally secured to an outwardly extending 3!! boss 41 which may either be formed integrally with, or separately from and permanently se-- curedto, the head-fitting 28. v 1
As more particularly illustrated in Figure 3,
the lever 45 may be constructed from two juxta- 40 p0sed metal bars 48 and 49 of rectangular crosssection, having divergent end portions adjacent the piston-rod 40 providing the illustrated bifurcated arrangement which straddles said 5 piston-rod, and which may be pinned thereto by a headed pivot pin 50 secured against removal by the cotter pin 5|. The other end of the lever 45 may extend into a hollow handle 52, which may be formed from two juxtaposed concave the inwardly-extending handle at recesses 54, and
whose forward end portions may be riveted to the handle at 55. v v
i The link 45 which connects the handle 45 to the head-fitting 26 may be constructed from two juxtaposed metal bars 58 and 51, whose upper ends embrace the handle 45 and are pinned thereto by the pivot pin 58, and whose lower ends straddle the-upper end of the boss 41 and are pivotally secured thereto by the pivot pin 55.
If desired, however, in lieurof the hereinabovedescribed lever arrangement formanually actuating the piston rod 40, the upper end of said piston-rod may bear a cross-piece or T shaped handle 50 like that illustrated in Figure 9, which may be grasped by the operator and alternately rod 40.
Tothe lower end of the piston-rod 40 may be secured a shallow cup-like metal piston 4|, which may be pressed out of a fiat sheet-steel disc, with its periphery bent upwardly to provide an annular web of metal 5| of limited axial extent paralleling the cylindrical side-wall of the pumpcylinder 25. The outside diameter of this upturned marginal portion 5| "is preferably some- I pulled and pushed to reciprocate the pistonshells 53 of oval-shaped contour, spot-welded to :wliet smener. than the inside diameter ascaoosof the steel cylinder 25, so as to leave a slight gap between these two elements. The outer surface of the upturned marginal portion Oi bears an annular groove of'rectangular cross-section, and
in this groove is disposed a narrow trans-split piston-ring 62, also ofrectangular cross-section,
, preferably constructed from brass, although if desired it may be constructed from other material. This'piston-ring I2 is closely fitted to the sidewall of the cylinder 26, and is spring-tempered, and continuously exerts outward radial pressure against said cylinder wall, thereby providing an .eil'ective'fluid-tight seal between the'piston and The piston I may be secured to the rod in. any suitable manner, as for instance by having the lower end portion of the piston-rod 40 -reduced in diameter and extended through a centralhole in the piston, and upset on the underside of the piston to form the head 63. As more particularly illustrated in Figures 4 and 6, the fiat central zone of the piston ll bears a plurality of apertures 64, through which liquid trapped in the pump cylinder below said piston passes upwardly on the down-stroke of the piston. Immediately above and completely covering these piston-apertures 64 is disposed a preferably lightweight valve disc 65, of outer diameter sumciently smaller than the inside diameter of the piston marginal portion 6i to permit said disc 65 to seat itself snugly against the aperturehearing flat central zone of the piston 4i. This valve disc 65 is loosely slidably mounted on a pistonrod portion 66 of reduced diameter disposed immediately adjacent the piston 4i.
The lower end zone of the cylinder 2| is externally-threaded and is. screwed into the fitting 21 which is eng sed'with the drum 20. If desired, the very lowermostextremity of the cylinder 25 may be marginally inturned' to some slight extent, as illustrated in Figure 4. The upper outer portion of the fitting 21 is polygonal-shaped as .at It, to permit a wrench or other suitable turning toolto' be applied thereto for the purpose of screwing the fitting tightly into, or loosening it with respect to, the threaded drum bung-opening 24. The fitting 21 may be threaded externally-below the polygonal portion 88 for direct screw-threaded engagement with the threaded bung-holes'of various drums. Thus, for example, the zone II immediately below the polygonal portion 8| may be threaded for engagement with abung-hole of any standard size as for instance a two-inch bung-hole, and immediately below this threaded portion 69 may be provided a second threaded portion 10 of reduced diameter for I engagement with a standard bung-hole of smaller size, as for instance, a one and a half inch bung-hole. The particular diameters of these externally threaded portions of thefitting 21 may be chosen tosuit individual requirements and although two threaded portions ofdifierent diameters have been illustrated, it is to-be expressly understood that more or less than two threaded portions may be provided. This arrangement whereby the pumping apparatus is screwed directly into the bung-hole of the reservoir prevents any possible seepage of rain water or entry of dirt into the reservoir.
As more particularly illustrated in Figure 4, a suction valve of novel and inexpensive construction is housed inside the fitting 21 in opera-,
. depressed to provide the frusto-conical down- In actual operation, assuming the piston ll to 64 to the underside of the light-weight valve disc 85, unseating'the valve disc'and sliding it upwardly to the stop shoulder 61 which defines the upper limit of the piston rod portion 66 of reduced diameter. This leaves the piston apertures 64 unobstructed, permitting the piston I to descend freely and rapidly through the body of trapped liquid in the cylinder 25,'said liquid meanwhile flowing upwardly through the descending apertures 64 and passing to the upper side of the. piston, as'indlcated by the curved arrows in Figure 4.
At the end of the piston down-stroke, the valve disc 65 seats on the piston li over the piston openings 65, andwhen the piston ascends, the weight of the column of liquid above the piston holds the disc valve 65 firmly down against the piston as illustrated in Figure 2, thereby firmly closing the openings Bl and preventing escape of liquid downwardly therethrough as the piston ascends.
Th'e ascending piston 4| lifts the liquid above it and discharges it through the head fitting 26 and discharge spout passageway 33.
wardly-depending portion 13, whose walls bear a plurality of. openings 14 through which fluid may pass on its way up into the pump cylinder 25. The rim portion of the valve body H is preferably flat, and may rest between annular sealing members 15 compressed between the low- 'ermost extremity of the cylinder 25 and the juxtaposed internal shoulder 16 in the fitting 21.
The movable portion [2 of thesuction-valve includes a vertical stem 11 which passes with depression 13. The stem 11 has a headed upper end portion 18, originally of reduced diameter,
which extends through and holds together a air of juxtaposed clamping-plates l9 and 80. The uppermost plate I9 is generally flat throughout its central portion, with its margin being inclined first upwardly and then downwardly to form on the underside thereof an annular V-shaped trough having angularly-related side walls. The lowermost plate is also generally flat throughout its central portion, and has its marginal portion downturned in approximate parallelism with the outermost downturned marginal portion of the upper plate 19. Intermediate the marginal portions of these two juxtaposed plates 19 and 80 is disposed an annular sealing member Ii, preferably constructed from cork, although other suitable materials may also be employed. As illustrated in Figure 8, this sealing member 8| is of generally rectangular cross section prior to peripheral between and operatively preesedby-the marginal assaoos 7 portions of the juxtaposed clamp 's-plates ll and "II, the resilient member s i is deformed with 6 its outermost periphery assuming a somewhat spherical surface which is admirably adapted for sealing engagement with the annularly-contin uous concavely-coni'cal surface atthe based the depreued body portion ll.
- The valve stem 11 is constantly urged downwardly by a conicarvalve spring s: interposed between the lowermost end of the valve body and a cotter pin 83 extendingthrougha suitable transverse hole in the lower end of the valve stem. .L'Ihe individual coils of the valve spring slmaybeso arrangedasto allliein thesame plane when the spring is sufliciently-compressed. The thrust exerted by thisvalve springs! constantly urges the outer surface of the cork sealing ring ll into intimate sealing .contact with -.the concavely-conical inner surface at "the'base qt the depressed body portion II, and the mov- 'able valve-assembly]: being freeto adjust itself relative tcthe body "ll by'moving sideways or even tilting slightly if necessary, thecork ring ll will iind the best and most snugseat available, under theiniluence of this valve spring 02.
Inactual operation, the upstroke of the piston 4| creates suction on the upper side of the valve '12, which is amply sumcient to overcome the relatively slight downward force exerted by the valvespring '2, and lifts the valve upwardly, sucking liquid from the reservoir up through the pump inlet stemand through the valve-body openings It and past the unseated cork ring ll up into the pump cylinder 25. when the piston 4| ceases to move upwardly, the valve-spring 82 seats the valve ring ll snugly against the valve seat, thereby trapping the fluid which has already passed upwardly through the valve. The hereinabovedescribed suction valve, is highly efficient .in actual operation, and will seat properly regardless of the consistency or viscosity of the liquid being pumped, and will keepthe pump-cylinder 2i primed continuously and will not permit it to lose its charge.
'- face from entering or reservoir through saidrentpanageway and contaminating the lieuidcontentsthereof. 'Ihe-lowermostend of the ntting' #1 is'pro-' vided with an internally-threaded opening 80 into which maybe screwed the upper end'of a telescoping extensible pump inlet-stem arrange- -ment; This inlet-stem arrangement may include a relatively iixed tube as whose pper end is screwed'into said iittingopening 88, and whose lower end portion may be teleecoped into an outer tube ll of slightly larger internal diameter. The lower e'xtre'rnityu of the outertube It is bear notches llgwhich'permit the liquid at the @bottomofthedrumtoiiowfreelyintosaidhibe.
A venting passageway it extends through the side wall of the fitting 21, its function being to maintain constant atmospheric pressure inside the steeldrum It as the liquid contents thereof are depleted. In the embodiment illustrated in .I'igure 4, thisvent passagewayll includes a vertical branch ll ,drilled 'downwardlythrough the wall of the fitting, and a communicating inclined passageway ll drilled upwardly through the stepped side-wallportion of said. fitting. Where necessary, the fitting wall in the zone of the vent- J accommodate the passageway.
The provision ofthe vent passageway :as an integral part ofthe pumping apparatus of the,
present invention obviates the need for remove ing a second bung, where provided, to vent the inside of the drum or reservoir, and makes possible the emcient dispensing of the contentsof drumsor reservoirs which. are supplied with only one bung opening. [Further-more, the-location of the upper end of the vent passageway at an elevation substantially higher than that of the adiacent reservoir panel 22, and the absence of any flat surface of substantial area at said upper end eAsmoreparticularlyillustratedinl'iguresi and 5 of the accompanyin drawings, an annular packing ring 0:, which may be formed of cork or any other suitable material, is interposed between thetelescoping inner and outer tubes 8| and OI, and seals the joint therebetween. This tion, and may extend into an annular groove" formed near the lower end of the upper tube 8!.
' If desired, the packing ring 02 may be transsplit, with the plane of the out being non-parallel v with the center axis of said ring, and not intersecting said axiswithin the confines oi. the overalloutline of said ring.
In place of the arrangement shown in Figures 4 and 5 for forming a seal between the inner and outer tubes and Qty-there may be used the arrangement shown .in Figures 11 and 13. In this embodiment, the lower end of the tube" ll is turned down as at III so that it has a smaller outside diameter'than hasthe rest of the tube so. The lower portion of the turned-down end |2l is externally threaded as at I22.
About the upper, un-threaded portion of the Send iii are placed upper and lower steel washers i2! and I24 respectively; and an intermediate, continuous ring of cork, felt or other kind of pliable packing III. A nut III is then 'screwed on to the threaded portion I22 thereby to compress said packing I" in an axial direction and correspondingly to expand said packing III radially outwardly. This radially outward expansion causes said packing to provide a fluidtightseal between the, inner tube ll and the outer tube ll. 7 t 1 As said packing I" becomes worn from use, it maybe adjusted simply by further tightening the nut I20 to provide additional expansion and thereby again to form a fluid-tight seal.
I may also provide the sealing arrangement so shown in Figures 12 and 14. In this embodiment the lower end of the inner tube It is reduced or turned down as at II! to provide a cylindrical portion having a smaller outside dimeter than that of the remainder of the tube 8!. A steel wedge collar I 28 is provided with an inside diameter corresponding to the outside di-, ameter of the turned-down portion I21 and a frusto-conical, outer surface Ill, said outer surface terminating in an annular, outwardly-extendlng flange I atthe'lowermost portion 0! said collar-ill. a t This collar I2 is more or less permanently ntted aboutthe turned-down portion III by any appropriate means, as for'example by pressing of said vent passageway, prevents rainwateror is said collar m on to said portion I21.
of dirt or forcisnmatter which mightadapted to rest the drum bottom 28, and the lower side-wall portions of said tube Somewhat above the turned-down portion I21 an outward annular extension I3I is formed in the tube 88. This extension may be pressed out of the pipe 88 or said extension I3I may be formed by securing (by spot-welding, soldering ures Hand 14, it is also possible to provide one or more knobs or extensions circumferentially disposed about said tube 88-the.function of the extension I3I being merely to provide an abutment for a coil spring I32 to be hereinafter described. I may provide upper and lower, annular steel washers I33 and I38 respectively. I prefer to have the outside diameter of said washers approximately the same while having the inside diameter of the lower washer I 38 greater than the inside diameter of the upper washer I33-the inside diameter of said lower washer I34 being greater than the maximum outer diameter of the frusto-conical surface I28 of the collar I28. Between said upper and lower washers I33 and I88, I provide a continuous ring of cork, felt or other kind of pliable packing I35 which has a vertical outer surface I38 and an inclined inner surface I 31-said inner surface I31 being formed at generally the same angle as the outer surface I28 of the wedge collar I28. A coil spring I32 is disposed intermediate the upper washer I33 and the extension I3I on the tube 88 and urges the packing assembly downwardly over the outer surface I28 of the collar I28. The inclined surface I28 produces a cammlng action upon the packing I38 under the influence of the spring I32 so that said packing I38 is given a radiallyoutward component.
Thus, the spring I32 urges said packing I35 continuously radially outwardly and into contact with the inner surface of the outer tube 88. As the packing I35 becomes worn about its outer periphery, the spring I32 will expand further to force said packing I35 downwardly (upon the surface I28 of the collar I28) and consequently radially outwardly to maintain a fluid-tight seal between said inner and outer tubes 88 and 88 respectively. Thus, the embodiment shown in Figures 12 and 14 is self-adjusting and automatically maintains a fluid-tight seal between the inner and outer tubes 88 and 98 without the necessity for making periodic adjustments (as would be required in the embodiment shown in Figures 11 and 13).
In the embodiment shown in Figures 11v to 14 inclusive, the packing (I25 or I35) is made in the form of a continuous and uninterrupted annulus as distinguished fromthe split ring 82 shown in Figures 4 and and, thus, the possibility of leakage through the packing ring is further minimized.
In order to avoid accidental dis-assembly of the telescoped tubes 89 and 88, and to avoid possible injury to the packing ring 82, the upper margin of the outer tube 88 may be bent slightly inwardly as at 85, and a portion of the outer surface of the inner tube 88 immediately above the packing 82 may be pinched outwardly as at 88. Tu 88 is then prevenmd from sliding or being sli downwardly off of tube 89 by reason of the stop elements 85 and 88 coming into contact with each other. After the tubes 88 and 88 have been telescopically assembled, a cotter pin 81 may be inserted across the lower end of the outer tube 88 and 88 even when disassociated from the fitting 21.
The foregoing extensible telescopic inlet-stem arrangement is adjustable to fit drums or reservoirs of varying depths, thereby making possible the complete removal of all the contents of said drums or reservoirs.
In the embodimentillustrated in Figure 9 .of the accompanying drawin s, modified head and base fittings 88 and 88, stamped or pressed out of sheet-steel, are provided at the upper and lower ends of the pump barrel 28 (indicated in phantom fashion in dashed-dotted lines) in lieu of the cast fittings 28 and 21, respectively, of the first embodiment.
The head fitting 83 may be made up from a generally bell-shaped steel stamping or shell I 88 having a circular side-opening IN to the edges of which may be arc-welded the base of a discharge spout I82, which may be constructed from luxtaposed right and left oppositely-concave steel stampings which may be arc-welded together along their opposite meeting edges I88.
The lower portion of the head-fitting I88 is internally threaded at I88 for engagement with the upper end portion of the pump cylinder 25, and an internal annular shoulder I88 may be pressed out of the metal immediately above the screwthread I88 for seating the sealing gasket I88.
At the uppermost end of the stamping I88, a central opening I81 is provided, into which extends the reduced lower end portion of a pistonrod bushing I88. This bushing I88 may be perthe bushing I88.
The base-fitting 88 at the lower end of the pump cylinder 25 may bemade up from two permanently-telescoped sheet-steel stampings II8 and III. The outer stamping II8 is formed with polygonal seizure means I I2 at its upper end, and may be drawn or pressed by suitable dies into three generally cylindrical or slightly tapered stepped zones II 3, H4 and 5, of consecutively decreasing diameters, with annular shoulder portions connecting adjacent steps or zones. The
- inner surface of the largest-diametered zone H3 and the inwardly-extending annular shoulder at its lower and jointly afford a socket-like portion into which may be permanently telescopically press-fitted the upper zone II8 of the inner steel stamping I I I The next successively smaller zones III and H5 of the outer stamping II8 are each externally thre: ded, and are each adaptedto be screwed into threaded drum bung-holes of corresponding diameters, as for example, into bungholes of two-inch diameter and of one and onehalf inch diameter, respectively. The metal at' the bottom of the zone II8 of the inner stamping extends radially inwardly to form an annular shoulder I I1 on which may be seated the arrangement of annular sealing members 15 respectively disposed below and above the rim of the suctionvalve body H. The inner surface of the zone II8 88, thereby preventing separation of the tubes 7 is threaded for engagement with the lower end portion or the pump cylinder II, and when the sub-atmospheric 7 low the polygonal edge I II. o
assembled base-fitting I II is tightly screwed onto the lower end of the cylinder jss. the sealing members ll are cperetive'iy compressed between the lower end or .thecylinder II and the juxtaposed shoulder III, andthevelve body ll heldin position. I I
The central ions or the inner stamping] I8 is depressed below the, shoulder III sufilciently to provide room tor the suction-valve body II, with will be nrmiy' the side wells of said depressed sons and all other lowerwall-portions oi. the innerstampinlbeinl spaced inwardlyirom vthe juxtaposed wall-P tions or the outer-stamping by'some slight distance, to provide clearance therehetween;v The i very lowermost-extremity of the inner stamping" III is preferably downwardly flanged as-at III,"
and into the hole defined by this annular'fienge is screwed the'upperthreaded end otthe-fixed inlet-stem tube it. ;The.hole at the lowerend of the outer stamping, I II is of at least slightly larger this latter clearance space in turn communicates with the space insidethe drum above the contained liquid, thereby venting said drum.
Byv use or the embodiment illustrated in Figure, 10 the possibility oi contaminating the contents of the drum (as for example by water) is minimlse'd sincethe opening Ill extends horizontally rather than vertically when the pump is in use and since said opening III is more or less shielded by the overhang of the polygonal edge III The present invention may be embodied in other specific forms without departing from the I spirit or essential attributes thereof. and it is diameter than the outside: diameter otlthe tube 7 8t, thereby to provide a clearance spa e therebetween for a purpose which will presently ap- Bei'ore the outerandinner stampings III and I II are permanently press-fitted together, the innersuri'ece o! the outer stamping land the outer surface oi the inner s amll ll III preterably each have a similar groove II! cut therein, extending rromthe upper end of the zones which are ultimately tcibe press-fitted together, downw'ardlyto the other end of said zones, and-when these stampings are finally permanently telescoped togetherycare is taken to see that these similar-grooves III are in registration with each 7 other. These grooves Ill together form 'a vent passageway which extendsdowmwardly through the composite well bounding the press-fit cone of the assembled stampings. The
therefore desired that the present embodiments be considered in all respects as illustrative and not restrictive, rei'erence being had to the appended I'claims rather than to the foregoing descriptlon to indicate the scope of the invention.
Having thus described the invention, what is hereby claimed as new and des by Letters Patent, is: v V 1. In liquid-dispensing apparatus of the char-. acter described including a generally vertical pump cylinder, a fitting for the lower end oi said said fittingspaced below said shoulder adapted screw-threadedly to receive the upper end oian inlettube, and a suction-responsive check-valve housed in said fitting above said lower opening "and arrangedjto permit fiow of liquid therethrough solely in an upward direction, said lower end oi this vent pessagewayccmmunlcates withthe clearance space between the lower portions of the outer. and inner stampings III and III, and this latter clearancespace in turn communlcates with the space inside the drum above the contained liquid. In thls'fashion, the space check-valve housing having a rim portion extend ing over said internal annular shoulder. adapted to be caught between said shoulder and the juxtaposed lower end of the pump cylinder when the latter has been operatively screwed into the i the char-* inside the drums above the liquid is vented, and
pressures inside the drums are avoided.
In place of the grooves! cut in the stamp ingsIIl and Ill,asshowninl"lgure9,lmayprovide the construction shown in Figure 10 for venting the space inside the drum above the liquid.
in Figure 10 the inner and outer stampings II I and. III are shown dis-assembled. The inner stamping I II has vertical groove III cutthere-v insaid groove being similar to the groove I I! shown m Figure! except that it terminates short of the upperend oi the stamping II. The outer stamping- III has an opening Illin the zone III thereof-said opening III beingplaced iustbewn said outer and III arev permanently press-fitted together, care is taken tosee thatthe groove III in the inner Us lid and stamping III and the opening I2! in the 'outer' stamping lllare in registration with each'other.
Thus, theopening 'III' and the groove-II. to-
' getheri'orm a vent passage-way extending irom the'side otthe outer stamping I-Il downwardly throughthe composite wall bounding the press end of this ,ventpessage-way communicates with the clearance space between the lowerportions oithe outer andinnerstampingsll. and use fit zone 'ofthe assembled sta'rnpings. Thelower mouth of said fitting.
. 2. In liquid-dispensing apparatus 0 acter-described, operable to dispense the liquid contents of storage drums or the like, and including a generally upright pump cylinder adaptedto extend exteriorly of said drum and an inlet tube adapted to extend into the-interior of said drum, a base fitting for said cylinder having a plurality of difierent-diametered externally- I threaded stepped cylindrical portions adapted snugly to be screwed into difierent-diametered bung-openings of said "drums, an internallythreaded opening at the upper end oivsaid base fitting into which may be screwed the lower end 'ofjsaid pump cylinder, an inwardly :extending horizontal annular shoulder at the lower end of said intemally-threaded upper opening, polygonal seizure-means on the outer surface of said fitting adapted for engagement with a turning tool, an internally-threaded hole in the lower portion of said fitting adapted screw-threadedly toereceive the upper; end of said inlet tube, and a vent passageway through the wall of said fitting communicating at'its upper end with the atmosphere and having its lower and adapted ioriree communication with the space inside said drum above the containedliquid when said apparatus is operatively engaged with said drum.
3. In apparatus adapted for the liquid contents of storage drums orthe like hav- 4 ing internally-threaded bung-openings, al fitting ired to be secured 7 engageable with said bung-openings comprising two telescoped annular steel-stampings, the outer stamping bearing polygonal seizure-means adapted for engagement with a turning tool, and having externally-threaded lower end portions of varying diameters adapted for screw-threaded engagement with internally-threaded bung-openings of varying diameters, the inner stamping having its upper portion press-fitted into the upper mouth of said outer stamping, said upper portion of the inner stamping being internallythreaded, an annular inwardly-extending shoulder portion at the base of said internallythreaded upper portion, and an internallythreaded hole at the lower end of said inner stamping, and a vent passageway extending downwardly through the press-fit zone intermediate the assembled inner and outer stampings, said passageway being formed by registering juxtaposed grooves in the outer surface of the inner stamping and the inner surface of the outer stamping, the upper end of said passageway communicating with the atmosphere and the lower end thereof being adapted for communication with the space in said drum above the contained liquid when said fitting is operatively screwed into said bung-opening.
4. An apparatus adapted for dispensing the liquid contents of storage drums or the like having internally-threaded bung-openings, a fitting engageabie with said bung-openings comprising two telescoped annular steel-stampings, the outer stamping bearing polygonal seizure-means adapted for engagement with a tuming-tool, and having an externally-threaded lower end portion adapted for screw-threaded engagement with a corresponding internally-threaded bung-opening, the inner stamping having its outer portion pressfltted into the uppermouth of said upper fitting, said upper portion of the inner stamping being internally-threaded, and an annular, inwardlyextending shoulder portion, an internally-threaded upper portion, an internally-threaded hole at the lower end said inner stamping, and a ventpassage-way extending downwardly through the press-fit zone intermediate the assembled inner and outer stampings, said passage-way being formed by registering a groove in the outer sur face 01' the inner stamping with an opening passin: through the side wall of said outer stamping the upper end of said passage-way communicating with the atmosphere and the lower end of said passage-way being adapted for a communication with the space in said drums or the like above the contained liquid when said fitting is operatively screwed into said bung-openings..
5. In a liquid-dispensing apparatus adapted for operative connection with a liquid-containing drum or the like having an internally-threaded bung opening, said apparatus being thereafter operable to dispense the liquid therefrom, a genent-diametered cylinder portions having external screw-threads formed thereon, whereby said apparatus may be operatively connected to drums having diflerent-diametered bung-openings, and a spring-pressed check valve operatively mounted within said base-fitting and peripherally supported by said transversely-extending annular shoulder, said check-valve being held against displacement by the lower end of said cylinder. 6. In a liquid-dispensing apparatus having a generally vertical pump-cylinder and a lift-piston slidably mounted within said cylinder, a basefltting of sheet-metal or the like screw-threadedly connected to the lower end of said pump-cylinder, said base-fitting having a plurality of different-diametered inner bores separated by a transversely-extending annular shoulder, and having a plurality of different-diametered cylindrical portions having external screw-threads formed thereon, whereby said apparatus may be operatively connected to drums having difierentdiametered bung-openings, and a spring-pressed check valve operatively mounted within said basefltting and peripherally supported by said transversely-extending annular shoulder, said checkvalve being held against displacement by' the lower end oi'said cylinder.
EDWIN P. BUNDHOLM.
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|Clasificación de EE.UU.||222/382, 222/383.1, 417/566|
|Clasificación internacional||F04B9/14, F04B9/00|