US2869593A - Automatic shut-off valve - Google Patents

Description

c. v. zlEG 2,869,593

AUTOMATIC SHUT-OFF VALVE 2 Sheets-Sheet 1 Jan. 20 1959 Filed sept. i9, 1955 Jan. 20, 1959 c. v. zlEG AUTOMATIC SHUT-OFF VALVE 2 Sheets-Sheet 2 Filed Sept. 19, 1955 IN VEN TOR.

CUFFORD V. DE@

ou New ATTO meer AUTOMATIC SHUT-OFF VALVE Clifford V. Zieg, Fort Wayne, Ind.

Application September 19, 1955, Serial No. 534,921

11 Claims. (Cl. 141-208) This invention relates to an automatic shut-.off valve.

f More specifically, 'it relates to an automatic shut-off valve and operating mechanism therefor which are associated with a spout so that the entire yassembly may be substituted, as a unit, for the spout of a hand-operated nozzle f valve such as is commonly used on the hose of a gasoline f to the container when the liquid reaches a predetermined level therein and which is adjustable to vary the level.

A further object of the invention is to provide means for automatically latching the valve -in its closed position. Still another object of the invention is to provide means e for unlatching the valve for opening by the insertion of the spout into the container.

Yet another object of the invention is to provide means for preventing drainage of the control ducts when the nozzle spout is removed from the container.

Another object of the invention is to provide a mechanism of the kind described in which the valve i's held open during the dispensing operation and isclosed by a vacuum actuated motor when the container is filled to the desired level. i

Still another object of the invention is to provide a mechanism of the kind described which may be used on the nozzle of the ordinary filling station dispenser.

lUnited States Patent O ICC Referring first to Figure l, the numeral 10 represents the body casting of a common type of nozzle valve which includes an inlet boss 30, an outlet boss 50, Aand a trigger guard 70 having a trigger 90 pivotally mounted at 11 thereon. A spring closed valve (not shown) is housed by the body and thecap 13. The stem 15 of the valve extends through a packing box 17, and the end of the stern bears on the trigger for actuating thereby in a valve opening direction. t

Either the preferred or modified form of spout may be mounted in the boss 50 of the nozzle.

Referring now to Figures 2 and 3, the spout indicated generally bythe numeral 19 comprises a hollow fitting 21 which has a threaded end23 adapted to enter the boss 5l) of the nozzle body. The fitting is `provided with a hollow p boss 25 which is encircled by a flange 27'. i

` the inner surface of the nut for support thereby.

A further object of the invention is to provide a mechanism of the kind described which is rugged and positive in operation.

Still anotherl object of the invention is to provide a valve and valve operating mechanism which is in the form of a self-contained replaceableV unit and which may be inserted into or withdrawn from the spout as a unit.

Yet another object of the invention is to provide a spout of the kind described employing a unitary valve and associated operating mechanism in which the valve and mechanism may be removed by removingo-ne nut..

These and otherobjects will become apparent from a study of th-is specification and the'drawings which are `attached hereto, made a part hereof and ri which:

Figure l is a side elevation of a nozzle fitted with one form ofthe novel spout.

Figure 2 is a vertical sectional view of `the preferred form of automatic shut-off valve and spout together with the operating mechanism therefor.

Figure 2 showing the vacuum, liquid and control ports.

Figure 4 is a sectional view of thedevice `of Figure 2 taken substantially on the line 4-4 thereof, showing the valve and associated parts in the valve open position.

Figure 5 is a certical sectional view Figure 3 is a sectional View taken on the line 3-3 of i of -a modified form 'Qi said yal-vean@ .slquty T. j.. .f5.1

`52'so that it` will normally urge the valvetoward The sleeve 29 is counterbored at 39, and the mouth of the counterbore is preferably flared as at 41 to facilitate the entrance of an O-ring gasket 43 which is contained in a peripheral groove 45 formed in a radially outwardly extending flange 46 of a valve housing or bushing 47. The latter fits slidably within the counterbore of the sleeve.

The valve housing includes inwardly extending ribs 49 and 52, which terminate in an inwardly directed flange 54 adapted to receive the reduced shank 51 of the guide bearing 53. The flange 55 formed by the bearing and shank is positioned by the radial surface of the fiange 54.

The axially extending inner edges of the ribs are arcuate as shown at 57 (Figure 3) and serve as guides for the ange 59 on the valve 61. The inner surface of ange 54 adjacent the valve serves as a stop to limit the opening movement of the valve. l

The flange portion 46 of the valve housing is provided on its face with a pair of recesses or pockets 63 and 64 which communicate respectively with two fluid ducts 65 and 66 which pass longitudinally through the two ribs 49. The spaces 67 between theribs 49 and 52 form passages for liquid which communicate with the annular space 69 between the valve housing and the interior of the sleeve 29.

The third duct 71 formed in the rib 52 as shown in Figure 4 communicates atfone end with a recess 73 formed inthe flange 46, which recess in' turn communicates with the space 75 within the nut 3l and' with the atmospheric vent port 77.

A Venturi nozzle 31, as shown in Figure 2, is provided with an axially extending flange' 83 which fits into and is guided by the internal bore 95 of the valve housing 47 and is also provided with a radially outwardly extending flange which overlies the flange 37. Suitable gaskets 87 and 89 are interposed between the flanges 85 and 37 and 85 and the flange 46 of valve housing 47 respectively to seal the joints therebetween.`

A valve stem 91 is guidedrin the bearing 53 and has lconnected to it at one end, bymeans` of a stud 93, the valve 61. A piston or cup 97 is attached to the other end of the stem by a screw 99. A helical compression spring 101 is confined within the cup and fingers 49 and its` open position.

l '1 .egaeswos A cap 103 is fitted to the end of the valve housing 47 and heldvthereon by screws 105. A gasket 107 seals the joint between the valve housing and cap. The end or head of the cap is providedwithran axially directed opening 109. A circular, dished clamp 111 having a radially extending vFlange "112 :isals'oprovided with a centrally i. Vvlocated hole which is disposed ycoaxiallywith the opening 109. Ahollow bolt 113 is insertedin the opening and hole, and a nut 115 on the bolt'holds the 'clamp on the head of the cap. The head of the bolt is cross-drilled at 117 toform, with the hollow center of the bolt, an air passage therethrough.

An air passage 79 (Figure 4)passes through the Wall `of the'cap 103 and'communicates with duct 71 andwith Va recess or pocket Si) in a hollow cover 119 which'is held against a gasket 121cm the end'of the cap by screws 123. A diaphragm 125, of the FBellofram type, has its rim 127 'clamped against the cap by the clamp 111 and dil -vides the-space'disposed between the head of the cap and the flange 5d of the valve housing into two cham- -bers 129 and 131. The latter communicates with the chamber 132 in cover 119 and with recess 80 through the hollow bolt.

.The valve 61 has a circumferential groove 133 in which Y an O-ring 135 is disposed which is adapted to seal against v the frusto-conical inlet section 137 of the Venturi nozzle.

A lluid duct 139 formed in the Venturi nozzle con- .t

nects the throat 141 with the recess `or pocket 63.

A guide rod 143 is Vconnected to the valve 61, extended coaxiallythcrewith and is supported in aguide 147 which "is` supported centrally-in the tailpiece by a screw145. f,

A stop memberor lug 149 is'ixedv to the guide rod.

on the latch pawl to urge it toward the rod 143.1'The -pawl has a ilat end. 161 vwhich is adapted to'engage the s lugv149 when the valve occupies the closed position.

f An actuating lever 163 is also pivotally mounted on the pin 151 and has an ear 165 which engages the'edge A pivot pin 151 is mounted on the Venturi nozzle-and alatch pawl 153 is pivotallyrnounted thereon. A spring 155 is mounted on the pin and has one end 157 bearing on the Venturi nozzle 81 and the otherend'1-59 hooked Y `Prior "to the' operation of the device, the parts'shown in Figure 2 occupy their full` positions. The actuator 191 is adjusted on the rod 171 to the position at the distance from the end of the bore 213 which s proportional to the distance desired to be maintained between the rim of fill opening of the container to be lled andthe final level to`which the 'container Vis'rto be illed.

With thedispenser (not shown) in the? operative condition, the tailpicce' is -inserted'in thecontainer with the actuator 191rinpengagement with the rim of the tillopenirigth'er'ein` andfis Y to' its dashed line position. This action-opens the valve pressed downto move the valve rod V217 and moves the cam 187 past the end of lever 163 torot'ate'it'clockwisel` The ear 165 on the lever en- "gages and 'rotates pawl 153` clockwise and withdraws the "pawl from the lug 149. The spring 101' will thereupon withdraw the valve stem 91 and valve 61 to' the left,

'Figuren;underneath@ ofi-ing 1ss`f1-qmits1seat13i The fBellolfrar'n i125 is"collapse d and air is displacedtrom `cl'ra`ir`1ber131,'through hollow bolt 113,'chamber 132, recess 30, ducts- 79 and 71, recess 73, chamber '75 and vent '77 to' atmosphere. Y

Wh'entheftrigger 90 is pressed to' open its associated valve, liquidunder pressure will ilow into the tting 21 and, 'as vshown bythe arrows, will flow through the spaces 69, passages 6 7, around the valve 61, throughvthe Venf t`u`ri' nozzle 81 and tailpiece 35 into the container.

of pawl 153. A spring 167 is mounted on the pin and has one end hooked into the lever 163 and the other end hooked into the pawl 153. The'lever 163 extends througha s1ot-fl64 inthe tailpiece 35 and terminates in a spring chamber 169.

The spring chamber 169 is mounted onv the side of the tailpiece 35, and a valve rod-171 is slidably mounted in an opening 1.73 in the'cham'ber. A plug 175 having a coaxial pin 177`is screwed into an opening 179 which iszcoaxial with the opening 173. A compression spring Y 181 is mounted on the pin and the end of the rod. A 'v vretaining washer 183 is supported on the rod' and on a .s pin 185 set in the rod. The rod also' has ixed to" it a cam 137 which is adapted to actuate the lever-163 as described below.

A collarv 189 is slidably mounted on the rod outside of the chamber. An actuator 191 has a threadedfstud' 193 which enters a threaded opening. 195 lin the collarl and engages the rod. By loosening the actuator, the-collar may be adjusted along therod to vany desired' position.

An inwardly` directed boss197 is formed on -a valve body 209 and extends through a hole in the tailpiec'e 35. The .boss is provided with a channel or bore199 which is counterbored at 201. A second counterborev 203`provvides 'a receptacle for an O-ring gasket 205." rA plate I. 2071res'tson the vboss andY serves tocompress the gasket.

The valve body 209 is'mountedv onv the"exterio"r of f the tailpiece by'f screws 211 whichfpass 'through the tailpiece and draw the plate 207 down on the boss.

The valve body is providedV with 4a boreA 213 and a --'counterbore 215 with-both 'beingcoaxial' with thefvalve 4rod 171. lThezedge offthefbore 213 servesv as'alseatlfor the'l conicali point 217 on; rod whichf serves vlasfl'the valve.

` The flow creates a vacuumat the throat 141 ofA the 1 Venturi whichiisV communicated through duct`-139, recess 63'a"nd`{du"c"t 65 4to 'the' chamber 129. However, since valv`e'217 is' open and the bore 213 communicates'with the atmosphere through the till opening of the container, air will pass through the passages`215 and 199, tube 221 *and` duct 225 to the recess' 64 and duct 66 to chamber 129 so tliat'rthe vacuum created as described is dissipated. "Dispensing iscontnued until liquid rises in the contairier toasfutli'cie'nt height to cover the bore 213. When 4this occurs, liquid is Vdrawn into the bore, and since the "passages offer much'more resistance to flow of the liquid than they did to the flow of air as described above, the

vacuum builds up in chamber 129 to a degree sufficient 't'inyove the Belldfram to the right (Figure 2) p to compress the spring 101I and close the valve 61.v This action causesthe lug 149 to pass the end of the pawl 153 which .isu'nioved toits latchingposition with respectto the lug y liy'its spring' 155.

4"'With this' movement of the ""Bellofram air isdrawn into the chamber `131 from the vent 77 through 75, 71,

4fis, sogflskzgl'is'and 117. y l The Atrigger 90 is releasedto permit its associated valve to Vclose.`rll`hi=..tail1:\iece withdrawn from the container and thereupon the spring 181 will move rod 171 to the right closing the valve 217 to prevent liquid from dripping from the bore 213. The cam 187 passes the lever 163; rotating 'it vin a"count`erclockwise direction without effect. The lever i'sr'eturned to its 4normal A(full line) 'position b`yfts`I spring 167.

-Thelstructure is `thus"restored to its initial condition `Aready for' another operation.

' MODIFIED Fossi Faurey 5 y The modified form shown itiigurs' intended for Aducts 366 and 32S and tube' 321. f

a general purpose automatic shut-oit nozzle and isl without the valve latching and liquid level control devices disclosed in the preferred form.

a saab93 dispensed,,a valve mounted formovement between open "and closed 'position`s with respect to said conduit, resilient means connected to said valve to urge ittoward ated in an opening direction by spring 301 andin a closing direction by Bellofram 325.

Vacuum created at the throat 341 of the Venturi nozzle is transmitted through ducts 339 and its associated passagesincluding 365 to the chamber 329 while atmospheric pressure is transmitted to the chamber 331 on the other` side of the Bellofram by a duct system simi- 'lar to that described in connection with the preferred form.

Chamber 329 is also connected in communication with l the port 313 at the lower end' of tailpiece 335 by the OPERATION With the valve of the nozzle (Figure 1) closed, the

'valve 361 will be held open by spring 301. Assuming that the dispensing apparatus is operating, the spout 419 will be inserted in the till opening of the tank to be filled and thereafter the trigger 90 will be actuated to open the associated valve. Liquid will then iiow under pressure through fitting 323, passages 369 and 367, past valve 3,61, the Venturinozzle 381 and tailpiece 335 into the tank. The ow of liquid through the Venturi nozzle creates a vacuum in chamber 329 which is dissipated through the tube 321 and duct 313 which admit atmospheric pressure which enters from the open top of the tank. When the liquid level rises to cover duct 313, liquid will enter and since the duct oers a much higher resistance to the flow of liquid than it did to the air, a vacuum will be built up in chamber 329 which enables the atmospheric pressure in chamber 331 acting on the Bellofram to overcome the spring 301 and close the valve 361 which will be held closed by the liquid under pressure until the trigger 90 is released and its associated valve closes. As soon as the pressure on the valve 361 is relieved, the spring 301 will return the valve to' the open position. Liquid draining from the spout will flow into the tank, and when drainage is complete, the spout may be withdrawn 'from the tank. v

It should be noted that removal of the valve '61 or 361 from the associated spout can be readily accomi* plished by merely unscrewing the nut 31 or 331. which ,permits removal of the tailpiece, Venturi and associated parts and exposes the valve housing 47 and 347 which can then be withdrawn from the sleeve. It will be seen '.by inspection of the drawing that the valve, valve' stem,

spring, Bellofram, cap, cover and other associated parts which are connected to the bushing will thus bewith` drawn from the sleeve for such inspection, cleaning or repairs as may be required. If desired, an entirely lnew assembly of these parts may be inserted as a unit to re- @store the spout to service quickly, and the withdrawn unit may be repaired at leisure.

l While there have been disclosed hereina preferred and a modified embodiment of the invention for purposes of illustration, it is obvious that various changes may be made'in the form, construction and arrangement of the parts without departing from the spirit of the invention, and I do not wish to be `limited to the specific forms disclosed but desire protection falling fairly within the scope of the'appended claims.

What I claim to be new and desire to protect by Letters Patent of the United States is:

l. In an automatic shut-oit valve .mechanism` for a nozzle, the combination of means, including a spout,

u having inlet and discharge ends, and a vacuum creating l` .i Venturi nozzle defining a conduitmfor Vtheliquid v.being open' position, a uid motor operatively 'connected with saidvalve, separate means for `supplying air at atmospheric' pressure and vacuum created by said Venturi `nozzle to said fluid ymotor in a direction to close said valve in opposition to said yieldable means, a conduit having an opening disposed adjacent t'he discharge end of said spout, and connected with said vacuum supplyin'g means for dissipating the vacuum when said conduit opening is uncovered by liquid, said Venturi noz zie serving to build up said vacuum when said conduit opening is closed by liquid to cause said uid motor to'close 'the valve, the improvement comprising means for latching the valve in a closed position and actuator 'means operable by the insertion of said spout into a container for disabling said latching means, said actuator means 'operable to'lclose said valve when the spout is removed from the container.

2. In an automatic shutoi valve mechanism for a nozzle,'the combination of a spout comprising an inlet and held in place by said nut, said sleeve, bushing, Venturi nozzle andy tailpiece dening a conduit for liquid "being dispensed, a valve mounted on said bushing for movement between open and closed positions with-respect to said conduit, yieldable means mounted on said bushing for opening said valve, a uid motor mounted on said bushing and serving, when actuated, to close said valve in opposition to said yieldable means, separate conduit lmeans for applying air at atmospheric pressure and vacuum created by said Venturi nozzle to actuate said fiuid motor, a control conduit connected with said vacuum supplying means and having 'an inlet adjacent the discharge end of the tailpiece, said' control conduit serving to dissipate vthe vacuum when its inlet is not submerged in' liquid and serving to resist the ow of liquid there through to enable said Venturi nozzle Vto create the vacuum required to actuate said fluid motor, said iluid motor, yieldable means and valve being removable from said sleeve as a unit with said bushing when said nut is removed. 1

3. The structure defined by claim 2 in which said Venturi'nozzle includes an inlet section and said valve is formed with a circumferential groove which supports an Oring gasket in position to sealingly contact said section.

4. In an automatic shut-off mechanism for a nozzle the combination of means including a spout, having a discharge end adapted for insertion in a container and defining a conduit for the liquid being dispensed, a valve lmounted for movement between open and closed positions "with respectto said conduit, means for opening and closing said valve, Areleasable latching meansv'connected with said valveto hold `it closed, an elongated `discharge end of the spout and extending transversely of the rod and spout for engagement with and movement by a portion of the container to be filled when the spout is inserted in the container, and means connected to said element for releasing said latching means toopen or close the valve upon said movement of said'actuator.

5. The structure defined by claim 4l wherein the factuator is adjustably mounted on said element to regulate the extent of insertion of said spout into the container.

6. In an automatic nozzle shutofi` mechanism for a nozzle, the combination of means including a' spout,

"having al discharge end, and a vacuum creating Venturi nozzle defining a conduit for the liquid beingdispensed,

f1 niet Avalve' 'narrated ,far

nozzle when said second valve is closed positions with respe tfto j vmeans and at the other'end to a valve body'rii'ounted on the spout adjacent tl'iedischa'r'ge vend ofy the spout,

j "etwe'en'open'l and v A d dndu'it,`"mea`ns for ',"nrging saidwvalve open, an" actuable fiui'd"motor"v for ""'closing said valve,` epara'tmeanfs ,for supplying fluid f `under atmospherlil'pres'sure and under vacuumfcreated by said'Venturi `ijiez'zle'to' aetuate said motor, means for controlling the actuation of said motorjinclu'ding a `con aisee-i593 movement"to"open"said valve "by a 'portion f tle'llcontainer to be filled, as; the spout'fis' inserted therein,"said `ccntr'ol means serving' to'dissipa'te the vacuum created by when said port is in communication with uidfiinder l atmospherie pressure, and servingto promote 'the' creation duit connected atv one end to said 'vacuum supplying meansdefining an inlet'duct on said body'whicli is in lcommunication 'with said,` conduit, a` 'second' valve fclose' Vsaid duct, 'an actuator yconnectedl with said second vvalve` andextending transversely of s'aidlSPllt; for en'- "gagement Vwith andimovement 'to'open saidvalve by a n t poition'of thecoi'itainer to be AVfilled, Yas' the spout is "insertjedftl'iereiii, said control means serving to'dis'sipate the vacuum' created byfthe"/"eiitl'irii nozzle When said second valve is open and 'when said port is i'n` communication with 'fiuid under atmospheric pressure', and serving to promote the creation of a vacuum by'said"Venturi 'elosed'andwhen said duct is'closed by. liquid. l y A 7. The structuredetined by claim q6v in Which yieldable means are 'provided for urging said`second valve closed. 8. In an automatic nozzle shut-off mechanism for a ing a discharge end, anda vacuum creating Venturinozzle deiiing a conduit for the liquid being dispense/:da first valve mounted for movement between` open and closed positions with respect to said`conduit, means for urging said valve open, lari actuable `fluid, motor for closing said valve, separate meansV for `supplying' fiuid under atmospheric pressure and u'rider vacuum `created by said 'Venturi nozzle to actuate said motor, means for controlling the actuation of rsaid motor ,includinga conduit connected at` one end `to said 'vacuum supplying means and at the other end to'a valve'body mounted on the spout adjacent thefdischarge end of the spout, means defining an inlet ducton said body `which is in communi- A cation with said conduit, a second valve mounted for movement in'said bodyto open and close said duct, an actuator connected with said second valve and extending transversely of said spout for engagement with and move- "mounted for movementV in saidbody to'open and 'il y iarranged for'adjustment of said actuator'relatiile tofsaid "of'a vacuum by said Venturi nozzle when' saidsecond valve is closed and when"said'duct is closed by liquid,

"valve tol'position the actuator at different distancesfffrom tlie discharge end of said spout to regulate the'de'p'th of lenty'or" said spout intoythe container.

l0. In anautomatic nozzle shut-ofi mechanism for a nozzle, the combination of means"in`cluding a"`/spout, having a discharge end, and a vacuum creating Venturi nozzle defining a conduit for the liquid being dispensed,

" a first valve mounted for movement between open and lclosed positions with respect to said conduit, "means for urging said'valve open, an actuabl'e fluid motor Vfor closing said v'alve, separate means for supplying fiuidunder 'atmospheric pressure and under vacuumcrea'ted by"said a a Venturi nozzle to actuate said motor, means nozzle, the combination of means including a spout, havfo"controlling the actuation of saidv motorincluding'" ""nduit v connected at one end' to saidV vacuumsupplying means and at the other end to a Valve mounted body m inted dn the spout Vadjacent the discharge end saidduet, "an actuator connectedwith'said second valve andextending' transversely of said spout for' "engagement 'l with and movement to open' said `va1v`e by a portion 'o'f the container to be filled, as the' spout'is' insertd'tli'erein,

` ,said control 'means' serving to' dissipate the"y'acuum ""'ope'n and when'said port is in" communication fwitlifluid l,created by lthe Venturi nozzlewhen said Vsecondi'lalfe is under atmospheric'pressure, and serving'to'jpromote the creationof `a vacuum Vby said 4Venturi nozzle'vvlie'said second valve is closed and when said' duct'i's'close'd by ment-to open said valve by a portion of the container to be filled, as the spout is inserted therein, said control means serving to dissipate the vcauufm created by the `Venturi nozzle when said second valve is open and when said port is in communication ywith u'id under atmos pheric pressure, and serving to promote the creation of a j valve, a latch pawl `pivotallymounted on saidspout for liquid, "means for relea'sably datching Asaid y iiristfvalve closed including a"stop`"'me'mber connected wi`th`=said il" Yengagement Awith said'stop 'member when the" valve is titiv -vacuum by said Venturi nozzle when said second valve istclosed and when said-duct is closed by liquid, means L for releasably'latching said frstvalv'e closed, andmeans Voperable by said actuator upon movement-"thereof by -contact with the container for 'releasing said latching means.

y9. In an automatic-nozzle lshut-ofi? mechanism for a nOZZl the Combination Of means IlClUdlIlg `a POU,

' havinga discharge end, and a vacuum-creating Venturi nozzle defininga conduit for the liquid being dispensed, l a first valve mounted for movement between open and closed positions with respectto said. conduit,l means for urging said valve open, an actuable liuid motor for closing said valve, separate means for supplying fluid under t Yatmospheric pressure and under lvacuum created by Vsaid lVenturinozzle to actuate said motoigrneans for Vcon- "lever is actuated'in one 'direction,`cam means iri closed, means foryieldably lurging said pawl toward engaging'po'sition, av lever pivotally 'mounted bnsaidwspout and having means disposed forcontactwithsaid 'pa""'l' and "adapted Vto'pivot said pawl away from said'stop vvh'y :said `nted for movement `W`ith said second valve and disposed to 'inove said lever in' said one`direction when Said'second 'valve isopened. i 1'1. In an automaticshut-of'valve"mechanism.for a `nozzle", the' combination of"means',' in'cluding` 'a"-spout,

having inlet and discharge en'dsg'and ava'cuurr'f creating Venturi 'nozzle defining aconduit for the Vliquid being dispensed, a valve mounted for movement'betwe'en open and closed"positions 'with respect to said"conduit,"iesilient means'connected to said valve to` urge'ittowardfopen V` Nposition, 'a fluid motor operativelyconnected `Witli'f'said e5" t pressure'andvacuum created by said Venturi Znozzle to trolling theaetuation ofsaidgmotor includingwa conduit connected at one end to Vsaid vacuum supplying means and at the other end to a valvefbody mounte'd'on the f spout adjacent thedischar'ge end'of the spout,'"means devalve, separate means for supplying air'` atatmo'spheric saidiiu'id' motor infa direction vtoclose said valvein op- 'position to said"yieldable means, "a conditdiaviii'g an opening disposed adjacent the-discharge end lofxsaid spout, and connectedv withsaid vacuum supplyingI means for dissipating the vacuum when said'Y y"conduit opening ,.isA uncovered by liquid, SadVe'nturi nozzlefserving to b uild up y'said vacuum when said"conduit opening is losjed b'yjliqiiid to Vcause sai'dffiuid motor the "valvejfrneans incliidir'ig a stop` memberattacli'e'd to the valve for movement therewith, a latch pawl pivotally mounted on said Venturi nozzle, means urging said pawl into holding engagement with said member when said valve is closed and means operable from the exterior of said spout for releasing said latch pawl from said member when said spout is inserted into an opening in a container.

References Cited in the le of this patent UNITED STATES PATENTS Killman et al. Nov. 29, Grise Nov. 24, Sitton et al. Nov.` 24, McGee Nov. 30, Grise July 20, Logan et al. Nov. 7, Grise Nov. 14,

Slattery Aug. 17,

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