Patent Publication Number: US-2018050841-A1

Title: Gravity nozzle

Description:
This application is related to U.S. patent application Ser. No. 14/731,320, entitled “Device and System for Automotive Refueling”, filed Jun. 4, 2015, U.S. patent application Ser. No. 14/852,688, entitled “System and Fuel Nozzle for Vehicle Refueling”, filed Sep. 14, 2015, and U.S. patent application Ser. No. 15/162,054, entitled “Fluid Delivery Dolly”, filed May 23, 2016, the entire contents of which are incorporated herein by reference and relied upon. 
    
    
     BACKGROUND 
     Fueling consumer vehicles can be a time consuming and labor intensive practice for the vehicle user. The current practice is for the user to (1) monitor the vehicle fuel level; (2) determine a low fuel condition; (3) locate a fueling station; (4) purchase fuel; (5) gain access to the fuel tank; and (6) manually service the fuel tank. 
     Other previously user labor intensive services have been streamlined using networked systems and smart phone technology. As an example, car service procurement typically requires the user to determine the need for a car, locate a car services&#39; contact information, determine and communicate the desired pickup location, negotiate the type and amount of payment at the end of the service, and pay. This process has been streamlined to the point where the user simply launches a smart phone application and pushes a button to request the car service. The phone determines the location of pickup, which is utilized by the service to locate a nearby and available driver in the area and direct the driver to the corresponding pickup location. At the end of the service the payment to the driver is automatically taken care of by the service provider based on previous payment information provided by the user and a detailed receipt can be sent to the user. 
     This type of service streamlining is also desirable to enable fuel delivery services. One could consider a somewhat parallel approach to the car service procurement streamlining above. Similarly, for example, a smart phone application could allow a user to request fuel service at the touch of a button. The smart phone application would determine the location of the phone and transmit a request for fuel delivery to a fueling service. The fueling service would arrive at the location of the phone to service the vehicle fuel needs. 
     Payment could also be handled similarly to the car service procurement applications. However, to enable this in a way that is useful, various additional requirements that are specific to fuel delivery must be considered. Therefore, new systems and/or devices must be developed for this type of delivery service to function in a practical and useful way for the everyday consumer. For example, limited fuel service exists in some specific industries like construction or road side assistance. In those industries a fuel courier transports fuel to a location near the vehicle needing fuel and a person in the location (e.g., owner or driver of the vehicle) receives the fuel and provides delivery verification. This situation limits the convenience of the service, at least in part, because the person must wait to receive the fuel, identify to the courier the vehicle needing fuel and/or, in some events, dispense the fuel himself/herself out of a conventional container which can result in some hazards, including fuel leakage in both liquid and vapor forms. In addition, it is difficult and impractical for the requester to verify that the amount of fuel purchased was actually delivered and dispensed in the vehicle&#39;s fuel tank, that the fuel was not altered by the courier before it was dispensed (e.g., diluted), and that it is of the quality purchased (e.g., octane rating, etc.), due to the type of service. 
     Furthermore, in the event a fuel courier is transporting fuel in small quantities (e.g., a five gallon or other sized conventional portable fuel container, as opposed to a fuel truck), the transport of the portable fuel container can be hazardous. This includes transport within the fuel courier vehicle and transport from the fuel courier vehicle to the vehicle needing fuel. For example, fuel can leak from a portable fuel container in either liquid or vapor form, both of which are highly flammable. Likewise, for example, fuel can leak from a portable fuel container while being delivered (e.g., while being poured). This is especially relevant if the portable fuel container is rotated (e.g., rotated upside down) to facilitate pouring (e.g., gravity pouring). Thus, proper sealing of portable fuel containers is an important concern. Ideally, portable fuel containers should be optimally sealed during transport and during delivery, so as to limit inadvertent leakage in either liquid or vapor forms. 
     In view of the foregoing, new devices and systems are highly desirable in order to have a smart phone based fuel delivery service that works at the consumer level and in a practical, safe, and cost effective way. In particular, a system that can provide controlled delivery of fuel in an ergonomically and economically efficient manner, without requiring the customer, or a customer&#39;s representative, to be present at the time of delivery. 
     SUMMARY 
     The present disclosure is directed to various embodiments of threaded container valves and gravity nozzles. In one embodiment, the threaded container valve includes a valve section, having a first inlet and a second inlet. Each of the first inlet and the second inlet are in fluid communication with a first side of the valve section and a second side of the valve section. The threaded container valve also includes an engagement section coupled to the valve section. The engagement section has an inner wall and an outer wall. The inner wall defines a thread profile configured to engage with a threaded container. 
     In another embodiment, the gravity nozzle includes a threaded container valve and a delivery tube. The threaded container valve includes a valve section, having a first inlet and a second inlet. Each of the first inlet and the second inlet are in fluid communication with a first side of the valve section and a second side of the valve section. The threaded container valve also includes an engagement section coupled to the valve section. The engagement section has an inner wall and an outer wall. The inner wall defines a thread profile configured to engage with a threaded container. The delivery tube includes a fluid tube and a vapor tube. A first end of the fluid tube is configured to engage with the first inlet on the first side of the valve section. A first end of the vapor tube is configured to engage with the second inlet on the first side of the valve section. A second end of the fluid tube and a second end of the vapor tube are configured to engage with a delivery inlet. 
     In particular embodiments, the threaded container valve and the gravity nozzle ensure proper sealing (e.g., configured to prevent fluid leakage and vapor leakage) on a container (e.g., a portable fuel container). For example, the threaded container valve and the gravity nozzle form a leak free system. This reduces health, safety, and environmental risks associated with leakage of particular substances (e.g., gasoline). Additionally, in particular embodiments, the threaded container valve and the gravity nozzle provide the user with the ability to unseal the container, and pour fluid from the container (e.g., a gravity pour) to an external location in a controlled manner. This further reduces risks associated with leakage of particular substances when handled by a user (e.g., during pouring). 
     Additional features and advantages are described herein, and will be apparent from the following Detailed Description and the Figures. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  illustrates a threaded container valve, according to an example embodiment of the present disclosure. 
         FIG. 2  illustrates an alternate view of the threaded container valve, according to an example embodiment of the present disclosure. 
         FIG. 3  illustrates an alternate cut-away view of the threaded container valve, according to an example embodiment of the present disclosure. 
         FIG. 4  illustrates a gravity nozzle, according to an example embodiment of the present disclosure. 
         FIG. 5  illustrates an alternate cut-away view of the gravity nozzle, according to an example embodiment of the present disclosure. 
         FIG. 6  illustrates an alternate cut-away view of the gravity nozzle, according to an example embodiment of the present disclosure. 
         FIG. 7  illustrates an alternate cut-away view of the gravity nozzle, according to an example embodiment of the present disclosure. 
         FIG. 8  illustrates a delivery tube, according to an example embodiment of the present disclosure. 
         FIG. 9  illustrates a flowchart of a method of using a gravity nozzle, according to an example embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  illustrates an example embodiment of a threaded container valve. The threaded container valve  100  includes a valve section  110  and an engagement section  120 . In an embodiment, the engagement section  120  is coupled to the valve section  110 . In a different embodiment, the valve section  110  and the engagement section  120  are formed of a single piece of material, which collectively form the threaded container valve  100 . The threaded container valve  100  is generally configured to engage with a threaded container  130 . For example, by engaging with the threaded container  130 , the threaded container valve  100  seals the threaded container  130 . 
     In one non-limiting example, the threaded container  130  is a portable fuel container. In one such example, the threaded container  130  is a 5-gallon capacity portable fuel container. It should be noted, however, that the threaded container  130  as discussed herein is in no way limited to certain fluid contents nor limited to any particular size. For example, threaded containers (e.g., threaded container  130 ) may be configured to hold any type of substance including a liquid (e.g., water), gel (e.g., lubricant), solid (e.g., sand), etc. and may be any size (e.g., 1-liter, 5-gallon, 10-gallon, 55-gallon, etc.). In various examples, the threaded container  130  may be plastic or metal. 
     The valve section  110  of the threaded container valve  100  additionally includes a first inlet  111  and a second inlet  112 .  FIG. 2  illustrates an alternate view of an example embodiment of the threaded container valve  100 , with the first inlet  111  and the second inlet  112 . In an example embodiment, the threaded container valve  100  further includes a removable cap (not shown). For example, the removable cap may be a circular plastic cap, rubber stopper, etc. The removable cap may interface with the valve section  110  of the threaded container valve  100 . In one example, the removable cap interfaces with the valve section  110  by snap-fitting to the valve section  110 . For example, the valve section  110  may include a raised edge, defining a circumference larger than a circumference of the removable cap, such that the removable cap snap-fits inside the circumference defined by the raised edge of the valve section  110 . In a different related example, the removable cap interfaces with the engagement section  120  by snap-fitting to the engagement section  120  in a similar way. In a second example, the removable cap interfaces with the valve section  110  via a thread-profile. For example, the removable cap may include threads and the valve section  110  may include the raised edge with a thread profile, such that the removable cap fits inside or around the raised edge and engages with the valve section  110  via its thread profile. 
     By interfacing with the valve section  110 , the removable cap may form an additional seal over the first inlet  111  and the second inlet  112 . Forming an additional seal may further ensure that fluid and vapor do not leak from the threaded container  130  when the threaded container valve  100  is not being used for fluid delivery, as described herein (e.g., no undesirable gasoline leakage from the threaded container  130  during long term storage or transportation). 
       FIG. 3  illustrates an alternate cut-away view of an example embodiment of the threaded container valve  100 . As previously noted, the valve section  110  includes the first inlet  111  and the second inlet  112 . Each of the first inlet  111  and the second inlet  112  are in fluid communication with a first side  113  of the valve section  110  and a second side  114  of the valve section  110 . In an example, the first side  113  of the valve section  110  is a location external to the threaded container  130  (e.g., outside the threaded container  130 ). Likewise, in an example, the second side  114  of the valve section  110  is a location internal to the threaded container  130  (e.g., inside the threaded container  130 ). 
     The engagement section  120  has an inner wall  121  and an outer wall  122 . For example, the inner wall  121  defines a thread profile  125 , which is configured to engage with the threaded container  130 . In this way, the threaded container valve  100  engages with the threaded container  130  to seal the threaded container  130 . For example, the threaded container valve  100  is rotated around the threaded container  130  at the inlet of the threaded container  130  to form the seal. Sealing of the threaded container  130  is particularly challenging because, often, threaded containers  130  (e.g., portable fuel containers) are blow-molded (e.g., having non-uniform walls). Sealing the threaded container  130  is difficult when the threads or rim of the threaded container  130  are, likewise, non-uniform. Therefore, in some embodiments the threaded container valve  100  (e.g., the thread profile  125  on the inner wall  121  of the engagement section  120  of the threaded container valve  100 ) may implement an o-ring or other type of gasket. Implementation of an o-ring or other type of gasket may improve sealing characteristics between the threaded container valve  100  and the threaded container  130 . In an alternate example, the outer wall  122  of the engagement section  120  defines the thread profile  125 , such that the threaded container valve  100  may engage with the threaded container  130  when the threaded container has internal threads. For example, the threaded container valve  100  is rotated inside the threaded container  130  at the inlet of the threaded container  130  to form the seal. 
     The threaded container valve  100  further includes a first sealing member  141  and a second sealing member  142 . The first sealing member  141  concentrically engages with the first inlet  111 . The second sealing member  142  concentrically engages with the second inlet  112 . In one non-limiting example, each of the components discussed herein (e.g., the valve section  110 , the engagement section  120 , the first sealing member  141 , the second sealing member  142 , etc.) are composed of aluminum. In a different example, each of the components discussed herein are composed of other metals (e.g., stainless steel, tungsten, etc.) or other suitable materials (e.g., glass, plastic, etc.) designed to resist corrosion by particular fluids (e.g., gasoline). Likewise, in another different example, some components may be made of one material (e.g., aluminum), whereas other components may be made of other materials (e.g., stainless steel). For example, the valve section  110  may be made of aluminum, while the first sealing member  141  and the second sealing member  142  may be made of stainless steel. 
     In an embodiment, the first sealing member  141  and the second sealing member  142  are spring-biased mechanical seals. In an embodiment, each of the first sealing member  141  and the second sealing member  142  have multiple positions of operation. For example, the first sealing member  141  and the second sealing member  142  each have an open position and a closed position. In an embodiment, each of the first sealing member  141  and the second sealing member  142  are biased (e.g., spring-biased) in the closed position, such that the first sealing member  141  and the second sealing member  142  prevent fluid communication within their respective inlets. For example, the first sealing member  141  prevents fluid communication within the first inlet  111 , between the first side  113  of the valve section  110  and the second side  114  of the valve section  110 . Likewise, for example, the second sealing member  142  prevents fluid communication within the second inlet  112 , between the first side  113  of the valve section  110  and the second side  114  of the valve section  110 . As illustrated in  FIG. 3 , each of the first sealing member  141  and the second sealing member  142  are biased in the closed position. 
     In an embodiment, each of the first sealing member  141  and the second sealing member  142  are configured to be placed in the open position upon actuation by a mechanical force. By being placed in the open position, each of the first sealing member  141  and the second sealing member  142  may permit fluid communication within their respective inlets. For example, once opened, the first sealing member  141  permits fluid communication within the first inlet  111 , between the first side  113  of the valve section  110  and the second side  114  of the valve section  110 . Likewise, for example, once opened, the second sealing member  142  permits fluid communication within the second inlet  112 , between the first side  113  of the valve section  110  and the second side  114  of the valve section  110 . In an embodiment, the mechanical force is generated by a first end of a delivery tube. 
     For example, as illustrated by  FIG. 4 , the first end  161  of the delivery tube  160  engages with the valve section  110  of the threaded container valve  100 , on the first side  113  of the valve section  110 . By including the delivery tube  160  (e.g., via delivery tube  160  engagement with the valve section  110  of the threaded container valve  100 ), the delivery tube  160  and the threaded container valve  100  may be collectively referred to as a gravity nozzle  150 . 
       FIG. 5  illustrates an alternate cut-away view of an example embodiment of the gravity nozzle  150 . The gravity nozzle  150  includes the threaded container valve  100 , which includes the valve section  110  and the engagement section  120  as described in detail above with respect to  FIGS. 1 to 3 . The gravity nozzle further includes the delivery tube  160 . The delivery tube  160  includes a fluid tube  165  and a vapor tube  166 . A first end  167  of the fluid tube  165  is configured to engage with the first inlet  111  on the first side  113  of the valve section  110 . A first end  168  of the vapor tube  166  is configured to engage with the second inlet  112  on the first side  113  of the valve section  110 . A second end of the fluid tube  165  (not shown) and a second end of the vapor tube  166  (not shown) are configured to engage with a delivery inlet (not shown), as described in greater detail below with reference to  FIGS. 7 to 9 . 
     As noted previously, in an embodiment, each of the first sealing member  141  and the second sealing member  142  are configured to be placed in the open position upon actuation by a mechanical force (e.g., the first end  161  of the delivery tube  160  engaging with the valve section  110  on the first side  113  of the valve section  110 ). For example, the first end  167  of the fluid tube  165  is configured to engage with the first inlet  111  on the first side  113  of the valve section  110  (e.g., concentric engagement), such that the first sealing member  141  is placed in the open position. Likewise, for example, the first end  168  of the vapor tube  166  is configured to engage with the second inlet  112  on the first side  113  of the valve section  110  (e.g., concentric engagement), such that the second sealing member  142  is placed in the open position. Each of the first sealing member  141  and the second sealing member  142  may be configured to have appropriate spring-biasing, such that an optimum force (e.g., manual actuation by a person) will place each of the first sealing member  141  and the second sealing member  142  in the open position. As illustrated in  FIG. 5 , each of the first sealing member  141  and the second sealing member  142  are in the open position. 
     With reference to  FIGS. 1 and 5 , in an embodiment, the delivery tube  160  further includes a cap section  170  coupled to the first end  161  of the delivery tube  160 . The cap section  170  has an inner wall  171  and an outer wall  172 . 
     In an example, the inner wall  171  of the cap section  170  additionally has a notch (not shown). The outer wall  122  of the engagement section  120  has a groove  126  (as shown in  FIG. 1 ). The groove  126  is configured to receive the notch from the cap section  170 , such that a seal is formed between the outer wall  122  of the engagement section  120  and the inner wall  171  of the cap section  170  when the notch is received by the groove  126 . The notch may be received by the groove  126  via a downward force of the cap section  170 , followed by a rotation of the cap section  170  (e.g., one-quarter turn). In an alternate embodiment, the relative positions of the groove  126  and the notch may be switched, such that the groove  126  is positioned on the inner wall  171  of the cap section  170  and the notch is positioned on the outer wall  122  of the engagement section  120 . In an embodiment, forming a seal between the outer wall  122  of the engagement section  120  and the inner wall  171  of the cap section  170 , when the notch is received by the groove  126 , ensures that the delivery tube  160  does not inadvertently disengage from the valve section  110  on the first side  113  of the valve section  110 . 
     In alternate examples, the cap section  170  may engage with the engagement section  120  of the threaded container valve  100  in other ways. For example, the cap section  170  may snap-fit to the engagement section  120  of the threaded container valve  100 . For example, the engagement section  120  may include a raised edge, defining a circumference larger than an inner groove on the inner wall  171  of the cap section  170 , such that the cap section  170  snap-fits around the engagement section  120  when the raised edge of the engagement section  120  snaps into the inner groove on the inner wall  171 . In an alternate embodiment, the relative positions of the groove and the raised edge are switched. 
     In a second alternate example, the cap section  170  may engage with the engagement section  120  of the threaded container valve  100  via a thread-profile. For example, the cap section  170  may include threads (e.g., threads on the inner wall  171  of the cap section). Likewise, for example, the engagement section  120  may include threads (e.g., threads on the outer wall  122  of the engagement section  120 ). The cap section  170  may rotate about the engagement section  120 , such that the threads of the inner wall  171  of the cap section  170  engage the threads of the outer wall  122  of the engagement section. In a related example, the cap section  170  may rotate about the delivery tube  160 . For example, the cap section  170  may rotate (e.g., rotate for engagement via threads) while the delivery tube (e.g., both the fluid tube  165  and the vapor tube  166 ) remain fixed (e.g., do not rotate). 
       FIG. 6  illustrates an alternate cut-away view of an example embodiment of the gravity nozzle  150 . In an embodiment, the first inlet  111  is configured for liquid flow between the first side  113  of the valve section  110  and the second side  114  of the valve section  110 . Likewise, in an embodiment, the second inlet  112  is configured for vapor flow between the first side  113  of the valve section  110  and the second side  114  of the valve section  110 . 
     In a related embodiment, the second inlet  112  includes a vapor tube extension  180 . The vapor tube extension  180  is in fluid communication with the second inlet  112 . The vapor tube extension  180  extends beyond the second inlet  112  on the second side  114  of the valve section  110 . For example, the vapor tube extension  180  extends inside the threaded container  130  to increase a pressure differential between fluid exiting the threaded container  130  (e.g., via the first inlet  111 ) and recovered vapor entering the threaded container  130  (e.g., via the second inlet  112 ), as described in greater detail below. The vapor tube extension  180  may include a low-pressure ball check valve to eliminate undesired fluid from entering into the vapor tube extension  180 . 
     In an alternate embodiment, the gravity nozzle  150  is configured solely for liquid flow. For example, the valve section  110  has a first inlet  111  configured for liquid flow between the first side  113  of the valve section  110  and the second side  114  of the valve section  110 . However, in this alternate embodiment, the valve section  110  does not include the second inlet  112 . Rather, any vapor transmission between the first side  113  of the valve section  110  and the second side  114  of the valve section must pass through the first inlet  111 . In another alternate embodiment, the valve section  110  has more than two inlets. For example, the valve section  110  may have a first inlet  111  configured for liquid flow, a second inlet  112  configured for vapor flow, and a third inlet. In various examples, the third inlet may be configured for liquid flow, vapor flow, or both types of flow. 
       FIG. 7  illustrates an alternate cut-away view of an example embodiment of the gravity nozzle  150 . The fluid tube  165  has a second end  191 . Likewise, the vapor tube  166  has a second end  192 . In an embodiment, the second end  191  of the fluid tube  165  and the second end  192  of the vapor tube  166  are configured to engage with a delivery inlet  199 . For example, the delivery inlet  199  may be the opening of a tank or container. In an embodiment, the delivery inlet  199  is a gas tank on a car. 
     As shown in  FIG. 7 , the second end  192  of the vapor tube  166  is configured concentrically around an outside of the second end  191  of the fluid tube  165 . In this configuration, the second end  191  of the fluid tube  165  may concentrically engage with the delivery inlet  199  by extending into the delivery inlet  199 . For example, the diameter of the second end  191  of the fluid tube  165  is less than the diameter of the delivery inlet  199 . Likewise, in this configuration, the second end  192  of the vapor tube  166  may concentrically engage with the delivery inlet  199  by surrounding the delivery inlet  199 . For example, the diameter of the second end  192  of the vapor tube  166  is greater than the diameter of the delivery inlet  199 . Through this concentric engagement, the second end  192  of the vapor tube  166  is configured for vapor recovery from the delivery inlet  199 . Vapor recovery is especially desirable with fluids that evaporate quickly (e.g., gasoline). Vapor recovery ensures that vapor is not inadvertently released into the air, thus improving safety and environmental risks associated with handling of particular fluids (e.g., pouring gasoline). Additionally, vapor recovery ensures that vapor is not wasted (e.g., vapor can be recovered and subsequently condensed into a pourable liquid form). 
     In a related embodiment, the first end  167  of the fluid tube  165  engages the first inlet  111  of the valve section  110 . Likewise, the first end  168  of the vapor tube  166  engages the second inlet  112  of the valve section  110 . In this way, a fluid circuit is formed. For example, the fluid circuit is formed from the delivery inlet  199 , through the vapor tube  166  (e.g., from the second end  192  of the vapor tube  166  to the first end  168  of the vapor tube  166 ), through the second inlet  112  (and the corresponding vapor tube extension  180 ), into the threaded container  130 , through the first inlet  112 , through the fluid tube (e.g., from the first end  167  of the fluid tube  165  to the second end  191  of the fluid tube  165 ), and back to the delivery inlet  199 . 
       FIG. 8  illustrates an example embodiment of the delivery tube  160 . For example, as previously described, the second end  192  of the vapor tube  166  is configured concentrically around an outside of the second end  191  of the fluid tube  165 . In this configuration, the second end  191  of the fluid tube  165  concentrically engages with the delivery inlet  199  by extending into the delivery inlet  199 , whereas the second end  192  of the vapor tube  166  concentrically engages with the delivery inlet  199  by surrounding the delivery inlet  199 . Thus, vapor recovery is inherently built-in to the delivery tube  160 . 
     In an embodiment, the delivery tube  160  further includes a control valve  195 . For example, the control valve  195  may be configured to regulate the flow rate of fluid through the fluid tube  165 . In various embodiments, the control valve may be a ball valve or any other type of fluid flow valve configured to regulate fluid flow. In a related embodiment, the control valve  195  further includes a sensor, configured to monitor the volume of fluid dispensed through the fluid tube  165 , volumetric flow rate, etc. In other examples, the control valve  195  may include alternate or additional features. For example, the control valve  195  may include a shutdown feature, which may be triggered upon detection of a “full” condition at the delivery inlet  199 . In this example, the control valve may communicate with additional sensors positioned, for example, at the second end  191  of the fluid tube  165 . Likewise, for example, the control valve  195  may include a visual indication of fill level (e.g., empty, half-full, full, 25% full, 60% full, 99% full, etc.) via a mechanical gage, electro-mechanical sensor, LCD display, LED display, etc. The control valve  195  may communicate measured information (e.g., volume of fluid dispensed, volumetric flow rate, fill level, etc.) with internal components (e.g., a processor, memory, etc.) and/or external components (e.g., an external network, a user&#39;s cell phone, an automobile, etc.) 
     In another embodiment, the delivery tube  160  may be dimensioned for a desired fluid flow rate. For example, each of the fluid tube  165  and the vapor tube  166  (and the corresponding first inlet  111  and second inlet  112 ) may be configured with appropriate cross-sections, such that fluid will flow, via gravity, through the fluid tube  165  at a desired rate (e.g.,  1  gallon per minute,  2  gallons per minute, etc.). In this way, basic fluid mechanics and delivery requirements may dictate the appropriate dimensioning of the fluid tube  165 , the vapor tube  166 , and the gravity nozzle  150  generally. 
       FIG. 9  illustrates a flowchart of a method of using a gravity nozzle  150 , according to an example embodiment of the present disclosure. The method  900  includes a first step  910  of fastening a threaded container valve  100  to a threaded container  130 . In an example embodiment, the threaded container valve  100  has an inner wall  121  and an outer wall  122 . The inner wall  121  defines a thread profile  125  configured to engage with the threaded container  130 . The threaded container valve  100  additionally has a first inlet  111  and a second inlet  112 . 
     The method  900  includes a second step  920  of affixing a delivery tube  160  to the threaded container valve  100 . In one embodiment, the second step  920  initially requires removing the removable cap from the valve section  110  (as described above with reference to  FIG. 2 ). In an example embodiment, the delivery tube  160  includes a cap section  170  with a notch. The notch is configured to be received by a groove  126  on the outer wall  122  of the threaded container  130 . The delivery tube  160  includes a first end  167  of a fluid tube  165  concentrically engaged with the first inlet  111 . The delivery tube  160  further includes a first end  168  of a vapor tube  166  concentrically engaged with the second inlet  112 . 
     The method  900  includes a third step  930  of affixing the delivery tube  160  to a delivery inlet  199 . In an example embodiment, a second end  192  of the vapor tube  166  is configured concentrically around an outside of a second end  191  of the fluid tube  165 . The second end  191  of the fluid tube  165  concentrically engages with the delivery inlet  199  by extending into the delivery inlet  199 . The second end  192  of the vapor tube  166  concentrically engages with the delivery inlet  199  by surrounding the delivery inlet  199 . 
     The method  900  includes a fourth step  940  of forming a fluid circuit. In an example embodiment, the fluid circuit is formed from the delivery inlet  199 , through the vapor tube  166 , through the second inlet  112 , into the threaded container  130 , through the first inlet  111 , through the fluid tube  165 , and back to the delivery inlet  199 . 
     For example, by implementing the method  900  described above, a courier may form a complete fluid circuit between a first location (e.g., the threaded container  130 ) and a second location (e.g., the delivery inlet  199 ). Through formation of a complete fluid circuit, fluid may be transferred from the first location to the second location with minimal leakage. For example, the threaded container  130  may be inverted, such that the threaded container valve  100  is below a liquid level within the threaded container  130 . Because the threaded container valve  100  forms a seal with the threaded container  130  (as discussed above with respect to  FIG. 3 ) fluid leakage is reduced. Likewise, due to vapor recapture at the second end  192  of the vapor tube  166  (as discussed above with respect to  FIG. 7 ), vapor leakage is reduced. Once the threaded container  130  is inverted, fluid may flow from the threaded container  130 , through the first inlet  111 , and through the fluid tube  165  to the delivery inlet  199 . This assumes that the threaded container  130  is above the vertical location of the delivery inlet (e.g., circumstances facilitating gravity pouring). Likewise, escaping vapor near the delivery inlet  199  may be captured by the vapor tube  166 , and transmitted back to the threaded container  130  through the second inlet  112 . Additionally, beyond vapor recapture, the vapor tube  166  and second inlet  112  allow for pressure balancing within the threaded container valve  130 . For example, the vapor tube  166  and the second inlet  112  improve flow consistency (e.g., laminar flow) of the fluid exiting the first inlet  111 . 
     In a preferred embodiment, the fluid transferred from the first location to the second location is gasoline. For example, the courier, by implementing the method  900  described above, pours gasoline from a portable fuel container (e.g., the threaded container  130 ) to a car&#39;s gas tank (e.g., the delivery inlet  199 ) in a safe and efficient manner. 
     The threaded container valves and gravity nozzles as described herein may be related to additional components for fluid delivery. For example, the threaded container valves and gravity nozzles may be used in tandem with a smart fueling pump/nozzle and system, as illustrated by U.S. patent application Ser. No. 14/852,688, “System and Fuel Nozzle for Vehicle Refueling”, incorporated herein by reference. Likewise, for example, the threaded container valves and gravity nozzles may be used in tandem with additional devices and systems, such as smart fuel caps, vehicle mounted electronic dongles, order fulfillment applications, etc., as illustrated by U.S. patent application Ser. No. 14/731,320, “Device and System for Automotive Refueling”, incorporated herein by reference. Likewise, for example, the threaded container valves and gravity nozzles may be used with a fluid delivery dolly, as illustrated by U.S. patent application Ser. No. 15/162,054, “Fluid Delivery Dolly”, incorporated herein by reference. 
     It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.