DE2317786A1 - AUTOMATICALLY LOCKING-OFF FILLING GUN - Google Patents

Description

Dover Corporation

277 Park Avenue

New York, N.Y. 10017 d *** »" 2317786

United States of America ,

D / 1179

Automatic shut-off nozzle.

The invention relates to an automatically locking fuel nozzle, wherein a Venturi effect is generated by the flowing medium to create a partial vacuum in a chamber provided with a diaphragm, the diaphragm with a locking device cooperates. If the liquid level in the container to be filled reaches a certain height, the Venturi effect is generated a greater vacuum in the chamber so that the diaphragm moves, as a result of which the locking device is through the membrane moves to close a valve in the housing the nozzle to shut off the flow.

In a known automatically shut-off nozzle, the Venturi effect is achieved by using a valve with a valve guide ring for the shut-off valve generated by cooperating fixed component. The interaction between the stationary component and the valve seat insert produces the desired Venturi effect, reduced however, for a certain pressure the throughput due to the flow resistance caused by the fixed component. If the throughput increases as a result of a larger opening of the shut-off valve, so the flow resistance also increases.

If accordingly the above embodiment for generating the Venturi effect is used to automatically shut off the flow through the nozzle if the liquid level is too high filling container has reached a predetermined height, the dimensions of the hoses and the hollow body of the fuel nozzle must be

309843/0450

to achieve a desired flow through the nozzle .--- ' be interpreted. To compensate for the flow resistance of the stationary component that interacts with the valve seat insert To generate the Venturi effect, the hollow body of the nozzle must and the hoses are made larger than would be required in an embodiment without this fixed component. Therefore, with a fuel nozzle with this component are for automatic Shutting off the flow the components larger than to achieve the same flow through a nozzle without an automatic Shut-off device would be required.

The object of the present invention is to address the disadvantages of the flow resistance in the hollow body of the fuel nozzle and still ensure the Venturi effect required for an automatic shut-off if the liquid level drops has reached a predetermined height in the container to be filled. Through the present invention, the body of the fuel nozzle and the hoses are reduced in size compared to the known Zapijisfcalen with automatic Barrier.

Experiments with a nozzle according to this invention have shown ' that the throughput is much greater compared to that Throughput through pump nozzles of the same design but with the usual one Shut-off device, In the present invention, for example, a reduction in hose diameter from 25 mm to possible to 19 mm without reducing throughput. This is also a reduction in the manufacturing costs for the hollow body the pump gun and the hoses possible.

Furthermore, the weight of the fuel nozzle and that with it connected components for a certain throughput reduced. As a result, the fuel nozzle according to the invention is easier to use. handle than the fuel nozzle with the known shut-off device.

Since lately self-service is becoming more prevalent at petrol stations begins, the nozzle according to this invention is very advantageous because it is lighter and easier to use. The known disadvantage of the heavy weight of the fuel nozzle is

309843/0450

- 3 - ■
substantially reduced by the nozzle according to this invention although it is provided with an automatically acting shut-off device.

The desired Venturi effect is achieved with the new nozzle for automatic shut-off by means of smaller channels and the same throughput generated as with the known fuel nozzles with automatic acting shut-off device and this is achieved by using a second valve, which is by spring force is loaded in the opposite direction to the main shut-off valve. The second valve cooperates with the seat ring around the Generate venturi effect for the automatic shut-off.

By using a second venturi on the second valve wiBä the flow resistance of the second valve is reduced If the throughput increases as a result of the second Venturi effect in a chamber within the second valve, the pressure is reduced. Therefore, in the fuel nozzle according to the present invention no fixed flow resistance is maintained, on the contrary, the flow resistance is reduced if the flow rate increases. Accordingly, a greater throughput is possible for a hose with a certain diameter.

As mentioned above, the nozzle has the hollow body according to this invention a lower weight than the hollow body of the known fuel nozzles with automatic shut-off device. To further reduce the weight of the hollow body of the fuel nozzle becomes a lightweight mount according to the present invention for the locking device in contrast used for the usual storage in the hollow body of the fuel nozzle. This further reduces the weight of the nozzle body, consequently, the fuel nozzle is according to this invention particularly advantageous for self-service.

There is a possibility that you are filling a vehicle tank forget to remove the nozzle from the tank. In this case, when leaving the vehicle substantial damage to the hollow body of the fuel nozzle and the hoses can be caused if the grommet is firmly attached to the hollow body the nozzle is attached.

309843/0450

- »4 -

This is made more satisfactory by the present invention Way avoided in that the nozzle of the nozzle is releasably attached to the hollow body "of the nozzle. Accordingly, the nozzle on the hollow body of the nozzle can be easily replaced if you have forgotten the nozzle from the tank of a departing vehicle to remove. In a fuel nozzle "according to this invention ^ consists no danger for the hollow body of the nozzle or the one with the Hollow body connected hoses in case you forgot the grommet can be removed from the vehicle tank, as the grommet is simple and without Damage to the hollow body of the nozzle is pulled out of this. ;

As self-service at some petrol stations during certain times and during other times the service by a gas station attendant takes place, it is desirable that the gas station attendant does not have to constantly hold the handle of the Zaff pistol while the tank is being filled, but other work while filling the vehicle tank, such as checking the Oe! standee., - can carry out »

The fuel nozzle of this invention meets these requirements. According to this invention, an adjustable rack cooperating with a lever attached to the handle of the nozzle is used to hold the handle of the nozzle in a position in which the main shut-off valve is open without having to hold the handle. In another position, _r acts. the lever does not work with the rack, so that the handle of the nozzle must be held to open the main shut-off valve. This last-mentioned mode of operation is used for self-service.

The shut-off device according to this invention automatically interrupts the flow even if the one hinged to the handle Lever is not in engagement with the rack * That means if if you do not let go of the handle of the nozzle when the tank is full, no overflow can occur due to the automatic action Shut-off device of the nozzle according to the present invention.

Embodiments of the invention will now be described with reference to the drawings, in which:

309843/0460

Figure 1 is a sectional view of the nozzle according to the invention;

FIG. 2 shows a section of the fuel nozzle according to FIG. 1, the second shut-off valve engaging the seat ring.

Figure 3 is a plan view of the receiving sleeve for the second shut-off valve.

FIG. 4 shows a partial illustration in section of a modified spout and a modified hollow body for the fuel nozzle the invention.

FIG. 5 is an end view of the TClIe according to FIG. 4.

Figure 6 is an end view of part of the hollow body in which the spout of Figure 4 is attached.

Figure 7 is a sectional view of another embodiment of the main shut-off valve and the seat ring.

In Figure 1, a nozzle body 10 is shown with an inlet 11, to which a hose is to be attached. The nozzle body also has an outlet 12 at which a Spout 14 is attached to the dispensing of liquid in a container. The spout 14 has a spring 15 for contacting the filler neck of the container or tank to be filled.

The body 10 has a first or main shut-off valve 16 for shutting off the flow through the hollow body 10 from the inlet 11 to the outlet 12. A spring 17 presses the first shut-off valve 16 into its closed position, so that the flow from the inlet 11 to the outlet 12 is interrupted.

The first shut-off valve 16 comprises a sealing washer 18, which made of elastic material such as rubber, a cap 19 and a base 20 made of suitable plastic or metal is made. The sealing washer 18 of the first shut-off valve 16 contacts a first seat surface 21 of a seat ring 22 which is screwed into the body 10 if the first shut-off valve 16 is closed is.

The first shut-off valve 16 can be opened by a pivotably articulated handle 23, whereby a plunger 24, its upper end lies in a bore 25 of the lower part 20, is moved. the

309843/0450

-6- 2317736

Movement upward of the first shut-off valve 16 determines the Throughput through the seat ring 22, since the side surface of the lower part 20 with a specific shape to interact with the Wall of the seat ring 22 is provided. ■

The plunger 24 runs through the hollow body. 10 for cooperation with the handle 23, but is not in contact with the hollow body 10 as a result of a guide sleeve 26 which is arranged around the plunger 24 at the point where it penetrates the hollow body 10. The guide sleeve 26 is made of a suitable plastic such as e.g. acetal resin. This plastic has a relatively low coefficient of friction around the friction between the plunger 24 and to keep the body 10 as small as possible. The guide sleeve also reduces wear on the plunger 24 so as not to impair its ability to move.

The liquid cannot get into the open air from the hollow body 10 through the bore for the plunger 24 there above the guide sleeve 24 a packing 27 is arranged around the plunger 24. A cap 28 is arranged above the packing 27 and a spring 29 acts against this cap. A receiving sleeve 30 is screwed into the hollow body 10 and serves as an abutment for the spring 29 and holds the packing 27 in position to prevent the flow from leaking out of the hollow body 10 along the plunger 24 to avoid.

The receiving sleeve 30 serves to support the lower end of a second shut-off valve 3I ₀ . The second shut-off valve 31 and the receiving sleeve 30 form a chamber 32 which is connected to the interior of the hollow body via channels 33 in the second shut-off valve 31. .

A spring 34 is arranged in the chamber 32 and presses the two, te shut-off valve 31 in contact with the lower surface of the lower part 20 of the first shut-off valve 16. The plunger 24 protrudes the second shut-off valve 31 and this shut-off valve 31 can be axially displaced on the plunger 24.

If the first shut-off valve 16 is moved upwards by a pivoting movement of the handle 23, the second shut-off valve follows

30984-3 / 0450-

- 7 31 of the movement of the first shut-off valve 16 to a surface 35 of the second shut-off valve 31 touches a second seat surface 36 of the seat ring 22. This touch the surface 35 of the second The shut-off valve 31 with the second seat surface 36 of the seat ring 22 is shown in FIG.

If the flow of liquid through the seat ring 22 as a result of the Upward movement of the first shut-off valve 16 against the spring 1? begins, the fluid pressure moves the second shut-off valve 31 downwards, so that the surface 35 of the second shut-off valve 31 is no longer in contact with the second seat surface 36 of the seat ring 22 is. As a result, the liquid flows through the hollow body Io to the outlet 12 and then through the spout 14 into the container to be filled.

As a result of the flow through the body 10 and the bores 33 in the second shut-off valve 31, which the chamber 32 with the inner of the hollow body 10 will connect a Venturi effect through the over the lower edge of the surface 35 of the second shut-off valve 31 flowing Liquid is created to create a vacuum in chamber 32. In this way, the entire pressure acting upward on the second shut-off valve 31 is reduced, so that this second shut-off valve 31 is even further removed from the second seat surface 36 of the seat ring 22 by a certain fluid pressure to achieve greater flow through the hollow body 10.

The upper end of the guide sleeve 30 has four projections 37 (see Figure 3) for cooperation with a lower annular surface 38 of the second shut-off valve 31 to limit its downward movement. In this way, the bores 33 are always in communication with the inner of the hollow body 10 and even if the second shut-off valve 31 is in its lowest position for a maximum flow between the seat ring 22 and the second shut-off valve 31.

The grommet 14 is detachably attached to the body Io and has on its upper End projections 39 for cooperation with a sealing ring 40, which is preferably made of rubber. The sealing ring 40 is arranged between a locking ring 41 and a retaining ring 42, which preferably consists of a suitable plastic or metal and is screwed into the outlet 12 of the hollow body 10.

309843/0450

The locking ring 41 has a slot in the end of the Spout 14 protruding area 43 by one rotational movement of the spout 14 in relation to the body 10.

If a vehicle with the nozzle protruding into the container moves away, so the protrusions 39 of the grommet 14 from the sealing ring 40 pulled out without the hollow body 10, the pump to which the body 10 is attached by a hose, or the hose itself: becomes damaged. To replace the grommet 14 on the hollow body 10, only the retaining ring 42 needs to be removed and then the end of the grommet 14 is to be reinserted with the projections 39 into the sealing ring 40,

When pulling out of the spout 14 is also a vacuum tube 45 which is fixed to the spout 14 and attached in the grommet 14 at one end to an opening 44 released from an angle pipe that is attached in the body 10 _o The vacuum tube 44 is constituted by a Sleeve 47, which is preferably made of rubber, connected to the angled pipe 46 »

The vacuum tube 45 and the elbow tube 46 form a channel that of the container to be filled leads to a chamber 48 formed between a cap 49 and a membrane 50, the chamber 48 is also via a bore 51, an annular chamber 52 and four bores 53 (only two visible in FIG. 1) in the seat ring 22 connected to the inside of the seat ring 22 »

If there is a flow from the inlet 11 to the outlet 12, a Venturi effect is generated in the channels 53 of the seat ring 22. As long as the liquid level in the tank to be filled does not close the opening 44, air is sucked through the vacuum tube 45 by the Venturi effect generated as a result of the liquid flow between the seat ring 22 and the second shut-off valve 31. As soon as the opening 44 is closed, however, the pressure in the chamber 48 decreases, since the air is sucked out of this chamber through the bores 53 in the seat ring 22 as a result of the venturi effect. This venturi effect is described more fully in U _S S. Patent 2,582,195.

The membrane 50 and the cap 49 are attached to the body 10 by screws

30984 3/04 SO. \ -

55 attached. Thus, the membrane 50 is between the body 10 and the cap 49 is arranged to form the chamber 48.

A locking plunger 56 is attached to the membrane 50 and lies between three balls 57 (only two are shown), which lie in openings of a locking plunger 58. If the locking plunger 56 is in the position according to Figure 1, the balls 57 prevent a downward movement of the plunger 58, which can be moved in an insert 59. The insert 59 is preferably made of plastic and is attached to the hollow body 10.

If the container is full and the membrane 50 moves upwards, the locking plunger 56 is also raised. The upward movement of this plunger 56 causes a tapering area of the plunger 56 to pass between the balls 57 they move inwards and thus the plunger 58 can be adjusted downward against the force of the spring 60. the Cooperation between the tapered area of the plunger 56 and the locking plunger. 58 is more fully detailed in U.S. Patent 2,582,195.

The lower end of the plunger 58 is attached to a lower lever 61 by means of a pin 62. The pin 62, which is on the plunger 58 passes through slots (one of which is indicated by reference numeral 63) in bifurcated parts (one is indicated by the reference number 64) of the lower lever 61 by a pin-and-slot connection between the plunger 68 and the Lever 61 to form. Thus, the lower lever 61 can pivot or slide relative to the locking link 58.

The forked parts of the lower lever 61 are near the Plunger 24 further away from each other. The forked parts are connected to one another via a floor 65 which is below of the plunger 24 is located. The plunger 24 touches the bottom 65 at the point of the more widely spaced areas of the forked Parts of the lower lever 61. The upper surface of the bottom 65 is used to contact the lower end of the plunger 24, which with a Plastic (not shown) to touch the top surface

309843/0450

-lO- of the bottom 65 is provided to during a sliding movement of the Plunger 64 on the lower lever 61 to reduce friction.

The lower lever 61 is pivotable by a rivet 66 on the handle 23 hinged. The handle 23 comprises a handle part 67 with two forked arms (one is indicated by the reference number 68), which extend from the opposite sides of the handle part 67. The ends of the forked arms of the handle 23 are with each other connected and only the end of one arm can touch the upper surface of the bottom 65 of the lower lever 61. The forked ones Arms of the handle 23 are provided with rollers 69 and 70 ». for cooperation with the lower end of the plunger 24, so that it is always in its vertical position, regardless of the movements of the Handle 23, can remain. .

If the handle 23 is raised from the position shown in FIG. 1, so the lower lever 61 is moved along by the rivet 66 as a result of its pivotable articulation. If the handle 23 moves up touches the end of one of the forked arms of the handle 23 the upper surface of the bottom 65 of the lower lever 61. Accordingly the handle 23 and the lower lever 61 act as a single component and jointly pivot about the axis of pin 62. The locking plunger 58 is now through the position of the locking plunger 56 locked in relation to the balls 57.

When the handle 23 moves upwards, the base 65 contacts of the lower lever 61 moves the valve stem 24 upwards against the force of the spring to open the first shut-off valve 16 to move. As a result, the liquid flows from the inlet 11 to the outlet 12 of the hollow body 10 with the liquid pressure the second shut-off valve 31 away from the second seat surface 36 ~.

The handle 23 can by a clamping lever 71 in three positions for three different throughputs can be set. The tension lever 71 is pivotable by the rivet 66 on the lower lever 61 and hinged to the handle 63. The cocking lever 71 has two bifurcated lugs (one indicated by 72) on opposite sides of the forked parts of the lower lever 61. The forked lugs of the

3 0 9 8 4 3/0450

Clamping levers 71 are interconnected by a central area 73 tied together.

The tension lever 71 is counterclockwise by a spring 74 loaded about the axis of the rivet 66. The spring 74 is arranged on the rivet 66 between the forked arms of the handle 23 and acts on the central connecting area 73 of the tensioning lever 71. The counterclockwise movement of the cocking lever 71 by the Spring 74 is limited by the contact of the central connecting part 73 with a shoulder pointing downward from the handle 23

If the handle 23 is in a position to hold the shut-off valve open 16 wants to lock, the central connecting area 73 of the clamping lever 71 is in contact with one of the grooves or steps of the rack 75 are set. The rack 75 is adjustable on a protective bracket 76 by means of a screw 77 Nut 78 is attached, and the guard is in turn on the body exder Nozzle attached.

If you do not hold the handle 23 to dispense liquid wants, so that the liquid flows out until it is automatically shut off, the toothed rack 75 is adjusted, as in FIG. 1 is indicated. A person skilled in the art will use the nozzle in this manner.

If you hold the handle 23 for dispensing liquid permanently wants, the rack 75 is pushed forward after loosening the nut 78 so that the clamping lever 71 does not come into contact with the steps of the rack 75 can arrive. For self-service, the nozzle is to be handled in this way and To dispense liquid by means of the dispensing nozzle, the handle 23 must be held firmly.

If the rack 75 is set as indicated in FIG. 1 and the clamping lever 71 is in contact with a step or a groove the rack, the clamping lever 71 holds the handle 23 in the desired position until the container is filled. If the fluid level has reached the desired height in the container, the liquid in the container closes the opening 44 of the

309843/0450

- 12 -. ■. ■

Grommet 14 removes the locking plunger 58 from the balls is released because the membrane 50 as a result of the now decreasing Pressure in the chamber 48 moves up ",

After the plunger .58 is exposed, the spring 17 closes the first shut-off valve 16 by rotating the lower lever 61 counterclockwise around the rivet 66 and thereby the plunger 58 pulled down.,

Since the handle 63 by the set in the rack 75 Clamping lever 78 is held against movement, the lower lever 61 counterclockwise around the rivet 66 during the downward movement of the plunger 24. If the pressure load of the The tensioning lever 71 subsides and the friction between the tensioning lever 71 and the groove or the step of the rack 75 no longer occurs is high enough, the spring 74 pivots the tensioning lever 71 in the Counterclockwise until the middle connection area 73 of the The clamping lever touches the attachment 75 of the gitffes 23 «,

In case the end of the cocking lever is from the groove or other step of the rack 70 is released, the handle 23 falls down, as a result of which the spring 60 moves the plunger 58 back into position According to FIG. 1. As a result, the lever 61 below also returns to the position according to FIG. 1, in which the bottom 65 is the end of one of the forked arms of the handle 23 touched

If the spout 14 is removed from the filled container, the opening 44 is open again. As a result, the pressure in the Chamber 48 closed, so that the acting on the upper side of the membrane 50 Spring 79 can push the membrane 50 downwards to the Locking plunger 56 to be moved back into the position according to FIG. 1, in which the plunger 58 is locked against downward movement.

Even if the handle 23 is held firmly during filling instead of using the tension lever 71, the device is according to the invention effective to the flow through the nozzle interrupt when the tank is full. This is due to the fact that the lower lever 61 rotates counterclockwise around the rivet 66 rotates when the locking plunger 58 is no longer through the

309843 / 04S0

Balls 57 is held. Therefore, the spring 17 now also moves the plunger 24 downwards against the lower lever 61 and causes a counterclockwise rotation of the same around the Axis of rivet 66.

For dispensing liquid by means of a pump nozzle according to the present invention, the handle 23 is raised and thereby the first shut-off valve 16 is moved upwards, so that the sealing washer 18 is no longer on the first sealing surface 21 of the seat ring 22 is present. Since the upper end of the second shut-off valve 31 is pressed against the lower surface of the lower part 20 by the spring 34 of the first shut-off valve 16 is pressed, the second moves Valve 31 with the first shut-off valve 16 upwards until the surface 35 of the second shut-off valve 31 is the second seat surface 36 of the seat ring 22 as shown in FIG.

As soon as the sealing washer 18 of the first shut-off valve 16 of the first seat surface 21 of the seat ring 22 comes free so that the liquid flow can begin, the liquid pressure pushes the second shut-off valve 31 downwards against the spring 32, so that the surface 35 is no longer with the second seat surface 36 of the Seat ring 22 is in contact.

By the flow between the inner wall of the seat ring 22 and the second shut-off valve 31 is a Venturi effect in the bores 53 generated. The liquid flow over the lower edge of the surface 35 of the second shut-off valve 31 is a second Venturi effect caused in the bores 33. As a result, a vacuum is created in the chamber 32 and the vacuum on the second shut-off valve 31 forces acting upwards are reduced as a result a greater throughput is possible through the nozzle.

If you release the handle or if the tank is full the membrane 50 moves upwards, so that the lower lever 61 no longer holds the lower end of the plunger 24 and the spring 17 (The first shut-off valve 16 closes. This interrupts the flow through the nozzle.

When the flow through the nozzle is interrupted, the second shut-off valve 31 returns to the position according to FIG.

309843/0450

in which there is the lower surface of the lower part 20 of the first Stop valve 16 touches »In this position there is no liquid between the first stop valve 16 and the second stop valve 31 enclosed so that all of the liquid can flow out of the hollow body 10 into the filled container.

Although, as described above, the grommet 14 is detachable on the body 10 of the Fuel nozzle is attached so that when it occurs, a certain Force can be pulled out of the opening 12, the nozzle according to this invention can of course also with a nozzle which cannot be detached from the hollow body 10 by glue when a certain load occurs, - in FIGS. 4 and 5 a hollow body 80 of a fuel nozzle is shown, which with Exception of the section shown in Figure 4: it is the hollow body Io corresponds to the described embodiment «,

The hollow body 80 of the fuel nozzle has an outlet 81 in which a grommet 82 is attached / the grommet 82 is through a threaded ring 83, which is preferably made of aluminum, detachable at the outlet

81 of the hollow body 80 attached.

The spout 82 has a groove 84 in its outer surface and in the vicinity of the end _β lying inside the hollow body 80. A locking disc 85 protrudes into the groove 84,

The locking disc 65 is in a certain position the spout 82 and is for this purpose provided with a projection 86 which protrudes into a slot 87 in the spout 82, which is in connection with the groove 84. Accordingly, the locking disc 85 is in a certain position on the spout

82 recorded.

The locking disc 85 rests on a shoulder 88 of the hollow body 80 to limit a movement of the spout 82 into the hollow body 80. The annular shoulder 88 has a predetermined one Place a semicircular opening 89 (see Figure 6) for receiving an approach 90 (see Figures 4 and 5) of the Locking disc 85, if the grommet 82 is inserted and the locking disc 85 on the annular shoulder 88 of the Hollow body 80 is applied. Through the interaction of the approach

309843/0450

the locking disc 85 and the opening 89. in the annular Shoulder 88 of the hollow body 80, the spout 82 is held in a certain position and a rotary movement thereof avoided.

The grommet 82 has a seal 91, which is preferably made of rubber, surrounds the grommet and rests against the locking ring 85. If the threaded sleeve 83 is in the opening 01 of the hollow body 80 is screwed to hold the grommet 82 in the hollow body 80, the seal 90 between the disc 85 and the sleeve 83 compressed, as can be seen from FIG.

The spout 82 has a vacuum tube 92 which is fastened in the same way is than the vacuum tube 45 in the grommet 14. The vacuum tube 92 is through a sleeve 93, which is preferably made of rubber, connected to an angled tube 60 which is fastened in the hollow body 80 in the same way as in the hollow body 10.

This releasable fastening of the grommet 82 on the body 80 allows the grommet 82 to be replaced quickly. Only the threaded sleeve is required for this 83 to be released and the grommet 82 to be pulled out of the hollow body 80. As a result, the sleeve 93 comes off the angled tube 46 free. Another grommet 82 with a vacuum tube 92 and a sleeve 93 can then be pushed into the hollow body 80 will.

As shown in Figure 7, the Sitrzing 22 can be on his be provided with a sloping wall 22 * on the upper side. If there the first shut-off valve 16 is closed, a throttling occurs between the cap 19 of the first valve 16 and the wall 22 ' of the seat ring 22. This allows in addition to the interaction between the lower part 20 and the seat ring 22 a further influence on the throughput through the seat ring 22.

The main advantage of this invention is that for a certain throughput a reduction in the weight of the fuel nozzle is possible. According to a further advantage, the fuel nozzle is cheaper for a certain throughput because of the costs for the hollow body of the nozzle and the hoses are lower.

309843/0450

Claims (8)

P A T E N T A N S P R U E C H E. I IJ fuel nozzle with a hollow body having an inlet and an outlet, a first valve seat, a first valve for cooperation with the first valve seat to interrupt the flow from the inlet to the outlet if the first valve is in contact with the first valve seat and one Actuating device for the first valve in order to move it away from the first valve seat, characterized in that a. second valve seat is arranged between the first valve seat and the outlet, that a second valve cooperates with the second valve seat to generate a Venturi effect if the first valve is moved away from the first valve seat by the actuating device, that the second valve is provided with a spring is to move it towards the second valve seat, and that means are provided for reducing the effectiveness of the spring to move the second valve if the liquid flow moves the second valve away from the second valve seat. 2. nozzle according to claim 1, characterized in that one Receiving sleeve are provided for slidably holding the second valve, and this receiving sleeve with the second valve together form a chamber, and that the means for reducing the influence of the spring to move the second valve in the second valve comprises formed channels to connect the chamber with the flow through the hollow body, whereby at a Liquid flow through the hollow body creates a lower pressure in the chamber, 3. Dispensing nozzle according to claim 2, characterized in that the spring for moving the second valve are arranged within the chamber. > _x 4. dispensing nozzle according to claim 3, characterized in that a spring is provided around the first valve in contact with the first valve seat to shut off the flow between the inlet and the outlet to push and that this spring in the direction of the Flow from inlet to outlet acts * 309843/0450 5. nozzle according to claim 4, characterized in that the The spring acting on the second valve acts against the spring of the first valve. 6. fuel nozzle according to claim 3, characterized in that the Betä'tigungsvorrichtung comprises a plunger which through the Receiving sleeve for the displaceable mounting of the second valve, the chamber and the second valve protruding, and that the plunger is connected to the first valve. 7. nozzle according to claim 3, characterized in that the first valve seat and the second valve seat on a single valve seat insert are trained. 8. nozzle according to claim 1, characterized in that the first valve a lower part, a sealing ring, and one above comprises the sealing ring arranged cap, and that a valve seat ring with a first and a second wall in the hollow body is attached and is provided between the two walls with the first valve seat, the first wall of this valve seat ring perpendicular and the second wall is inclined, the Untertal with an inclined peripheral wall to interact with the first perpendicular Wall of the valve seat ring is provided and wherein the Cap is provided with a vertical peripheral wall for cooperation with the second inclined wall of the valve seat ring. . Fuel nozzle according to one of claims 1 to ßi, with a nozzle for dispensing liquid, characterized in that the nozzle is releasably attached to the body of the nozzle and that means are provided which cooperate with one end of the nozzle to rotate this nozzle in relation to to avoid the hollow body of the nozzle. / {&. JcI. Dispensing nozzle according to claim / 5, characterized in that a locking ring is provided which holds the spout against rotational movements in relation to the hollow body and that ribs protruding into a packing are formed at the end of the spout. β ■ ■. . Dispensing nozzle according to claim ) &, characterized in that a locking ring is arranged in a groove of the grommet and lugs 309843/0450 the locking ring in a hole in the grommet and a recess of the hollow body protrude. 309843/0450 Blank page