US3224472A - Liquid-dispensing nozzle with automatic cutoff - Google Patents

Liquid-dispensing nozzle with automatic cutoff Download PDF

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Publication number
US3224472A
US3224472A US273895A US27389563A US3224472A US 3224472 A US3224472 A US 3224472A US 273895 A US273895 A US 273895A US 27389563 A US27389563 A US 27389563A US 3224472 A US3224472 A US 3224472A
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Prior art keywords
housing
members
liquid
spigot
membrane
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Expired - Lifetime
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US273895A
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English (en)
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Ehlers Karlheinz
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/42—Filling nozzles
    • B67D7/44—Filling nozzles automatically closing
    • B67D7/46—Filling nozzles automatically closing when liquid in container to be filled reaches a predetermined level
    • B67D7/48—Filling nozzles automatically closing when liquid in container to be filled reaches a predetermined level by making use of air suction through an opening closed by the rising liquid

Definitions

  • My present invention relates to a nozzle with automatic cutoff used in the filling of receptacles with liquid from a suitable dispenser having a so-called nondraining hose, e.g. as conventionally employed in the dispensing of metered quantities of gasoline or the like to the fuel 'tanks of automotive vehicles.
  • a further object of this invention is to provide an automatic cutoff device for such nozzles whose sensitivity and operational reliability are substantially independent of the rate of liquid flow through the nozzle so that variations in that rate, due either to different settings of the control handle or to extraneous factors (eg. sluggish or erratic operation of an associated fuel pump), do not affect its functioning.
  • a nozzle whose tubular housing forms a guide path for two slidably, preferably telescopically, interconnected valve-control members in its interior and further forms a space separated from that interior to accommodate a piston such as a flexible membrane, one part of this space (advantageously adjacent the outer surface of the membrane) communicating with the aforementioned air channel of the associated spigot, the same part of this space also communicating via a low-pressure passage with a point along ⁇ the path of liquid flow through the housing so that suc- 3,224,472 Patentedl Dec.
  • the space of the piston chamber adjacent the outer surface of the deformable membrane communicates with a passage which opens into t-he interior of the housing at a location close to the valve seat at which the housing is internally constricted; from a more forward location, where the housing diverges internally to form a region of enlarged effective cross-sectional area and consequently retarded liquid flow, a pressure-relief or bleeder passage defined by the two relatively displaceable valve-control members extends to the opposite space of the valve chamber, i.e.
  • the membrane is drawn inwardly, i.e. into a position in which the two valve-control members are held latched, thus guarding against accidental decoupling thereof, until the overriding suction created in the first-mentioned low-pressure passage displaces the membrane outwardly to permit reclosure of the valve.
  • valve body is slidably carried on its supporting member and urged against its seat by a relatively weak spring at all times, thus also when the supporting member is drawn forwardly by the control handle to unblock the flow, so that the separation between valve body and Valve seat will depend on the fiuid pressure from the hose connected to the rear end of the nozzle housing;
  • the pressure-relief passage leading via the telescoped valve-control members to the underside of the membrane has an inlet in a clearance formed between the valve body and its supporting member, the width of the clearance thus changing inversely with fluid-delivery pressure if the pump feeding the hose should operate at least than its normal capacity (owing, for example, to a clogged ilter).
  • An added advantage of the presence of the aforedescribed pressure-relief passage is its ability to transmit to the piston or membrane a valve-closing impulse in the event of a-sudden pressure surge in the supply line, as may occur if, for example, a plurality of nozzles and hoses are connected to a common pump and all but one of these nozzles are cut off at the same time.
  • the sudden inrush of liquid could flood the receptacle fed by the remaining nozzle, yet the outward displacement of the membrane caused by the sharp pressure increase shuts ofi the supply before any overflowing can occur.
  • FIG. 1 shows, in axial section, a nozzle embodying my invention
  • FIGS. 2, 3 -and 4 are sectional views taken on lines Il-IL III-III and IV-IV, respectively, of FIG. l;
  • FIG. 5 is a view similar to FIG. l, showing the nozzle in operated position.
  • the nozzle illustrated in the drawing comprises a tubular valve housing 1 to whose front end a spigot 2 is threadedly secured; the rear end of housing 1 has screwed into it a nipple 5 with threads 38 by which it can be attached to a nondraining hose 39 of a, conventional fuel Vpump not shown.
  • Nipple 5 forms a valve seat 3 normally engaged by a valve body 4 which, in the specific embodiment shown in the d-rawing, is of frustoconical configuration; other, e.g. disk-shaped, types of valves may also be used.
  • a pistol-grip handle 6 is pivotally attached to the exterior of housing 1 by a lever 15, rigid therewith, which is fulcrumed in the lower housing wall by a pair of pins 14a, 14b.
  • This housing wall has a bore 40 through which the lever 15 passes and which is sealed against the outside by a fluid-tight plug 18 of fuel-resistant rubber or other elastomeric material; plug 18 is held in place by a split ring 19 seated in an annular groove of the housing wall. As shown in FIG.
  • lever 15 is formed with two lateral arms 20a, 2Gb which are received in recesses 41a, 41b and through which the pins 14a, 14]) pass without traversing either the plug 18 or the main body of lever 15 embraced thereby, hence these elements need not be perforated.
  • the upper end 15a of lever 15 is received in a slot 16 of a rod 37 extending axially within housing 1, the forward end of this rod also carrying a rod 17 forming an abutment for the lever end 15a.
  • Rod 37 constitutes the inner one of two telescoped valve-control members slidably but nonrotatably guided in the housing 1, the outer one of these members being a sleeve 7 which also has a slotted front end straddling the extremity 15a of lever 15.
  • Sleeve 7 slidably supports the valve body 4 by means of a thimble 42 rigid with that sleeve, the valve body 4 having a forward extension 43 projecting into the bore of thimble 42 as well as a rearward extension 44 guided in a stationary bracket 45 having a vent 46.
  • a relatively strong coil spring 8 surrounds the sleeve 7 and is confined under pressure between a flange 13 of thimble 42 and a shoulder 12 of housing 1; this flange has a rear face defining with the front face of valve body 4 a variable clearance 47, a minimum separation between these two faces being always positively maintained by spacers 48 on the ange 13.
  • a coil spring 9 weaker than spring 8 is seated in thimble 42 and bears upon valve body 4 so as to urge the latter rearwardly with reference to sleeve 7 and onto the valve seat 3.
  • An annular gasket is inserted between housing 1 and nipple 5 to prevent any leakage of fluid between the rear end of the nozzle and the hose 39.
  • thimble 42 has an instinct 49 through which the interior of the thimble communicates with an .annular channel 35 formed between the telescoped members 7 and 37-
  • a further -compression spring 36 also weaker than spring 8, occupies the channel 35 and tends to maintain the members 7, ⁇ 37 -in their normal relative position illustrated in FIG. 1.
  • a cylindrical bushing 11 is held in place within housing 1 by the nipple 5 ⁇ and has a forwardly diverging inner Vwall surface in the region surrounding the clearance 47 channel 27 terminating in a port S1 near the free end of the spigot.
  • Another port 52 in the opposite end of the spigot connects channel 27 with an annular recess 53 in the front end of nozzle housing 1 from which a passage 54 leads to the upper compartment 31' of a piston chamber whose lower compartment 31" is separated therefrom by a piston means here constituted as a flexible membrane 26.
  • This membrane which could be held in position within its chamber in a variety of ways (as, for example, by being formed with a peripheral bead received in an annular groove of the chamber wall), is here shown clamped between 'an annular shoulder 55 and a cap 32 screwed into the upper compartment 31.
  • An annular gasket 34 forms a huid-tight seal between the cap 32 and the .adjoining part of housing 1.
  • a bolt 33 extending radially of the nozzle housing, centrally traverses the membrane 26 which is seen to lie parallel to the housing axis.
  • Bolt 33 is secured to the membrane in air-tight manner by a nut 56 and a pair of washers 57, 58; the head of this bolt supports a cage 23 of the latch means which is of inverted U-shape as best seen in FIG. 3, so that the latter is limitedly rotatable thereon .and also has some play in the direction of the bolt axis.
  • the cage 23 is provided, at the lower ends of its two sides, with a pair of slots 25 which extend in longitudinal direction of the telescoped members 7, 37 and accommodate a pair of latch yrollers or pins 24 constituting the axially displaceable elements of the :latch means for releasably coupling these members together.
  • Sleeve 7 and rod 37 are provided with formations such as lateral recesses 21 and 22, respectively, which are normally aligned to receive the rollers 24, the longitudinal extent of these recesses being substantially less than that of the slots 25 whereby the assembly 7, 37, is axially displaceable from the valve-closing position of FIG. 2 to the wideopen position of FIG.
  • a coil spring 30 in a recess of cap 32 bears upon membrane 26 to urge it inwardly under light pressure, thereby tending to maintain the rollers 24 engaged in both recesses 21, 22.
  • the membrane can ex outwardly only so far that the rollers .are lifted out of the inner recess 22 on rod 37.
  • Cap 32 is provided with two peripheral ports 65, 66 of which the former communicates with the test passage 54 connected with air channel 27 whereas the latter leads to a bore 28 forming part of a low-pressure connection between the .space 31' above the membrane and the valve seat 3.
  • the latter connection includes a peripheral passage 28a between bushing 11 and the adjoining housing wall as well as a radial passage 29 between that nozzle and the nipple 5.
  • a further low-pressure passage interconnects the space 31" below the membrane 26 and the diverging internal region of the nozzle just forwardly of the valve seat, this passage including the clearance 47, the orifice 49, the channel 35, the recess 21 in sleeve 7 and the aperture 59 of boss 60.
  • the last-mentioned passage serving to relieve the pressure below the membrane, is always filled with liquid from the supply hose 39; it will be noted that the path between space 31 and channel 35 is substantially interrupted by the cage 24 in ape-rture 59 when the cage rests in its bottom position illustrated in FIGS. l and 3.
  • spring 8 is expanded to press the valve body 4 against its seat 3 through the intermediary of sleeve 7.
  • the sleeve and its companion rod 37 are in their normal relative position in which their recesses 21, 22 register with each other and are interlinked by the latch rollers 24, the membrane 26 being deflected downwardly by its biasing spring 30.
  • Test passage 27, 54 is open to the atmosphere and no suction is developed at the inlets 47, 29 to the upper and lower membrane compartments 31', 31" since no liquid flows past the valve 4.
  • the lifting of the nozzle from its holder on the pump housing actuates the pump motor in the conventional manner so that pressure is built up in the Supply hose 39 which is always lled with liquid.
  • the operator pulls the handle 6 to swing it counterclockwise about its fulcrum 14a, 14h into the rapid-feed position of FIG. 5, or into the slow-feed intermediate position in which the detent 62 hooks onto the stud 64.
  • a nozzle with .automatic cutoff for dispensing liquid from a nondraining hose comprising a tubular housing with an open front end and with an open Irear end connectable to said hose;
  • a elongated spigot secured to said front end, said spigot having a relatively wide filling channel communicating with the interior of said housing and a relatively narrow air channel extending from a location within said housing to a port yopening into the atmosphere near the free end of said spigot;
  • pressure-sensitive piston means in a space of said housing separated from said interior;
  • valve body axially movable in said interior, said housing being provided near its rear end with a constriction forming a valve seat;
  • first spring means in said housing bearing upon said one of said members for urging said valve body against said seat, thereby blocking the flow of liquid through said housing;
  • a handle externally mounted on said housing said handle being provided with ⁇ an extension projecting into said housing, the other of said members being linked with said extension for forward displacement away from said valve seat upon movement of said handle from a normal position to an off-normal position;
  • said housing being formed with a rst passage extending from said air channel of Vsaid spigot to a part of said space on one side of said piston means, said housing being further formed with a second passage extending from said part of said space to a point along the flow path of said liquid through said interior whereby suction due to said flow becomes effective upon 4the blocking of said port to displace said piston means, said latch means being linked with said piston means for disengagement from at least one of said formations upon suction-induced displacement of said piston means, thereby enabling said first spring means to restore said one of said members to flow-blocking position, said latch means comprising a slotted cage and roller means movable in slots of said cage in
  • a nozzle as defined in claim 2 further comprising additional spring means in said .housing resisting deformation of said membrane by said suction.
  • a nozzle as defined in claim 1 wherein said point along the flow path of said liquid is located close to said valve seat, said members defining a restricted third passage extending frorn a part of said space on the other side of said piston means to another point along said flow path for subjecting said piston means to a partial vacuum weaker than said suction, thereby urging said coupling means into engagement with said formations in the unblocked condition of said port.
  • a nozzle as defined in claim 5 wherein said housing diverges internally just ahead of said constriction, thereby forming a region of enlarged effective cross-sectional area and retarded flow forwardly of said valve seat, said third passage. communicating with the interior of said housing in said region of retarded flow whereby said third passage will transmit to said space a suction always smaller Ithan that transmitted to said space via said second passage upon a block-ing of said port.
  • a nozzle as defined in claim 1 wherein said other of said members is la rod with a slotted front end, said extension comprising a lever pivoted in a wall of said housing and received in said slotted front end, said lever being fulcrumed in said wall, said nozzle further comprising a resilient ring forming a fluid-tight seal about said lever in the region of its fulcrum, said handle being provided with indexing means for releasably retaining it in any of a plurality of different off-normal positions.
  • a nozzle as defined in claim 9 wherein said one of said members is a sleeve telescopically receiving said rod, said formations being a first lateral recess in said sleeve and a second lateral recess in said rod registering with said first lateral recess in said predetermined relative position, sa-idslatch means including at least one pin permanently lodged in said first recess and receivable in said second recess in said predetermined relative position.
  • a nozzle with automatic cutoff for dispensing liquid from a nondraining hose comprising a tubular housing with an open front end and with an open rear end connectable to said hose;
  • a elongated spigot secured to said front end, said spigot having a relatively wide filling channel communi- -cating with the interior of ⁇ said housing and a relatively narrow air channel extend-ing from a location within said housing to a port opening into the atmosphere near the free end of said spigot;
  • valve body axially movable in said interior, said housing being provided near its rear end with a constriction forming -a vave seat;
  • first spring means in said housing bearing upon said outer one ot said members for urging said valve body against said seat, thereby blocking the fiow of liquid through said housing;
  • a handle externally mounted on said housing said handle being provided with an extension projecting into said housing, the inner one of said members being linked with said extension for forward displacement away from said valve seat upon movement of said handle for a normal position to an off-normal position;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Nozzles (AREA)
US273895A 1962-04-19 1963-04-18 Liquid-dispensing nozzle with automatic cutoff Expired - Lifetime US3224472A (en)

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Application Number Priority Date Filing Date Title
DEA0040006 1962-04-19

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US (1) US3224472A (de)
AT (1) AT245419B (de)
CH (1) CH401725A (de)
GB (1) GB972206A (de)
LU (1) LU43573A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323560A (en) * 1964-03-26 1967-06-06 Ehlers Karlheinz Liquid-dispensing nozzle
US3332457A (en) * 1964-10-12 1967-07-25 Goodyear Tire & Rubber Discharge spout
US3646974A (en) * 1970-03-23 1972-03-07 Dover Corp Automatic shutoff dispensing nozzle venturi
US4735243A (en) * 1985-08-09 1988-04-05 Karlheinz Ehlers Safety device for a liquid-dispensing nozzle for fuel
US6126047A (en) * 1998-08-06 2000-10-03 Tuthill Corporation Dispensing nozzle
US6997220B1 (en) * 2003-10-24 2006-02-14 Knubox Technologies Fuel dispensing spout with spaced apart protrusions
WO2025029212A1 (en) * 2023-07-31 2025-02-06 Noztech Petrol Eki̇pmanlari Teknoloji̇ Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ Fuel nozzle with improved diffuser

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117669A1 (de) * 1981-05-05 1982-11-25 Basf Ag, 6700 Ludwigshafen Zapfhahn mit automatischer abschaltung
GB2204661A (en) * 1987-05-07 1988-11-16 Bryan Donkin Co Ltd Gas pressure cut-off device
DE102008010988B3 (de) * 2008-02-25 2009-07-16 Elaflex Tankstellentechnik Gmbh & Co Zapfpistole

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622782A (en) * 1948-05-25 1952-12-23 Giger Ernst Automatic filling nozzle
US2841191A (en) * 1953-03-30 1958-07-01 Avery Hardoll Ltd Liquid dispensing apparatus
US3101102A (en) * 1961-07-06 1963-08-20 Curtiss Wright Corp Closed pressure system for dispensing fluids
US3101101A (en) * 1961-07-31 1963-08-20 Curtiss Wright Corp System and mechanism for dispensing fluids
US3152623A (en) * 1961-06-09 1964-10-13 Satam Sa Pour Tous App S Mecan Liquid flow control apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622782A (en) * 1948-05-25 1952-12-23 Giger Ernst Automatic filling nozzle
US2841191A (en) * 1953-03-30 1958-07-01 Avery Hardoll Ltd Liquid dispensing apparatus
US3152623A (en) * 1961-06-09 1964-10-13 Satam Sa Pour Tous App S Mecan Liquid flow control apparatus
US3101102A (en) * 1961-07-06 1963-08-20 Curtiss Wright Corp Closed pressure system for dispensing fluids
US3101101A (en) * 1961-07-31 1963-08-20 Curtiss Wright Corp System and mechanism for dispensing fluids

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323560A (en) * 1964-03-26 1967-06-06 Ehlers Karlheinz Liquid-dispensing nozzle
US3332457A (en) * 1964-10-12 1967-07-25 Goodyear Tire & Rubber Discharge spout
US3646974A (en) * 1970-03-23 1972-03-07 Dover Corp Automatic shutoff dispensing nozzle venturi
US4735243A (en) * 1985-08-09 1988-04-05 Karlheinz Ehlers Safety device for a liquid-dispensing nozzle for fuel
US6126047A (en) * 1998-08-06 2000-10-03 Tuthill Corporation Dispensing nozzle
US6997220B1 (en) * 2003-10-24 2006-02-14 Knubox Technologies Fuel dispensing spout with spaced apart protrusions
WO2025029212A1 (en) * 2023-07-31 2025-02-06 Noztech Petrol Eki̇pmanlari Teknoloji̇ Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ Fuel nozzle with improved diffuser

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Publication number Publication date
GB972206A (en) 1964-10-07
CH401725A (de) 1965-10-31
AT245419B (de) 1966-02-25
LU43573A1 (de) 1963-06-17

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