CA1036559A - Vapor recovery nozzle - Google Patents
Vapor recovery nozzleInfo
- Publication number
- CA1036559A CA1036559A CA228,519A CA228519A CA1036559A CA 1036559 A CA1036559 A CA 1036559A CA 228519 A CA228519 A CA 228519A CA 1036559 A CA1036559 A CA 1036559A
- Authority
- CA
- Canada
- Prior art keywords
- nozzle
- piston
- valve
- seal
- spout
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
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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
-
- 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
- B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Mechanically-Actuated Valves (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
VAPOR RECOVERY NOZZLE
Abstract of the Disclosure. A vapor recovery nozzle for dispensing fuel, such as gasoline, that can be latched to the filler neck of a tank to be filled. An articulated seal is provided that sealingly engages the filler neck and, when so engaged, forces a piston relatively toward the nozzle to open the flow passageway through the nozzle for the vapors. A valve is provided that is actuated by the piston which, when the nozzle is not in the filler neck, closes to prevent the escape of any vapors that might be contained in the vapor recovery system. Furthermore, the piston carries a valve operating means that functions in conjunction with a flow valve that is located in a conduit ex-tending through the nozzle. This conduit is utilized to sense when the liquid level in the tank rises above the end of the conduit extending from the nozzle to automatically shut off the nozzle and prevent flow of fuel therefrom. The arrangement of the nozzle is such that the vapor recovery passageway extending therethrough is sealed to prevent the entrance of air or other vapor into the system except as may come from the fuel tank.
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Abstract of the Disclosure. A vapor recovery nozzle for dispensing fuel, such as gasoline, that can be latched to the filler neck of a tank to be filled. An articulated seal is provided that sealingly engages the filler neck and, when so engaged, forces a piston relatively toward the nozzle to open the flow passageway through the nozzle for the vapors. A valve is provided that is actuated by the piston which, when the nozzle is not in the filler neck, closes to prevent the escape of any vapors that might be contained in the vapor recovery system. Furthermore, the piston carries a valve operating means that functions in conjunction with a flow valve that is located in a conduit ex-tending through the nozzle. This conduit is utilized to sense when the liquid level in the tank rises above the end of the conduit extending from the nozzle to automatically shut off the nozzle and prevent flow of fuel therefrom. The arrangement of the nozzle is such that the vapor recovery passageway extending therethrough is sealed to prevent the entrance of air or other vapor into the system except as may come from the fuel tank.
-1a-
Description
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Background of the Invention. This invention relates generally to improved gasoline dispensing nozzles. More par-ticularly, but not by way of limitation, this invention relates to an improved vapor recovery nozzle of the automatic shutoff type.
Due to the volatility of fuels, such as gasoline, con-siderable vapors are generated during the filling of fuel tanks and the like. ~or the most part, and particularly with respect to the filling of automotive fuel tanks, such vapors have been permitted to escape into the atmosphere. As the vapors escape from the tank, they mix with air and upon reaching a specified concentration can ;
form an extremely explosive mixture. The escape of such vapors has become of great concern, not only because of the sa~ety haæard, but more recently because of the concern about p~ution o~ the atmosphere. ;
It has been proposed to prevent the escape of such vapors into the atmosphere by a use of a nozzle that forms a seal with the filler neck of the fuel tank and has appropriate passageways provided therein for extracting the vapors from the tank as they are generated. U. S. Patent No. 3,521,679 issued to E. L. Copony on July 28, 1970 describes one such dispensing nozzle. Another dispensing nozzle that has provisions for the removal of such ;
vapors is described in U. S. Patent No. 3,823,752 issued to Donald A. Lasater et al on July 16, 1974. Both of the above nozzles appear to provide apparatus adequate for the recovery of such vapors. However, it is noted that in most instances, the nozzles must be held, manually, in the filler neck during the filling operation and neither provide any means for preventing the escape of vapors from the vapor recovery system once the delivery has , stopped.
A further problem with prior art nozzles is that an effective seal with the tan~ has not been attained. The difficulty of forming an effective, gas-tight seal results primarily from "
....
la3~sss the wide variety of sizes and configurations of filler necks as well as from the cosmetic treatment given the refueling area of vehicles by the vehicle manufacturers.
It is an object of this invention to provide an improved vapor recovery nozzle of the automatic shu~off type.
It is another object of this invention to provide an improved vapor recovery nozzle that is positively retained in the ~iller neck during operation.
A further ob~ect of the invention is to provide an improved vapor recovery nozzle that includes a sealed vapor passage-way from the tank to the vapor recovery system.
Summary of the Invenkion. This invention provides an improved gasoline dispenslng nozzle of the automat~c shuto~ type for use in connection with vapor recovery systems. The nozY,:le lncludes a body contalnlng a ~low control valve, lnduction means for causing gas flow through the nozzle, a trlgger for activating the flow control valve and pressure responsive latch means operable in con~unction with the induction means to release the flow con-trol valve regardless of the trigger position. The nozzle also includes an elongate hollow spout, a conduit extending sub-stantially through the interior of the spout for connection with the induction means and valve means for opening and closing the conduit. A hollow member for connecting the spout in fluid com-munication with the body has an enlarged portion forming a portion of a vapor passageway with the spout and has a port extending therethrough providing fluid communication between the vapor passageway and the vapor recovery system. A hollow piston loosely encircles the spout and forms a portion of the vapor ;
passageway therewith. The piston has a first end portion "
slidingly and sealingly received in the hollow member and has a ~ `
second end portion. An articulated seal assembly is located on and movable with the second end o~ the piston in sealing
~Q36~
Background of the Invention. This invention relates generally to improved gasoline dispensing nozzles. More par-ticularly, but not by way of limitation, this invention relates to an improved vapor recovery nozzle of the automatic shutoff type.
Due to the volatility of fuels, such as gasoline, con-siderable vapors are generated during the filling of fuel tanks and the like. ~or the most part, and particularly with respect to the filling of automotive fuel tanks, such vapors have been permitted to escape into the atmosphere. As the vapors escape from the tank, they mix with air and upon reaching a specified concentration can ;
form an extremely explosive mixture. The escape of such vapors has become of great concern, not only because of the sa~ety haæard, but more recently because of the concern about p~ution o~ the atmosphere. ;
It has been proposed to prevent the escape of such vapors into the atmosphere by a use of a nozzle that forms a seal with the filler neck of the fuel tank and has appropriate passageways provided therein for extracting the vapors from the tank as they are generated. U. S. Patent No. 3,521,679 issued to E. L. Copony on July 28, 1970 describes one such dispensing nozzle. Another dispensing nozzle that has provisions for the removal of such ;
vapors is described in U. S. Patent No. 3,823,752 issued to Donald A. Lasater et al on July 16, 1974. Both of the above nozzles appear to provide apparatus adequate for the recovery of such vapors. However, it is noted that in most instances, the nozzles must be held, manually, in the filler neck during the filling operation and neither provide any means for preventing the escape of vapors from the vapor recovery system once the delivery has , stopped.
A further problem with prior art nozzles is that an effective seal with the tan~ has not been attained. The difficulty of forming an effective, gas-tight seal results primarily from "
....
la3~sss the wide variety of sizes and configurations of filler necks as well as from the cosmetic treatment given the refueling area of vehicles by the vehicle manufacturers.
It is an object of this invention to provide an improved vapor recovery nozzle of the automatic shu~off type.
It is another object of this invention to provide an improved vapor recovery nozzle that is positively retained in the ~iller neck during operation.
A further ob~ect of the invention is to provide an improved vapor recovery nozzle that includes a sealed vapor passage-way from the tank to the vapor recovery system.
Summary of the Invenkion. This invention provides an improved gasoline dispenslng nozzle of the automat~c shuto~ type for use in connection with vapor recovery systems. The nozY,:le lncludes a body contalnlng a ~low control valve, lnduction means for causing gas flow through the nozzle, a trlgger for activating the flow control valve and pressure responsive latch means operable in con~unction with the induction means to release the flow con-trol valve regardless of the trigger position. The nozzle also includes an elongate hollow spout, a conduit extending sub-stantially through the interior of the spout for connection with the induction means and valve means for opening and closing the conduit. A hollow member for connecting the spout in fluid com-munication with the body has an enlarged portion forming a portion of a vapor passageway with the spout and has a port extending therethrough providing fluid communication between the vapor passageway and the vapor recovery system. A hollow piston loosely encircles the spout and forms a portion of the vapor ;
passageway therewith. The piston has a first end portion "
slidingly and sealingly received in the hollow member and has a ~ `
second end portion. An articulated seal assembly is located on and movable with the second end o~ the piston in sealing
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relationship therewith. The articulated seal assembly forms an-other portion of the vapor passageway and has a seal member thereon : :
arranged to sealingly engage the projecting surface on the fuel tank whereby the vapor passageway provides communication between the tank and the vapor recovery system. The piston also carries valve operating means that operates the valve to open the conduit ;
when the piston is moved into the hollow member permitting operation o~ the nozzle.
Brief Description of the Drawing. Figures lA and lB
taken together comprise a vertical cross-sectional view of a nozzle constructed in accordance with the invention.
Figure 2 is a view partially in elevation and partlally cross section taken generally along the line 2-2 o~ ~igure lA.
Figure 3 is a partial cross-sectlonal view of' the nozæle o~ Figures lA and lB, but showlng th0 varlous components thereo~
in another operating position.
Detailed Descrlption of the Preferred Embodiment. Re-~erring to the drawing and to Figures lA, lB and 2 ln particular, shown therein and generally designated by the re~erence character 10 is a vapor recovery nozzle constructed in accordance with the invention. The nozzle 10 includes a nozzle body assembly 12, a spout assembly 14, and a handle assembly 16.
The nozzle body assembly 12 has been fully described in U. S. Patent No. 3,638,689 issued to Hans Eric Ecklund on Febru-ary 1, 1972. For this reason, the body assembly 12 ~ill not be descrlbed in great detail but only to the extent necessary to the understanding o~ the vapor recovery aspects o~ the nozzle 10. `
The nozzle body assembly 12 is hollow and includes a ;~
spring loaded main valve assembly 17 disposed in a ~low passageway through the valve. The main valve assembly 17 is normally close~
and is moved to the open positlon by pulllng upwardly on a trigger 18 which displaces a valve actuating mechanism 20 rearwardly
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relationship therewith. The articulated seal assembly forms an-other portion of the vapor passageway and has a seal member thereon : :
arranged to sealingly engage the projecting surface on the fuel tank whereby the vapor passageway provides communication between the tank and the vapor recovery system. The piston also carries valve operating means that operates the valve to open the conduit ;
when the piston is moved into the hollow member permitting operation o~ the nozzle.
Brief Description of the Drawing. Figures lA and lB
taken together comprise a vertical cross-sectional view of a nozzle constructed in accordance with the invention.
Figure 2 is a view partially in elevation and partlally cross section taken generally along the line 2-2 o~ ~igure lA.
Figure 3 is a partial cross-sectlonal view of' the nozæle o~ Figures lA and lB, but showlng th0 varlous components thereo~
in another operating position.
Detailed Descrlption of the Preferred Embodiment. Re-~erring to the drawing and to Figures lA, lB and 2 ln particular, shown therein and generally designated by the re~erence character 10 is a vapor recovery nozzle constructed in accordance with the invention. The nozzle 10 includes a nozzle body assembly 12, a spout assembly 14, and a handle assembly 16.
The nozzle body assembly 12 has been fully described in U. S. Patent No. 3,638,689 issued to Hans Eric Ecklund on Febru-ary 1, 1972. For this reason, the body assembly 12 ~ill not be descrlbed in great detail but only to the extent necessary to the understanding o~ the vapor recovery aspects o~ the nozzle 10. `
The nozzle body assembly 12 is hollow and includes a ;~
spring loaded main valve assembly 17 disposed in a ~low passageway through the valve. The main valve assembly 17 is normally close~
and is moved to the open positlon by pulllng upwardly on a trigger 18 which displaces a valve actuating mechanism 20 rearwardly
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forcing the main valve assembly 17 off its seat.
As can be seen more clearly in Figure 2, the actuating mechanism 20 includes a diaphragm controlled latch 22. A dia- -phragm 24 of the latch 22 is displaced inwardly of the nozzle body assembly 12 by a spring 26. With the latch 22 in this position, movement of the trigger 18 displaces the main valve 16 off its seat.
However, an ~nduction system that includes a conduit 28 located in spout 30, a passageway 32 ~ormed ln the body assembly 12, and a passageway 34 that extends from the diaphragm 24 to the throat of the valve seat in main valve assembly 16. `~
Briefly, and so long as the induction system is unob-structed, gasoline flowing through the nozzle body assembly 12 in-duces ga~ to flow through the conduit 28, the passageway 32 and the passageway 34 so that there is no net pressure e~ect on the d:la-phragm 24. However, upon ob~truct:Lon of the conduik 2~, a nega- ;
tive pressure is created on the diaphragm 24 displacing the latch 22 out of the valve actuating mechanism 20 and releasing the main valve 16 so that it can reseat shutting off flow through the nozzle 10.
20 ` In addition to the conduit 28 and the spout 30, the spout assembly 14 also includes a hollow member 36 having a relatively `
small end 38 that is screwed into the nozzle body assembly 12 and a relatively large end portion 40 that is sized to slidingly receive a piston 42. It will be noted that the interior o~ the hollow `; ;
member 36 is threaded to receive one end of the spout 30 and to ~`~
retain the spout 30 in concentricity with the large end portion 40 thereof.
A port 44 extends through the side wall of the hollow member 36 providing fluid communication between the interior `
thereo~ and a vapor recovery conduit 46 that ~orms a portion o~
the handle assembly 16. ;
As previously mentioned, the conduit 28 ~orms a portion ':" ~`.
:. ~
,`' ~ ' ;5~9 of the induction system and~ as can be clearly seen in ~igure lA, :
the upper end of the conduit 28 is connected with a portion of the nozzle body 12. It will be noted in ~igure lB that the end of the ::
conduit 28 extends through the side wall of the spout 30 near the -discharge end of the spout 30 for purposes which will be described hereinafter. Intermediate the ends of the conduit 28, the conduit is provided with an annular valve seat 48 that is arranged to seal-in~ly en~a~e one end o~ a valve member 50 that is movably located in the conduit 28.
The valve member 50 is movable toward and away from the :~
seat 48 to open and close the conduit 28. The valve member 50 may be constructed from, or at least lncludes, a ferromagnetic portion having North and South magnetic poles located as shown in Figure lB.
The piston 42 is hollow and enc~rcles the spout 30. The interlor of a small end 52 on the piston ll2 ls provl~ed w:Lth key~
ways to receive ~eys 54 mounted on the exter:Lor Or the spout 30 to retain the piston 42 in a predetermined alignment with the spout 30. The piston 42 fits within the large end portion 40 of the hollow member 36 and is slideable therein. To prevent the escape .
of vapors from within the hollow member 36 and the piston 42, the `
piston 42 carries a seal 56 that slidingly and sealingly engages the interior of the hollow member 36.
The end of the piston 42 carrying the seal 56 has an enlarged bore 58 to permit the flow of vapors between the spout 30 .
and the piston 42. On the same end of the piston 42, there is located an annular seal 60 that, in its closed position, abuts a vapor passageway valve member 62 that is mounted on the spout 30.
The purpose o~ the vapor passageway valve which includes the seal 60 and the valve member 62 is to prevent the escape of vapors out-wardly from the nozzle 10 when the valve member 62 i8 in sealing engagement with the seal 60.
A compression spring 63 is located within the hollow r~ - \
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member 36 and engages the piston 42 to bias the piston 42 rela-tively outwardly of the hollow member 36. The engagement between the valve member 62 and seal 60 also functions to limit the out-ward movement of the piston 42 in the hollow member 36.
The piston 42 is also provided with a ferromagnetic mem-ber 64 located adjacent the bore 58 thereof. The ferromagnetic member 64 is disposed in ~uxtaposition with the valve member 50 located in the conduit 28. It will be noted, however, that the North and South magnetic poles of the member 64 are oppositely ori-ented with respect to those in the valve member 50. The purpose of .
the keyways in the piston 42 and the keys 5ll on the conduit 28 is to retain the ferromagnetic member 6l~ ad~acent the valve member 50.
With the poles oriented as shown, it will be appreciated that the ~.
repelling force developed by adJacent, llke poles shown ln :~:L~l:re lB will cause the valve member 50 to sealingly enga~e the seat l~8 in the conduit 28, thereby preventing the flow of fluid therethrough. :
An articulated seal member 66 is movably connected to the small end 52 of the piston 42 by a pin 68. A seal 70 located in the small end of the seal member 66 forms a flexible, vapor- ~.
20 tight seal with the exterior of the small end 52 of the piston 42.
A large seal 72 located on the opposite end ofthe seal member 66 is provided to sealingly engage a surface 74 located on a filler neck 76 of the fuel tank as shown in ~igure 3. As illustrated, a garter spring 77 located within the seal 70 aids in maintaining the fl.uid-tight sealing relationship between the seal 70 and piston 42.
A stop screw 78 or other similar abutment member is mounted on the spout 30. The stop screw 78, as can be seen in ~igure 3, is provided to engage an inner surface 80 on the filler neck 76 to securely retain the nozzle 10 in the filler neck 76.
In addition to the conduit 46, the handle assembly 16 includes a guard 82 that is arranged to protect the trigger . ~ :
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mechanism 18 and also carry a second conduit 84 that is in fluid communication with the conduit 46 and thus with the vapor recovery passageway that extends through the nozzle 10. The opposite end of the conduit 84 will be connected with a vapor recovery system (not shown) that is provided to remove the vapors being generated during the filling of the tank with fuel.
OPeration of the Preferred Embodiment. In operation, the nozzle 10 is connected via the threads at one end of the nozzle body 12 to a fuel supply (not shown) and the conduit 84 will be connected into a vapor recovery system (not shown). The fuel sup-ply will be provided with a pump (not shown) that will deliver liquid fuel to the nozzle 10 under pressure. ;
The nozzle 10 is removed ~rom the fuel d:Lspenser and the spout 30 ~nserted in the ~iller neck 76 o:~ a tank to be ~llled as illustrated ln ~igure 3. ~orce is applled to the nozzle 10, placing the seal 72 in sealing engagement with the surface 74 on the filler neck 76, displacing the piston 42 into the hollow body 36 and compressing the spring 63. The stop screw 78 passes through the opening in the filler neck 76 and is brought into engagement with the surface 80 thereon locking the nozzle 10 into the filler neck 76, relieving the operator from the necessity of holding the --nozzle during the filling operation. It should be noted that the seal 72 is very little larger than the size of the filler neck 76, thus providing for the desired sealing engagement regardless of the cosmetic treatment of the vehicle surrounding the filler neck.
Simultaneously, the seal 60, which is carried by the piston 42, is displaced inwardly and away ~rom the vapor passage-way valve member 62 thereby opening the vapor passageway extending ~;
through the nozzle to the flow of vapor. It can be appreciated that vapor leaving the filler neck 76 passes through khe opening therein, through the piston 42, past the vapor passageway valve member 62 and seal 60, and into the interior of the hollow body ... . - . . .. ., . , ~ ~ . ,., ~ , , .
1~3~9 member 36. The vapors then pass outwardly through the port 44 in the hollow member 36 into the conduits 46 and 84 and into the vapor recovery system.
Displacement of the piston 42 into the hollow member 36 also moves the ferromagnetic member 64 until the North magnetic pole thereon is disposed adjacent the North magnetic pole on the valve member 50 which is located in the conduit 28. When the North poles align, the opposing ~orce generated thereby displaces the valve member 50 away from the seat 48 in the conduit 28 opening the conduit 28 to flow.
The person operating the nozzle 10 then grips the trigger 18 which moves the valve actuating mechanism 20 rearwardly, that ;
is, to the right as seen ln ~igure lA, opening the ma:ln valve 17 to the ~low o~ ~uel. As ~uel rlows through the nozzl~ b~dy 12 and outwardly through the spout 30 lnto the kank, a slight negatlve pressure is generated in the induction system moving gas through the passageways 31l, 32 and through the conduit 28. So long as the conduit 28 remains open, this slight pressure reduction is not sufficient to displace the diaphragm 24 and latch mechanism 22 out of the valve actuating mechanism 20 and, thus, the nozzle will ~-continue to remain open to provide fuel flow into the tank.
As previously mentioned, vapors generated in the tank flow upwardly through the filler neck 76 through the sealed vapor passageway system provided in the piston 42 and hollow member 36 ;
25. and outwardly into the vapor recovery system through the conduits 46 and 48.
As the tank fills, the liquid ~uel will eventually reach the lower end of the conduit 28 blocking the conduit 28 against further gas flow. When this occurs, the negative pressure in the induction system is considerably increased and reaches the point at which the diaphragm 24 is pulled relatively downwardly (see Figure 2) displacing the latch mechanism 22 out of the valve - ~3~i5~ :
actuating mechanism 20. The valve actuating mechanism 20 can then ~-~
collapse permitting the spring-loaded main valve 17 to close de-spite the fact that the trigger mechanism 18 may still be in a ;
position wherein the valve 17 would normally be open.
It will be apparent from the foregoing, that so long as the conduit 28 remains blocked, any ef`fort to deliver additional ~uel lnto khe tank wlll be ~rultless slnce the maln valve 17 can-not be moved off o~ its seat.
After the tank has been filled, a slight force is exerted on the nozzle 10 moving the stop screw 78 free of the ~iller neck 76. The nozYle 10 can then be removed from the flller neck 76. As this occurs, the spring 63 displaces the piston l~2 relatlvely out-wardly of the hollow member 36 untll the seal 60 engage~ the vapor passageway valve member 62. Upon closure o~ the vapor passageway valve, any vapors contalned ln the vapor recovery system lncludlng the conduits L~6 and 48 will be trapped therein.
Slmultaneously, the ferromagnetlc member 64 has moved wlth the piston 42 untll the South magnetic pole thereon is a- ;
ligned with the South magnetic pole in the valve member 50. With the poles aligned in this manner, the valve member 50 is driven against the seat 48 blocking the conduit 28 and preventing further delivery of fuel through the nozzle 10 until the nozzle 10 is inserted in a tank wherein the fuel level is sufficiently low to clear the conduit 28.
From the foregoing detailed description of the invention, it wlll be appreclated that the vapor recovery nozzle 10 provldes: ;
a means of posltlvely forming a seal with the flller neck 76; a sealed vapor recovery passageway extendlng through the nozzle;
means for entrapplng the vapors recovered ln the system; and, a ;
posltive means for latchlng the vapor recovery nozzle 10 lnto the filler neck of the tank to be filled.
It wlll also be understood that the detailed description ,~
_9_ ~3ti5iS9 of the preferred embodiment is presented by way o~ example only and that many changes and modifications can be made thereto with-out departing from the spirit or scope of the invention.
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forcing the main valve assembly 17 off its seat.
As can be seen more clearly in Figure 2, the actuating mechanism 20 includes a diaphragm controlled latch 22. A dia- -phragm 24 of the latch 22 is displaced inwardly of the nozzle body assembly 12 by a spring 26. With the latch 22 in this position, movement of the trigger 18 displaces the main valve 16 off its seat.
However, an ~nduction system that includes a conduit 28 located in spout 30, a passageway 32 ~ormed ln the body assembly 12, and a passageway 34 that extends from the diaphragm 24 to the throat of the valve seat in main valve assembly 16. `~
Briefly, and so long as the induction system is unob-structed, gasoline flowing through the nozzle body assembly 12 in-duces ga~ to flow through the conduit 28, the passageway 32 and the passageway 34 so that there is no net pressure e~ect on the d:la-phragm 24. However, upon ob~truct:Lon of the conduik 2~, a nega- ;
tive pressure is created on the diaphragm 24 displacing the latch 22 out of the valve actuating mechanism 20 and releasing the main valve 16 so that it can reseat shutting off flow through the nozzle 10.
20 ` In addition to the conduit 28 and the spout 30, the spout assembly 14 also includes a hollow member 36 having a relatively `
small end 38 that is screwed into the nozzle body assembly 12 and a relatively large end portion 40 that is sized to slidingly receive a piston 42. It will be noted that the interior o~ the hollow `; ;
member 36 is threaded to receive one end of the spout 30 and to ~`~
retain the spout 30 in concentricity with the large end portion 40 thereof.
A port 44 extends through the side wall of the hollow member 36 providing fluid communication between the interior `
thereo~ and a vapor recovery conduit 46 that ~orms a portion o~
the handle assembly 16. ;
As previously mentioned, the conduit 28 ~orms a portion ':" ~`.
:. ~
,`' ~ ' ;5~9 of the induction system and~ as can be clearly seen in ~igure lA, :
the upper end of the conduit 28 is connected with a portion of the nozzle body 12. It will be noted in ~igure lB that the end of the ::
conduit 28 extends through the side wall of the spout 30 near the -discharge end of the spout 30 for purposes which will be described hereinafter. Intermediate the ends of the conduit 28, the conduit is provided with an annular valve seat 48 that is arranged to seal-in~ly en~a~e one end o~ a valve member 50 that is movably located in the conduit 28.
The valve member 50 is movable toward and away from the :~
seat 48 to open and close the conduit 28. The valve member 50 may be constructed from, or at least lncludes, a ferromagnetic portion having North and South magnetic poles located as shown in Figure lB.
The piston 42 is hollow and enc~rcles the spout 30. The interlor of a small end 52 on the piston ll2 ls provl~ed w:Lth key~
ways to receive ~eys 54 mounted on the exter:Lor Or the spout 30 to retain the piston 42 in a predetermined alignment with the spout 30. The piston 42 fits within the large end portion 40 of the hollow member 36 and is slideable therein. To prevent the escape .
of vapors from within the hollow member 36 and the piston 42, the `
piston 42 carries a seal 56 that slidingly and sealingly engages the interior of the hollow member 36.
The end of the piston 42 carrying the seal 56 has an enlarged bore 58 to permit the flow of vapors between the spout 30 .
and the piston 42. On the same end of the piston 42, there is located an annular seal 60 that, in its closed position, abuts a vapor passageway valve member 62 that is mounted on the spout 30.
The purpose o~ the vapor passageway valve which includes the seal 60 and the valve member 62 is to prevent the escape of vapors out-wardly from the nozzle 10 when the valve member 62 i8 in sealing engagement with the seal 60.
A compression spring 63 is located within the hollow r~ - \
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member 36 and engages the piston 42 to bias the piston 42 rela-tively outwardly of the hollow member 36. The engagement between the valve member 62 and seal 60 also functions to limit the out-ward movement of the piston 42 in the hollow member 36.
The piston 42 is also provided with a ferromagnetic mem-ber 64 located adjacent the bore 58 thereof. The ferromagnetic member 64 is disposed in ~uxtaposition with the valve member 50 located in the conduit 28. It will be noted, however, that the North and South magnetic poles of the member 64 are oppositely ori-ented with respect to those in the valve member 50. The purpose of .
the keyways in the piston 42 and the keys 5ll on the conduit 28 is to retain the ferromagnetic member 6l~ ad~acent the valve member 50.
With the poles oriented as shown, it will be appreciated that the ~.
repelling force developed by adJacent, llke poles shown ln :~:L~l:re lB will cause the valve member 50 to sealingly enga~e the seat l~8 in the conduit 28, thereby preventing the flow of fluid therethrough. :
An articulated seal member 66 is movably connected to the small end 52 of the piston 42 by a pin 68. A seal 70 located in the small end of the seal member 66 forms a flexible, vapor- ~.
20 tight seal with the exterior of the small end 52 of the piston 42.
A large seal 72 located on the opposite end ofthe seal member 66 is provided to sealingly engage a surface 74 located on a filler neck 76 of the fuel tank as shown in ~igure 3. As illustrated, a garter spring 77 located within the seal 70 aids in maintaining the fl.uid-tight sealing relationship between the seal 70 and piston 42.
A stop screw 78 or other similar abutment member is mounted on the spout 30. The stop screw 78, as can be seen in ~igure 3, is provided to engage an inner surface 80 on the filler neck 76 to securely retain the nozzle 10 in the filler neck 76.
In addition to the conduit 46, the handle assembly 16 includes a guard 82 that is arranged to protect the trigger . ~ :
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mechanism 18 and also carry a second conduit 84 that is in fluid communication with the conduit 46 and thus with the vapor recovery passageway that extends through the nozzle 10. The opposite end of the conduit 84 will be connected with a vapor recovery system (not shown) that is provided to remove the vapors being generated during the filling of the tank with fuel.
OPeration of the Preferred Embodiment. In operation, the nozzle 10 is connected via the threads at one end of the nozzle body 12 to a fuel supply (not shown) and the conduit 84 will be connected into a vapor recovery system (not shown). The fuel sup-ply will be provided with a pump (not shown) that will deliver liquid fuel to the nozzle 10 under pressure. ;
The nozzle 10 is removed ~rom the fuel d:Lspenser and the spout 30 ~nserted in the ~iller neck 76 o:~ a tank to be ~llled as illustrated ln ~igure 3. ~orce is applled to the nozzle 10, placing the seal 72 in sealing engagement with the surface 74 on the filler neck 76, displacing the piston 42 into the hollow body 36 and compressing the spring 63. The stop screw 78 passes through the opening in the filler neck 76 and is brought into engagement with the surface 80 thereon locking the nozzle 10 into the filler neck 76, relieving the operator from the necessity of holding the --nozzle during the filling operation. It should be noted that the seal 72 is very little larger than the size of the filler neck 76, thus providing for the desired sealing engagement regardless of the cosmetic treatment of the vehicle surrounding the filler neck.
Simultaneously, the seal 60, which is carried by the piston 42, is displaced inwardly and away ~rom the vapor passage-way valve member 62 thereby opening the vapor passageway extending ~;
through the nozzle to the flow of vapor. It can be appreciated that vapor leaving the filler neck 76 passes through khe opening therein, through the piston 42, past the vapor passageway valve member 62 and seal 60, and into the interior of the hollow body ... . - . . .. ., . , ~ ~ . ,., ~ , , .
1~3~9 member 36. The vapors then pass outwardly through the port 44 in the hollow member 36 into the conduits 46 and 84 and into the vapor recovery system.
Displacement of the piston 42 into the hollow member 36 also moves the ferromagnetic member 64 until the North magnetic pole thereon is disposed adjacent the North magnetic pole on the valve member 50 which is located in the conduit 28. When the North poles align, the opposing ~orce generated thereby displaces the valve member 50 away from the seat 48 in the conduit 28 opening the conduit 28 to flow.
The person operating the nozzle 10 then grips the trigger 18 which moves the valve actuating mechanism 20 rearwardly, that ;
is, to the right as seen ln ~igure lA, opening the ma:ln valve 17 to the ~low o~ ~uel. As ~uel rlows through the nozzl~ b~dy 12 and outwardly through the spout 30 lnto the kank, a slight negatlve pressure is generated in the induction system moving gas through the passageways 31l, 32 and through the conduit 28. So long as the conduit 28 remains open, this slight pressure reduction is not sufficient to displace the diaphragm 24 and latch mechanism 22 out of the valve actuating mechanism 20 and, thus, the nozzle will ~-continue to remain open to provide fuel flow into the tank.
As previously mentioned, vapors generated in the tank flow upwardly through the filler neck 76 through the sealed vapor passageway system provided in the piston 42 and hollow member 36 ;
25. and outwardly into the vapor recovery system through the conduits 46 and 48.
As the tank fills, the liquid ~uel will eventually reach the lower end of the conduit 28 blocking the conduit 28 against further gas flow. When this occurs, the negative pressure in the induction system is considerably increased and reaches the point at which the diaphragm 24 is pulled relatively downwardly (see Figure 2) displacing the latch mechanism 22 out of the valve - ~3~i5~ :
actuating mechanism 20. The valve actuating mechanism 20 can then ~-~
collapse permitting the spring-loaded main valve 17 to close de-spite the fact that the trigger mechanism 18 may still be in a ;
position wherein the valve 17 would normally be open.
It will be apparent from the foregoing, that so long as the conduit 28 remains blocked, any ef`fort to deliver additional ~uel lnto khe tank wlll be ~rultless slnce the maln valve 17 can-not be moved off o~ its seat.
After the tank has been filled, a slight force is exerted on the nozzle 10 moving the stop screw 78 free of the ~iller neck 76. The nozYle 10 can then be removed from the flller neck 76. As this occurs, the spring 63 displaces the piston l~2 relatlvely out-wardly of the hollow member 36 untll the seal 60 engage~ the vapor passageway valve member 62. Upon closure o~ the vapor passageway valve, any vapors contalned ln the vapor recovery system lncludlng the conduits L~6 and 48 will be trapped therein.
Slmultaneously, the ferromagnetlc member 64 has moved wlth the piston 42 untll the South magnetic pole thereon is a- ;
ligned with the South magnetic pole in the valve member 50. With the poles aligned in this manner, the valve member 50 is driven against the seat 48 blocking the conduit 28 and preventing further delivery of fuel through the nozzle 10 until the nozzle 10 is inserted in a tank wherein the fuel level is sufficiently low to clear the conduit 28.
From the foregoing detailed description of the invention, it wlll be appreclated that the vapor recovery nozzle 10 provldes: ;
a means of posltlvely forming a seal with the flller neck 76; a sealed vapor recovery passageway extendlng through the nozzle;
means for entrapplng the vapors recovered ln the system; and, a ;
posltive means for latchlng the vapor recovery nozzle 10 lnto the filler neck of the tank to be filled.
It wlll also be understood that the detailed description ,~
_9_ ~3ti5iS9 of the preferred embodiment is presented by way o~ example only and that many changes and modifications can be made thereto with-out departing from the spirit or scope of the invention.
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Claims (8)
1. An improved gasoline dispensing nozzle of the auto-matic shut-off type for use in connection with vapor recovery systems including a body containing a flow control valve, induc-tion means for causing gas flow through the nozzle, a trigger for activating the flow control valve and pressure responsive latch means operable in conjunction with the induction means to release the flow control valve regardless of the trigger position, the improvement comprising:
an elongate hollow spout;
a conduit extending substantially through the interior of said spout for connection with the induction means and including valve means for opening and closing said conduit;
a hollow member for connecting said spout in fluid com-munication with the body and having an enlarged por-tion forming a portion of a vapor passageway with said spout and a port therethrough providing fluid commu-nication between said vapor passageway and vapor recovery system;
a hollow piston loosely encircling said spout and forming a portion of said vapor passageway therewith, said piston having a first end portion slidingly and seal-ingly received in said hollow member and having a second end portion;
an articulated seal assembly located on and movable with the second end of said piston in sealing relationship therewith and loosely encircling said spout, said as-sembly forming another portion of the vapor passageway having a seal member thereon arranged to sealingly engage a projecting surface on a tank to be filled whereby said vapor passageway provides communication between the tank and vapor recovery system; and, valve operating means carried by said piston for operat-ing said valve means to open said conduit when said piston is moved into said hollow member permitting operation of said nozzle and operating said valve means to close said conduit preventing operation of said nozzle.
an elongate hollow spout;
a conduit extending substantially through the interior of said spout for connection with the induction means and including valve means for opening and closing said conduit;
a hollow member for connecting said spout in fluid com-munication with the body and having an enlarged por-tion forming a portion of a vapor passageway with said spout and a port therethrough providing fluid commu-nication between said vapor passageway and vapor recovery system;
a hollow piston loosely encircling said spout and forming a portion of said vapor passageway therewith, said piston having a first end portion slidingly and seal-ingly received in said hollow member and having a second end portion;
an articulated seal assembly located on and movable with the second end of said piston in sealing relationship therewith and loosely encircling said spout, said as-sembly forming another portion of the vapor passageway having a seal member thereon arranged to sealingly engage a projecting surface on a tank to be filled whereby said vapor passageway provides communication between the tank and vapor recovery system; and, valve operating means carried by said piston for operat-ing said valve means to open said conduit when said piston is moved into said hollow member permitting operation of said nozzle and operating said valve means to close said conduit preventing operation of said nozzle.
2. The improved nozzle of claim 1 and also including:
spring means in said hollow member for biasing said piston and seal assembly outwardly of said hollow member; and, stop means on said spout outwardly of said seal assembly for engaging the tank to be filled, whereby said nozzle is securely retained in said tank with the seal member in sealing engagement with the projecting surface thereon.
spring means in said hollow member for biasing said piston and seal assembly outwardly of said hollow member; and, stop means on said spout outwardly of said seal assembly for engaging the tank to be filled, whereby said nozzle is securely retained in said tank with the seal member in sealing engagement with the projecting surface thereon.
3. The improved nozzle of claim 1 wherein said valve means includes an annular valve seat in said conduit and a valve member movable into and out of engagement with said seat to open and close said conduit.
4. The improved nozzle of claim 3 wherein:
said valve member includes North and South magnetic poles; and, said valve operating means includes North and South magnetic poles disposed in Juxtaposition to, but op-positely oriented with respect to the poles of said valve member.
said valve member includes North and South magnetic poles; and, said valve operating means includes North and South magnetic poles disposed in Juxtaposition to, but op-positely oriented with respect to the poles of said valve member.
5. The improved nozzle of claim 1 and also including:
vapor passageway valve means on said spout and piston for closing said vapor passageway when said nozzle is not engaging the tank.
vapor passageway valve means on said spout and piston for closing said vapor passageway when said nozzle is not engaging the tank.
6. The improved nozzle of claim 5 wherein said vapor passageway valve means includes:
an annular seal member carried by and located internally of said piston; and, an annular abutment on said spout located internally of said piston and arranged to engage said annular seal member to close said vapor passageway when said nozzle is not engaging the tank and to limit the relative outward movement of said piston from said hollow mem-ber.
an annular seal member carried by and located internally of said piston; and, an annular abutment on said spout located internally of said piston and arranged to engage said annular seal member to close said vapor passageway when said nozzle is not engaging the tank and to limit the relative outward movement of said piston from said hollow mem-ber.
7. The improved nozzle of claim 1 wherein said articu-lated seal assembly also includes:
a relatively rigid seal body encircling said spout and piston and supporting said seal member;
connecting means attaching said seal body to said piston for movement therewith and permitting limited articu-lation of said seal body relative to said piston; and, flexible seal means on said seal body sealingly engaging said piston in all positions of said seal body relative to said piston.
a relatively rigid seal body encircling said spout and piston and supporting said seal member;
connecting means attaching said seal body to said piston for movement therewith and permitting limited articu-lation of said seal body relative to said piston; and, flexible seal means on said seal body sealingly engaging said piston in all positions of said seal body relative to said piston.
8. The improved nozzle of claim 7 and also including:
spring means in said hollow member for biasing said piston and seal assembly outwardly of said hollow member;
stop means on said spout outwardly of said seal assembly for engaging the tank to be filled, whereby said nozzle is securely retained in said tank with the seal member in sealing engagement with the projecting surface thereon;
vapor passageway valve means for closing said vapor pas-sageway when said nozzle is not engaging the tank, said vapor passageway valve means including an annu-lar seal carried by and located internally of said piston, and an annular abutment on said spout located internally of said piston and arranged to engage said annular seal member to close said vapor passageway and to limit the relative outward movement of said piston from said hollow member; and, wherein said valve means includes an annular valve seat in said conduit and a valve member having North and South magnetic poles, said valve member being movable into and out of engagement with said valve seat to open and close said conduit; and, said valve operating means includes North and South magnetic poles in juxtaposition to, but oppositely oriented with respect to the poles of said valve mem-ber, whereby the magnetic poles on said valve operat-ing means are located in opposition to the poles of said valve member holding said valve member on or off said seat due to the repulsing forces generated by said magnetic poles.
spring means in said hollow member for biasing said piston and seal assembly outwardly of said hollow member;
stop means on said spout outwardly of said seal assembly for engaging the tank to be filled, whereby said nozzle is securely retained in said tank with the seal member in sealing engagement with the projecting surface thereon;
vapor passageway valve means for closing said vapor pas-sageway when said nozzle is not engaging the tank, said vapor passageway valve means including an annu-lar seal carried by and located internally of said piston, and an annular abutment on said spout located internally of said piston and arranged to engage said annular seal member to close said vapor passageway and to limit the relative outward movement of said piston from said hollow member; and, wherein said valve means includes an annular valve seat in said conduit and a valve member having North and South magnetic poles, said valve member being movable into and out of engagement with said valve seat to open and close said conduit; and, said valve operating means includes North and South magnetic poles in juxtaposition to, but oppositely oriented with respect to the poles of said valve mem-ber, whereby the magnetic poles on said valve operat-ing means are located in opposition to the poles of said valve member holding said valve member on or off said seat due to the repulsing forces generated by said magnetic poles.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US508581A US3900056A (en) | 1974-09-23 | 1974-09-23 | Vapor recovery nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1036559A true CA1036559A (en) | 1978-08-15 |
Family
ID=24023287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA228,519A Expired CA1036559A (en) | 1974-09-23 | 1975-06-04 | Vapor recovery nozzle |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3900056A (en) |
| JP (1) | JPS5139418A (en) |
| BR (1) | BR7505630A (en) |
| CA (1) | CA1036559A (en) |
| DE (1) | DE2527556A1 (en) |
| FR (1) | FR2285336A1 (en) |
| IT (1) | IT1040638B (en) |
| NL (1) | NL7507507A (en) |
| SE (1) | SE7510325L (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4649969A (en) * | 1976-06-17 | 1987-03-17 | Dover Corporation | Liquid dispensing nozzle having a sealing arrangement for vapor return means |
| US4143689A (en) * | 1977-02-22 | 1979-03-13 | Emco Wheaton Inc. | Flow control for vapor recovery nozzle |
| DE2835488A1 (en) * | 1977-08-17 | 1979-03-01 | Exxon Research Engineering Co | FILLING VALVE FOR LIQUIDS |
| US4131140A (en) * | 1977-12-28 | 1978-12-26 | Wylain, Inc. | Automatic fluid dispensing apparatus |
| US4195673A (en) * | 1978-11-20 | 1980-04-01 | General Motors Corporation | Fuel tank fill tube with a magnetically actuated valve |
| JPS60217996A (en) * | 1984-04-11 | 1985-10-31 | 田村 茂則 | Automatic valve closing type lubricating nozzle |
| DE4028571C1 (en) * | 1990-09-08 | 1992-02-06 | Karlheinz 2000 Hamburg De Ehlers | Gas return on vehicle fuel tank filler - has choke acting as flow metering device and gas return line encloses liq. fuel line |
| US5127451A (en) * | 1990-09-24 | 1992-07-07 | Husky Corporation | Fuel dispensing nozzle improvement |
| US5327949A (en) * | 1992-10-19 | 1994-07-12 | Emco Wheaton, Inc. | Fuel dispensing nozzle |
| US5452750A (en) * | 1993-12-03 | 1995-09-26 | Gilharco, Inc. | Manually activated vapor valve for gasoline dispensers |
| PT2428485E (en) * | 2010-09-13 | 2014-04-03 | Elaflex Hiby Tanktechnik Gmbh & Co Kg | Fuel valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3710830A (en) * | 1970-08-31 | 1973-01-16 | S Gilson | Hydrocarbon vapor collecting apparatus |
-
1974
- 1974-09-23 US US508581A patent/US3900056A/en not_active Expired - Lifetime
-
1975
- 1975-06-04 CA CA228,519A patent/CA1036559A/en not_active Expired
- 1975-06-16 IT IT50071/75A patent/IT1040638B/en active
- 1975-06-19 DE DE19752527556 patent/DE2527556A1/en active Pending
- 1975-06-24 NL NL7507507A patent/NL7507507A/en unknown
- 1975-07-16 JP JP50087172A patent/JPS5139418A/ja active Pending
- 1975-09-02 BR BR7505630*A patent/BR7505630A/en unknown
- 1975-09-16 SE SE7510325A patent/SE7510325L/en unknown
- 1975-09-19 FR FR7528747A patent/FR2285336A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2527556A1 (en) | 1976-04-01 |
| FR2285336A1 (en) | 1976-04-16 |
| BR7505630A (en) | 1976-08-03 |
| US3900056A (en) | 1975-08-19 |
| JPS5139418A (en) | 1976-04-02 |
| FR2285336B3 (en) | 1978-05-05 |
| IT1040638B (en) | 1979-12-20 |
| NL7507507A (en) | 1976-03-25 |
| SE7510325L (en) | 1976-03-24 |
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