Dispensing meter for fluid dispensing

Abstract

A hand-held fluid meter includes a cartridge valve that controls the flow of fluid through the hand-held meter. The cartridge valve includes a valve core and a valve stem disposed within the valve core. The cartridge valve guides the valve stem and provides unique sealing surfaces for the dynamic seal and control seal disposed on the valve stem. The hand-held meter dispenses through a nozzle that includes an overmolded stem tip that creates a laminar fluid flow as the fluid exits the nozzle. The overmolded stem tip is a compliant material. The hand-held fluid meter includes circuitry configured to reverse the orientation of visual output provided by a display of the hand-held fluid meter to facilitate installation of the hand-held fluid meter for use in a fuel island application.

Description

[0001] This application is a divisional application, which is based on the PCT national phase application filed on March 22, 2018, entered into China on January 20, 2020, with application number 201880048747.0 and invention title "Dispensing Meter for Fluid Dispensing".

[0002] Cross-references to related applications

[0003] This application claims priority to U.S. Provisional Application No. 62 / 558,992, filed September 15, 2017, entitled “Dispensing Meter and Cartridge Valve for Fluid Dispensing,” the disclosure of which is hereby incorporated by reference in its entirety. Invention Field

[0004] This disclosure generally relates to fluid dispensing. More specifically, this disclosure relates to dispensing meters. Background Technology

[0005] Automotive fluids, such as antifreeze, transmission fluid, and engine oil, are typically dispensed from large-capacity containers. For example, auto service stations often use handheld meters to dispense small amounts of engine oil from large containers. The handheld meter receives fluid from the large-capacity storage tank and dispenses the desired volume of fluid at the desired location. Users can communicate with a central fluid monitoring computer using the handheld meter's user interface to track and record the volume of fluid dispensed from the large-capacity container. In current handheld meters, the user interface includes buttons raised above the handle, causing users to typically place the meter on the ground before entering information. Additionally, the display screen is susceptible to damage if the handheld meter is dropped or otherwise impacted by an object.

[0006] A valve is located within a handheld metering device and controls the flow of fluid through the device. The valve can be controlled by a trigger. The valve can be: a manual valve, controlled to open and close by a manual trigger; a preset metering valve, which includes a manual trigger but automatically closes after a preset volume of fluid has been dispensed; or a metering valve, where the trigger cannot activate the valve until the handheld metering device receives a dispensing authorization. When the valve is initially activated, a control seal can be displaced into the fluid inlet, where high-speed fluid impacts can cause the control seal to displace and disengage. When the valve is closed, the control seal may experience scarfing when it encounters a sharp edge geometry. Scarfing most commonly occurs when the valve is rapidly adjusted between a slightly open and slightly closed position, such as when the user refills the fluid at the end of a dispensing event. The valve also includes a top dynamic seal that may have slight leakage during the valve's reciprocating motion. Slight leakage may occur due to the rotation of the seal cross-section caused by the valve's reciprocating motion and because the top dynamic seal is constantly subjected to fluid pressure. Additionally, the top dynamic seal contacts the cast housing of the handheld meter and may experience leakage due to the porosity of the cast housing.

[0007] Dynamic pressure can also apply a greater force to the upper part of the valve than to the lower part, which can overcome the spring force that moves the valve to the closed position. Due to the pressure imbalance in the valve chamber, the valve may become stuck in the open position.

[0008] To replace the valve, the trigger is removed from the trigger control mechanism. The electronics housing must be removed to access the trigger mechanism pivot point. This means that the housing and various other components of the handheld meter must be removed before replacing the valve. Additionally, residual oil may remain in the valve chamber during valve replacement. When the valve is reinstalled, this residual oil can migrate through the valve and appear to the user as a new leak even if there is no actual leakage in the valve.

[0009] Fluid is dispensed from a handheld meter through a nozzle. The nozzle includes an acetal seat with a circular steel nozzle rod mounted on it. The nozzle may experience leakage when contaminants are present in the fluid. Additionally, the nozzle may experience fluid splashing and / or flow diffusion at high flow rates, and when the nozzle rod is moved to the closed position, the nozzle may experience potential dripping of fluid retained in the nozzle tip. Summary of the Invention

[0010] According to one aspect of this disclosure, a control valve for a handheld fluid meter includes a valve cartridge and a valve stem disposed within the valve cartridge. The valve cartridge includes: a cartridge body extending between a first end and a second end, having a first circumferential flow channel in the first end and a second circumferential flow channel in the second end; a radial inlet extending through the first end into the first circumferential flow channel; a radial outlet extending through the second end into the second circumferential flow channel; and a control seat disposed around the interior of the valve cartridge body between the first and second circumferential flow channels. The valve stem includes an upper portion disposed within the first end, a lower portion disposed within the second end, an elongated portion extending between the upper and lower portions and connecting the upper and lower portions, and a control seal. The upper portion includes an annular control seal groove. The lower portion includes an actuating tip extending from the second end of the valve cartridge. The control seal is disposed in the control seal groove and configured to engage with the control seat when the valve stem is in the closed position and disengage from the control seat when the valve stem is in the open position.

[0011] According to another aspect of this disclosure, a handheld fluid meter includes: a meter body; a fluid inlet extending into the meter body; a valve chamber extending into the meter body and having a first circumferential flow channel and a second circumferential flow channel; a valve inlet fluidly extending and connecting the fluid inlet to the first circumferential flow channel; a valve outlet extending downstream from the second circumferential flow channel out of the valve chamber; and a valve disposed in the valve chamber. The valve includes a valve core and a valve stem disposed within the valve core. The valve core includes: a valve core body extending between a first end and a second end, having a third circumferential flow channel in the first end and a fourth circumferential flow channel in the second end; a radial inlet extending through the first end; a radial outlet extending through the second end; and a control seat disposed around the interior of the valve core body between the third and fourth circumferential flow channels. The radial inlet extends between the first and third circumferential flow channels. The radial outlet extends between the second circumferential flow channel and the fourth circumferential flow channel. The valve stem includes an upper portion disposed within the first end, a lower portion disposed within the second end, an elongated portion extending between and connecting the upper and lower portions, and a control seal. The upper portion includes an annular control seal groove. The lower portion includes an actuating tip extending from the second end of the valve core. The control seal is disposed in the control seal groove and configured to engage with the control seat when the valve stem is in the closed position and disengage from the control seat when the valve stem is in the open position.

[0012] According to another aspect of this disclosure, the nozzle includes: a connector having a placement end and a connector bore extending through the connector; a nozzle body attached to the connector; and a nozzle rod. The nozzle body includes: a receiving end; a dispensing end disposed opposite to the receiving end and defining a fluid outlet; and a nozzle bore extending through the nozzle body and located between the receiving end and the dispensing end, wherein the placement end extends into the nozzle bore and connects to the receiving end. The fluid outlet includes an upstream portion having a first diameter; a downstream portion having a second diameter smaller than the first diameter; and a connecting portion extending between the upstream portion and the downstream portion and connecting the upstream portion and the downstream portion. The connecting portion is a tapered channel. The nozzle rod is disposed in the nozzle bore and located between the placement end and the fluid outlet. The nozzle rod includes an overmolded tip. The overmolded tip includes a tip cone configured to engage with and seal against the tapered channel when the nozzle rod is in a closed position.

[0013] According to another aspect, the nozzle rod includes: an inlet tube; a rod flange extending radially from the inlet tube; a flange groove extending into an outer edge of the rod flange; at least one flow channel extending downstream of the rod flange through a wall of the inlet tube; and a rod tip extending downstream from the inlet tube. The flange groove is configured to receive a seal. The rod includes a main tip body extending from the inlet tube, a reduced-diameter portion extending from the main tip body, and an overmolded tip seal disposed on the reduced-diameter portion. The overmolded tip seal includes a sealing portion and a tip cone extending from the sealing portion.

[0014] According to another aspect of this disclosure, a handheld fluid meter for use in an oil bar includes: a meter body having a handle, a fluid inlet extending into the handle, and a fluid outlet extending from an end of the meter body opposite to the handle; a trigger configured to be manually shifted to control the flow of fluid between the fluid inlet and the fluid outlet; a bezel housing mounted on the meter body, the bezel housing including a display opening; a display screen fixedly mounted within the display opening; a user input section fixedly mounted on the bezel housing, the user input section including a plurality of buttons; a display circuit configured to provide visual output at the display screen in a plurality of orientations; and a user input circuit configured to receive input from a user via the plurality of buttons. To modify the visual output of the display screen; and a control circuit connected to communicate with the display circuit and the user input circuit, the control circuit being configured to receive input from the user input circuit regarding the desired orientation of the visual output, and to provide instructions to the display circuit to modify the orientation of the visual output.

[0015] According to another aspect of this disclosure, a dispensing assembly for use in a vending machine includes: a handheld fluid meter and a manifold configured to be installed in the vending machine, the manifold including a manifold inlet opening and a manifold outlet opening. The handheld fluid meter includes: a meter body having a handle, a fluid inlet extending into the handle, and a fluid outlet extending from an end of the meter body opposite to the handle; a trigger configured to be manually shifted to control the flow of fluid between the fluid inlet and the fluid outlet; a frame housing mounted on the meter body, the frame housing including a display opening; a display screen fixedly mounted within the display opening; a user input unit fixedly mounted on the frame housing, the user input unit including a plurality of buttons; a display circuit configured to provide visual output at the display screen in a plurality of orientations; a user input circuit configured to receive input from a user via the plurality of buttons to modify the visual output of the display screen; and a control circuit connected to communicate with the display circuit and the user input circuit, the control circuit being configured to receive input from the user input circuit regarding the desired orientation of the visual output and to provide instructions to the display circuit to modify the orientation of the visual output. The handheld fluid meter is mounted on the manifold such that the handle extends vertically above the display.

[0016] According to another aspect of this disclosure, a vending machine assembly includes: a frame having a first side support member, a second side support member, and a rear panel extending between and connecting the first and second side support members; and a front panel extending between and attached to the first and second side support members, wherein the front and rear panels define a manifold, and wherein a dispenser opening extends through the front panel, and a dispensing assembly is mounted to the front panel. The dispensing assembly includes a handheld fluid meter and a manifold having a manifold inlet opening and a manifold outlet opening, the manifold being disposed within the manifold and attached to the front panel. The dispensing assembly further includes: an outlet connector; a manifold inlet adapter that extends between the outlet connector and the manifold inlet opening and connects the outlet connector and the manifold inlet opening; a manifold outlet adapter that extends through the dispenser opening and connects to the manifold outlet opening; a swivel elbow that connects to the manifold outlet adapter; and a nozzle that connects to the swivel elbow. The handheld fluid meter includes: a meter body having a handle, a fluid inlet extending into the handle, and a fluid outlet extending from an end of the meter body opposite to the handle; a trigger configured to be manually shifted to control the flow of fluid between the fluid inlet and the fluid outlet; a frame housing mounted on the meter body, the frame housing including a display opening; a display screen fixedly mounted within the display opening; a user input unit fixedly mounted on the frame housing, the user input unit including a plurality of buttons; a display circuit configured to provide visual output at the display screen in a plurality of orientations; a user input circuit configured to receive input from a user via the plurality of buttons to modify the visual output of the display screen; and a control circuit connected to communicate with the display circuit and the user input circuit, the control circuit being configured to receive input from the user input circuit regarding a desired orientation of the visual output and to provide instructions to the display circuit to modify the orientation of the visual output. Attached Figure Description

[0017] Figure 1A This is an isometric view of a handheld measuring instrument.

[0018] Figure 1BThis is a simplified block diagram of the electronic components of a handheld measuring instrument.

[0019] Figure 2A This is a side elevation view of the main body of the dispensing meter.

[0020] Figure 2B yes Figure 2A A cross-sectional view of the main body of the measuring instrument.

[0021] Figure 3A This is a cross-sectional view of the valve in the closed position.

[0022] Figure 3B This is a cross-sectional view of the valve in the adjusted position.

[0023] Figure 3C This is a cross-sectional view of the valve in the open position.

[0024] Figure 3D This is a cross-sectional perspective view of a valve showing the fluid flow path.

[0025] Figure 4A This is a cross-sectional view showing a cartridge valve with its control seal in the closed position.

[0026] Figure 4B This is a cross-sectional view showing a cartridge valve with a control seal in the adjusted position.

[0027] Figure 4C This is a cross-sectional view of the groove controlling the seal.

[0028] Figure 5A This is a first cross-sectional view of the valve core.

[0029] Figure 5B This is a second cross-sectional view of the valve core.

[0030] Figure 6A It is an enlarged cross-sectional view of the bezel housing and the display.

[0031] Figure 7A It is along Figure 1A The nozzle is shown in a cross-sectional view taken from line 7-7.

[0032] Figure 7B This shows the nozzle in the open position. Figure 7A A magnified view of the details in Z.

[0033] Figure 7C This is an enlarged cross-sectional view showing the nozzle in the closed position.

[0034] Figure 8A This is an isometric view of the oil vending machine.

[0035] Figure 8B This is an exploded view of the dispensing components used at the oil vending machine.

[0036] Figure 8C This is a simplified block diagram of the meter controller.

[0037] Figure 8D This is a simplified block diagram of another meter controller. Detailed Implementation

[0038] Figure 1A This is an isometric view of the handheld measuring instrument 10. Figure 1B This is a simplified schematic block diagram of the electronic components of the handheld measuring device 10. They will be discussed together. Figure 1A and Figure 1B The handheld measuring device 10 includes a measuring device body 12 ( Figure 1A ), extension 14 ( Figure 1A ), Nozzle 16 ( Figure 1A ), trigger 18 ( Figure 1A ), frame housing 20 ( Figure 1A ), Elastomer trigger protection device 22 ( Figure 1A ), Meter controller 24 ( Figure 1B ), sensor 26 (Figure 1B), user interface 28 and trigger control mechanism 30 ( Figure 1B The measuring instrument body 12 includes a handle 32. Figure 1A ), Integrated trigger protection device 34 ( Figure 1A ), fluid inlet 36 ( Figure 1A ) and fluid outlet 38 ( Figure 1A The meter controller 24 includes a memory 40. Figure 1B ) and control circuit 42 ( Figure 1B The user interface 28 includes an input section 44 (Figure 1A) and a display 46 (Figure 1A). Figure 1A The handheld meter 10 is a meter for use in systems used to dispense and track fluids. For example, a fluid dispensing system can be implemented in an auto shop to track oil, automotive transmission fluid, coolant, and other high-volume dispensing fluids.

[0039] Fluid inlet 36 leads to handle 32 and is configured to connect to a supply line to receive fluid from the storage container. Fluid outlet 38 is located within an internal valve (e.g., valve 50, see preferred). Figure 3A arrive Figure 3CThe downstream extension of the meter body 12 and other metering components extends through the meter body 12. Fluid outlet 38 provides an outlet for the fluid leaving the meter body 12. Extension 14 is connected to fluid outlet 38, and nozzle 16 is mounted on the end of extension 14 opposite to fluid outlet 38. Fluid exits the handheld meter 10 through nozzle 16.

[0040] A frame housing 20 is mounted on the meter body 12. The frame housing 20 surrounds and supports various electronic components of the handheld meter 10, such as the meter controller 24, user interface 28, and trigger control mechanism 30. The meter controller 24 is disposed within the frame housing 20 and includes a memory 40 and control circuitry 42. The memory 40 stores software that, when executed by the control circuitry 42, authorizes fluid dispensing, tracks and records the volume of each fluid dispensing, and transmits fluid dispensing information to and from the user. The user interface 28 is disposed on and within the frame housing 20 and is configured to receive input from and provide output to the user. An input section 44 is disposed on the frame housing 20 aligned with the handle 32. The input section 44 is slightly raised relative to the handle 32 and positioned in a convenient, ergonomic location so that the user can utilize the input section 44 with the aid of their thumb while gripping the handle 32 of the handheld meter 10. Input unit 44 includes a button pad, but it should be understood that input unit 44 can be any suitable configuration for receiving information from the user, such as a touchscreen. Display 46 provides visual information to the user. For example, display 46 can be a liquid crystal display (“LCD”) for providing visual information to the user. Display 46 is oriented such that display 46 is tilted toward handle 32, which positions the display perpendicular to the user's viewing angle, thereby providing the user with an ergonomic viewing angle.

[0041] In one example, control circuitry 42 is configured to implement functionality and / or process instructions. For example, control circuitry 42 may be able to process instructions stored in memory 40. Examples of control circuitry 42 may include any one or more of a microprocessor, controller, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other equivalent discrete or integrated logic circuitry.

[0042] In some examples, memory 40 may be configured to store information during operation. In some examples, memory 40 is described as a computer-readable storage medium. In some examples, the computer-readable storage medium may include a non-transitory medium. The term "non-transitory" may indicate that the storage medium is not embodied in a carrier wave or propagating signal. In some examples, memory 40 is temporary memory, meaning that the primary purpose of memory 40 is not long-term storage. In some examples, memory 40 is described as volatile memory, meaning that memory 40 does not retain its stored contents when the power to the handheld meter 10 is turned off. In some examples, memory 40 also includes one or more computer-readable storage media. Memory 40 may be configured to store a larger amount of information than volatile memory. Memory 40 may be further configured for long-term storage of information. In some examples, memory 40 includes non-volatile storage elements.

[0043] Trigger 18 extends from meter body 12 and interfaces with a valve disposed within meter body 12. A user pulls trigger 18 to move the valve to the open position, thereby opening a fluid flow path through meter body 12 between fluid inlet 36 and fluid outlet 38. An integrated trigger guard 34 is integral with meter body 12 and surrounds trigger 18. Thus, the integrated trigger guard 34 can be metallic and identical to meter body 12. A resilient trigger guard 22 is mounted to the integrated trigger guard 34 and surrounds the pivot point where trigger 18 connects to trigger control mechanism 30. The resilient trigger guard 22 is configured to prevent any clamping or entanglement at the pivot point.

[0044] During operation, the user grips handle 32 to control the position of the handheld meter 10 and to control the dispensing from it. The user can input information into the handheld meter 10 via input unit 44. In some examples, the meter controller 24 communicates wirelessly with the system controller. The meter controller 24 can receive dispensing commands and, based on these commands, can authorize dispensing events. When a dispensing event is authorized, the meter controller 24 communicates with trigger control mechanism 30, allowing trigger 18 to shift the valve to the open position. With the valve in the open position, the metered fluid flows through the handheld fluid meter 10 from fluid inlet 36 to fluid outlet 38, and then downstream through extension 14 to nozzle 16. The metered fluid is dispensed through nozzle 16. As the metered fluid flows through the meter body 12, sensor 26 provides a measurement of the volumetric flow of the fluid to the meter controller 24. In some examples, sensor 26 is a reed switch configured to sense the rotation of a metering gear in the fluid flow path between fluid inlet 36 and fluid outlet 38. When the volume flow reaches the authorized volume, the meter controller 24 can deactivate the trigger control mechanism 30, so that the trigger 18 is no longer able to shift and / or hold the valve in the open position.

[0045] Figure 2A This is a side elevation view of the handheld measuring device 10. Figure 2B This is a cross-sectional view of the handheld measuring device 10. It will be discussed together. Figure 2A-2B The handheld meter 10 includes a meter body 12, a trigger 18, a frame housing 20, a spring trigger protection device 22 (Figure 2B), and a sensor 26. Figure 2B User Interface 28 Figure 2B ), trigger control mechanism 30 ( Figure 2B ), handle 32, measuring instrument 48 ( Figure 2B ), Valve 50 ( Figure 2B ), First circuit board 52 ( Figure 2B ), second circuit board 54 ( Figure 2B ) and antenna 56 ( Figure 2B The meter body 12 includes an integrated trigger protection device 34, a fluid inlet 36, a fluid outlet 38, and a metering chamber 58. Figure 2B ), Valve inlet port 60 ( Figure 2B ), valve outlet port 62 (Figure 2B) and valve chamber 64 ( Figure 2B User interface 28 includes input section 44. Figure 2B ) and monitor 46 ( Figure 2B Valve 50 includes valve stem 66. Figure 2B ), Valve core 68 ( Figure 2B), valve cap 70 ( Figure 2B ) and valve spring 72 ( Figure 2B Valve stem 66 includes stem bore 74. Figure 2B ) and actuation tip 76 ( Figure 2B Valve core 68 includes valve core body 77. Figure 2B ), and the valve core body 77 includes a first end 78 ( Figure 2B ), second end 80 ( Figure 2B ), radial inlet 82 ( Figure 2B ) and radial outlet 84 ( Figure 2B The trigger control mechanism 30 includes a solenoid 86. Figure 2B ), Unlocking lever 88 ( Figure 2B ), return spring 90 ( Figure 2B ), Ball 92 ( Figure 2B ), trigger pin 94 and plunger pin 96 ( Figure 2B ).

[0046] The handle 32 is configured for single-handed grip by the user. A trigger 18 is located below the handle 32 and configured to be pulled by the user to initiate event distribution. An integrated trigger guard 34 is integral with the meter body 12 and surrounds the trigger 18. A resilient trigger guard 22 is attached to the integrated trigger guard 34 by fastener 98 and two additional fasteners (not shown) extending into the meter body 12 at position 99. The resilient trigger guard 22 surrounds the pivot point between the trigger 18 and the trigger control mechanism 30. A frame housing 20 is mounted on the meter body 12 and is configured to surround the various electronic components of the handheld meter 10. The frame housing 20 can be made of any suitable material (e.g., plastic).

[0047] A trigger control mechanism 30 is attached to the meter body 12 and extends partially into the frame housing 20. The trigger control mechanism 30 is configured to control the trigger 18 between an active state in which the trigger 18 can actuate the valve 50 to the open position and a deactivated state in which the trigger 18 cannot actuate the valve 50. A solenoid valve 86 is connected to the meter body 12. A release lever 88 interfaces with a solenoid 86 and extends between the solenoid 86 and the trigger 18. A ball 92 is disposed in the release lever 88. A plunger pin 96 extends from the solenoid 86 and is configured to interface with the ball 92 to lock the release lever 88 in the active state. The release lever 88 is connected to the trigger 18 via a trigger pin 94. A return spring 90 is disposed around the release lever 88 and is configured to drive the release lever 88 toward the solenoid 86 to return the release lever 88, and thus return the trigger 18 to the deactivated position, making the release lever 88 ready to engage for the next dispensing event.

[0048] Fluid inlet 36 extends into the handle 32 of the handheld fluid meter 48. Fluid inlet 36 is configured to connect to a supply line to receive fluid from a storage container via the supply line. Fluid inlet 36 extends through handle 32 into metering chamber 58. Metering chamber 58 is disposed within meter body 12 between fluid inlet 36 and valve inlet port 60. Meter 48 is disposed within metering chamber 58. In some examples, meter 48 is a positive displacement meter, such as a gear meter.

[0049] A valve chamber 64 is disposed within the metering body 12. A valve inlet 60 extends through the metering body 12 and is located between the metering chamber 58 and the valve chamber 64. A valve outlet port 62 extends out of the valve chamber 64 and reaches the fluid outlet 38. A valve 50 is disposed within the valve chamber 64 and controls the flow of fluid through the valve chamber 64 between the valve inlet port 60 and the valve outlet port 62.

[0050] A valve core 68 is disposed within a valve cavity 64. A radial inlet 82 extends through a first end 78 of the valve core body 77 near the valve inlet port 60. The radial inlet 82 is circumferentially disposed around the valve core body 77 and provides a flow path for the metered fluid to flow into the valve core 68 from the fluid inlet 36. A radial outlet 84 extends through a second end 80 of the valve core body 77 near the valve outlet port 62. The radial outlet 84 is circumferentially disposed around the valve core body 77 and provides a flow path for the metered fluid to flow out of the valve core 68 to the fluid outlet 38. A valve cap 70 is attached to the first end 78 of the valve core 68 and is configured to prevent the metered fluid from entering the valve core 68 through the first end 78.

[0051] A valve stem 66 is disposed within a valve core 68. The valve stem 66 is movable between an open position and a closed position. In the open position, the metered fluid can flow through valve 50 from valve inlet port 60 to valve outlet port 62; in the closed position, it prevents the metered fluid from flowing through valve 50 from valve inlet port 60 to valve outlet port 62. An actuation tip 76 extends out of valve cavity 64 and a second end 80 of valve core 68 and abuts trigger 18. A rod orifice 74 extends through the valve stem 66 and actuation tip 76 and is exposed to the atmosphere. As the valve stem 66 shifts between the open and closed positions, the rod orifice 74 provides a path for air to flow into and out of valve core 68, thereby preventing undesirable pressurization within valve core 68. Additionally, the rod orifice 74 provides a leakage path for the metered fluid to flow out of valve 50 and provides a visual indication of leakage between valve stem 66 and valve core 68. A valve spring 72 extends from valve cap 70 into the rod orifice 74 of valve stem 66. The valve spring 72 is configured to apply force to the valve stem 66 to return the valve stem 66 to the closed position.

[0052] Sensor 26 is directly positioned above and adjacent to meter 48. Sensor 26 can be any suitable sensor for determining the volumetric flow of fluid through metering chamber 58. For example, sensor 26 can be a reed switch. In the case of a reed switch, sensor 26 interfaces with meter 48 to calculate gear rotation, which provides a volumetric count of fluid flowing through meter 48. Input unit 44 is located on the frame housing 20 above sensor 26. Input unit 44 is configured to receive commands from the user and provide those commands to meter controller 24. Figure 1B The second circuit board 54 is associated with the input section 44 and the sensor 26, and provides electrical and communication connections for the input section 44 and the sensor 26. In some examples, the second circuit board 54 is attached to the frame housing 20. Integrating both the input section 44 and the sensor 26 into a common second circuit board 54 allows the input section 44 to be positioned on a portion of the frame housing 20, which is located below the rest of the frame housing 20. As discussed above, the input section 44 is positioned aligned with the handle 32 and at approximately the same height because the handle 32 provides enhanced comfort and ergonomics for the user. Thus, the aligned input section 44 provides comfortable access to the user when the user grips the handle 32 with one hand. Furthermore, the height of the input section 44 reduces strain on the user's hand and thumb and reduces the hand movements required to manipulate the input section 44.

[0053] The display 46 is supported by the bezel housing 20. The display 46 provides the user with visual information about fluid dispensing and the handheld meter 10. The display 46 is tilted towards the handle 32 to provide the user with an ergonomic viewing angle. Figure 2B As shown, the display 46 is positioned at an angle α relative to the handle 32. Angle α can be any desired angle such that, for example, when angle α is between 90 and 180 degrees, the display 46 is not oriented away from the user or downward toward the handle 32. In some examples, angle α is between 150 and 170 degrees. Antenna 56 is disposed within the bezel housing 20 and configured to provide wireless communication capability to the handheld meter 10, allowing the handheld meter 10 to communicate with other components within the fluid management system. A first circuit board 52 is mounted within the bezel housing between the meter body 12 and the user interface 28. A meter controller (e.g., meter controller 24) may be disposed on the first circuit board 52, a second circuit board 54, or both.

[0054] A dispensing event begins when the handheld meter 10 receives a dispensing command from the user or from the fluid management system. The dispensing command can be provided wirelessly to the handheld meter 10 via antenna 56 and / or by the user via input 44. In some examples, the dispensing command may include a desired volume count, which is the volume of fluid to be dispensed during the dispensing event. Based on the dispensing command, the meter controller activates the trigger control mechanism 30. In the activated position, the solenoid 86 displaces the plunger pin 96 into the release lever 88. The plunger pin 96 causes the ball 92 to engage with the meter body 12, thereby locking the release lever 88 in place. Figure 2B In the position shown. With the release lever 88 locked in the proper position, the trigger 18 pivots about the trigger pin 94. Therefore, pressing the trigger 18 causes the valve stem 66 to move upward within the valve core 68 to the open position, thereby opening the flow path through the valve 50.

[0055] The fluid being measured enters the handheld meter 10 through fluid inlet 36, flows through metering chamber 58, and flows into valve inlet port 60. In an example where meter 48 is a gear meter, the flow of the fluid being measured causes the gears of meter 48 to rotate, and sensor 26 calculates the rotation of the gears. Because the volume of fluid flowing through the gears with each rotation is known, the meter controller can generate a volume count based on the information provided by sensor 26. The meter controller tracks the volume count and, in some examples, is configured to deactivate trigger control mechanism 30 when the actual volume count provided by sensor 26 reaches a desired volume count. The meter controller can provide the user with information about the assigned event via display 46.

[0056] The metered fluid flows into the valve chamber 64 from the valve inlet port 60. The fluid enters the valve core 68 through the radial inlet 82, flows around the valve stem 66, and exits the valve core 68 through the radial outlet 84. The metered fluid exits the valve chamber 64 through the valve outlet port 62 and flows downstream out of the metering body 12 through the fluid outlet 38.

[0057] When the volume count reaches the desired volume count, the meter controller deactivates the trigger control mechanism 30 to prevent any additional unauthorized fluid dispensing. The solenoid 86 retracts the plunger pin 96, thereby unlocking the release lever 88, allowing it to slide freely within the meter body 12. The return spring 90 applies an upward force to the release lever 88, which helps the solenoid 86 remove the plunger pin 96 from the release lever 88. In some examples, the return spring 90 is preloaded to reduce the force required for the solenoid 86 to retract the plunger pin 96. In some examples, the return spring 90 has a preload of approximately 10N to 15N. In one example, the return spring 90 has a preload of approximately 12.8N. With the release lever 88 unlocked, the trigger 18 no longer pivots about the trigger pin 94. Instead, pressing the trigger 18 causes it to pull the release lever 88 downwards within the meter body 12, and the trigger 18 pivots about the actuation tip 76. Shifting the pivot point of trigger 18 from trigger pin 94 to actuation tip 76 prevents trigger 18 from applying the necessary force to valve stem 66 to move valve stem 66 from the closed position to the open position.

[0058] When valve 50 is to be replaced, trigger 18 must be removed from meter body 12 before replacing valve 50. Resilient trigger guard 22 facilitates quick and easy removal and replacement of valve 50. To replace valve 50, remove fastener 98 and pull resilient trigger guard 22 from meter body 12. With resilient trigger guard 22 removed, trigger pin 94 is exposed to the user. The user can knock out trigger pin 94, so that trigger 18 is no longer attached to release lever 88. With trigger pin 94 removed, trigger 18 can then be pulled out of meter body 12. The user can then access valve 50 and remove and replace it. During valve 50 replacement, the user typically positions meter body 12 in an inverted orientation to allow access to valve 50. With meter body 12 in an inverted orientation, the metered fluid can collect in valve chamber 64. When valve 50 is installed for replacement, valve cap 70 prevents the metered fluid from entering the first end 78 of valve core 68. If the metered fluid were to enter the first end 78 of the valve core 68, it could migrate through the rod hole 74 and leak out from the actuation tip 76, providing a false positive indication of leakage to the user even if no leakage exists. The valve cap 70 prevents the collected metered fluid from entering the first end 78 of the valve core 68, and thus eliminates false positive leakage indications that may occur during valve 50 replacement.

[0059] Figure 3A This is a cross-sectional view of valve 50 in the closed position. Figure 3BThis is a cross-sectional view of valve 50 in the throttling position. Figure 3C This is a cross-sectional view of valve 50 in the open position. Figure 3D This is a cross-sectional perspective view showing valve 50 of flow line F. It will be discussed together. Figures 3A to 3D . Figures 3A to 3C The diagram shows the valve inlet port 60, valve outlet port 62, and valve chamber 64 of the meter body 12. The valve chamber 64 includes a first external circumferential flow channel 100 and a second external circumferential flow channel 102. The valve 50 includes a valve stem 66, a valve core 68, a valve cap 70, a valve spring 72, a first dynamic seal 104, a second dynamic seal 106, a control seal 108, a static seal 110, a static seal 112, and a valve cap seal 114. The first dynamic seal 104 includes a protrusion 105. The valve stem 66 includes a rod hole 74, an actuation tip 76, an upper portion 116, a lower portion 118, and an elongated portion 120. The upper portion 116 includes a first dynamic seal groove 122 and a control seal groove 124, and has a diameter D1. The lower portion 118 includes a second dynamic seal groove 126 and has a diameter D2. The valve core 68 includes a valve core body 77, and the valve core body 77 includes a first end 78, a second end 80, a radial inlet 82, a radial outlet 84, a control seat 128, a static seal groove 130, a first internal circumferential flow channel 132, and a second internal circumferential flow channel 134. The valve cap 70 includes a valve cap seal groove 136.

[0060] A valve inlet port 60 extends through the meter body 12 into the valve cavity 64. A valve outlet port 62 extends from the valve cavity 64 through the meter body 12. A first external circumferential flow channel 100 extends around the valve cavity 64 near the valve inlet port 60. A second external circumferential flow channel 102 extends around the valve cavity 64 near the valve outlet port 62. A valve 50 is disposed within the valve cavity 64.

[0061] A valve core 68 extends into a valve cavity 64. In some examples, the valve core 68 is machined from bar stock (e.g., steel bar stock). A first internal circumferential flow channel 132 extends around the interior of a first end 78 of the valve core body 77. A radial inlet 82 extends through the first end 78 of the valve core body 77 between a first external circumferential flow channel 100 and a first internal circumferential flow channel 132. A second internal circumferential flow channel 134 extends around the interior of a second end 80 of the valve core body 77. A radial outlet 84 extends through the second end 80 of the valve core body 77 between a second external circumferential flow channel 102 and a second internal circumferential flow channel 134. In some examples, the valve core 68 includes a plurality of radial inlets 82 and radial outlets 84, each extending circumferentially around the valve core 68. In one example, the valve core 68 includes six radial inlets 82 and six radial outlets 84; however, it should be understood that the valve core 68 may include as many or as few radial inlets 82 and radial outlets 84 as needed. The control seat 128 is an annular protrusion extending from the interior of the valve core body 77. The control seat 128 is disposed between the first internal circumferential flow channel 132 and the second internal circumferential flow channel 134. The control seat 128 provides a placement position for the control seal 108 to abut against the seal when the valve 50 is in the closed position.

[0062] A static seal recess 130 extends around the exterior of the valve core body 77 between a first end 78 and a second end 80. A static seal 110 is disposed within the static seal recess. The static seal 110 prevents leakage of the metered fluid around the valve core body 77 between a first external circumferential flow passage 100 and a second external circumferential flow passage 102. A second end 80 of the valve core 68 is connected to the metering body 12 to secure the valve core 68 within the valve cavity 64. In some examples, the second end 80 includes external threads configured to mate with internal threads of the metering body 12. Although the valve core 68 is described as being connected to the metering body 12 via an interfacing thread, it should be understood that the valve core 68 can be secured to the metering body 12 in any suitable manner (e.g., snap-fit ​​connection). The static seal 112 extends around the second end 80 between the valve core 68 and the metering body 12. The static seal 112 prevents leakage of the metered fluid from the valve cavity 64 surrounding the second end 80.

[0063] A valve stem 66 is disposed within a valve core 68. An upper portion 116 is disposed within a first end 78, and a lower portion 118 is disposed within a second end 80. An elongated portion 120 extends between the upper portion 116 and the lower portion 118, connecting the upper portion 116 and the lower portion 118. An actuation tip 76 extends from the lower portion 118 out of the second end 80. A rod hole 74 extends through the upper portion 116, the elongated portion 120, the lower portion 118, and the actuation tip 76; and the rod hole 74 opens to the atmosphere. The upper portion 116 has a first diameter D1, and the lower portion 118 has a second diameter D2. The first diameter D1 and the second diameter D2 are the same, such that the pressure exerted by the metered fluid on both the upper portion 116 and the lower portion 118 is balanced.

[0064] A first dynamic seal groove 122 extends around the upper portion 116. A first dynamic seal 104 is disposed in the first dynamic seal groove 122 and configured to provide a seal between the upper portion 116 and the valve body 77. The first dynamic seal groove 122 is disposed above the first internal circumferential flow channel 132, and the first dynamic seal 104 maintains engagement with the valve body 77 when the valve stem 66 is in the open position, the closed position, and any intermediate position therein. The first dynamic seal 104 includes a protrusion 105 extending from the first dynamic seal 104 and contacting the valve body 77. The protrusion 105 provides increased resistance to rolling deformation of the first dynamic seal 104. The reduction in rolling deformation during the reciprocating motion of the valve stem 66 within the valve body 68 prevents operational leakage around the first dynamic seal 104.

[0065] The second dynamic seal groove 126 extends around the lower portion 118. A second dynamic seal 106 is disposed in the second dynamic seal groove 126 and configured to provide a seal between the lower portion 118 and the valve body 77. The second dynamic seal 106 is disposed below the second internal circumferential flow channel 134. When the valve stem 66 is in the open position, the closed position, or any intermediate position in between, the second dynamic seal 106 maintains engagement with the valve body 77. In some examples, the second dynamic seal 126 is configured similarly to the first dynamic seal 122, such that the second dynamic seal 126 also includes a protrusion (e.g., protrusion 105) to increase resistance to rolling deformation.

[0066] A control seal recess 124 extends around an upper portion 116 below a first dynamic seal recess 122. A control seal 108 is disposed in the control seal recess 124 and configured to provide a seal between the valve stem 66 and the valve core 68. The control seal 108 is configured to control the flow of the metered fluid through the valve 50. When the valve 50 is in the closed position, the control seal 108 engages the control seat 128, thereby preventing flow between the first internal circumferential flow channel 132 and the second internal circumferential flow channel 134. When the valve 50 is in the open position, the control seal 108 disengages from the control seat 128, thereby allowing flow between the first internal circumferential flow channel 132 and the second internal circumferential flow channel 134. In some examples, the control seal 108 is an O-ring.

[0067] Valve cap 70 is connected to the first end 78 of valve core 68. A valve cap seal groove 136 extends around valve cap 70. Valve cap seal 114 is disposed in valve cap seal groove 136 and configured to provide a seal between valve cap 70 and valve core 68. Valve cap seal 114 prevents fluid from leaking from fluid inlet 60 into valve passage 74 and into the first end 78 of valve core 68 surrounding valve cap 70. As discussed above, valve cap 70 prevents any accumulated metered fluid within valve cavity 64 from entering valve core 68 through the first end 78 during valve 50 replacement. Thus, valve cap 70 eliminates false positives of leakage that may occur during valve 50 replacement.

[0068] Valve spring 72 extends from valve cap 70 and into stem bore 74. Valve spring 72 applies a force to valve stem 66 to bias valve stem 66 toward the closed position.

[0069] During operation, valve 50 is as follows: Figure 3A The closing position shown is similar to... Figure 3C The opening position shown is adjusted between the positions indicated. Valve stem 66 is initially in... Figure 3A In the closed position shown. With valve stem 66 in the closed position, control seal 108 engages control seat 128 and prevents the metered fluid from flowing through valve 50. When valve stem 66 is in the closed position, both the first dynamic seal 104 and control seal 108 are subjected to fluid pressure upstream of valve 50. With valve stem 66 in the closed position, second dynamic seal 106 is isolated from upstream fluid pressure, such that when valve stem 66 is in the closed position, second dynamic seal 106 is not subjected to upstream fluid pressure.

[0070] When the assignment event begins, the trigger is pressed (e.g., trigger 18 (see best). Figures 2A to 2B This causes the valve stem 66 to move upward within the valve core 68. The valve stem 66 initially moves to... Figure 3B The throttling position is shown. When the valve stem 66 is in the throttling position, the control seal 108 disengages from the control seat 128 and is positioned in the flow path of the fluid entering the valve core 68 through the radial inlet 82. See below for reference. Figures 4A to 4C In more detail, when the valve stem 66 is in the throttling position, the restricted flow path opens between the upper portion 116 and the valve core 68. The restricted flow path limits the velocity of the metered fluid flowing through the valve 50 and impacting the control seal 108. When the control seal 108 is directly in the fluid flow path through the radial inlet 82, limiting the fluid velocity prevents the metered fluid from displacing the control seal 108 out of the control seal recess 124.

[0071] Valve stem 66 continues to move upward within valve core 68 until... Figure 3C The fully open position is shown. In the fully open position, the control seal 108 is offset from and positioned above the radial inlet 82, such that a portion of the valve core 68 shields the control seal 108 from the direct flow path of the metered fluid. The valve core 68 shields the control seal 108 from the full fluid velocity, preventing the control seal 108 from undesirably shifting out of the control seal recess 124.

[0072] The metered fluid enters the first external circumferential flow channel 100 from the valve inlet port 60 and flows circumferentially around the first end 78 of the valve core body 77 within the first external circumferential flow channel 100. The metered fluid flows into the first internal circumferential flow channel 132 through the radial inlet 82. Figure 3D As shown, the first outer circumferential flow channel 100 ensures balanced circumferential flow around the first end 78 of the valve core body 77, and the first inner circumferential flow channel 132 ensures balanced circumferential flow around the valve stem 66. Ensuring balanced circumferential flow provides a uniform pressure distribution around the control seal 108. Thus, regardless of the angular position of the flow on the control seal 108, the control seal 108 experiences a similar flow velocity. The first outer circumferential flow channel 100 and the first inner circumferential flow channel 132 therefore allow for consistent external pressure on the control seal 108, thereby preventing the control seal 108 from shifting out of the control seal recess 124.

[0073] The metered fluid flows downstream from the first internal circumferential flow channel 132 to the second internal circumferential flow channel 134. The metered fluid flows from the second internal circumferential flow channel 134 to the second external circumferential flow channel 102 through the radial outlet 84, and exits the second external circumferential flow channel 102 through the valve outlet port 62. Similar to the first external circumferential flow channel 100 and the first internal circumferential flow channel 132, the second external circumferential flow channel 102 and the second internal circumferential flow channel 134 provide a uniform distribution of flow through the valve 50, thereby providing balanced pressure and flow rate.

[0074] The first external circumferential flow channel 100, the first internal circumferential flow channel 132, the second internal circumferential flow channel 134, and the second external circumferential flow channel 102 thus provide a uniform annular distribution of the fluid flow path F through the valve 50, such that the metered fluid flows around the entire circumference of the valve cavity 64 and the valve core 68, rather than flowing through a direct path connecting the valve inlet port 60 and the valve outlet port 62.

[0075] With valve stem 66 in the fully open position, both the first dynamic seal 104 and the second dynamic seal 106 experience the fluid pressure of the metered fluid. After fluid dispensing is complete, valve stem 66 shifts back to its original position. Figure 3A The closed position is shown in the diagram. Valve spring 72 applies a downward force to valve stem 66 to drive it to the closed position. The upper diameter D1 is the same as the lower diameter D2, such that the fluid pressure acting on the first dynamic seal 104 and the upper portion 116 is balanced with the fluid pressure acting on the second dynamic seal 106 and the lower portion 118. Balancing the pressures on the first dynamic seal 104 and the second dynamic seal 106 creates pressure equilibrium, thereby eliminating pressure imbalance on valve stem 66. This balanced pressure ensures that valve spring 72 can move valve stem 66 to the closed position under all rated operating conditions.

[0076] Throughout operation, the valve stem 66 is held within and guided by the valve core body 77. The first dynamic seal 104, the control seal 108, and the second dynamic seal 106 are all configured to extend between the valve stem 66 and the valve core 68. Since the valve stem 66 is not guided by multiple components with multiple diameters, guiding the valve stem 66 by means of the valve core body 77 provides enhanced sealing alignment. Additionally, sealing the first dynamic seal 104 onto the bar-machined valve core 68 prevents operational leakage around the first dynamic seal 104, as the first dynamic seal 104 does not seal against cast components (e.g., the meter body 12).

[0077] Valve 50 offers significant advantages. The fluid velocity through valve 50 is maintained below its maximum level until the control seal 108 leaves the direct flow path of the metered fluid, thus preventing undesirable displacement of the control seal 108 from the control seal recess 124. The first outer circumferential flow channel 100, the first inner circumferential flow channel 132, the second inner circumferential flow channel 134, and the second outer circumferential flow channel 102 ensure that the metered fluid flows circumferentially around the valve core 68 and the valve stem 66, thereby providing a balanced force on the control seal 108 regardless of angular position. The protrusion 105 extends from the first dynamic seal 104 and reduces rotational deflection, which reduces operational leakage around the first dynamic seal 104. The valve cap 70 prevents fluid from entering the valve core 68 through the first end 78, eliminating false positive leakage indications during valve 50 replacement. The upper diameter D1 is equal to the lower diameter D2, ensuring that the pressure on the first dynamic seal 104 and the second dynamic seal 106 is balanced when the valve 50 is in the open position. This balancing force ensures that the valve spring 72 can drive the valve stem 66 to the closed position under all rated operating conditions. The valve body 77 provides a single sealing surface for the first dynamic seal 104, the control seal 108, and the second dynamic seal 106, resulting in better seal alignment due to the valve stem 66 being guided by a single component.

[0078] Figure 4A This is an enlarged cross-sectional view of the control seal 108 with valve 50 in the closed position. Figure 4B This is an enlarged cross-sectional view of the control seal 108 with valve 50 in the adjusting position. Figure 4C This is a cross-sectional view of the control seal groove 124. It will be discussed together. Figures 4A to 4C The valve inlet port 60 and valve chamber 64 of the meter body 12 are shown. A first external circumferential flow passage 100 and a second external circumferential flow passage 102 of the valve chamber 64 are shown. The valve stem 66, valve core 68, valve spring 72, control seal 108, and static seal 110 of the valve 50 are shown. The upper portion 116 and the elongated portion 120 of the valve stem 66 are shown. Figure 4B The upper portion 116 includes a control seal recess 124 and a throttling portion 138. The control seal recess 124 includes a dovetail portion 140, and the dovetail portion 140 has a width W1. Figure 4C The radial inlet 82 and radial outlet 84 of the valve core 68 are shown. Figure 4B The control seat 128 includes a static sealing groove 130, a first internal circumferential flow channel 132, and a second internal circumferential flow channel 134. The control seat 128 includes a seat radius R.

[0079] A valve stem 66 is disposed within a valve core 68 and is movable between an open and a closed position. A control seal recess 124 extends into an upper portion 116, and a control seal 108 is disposed within the control seal recess 124. A dovetail 140 extends from the downstream side of the control seal recess 124, such that the control seal recess 124 presents a partial dovetail shape. Width W1 is the width of the control seal recess 124 at the dovetail 140. Width W1 is preferably about 0.178 cm (0.070 inches), and in one example, it is approximately the same as the cross-sectional diameter of the control seal 108. In some examples, the ratio of the cross-sectional diameter of the control seal 108 to width W1 is between about 1:0.9 and 1:1.1. In one example, the ratio of the cross-sectional diameter of the control seal 108 to width W1 is about 1:1. The dovetail 140 ensures that the control seal 108 remains in place within the control seal recess 124 under all rated operating conditions. The throttling portion 138 is the portion of the upper portion 116 that extends below the control seal groove 124.

[0080] A static seal recess 130 extends around the exterior of the valve core 68. The static seal recess 130 is disposed between a first external circumferential flow channel 100 and a second external circumferential flow channel 102. A static seal 110 is disposed in the static seal recess 130 and configured to provide a seal at the interface between the valve core 68 and the meter body 12. A control seat 128 extends from the interior of the valve core 68 and is disposed between a first internal circumferential flow channel 132 and a second internal circumferential flow channel 134. The control seat 128 provides a sealing surface for the control seal 108.

[0081] During operation, the valve stem 66 is adjusted between a closed position in which the control seal 108 engages with the control seat 128 and an open position in which the control seat 128 disengages from the control seat 128. The control seal 108 is initially in... Figure 4A In the closed position shown, the control seal 108 is positioned between the valve stem 66 and the control seat 128 to prevent any flow of the metered fluid between the first internal circumferential flow channel 132 and the second internal circumferential flow channel 134. To initiate fluid dispensing, the valve stem 66 is moved upward until the control seal 108 disengages from the control seat 128. When the control seal 108 initially disengages from the control seat 128, the annular flow path 142 opens between the throttling portion 138 and the control seat 128. The annular flow path 142 provides a restricted area for the flow of the metered fluid between the first internal circumferential flow channel 132 and the second internal circumferential flow channel 134. The restricted area created by the annular flow path 142 limits the initial flow rate of the metered fluid through the valve 50.

[0082] As valve stem 66 continues to move upward to the fully open position ( Figure 3C As shown in the diagram, the length of the annular flow path 142 decreases. As the length of the annular flow path 142 decreases, the velocity of the metered fluid flowing into the first internal circumferential flow channel 132 and through the annular flow path 142 simultaneously increases. Thus, the annular flow path 142 provides a flow forward for precise flow control. For example, the more the user presses the trigger, the greater the flow velocity through valve 50. The flow forward provided by the annular flow path 142 allows the user to precisely and consistently top-off the metered fluid during a dispensing event. During the top-off period, valve stem 66 slightly opens and closes to dispense a small amount of fluid so that the actual dispensing volume reaches the desired dispensing volume.

[0083] When the valve stem 66 is in the fully open position, the throttling portion 138 is offset from the control seat 128. With the valve stem 66 in the fully open position, an unrestricted flow path is created between the first internal circumferential flow channel 132 and the second internal circumferential flow channel 134. The throttling portion 138 is sized to disengage from the control seat 128 when the control seal 108 is positioned above the radial inlet 82, such that the control seal 108 is at least partially shielded from the full fluid velocity by the valve core 68. Thus, when the valve stem 66 is fully open, the control seal 108 is not positioned in the direct flow path of the metered fluid.

[0084] At the end of the distribution event, valve stem 66 returns to the closed position. When valve stem 66 transitions to the closed position, control seal 108 initially engages control seat 128 at control seat radius R. In some examples, the ratio of control seat radius R to the cross-sectional radius of control seal 108 is 1:2 to 1:10. In one example, the ratio of control seat radius R to the cross-sectional radius of control seal 108 is approximately 1:3. The control seat radius R allows control seal 108 to spring in and out of the sealing engagement with control seat 128, thereby preventing control seal 108 from experiencing jamming caused by deformation of control seal 108 at control seat 128. This further prevents erosion of the seal by high-speed fluid flow, as control seal 108 itself does not control fluid velocity. Therefore, control seal 108 provides lift valve-type flow control. When control seal 108 engages with control seat 128, flow is cut off. When control seal 108 disengages from control seat 128, flow continues. The control seal 108 does not throttle the flow; instead, the annular flow path 142 provides throttling for all flow passing through the valve 50. When the flow rate is controlled by the annular flow path 142, the control seal 108 is less susceptible to erosion by high-speed fluid flow.

[0085] Valve 50 offers significant advantages. As valve stem 66 moves from the closed position to the open position, annular flow path 142 provides forward flow. Annular flow path 142 also maintains the flow velocity below the maximum flow velocity until control seal 108 leaves the direct path of the metered fluid. Control seat radius R prevents control seal 108 from engaging as it transitions between the open and closed positions. Dovetail 140 prevents control seal 108 from displacing from control seal recess 124.

[0086] Figure 5A This is a first cross-sectional view of valve core 68. Figure 5B This is a second cross-sectional view of valve core 68. It will be discussed together. Figure 5A and Figure 5B The valve core 68 includes a valve core body 77, a first end 78, a second end 80, a radial inlet 82, a radial outlet 84, a control seat 128, a static seal groove 130, a first internal circumferential flow channel 132, a second internal circumferential flow channel 134, and a valve core bore 144. The first end 78 includes an internal thread 146. The second end 80 includes an external thread 148, an undercut portion 150, a valve stem support surface 152, and a valve core flange 154.

[0087] A valve core bore 144 extends from the first end 78 through the valve core body 77 to the second end 80. An internal thread 146 is provided at the distal end of the first end 78 and is configured to engage with a valve cap (e.g., valve cap 70, preferably see...). Figures 3A-3C The valve cap is secured to the valve core 68 by an external thread. A radial inlet 82 extends through the valve core body 77 into a first internal circumferential flow channel 132. A radial outlet 84 extends through the valve core body 77 into a second internal circumferential flow channel 134. A control seat 128 extends from the interior of the valve core body 77 into a valve core bore 144 and is disposed between the first internal circumferential flow channel 132 and the second internal circumferential flow channel 134. A static seal recess 130 extends around the exterior of the valve core body 77 between the radial inlet 82 and the radial outlet 84, and the static seal recess 130 is configured to receive a seal, such as a static seal 110 (see preferably). Figures 4A to 4B ).

[0088] The valve core flange 154 extends radially from the second end 80. The valve core flange 154 is configured to abut against the meter body (e.g., meter body 12, preferably see [reference needed]) when the valve core 68 is mounted in the meter body. Figure 2BThe external thread 148 extends around the second end 80 above the valve core flange 154. The external thread 148 is configured to interface with an internal thread on the meter body to secure the valve core 68 to the meter body. A valve stem support surface 152 extends into the second end 80. The valve stem support surface 152 restricts the valve stem (e.g., valve stem 66, preferably see [reference needed]) disposed in the valve core 68. Figures 3A to 3C The valve stem moves downwards. When the valve is in the closed position, the valve stem rests against the valve stem support surface 152. The undercut 150 extends into the interior of the valve core body 77 adjacent to the valve stem support surface 152. In some examples, the valve core 68 is machined from bar stock (e.g., steel). The undercut 150 facilitates dimensional control and surface finishing of the interior of the valve core bore 144 during the manufacture of the valve core 68.

[0089] Figure 6A This is an enlarged cross-sectional view of the bezel housing 20 and the display 46. The bezel housing 20 includes a display opening 156, and the display opening 156 includes an edge 158. The display 46 includes an upper retainer 160, a lower retainer 162, a first pad 164, a second pad 166, and a display screen 168.

[0090] A first circuit board 52, an antenna 56, and a solenoid 86 are disposed within the frame housing 20. The solenoid 86 extends at least partially into the meter body 12, which facilitates the lower profile of the frame housing 20. The antenna 56 is configured as a meter controller (e.g., meter controller 24). Figure 1B This provides wireless communication. First circuit board 52 and second circuit board 54 (see preferred) Figure 2B (The middle) may include being configured to control the operation of the handheld meter 10 (see preferably) Figure 1A Various electrical components, such as meter controllers.

[0091] Display 46 is mounted to bezel housing 20 within display opening 156. Display 46 is tilted toward the user at angle α. As discussed above, angle α can be any desired angle between 90 and 180 degrees. In one example, angle α is between 150 and 170 degrees. Display screen 168 is disposed between first pad 164 and second pad 166. In some examples, display screen 168 is an LCD. Both first pad 164 and second pad 166 may include an adhesive backing. Upper retainer 160 is connected to lower retainer 162, and upper retainer 160 and lower retainer 162 encapsulate first pad 164, second pad 166, and display screen 168. Upper retainer 160 is transparent to allow the user to view the image provided by the display screen. In some examples, lower retainer 162 is also transparent. For example, both upper retainer 160 and lower retainer 162 can be made of polycarbonate. The upper retainer 160 is attached to the bezel housing 20 to secure the display 46 in place within the display opening 156. In some examples, the upper retainer 160 may be secured by means of double-sided acrylic foam tape (e.g., (with) Installed onto the frame housing 20.

[0092] When the display 46 is mounted in the bezel housing 20, the edge 158 of the display opening 156 is raised relative to the display 46. If the handheld meter 10 is dropped or otherwise subjected to an impact, the raised edge 158 of the display opening 156 protects the display 46 from the impact.

[0093] Figure 7A It is along Figure 1A The sectional view of nozzle 16 taken by line 7-7 shows nozzle 16 in the open position. Figure 7B yes Figure 7A A magnified view of the details in Z. Figure 7C This is an enlarged cross-sectional view showing nozzle 16 in the closed position. It will be discussed together. Figures 7A to 7CNozzle 16 includes a connector 170, a nozzle body 172, a nozzle rod 174, and a nozzle spring 176. Connector 170 includes a mounting end 178 and a connector hole 180. Mounting end 178 includes a shoulder 182, a neck 184, and a connector sealing groove 186. Nozzle body 172 includes a receiving end 188, a dispensing end 190, a nozzle hole 192, and a vent 194. Dispensing end 190 includes an upstream portion 196, a downstream portion 198, and a connecting portion 200. Upstream portion 196 includes an upstream diameter D3. Downstream portion 198 includes a downstream diameter D4 and a nozzle outlet 202. Connecting portion 200 includes an angle γ. Nozzle rod 174 includes an inner tube 204, a rod flange 206, a flow channel 208, and a rod tip 210. Rod tip 210 includes a main tip body 212, a reduced diameter portion 214, and an overmolded tip 216. The rod flange 206 includes a flange seal groove 218. The overmolded tip 216 includes a sealing portion 220 and a tip cone 222. The tip cone 222 includes an angle θ, a base diameter D5, and a length L1.

[0094] Connector 170, nozzle rod 174, and nozzle body 172 are coaxially arranged on nozzle axis AA. Connector 170 is configured to attach to a handheld meter, such as handheld meter 10. Figure 1A In some examples, connector 170 is attached to an extension, such as extension 14. Figure 1A In other examples, connector 170 is attached to the swivel elbow of the vending machine, for example, swivel elbow 258 (see best). Figure 8B (Middle). The mounting end 178 of connector 170 extends into nozzle orifice 192 and connects to receiving end 188 of nozzle body 172. In some examples, mounting end 178 includes external threads configured to mate with internal threads in receiving end 188. Neck 184 extends from mounting end 178 into nozzle orifice 192. Shoulder 182 extends radially from neck 184. Connector seal recess 186 extends into mounting end 178, and connector seal 187 is disposed in connector seal recess 186.

[0095] Nozzle orifice 192 extends through nozzle body 172 between receiving end 188 and dispensing end 190. Downstream portion 198 is the distal end of dispensing end 190. Metered fluid exits downstream portion 198 through nozzle outlet 202. Connecting portion 200 is a tapered channel extending between and connecting upstream portion 196 and downstream portion 198. Connecting portion 200 provides a smooth transition between upstream diameter D3 of upstream portion 196 and downstream diameter D4 of downstream portion 198. Angle γ is the angle of connecting portion 200, and in some examples, angle γ is approximately 30 degrees. Vent orifice 194 extends through nozzle body 172 into nozzle orifice 192. Vent orifice 194 is open to the atmosphere to allow air to flow in and out of nozzle body 172 to prevent overpressurization in nozzle orifice 192 when nozzle stem 174 transitions between open and closed positions.

[0096] Nozzle rod 174 is disposed within nozzle orifice 192. Nozzle rod 174 is configured to move between an open position in which sealing portion 220 disengages from connecting portion 200 and a closed position in which sealing portion 220 engages with connecting portion 200. Inlet tube 204 extends through placement end 178 into connector hole 180. Rod flange 206 extends radially from inlet tube 204. Rod flange 206 is configured to abut neck 184 to limit displacement of nozzle rod 174. Nozzle spring 176 extends between shoulder 182 and rod flange 206. Flange seal groove 218 extends into outer edge of rod flange 206. Flange seal 207 is disposed in flange seal groove 218 between rod flange 206 and nozzle body 172. Flow passage 208 is disposed downstream of rod flange 206 and extends radially through nozzle rod 174 into inlet tube 204.

[0097] The rod tip 210 extends axially from the inlet pipe 204. A main tip body 212 extends from the inlet pipe 204, and a reduced-diameter portion 214 extends axially from the main tip body 212. An overmolded tip 216 is disposed on the reduced-diameter portion 214. The overmolded tip 216 may be formed of an elastomer. In some examples, the overmolded tip 216 is formed of nitrile rubber. However, it should be understood that the overmolded tip 216 may be formed of any elastomer chemically compatible with the metered fluid. A sealing portion 220 is configured to engage the connecting portion 200 when the nozzle rod 174 is in the closed position. A tip cone 222 extends from the sealing portion 220. An angle θ is the angle between the tip cone 222 and the downstream portion 198. In some examples, the angle θ is between approximately 20 degrees and 30 degrees. In one example, the angle θ is approximately 25 degrees.

[0098] The nozzle body 172 is movable relative to the connector 170 to allow the nozzle 16 to be displaced between an active and a deactivated state. In the active state, the nozzle rod 174 is movable between open and closed positions within the nozzle body 172. In the deactivated state, the rod flange 206 abuts the neck 184, and the sealing portion 220 abuts the connecting portion 200, preventing the nozzle rod 174 from displaced within the nozzle body 172. In the deactivated state, the nozzle rod 174 is locked in the closed position to prevent unintentional fluid dispensing. To displace the nozzle between the active and deactivated states, the user may further screw the nozzle body 172 onto or off the connector 170, thereby altering the distance the nozzle rod 174 can move within the nozzle body 172.

[0099] During operation, the nozzle body 172 is placed in the active position. With the nozzle body 172 in the active position, the user initiates the flow of the metered fluid to the nozzle 16. The metered fluid flows through the connector hole 180 and into the inlet pipe 204. The metered fluid flows out of the inlet pipe 204 through the flow passage 208, thereby generating fluid pressure within the nozzle hole 192. The fluid pressure acts on the rod flange 206 and overcomes the force of the nozzle spring 176, causing the nozzle rod 174 to move from the closed position to the open position. With the nozzle rod 174 in the open position, the sealing portion 220 disengages from the connecting portion 200, and the flow path opens through the dispensing end 190. The metered fluid flows between the tip cone 222 and the connecting portion 200 through the upstream portion 196 and exits the nozzle body 172 through the downstream portion 198.

[0100] The tip cone 222 facilitates a tight flow of the metered fluid exiting the dispensing end 190 through the nozzle outlet 202. The ratio of the base diameter D5 to the length L1 is between approximately 10:7 and 3:2. In one example, the ratio of the base diameter D5 to the length L1 is approximately 11:8. The tip cone 222 prevents splashing, diffusion, and atomization of the metered fluid exiting the dispensing end 190. As the metered fluid enters the connection portion 200, the flow path created between the connection portion 200 and the tip cone 222 directs the flow of the metered fluid along the nozzle axis AA. The metered fluid converges in the downstream portion 198 and is dispensed as a tight flow from the nozzle outlet 202. With the nozzle rod 174 in the open position, the tip cone 222 is offset from the nozzle outlet 202 of the downstream portion 198 by a length L2. In some examples, the length L2 is approximately 0.305 cm to 0.343 cm (approximately 0.120 inches to 0.135 inches). In one example, the length L2 is approximately 0.320 cm (approximately 0.126 inches). The ratio of diameter D4 to length L2 is approximately 2:1. Before the metered fluid exits nozzle outlet 202, length L2 and angle θ create laminar flow in the downstream section. Laminar flow eliminates splashing, diffusion, and atomization of the metered fluid. In some examples, the tip cone 222 promotes a tight flow of the metered fluid at rates up to approximately 10 gallons per minute.

[0101] After the dispensing event is completed, the user releases the trigger and cuts off the flow of the metered fluid to nozzle 16. When the flow of the metered fluid stops, valve spring 176 drives nozzle rod 174 to the closed position. With nozzle rod 174 in the closed position, sealing portion 220 engages connecting portion 200, and tip cone 222 extends into downstream portion 198. As nozzle rod 174 moves to the closed position, connecting portion 200 aligns with sealing portion 220 on nozzle axis AA, thereby facilitating alignment of nozzle rod 174 within dispensing end 190 and ensuring the formation of a tight fluid seal. As discussed above, the overmolded tip 216 is formed of a compliant material (e.g., nitrile rubber) that promotes the formation of a tight fluid seal even in the presence of contaminants in the metered fluid.

[0102] With nozzle rod 174 in the closed position, tip cone 222 extends into downstream portion 198. In some examples, when nozzle rod 174 is in the closed position, tip cone 222 occupies approximately 50% of the volume of downstream portion 198. Tip cone 222 ensures that the mass of the metered fluid held in downstream portion 198 is low enough that the surface tension of the metered fluid prevents it from dripping out of downstream portion 198. Thus, tip cone 222 extending into and occupying at least 50% of the volume of downstream portion 198 prevents any potential dripping of metered fluid within downstream portion 198 when nozzle rod 174 is moved to the closed position.

[0103] Nozzle 16 offers significant advantages. The overmolded tip 216 facilitates sealing and alignment of nozzle rod 174. Especially in the presence of contaminants in the metered fluid, the overmolded tip 216 further enhances compliance and seal. Connection portion 200 provides a smooth transition between the upstream diameter D3 and the downstream diameter D4, further ensuring alignment and sealing of nozzle rod 174. The tip cone 222 and length L2 create laminar flow in downstream portion 198, preventing splashing, diffusion, and / or atomization of the metered fluid. When nozzle rod 174 is in the closed position, tip cone 222 extends into and occupies downstream portion 198, thereby preventing potential dripping of metered fluid from nozzle outlet 202.

[0104] Figure 8A This is an isometric view of oil vending machine 224. Figure 8B This is the exploded view of component 226. Figure 8C This is a block diagram illustrating an example of a meter controller 24 and a user interface 28. Figure 8D This is a block diagram illustrating another example of the meter controller 24 and user interface 28. They will be discussed together. Figures 8A to 8D The fuel dispenser 224 includes dispensing assemblies 226a to 226c (collectively referred to herein as "dispensing assembly 226"), a frame 228, a front panel 230, and a chassis 232. The frame 228 includes a first side panel 234, a second side panel 236, a rear panel 238, and a manifold 240. The front panel 230 includes dispenser openings 242A to 242C (collectively referred to herein as "dispenser opening 242"). Figures 8C to 8D The control circuit 42 of the meter controller 24 is shown in the figure. Figure 8D Position sensor 247 is shown in the image. Figures 8C to 8D The display circuit 244 and user input circuit 246 of the user interface 28 are shown.

[0105] like Figure 8BAs shown, each dispensing assembly 226 includes a handheld meter 10, a nozzle 16, an inlet connector 248, an outlet connector 250, a manifold inlet adapter 252, a manifold 254, a manifold outlet adapter 256, and a swivel elbow 258. The manifold 254 includes a manifold inlet opening 260 and a manifold outlet opening 262. The handheld meter 10 is shown with a meter body 12, a trigger 18, a frame housing 20, a resilient trigger protection device 22, and a user interface 28. The meter body 12 is shown with a handle 32, an integrated trigger protection device 34, a fluid inlet 36, and a fluid outlet 38. The user interface 28 includes an input section 44 and a display 46.

[0106] The rear panel 238 extends between and connects to the first side panel 234 and the second side panel 236. In some examples, the first side panel 234, the second side panel 236, and the rear panel 238 are integrally formed as a single component. In other examples, the first side panel 234 and the second side panel are connected to the rear panel 238 by fasteners. The front panel 230 is mounted on top of the first side panel 234 and the second side panel 236. The chassis 232 is located at the bottom of the frame 228. The manifold 240 is defined between the front panel 230 and the rear panel 238. The dispensing assembly 226 is mounted on the dispensing station 224 and is configured to dispense fluid into containers. A handheld meter 10 is vertically aligned and incorporated into the dispensing station 224 to provide dispensing authorization and fluid tracking. Manifold 254 is disposed in header 240 and connected to front panel 230 by fastener 264, which extends through front panel 230 and into manifold 254. Inlet connector 248 extends into and connects to fluid inlet 36. Inlet connector 248 is configured to receive a supply hose extending from a large-capacity fluid tank. Outlet connector 250 connects to fluid outlet 38. Manifold inlet adapter 252 connects to outlet connector 250 and manifold inlet opening 260. Manifold outlet adapter 256 connects to manifold outlet opening 262 and extends through distributor opening 242 in front panel 230. Rotary elbow 258 is attached to the end of manifold outlet adapter 256 extending from front panel 230. Nozzle 16 is connected to rotary elbow 258 and configured to dispense metered fluid. For example, if each dispensing assembly 226 is connected to a different large-capacity storage tank containing different fluids, installing multiple dispensing assemblies 226 on the dispensing station 224 allows various types of fluids to be connected to the dispensing station 224 for dispensing.

[0107] User interface 28 includes display circuitry 244 and user input circuitry 246. User input circuitry 246 can be any suitable configuration to enable user actuation. For example, input section 44 may include a plurality of mechanical buttons that receive input from the user and provide input to user input circuitry 246, each button corresponding to a directional command indicated on display 46. Display circuitry 244 is any suitable digital or analog display capable of producing visual output visible on display 46. Control circuitry 42 is electrically connected within handheld meter 10 and can be any suitable configuration for controlling the operation of handheld meter 10. Control circuitry 42 is configured to control the generation of the display on display circuitry 244 and to identify and process operator commands provided via user input circuitry 246. Although control circuitry 42 is described as being configured to control the operation of handheld meter 10, it should be understood that control circuitry 42 can be decoupled from control circuitry controlling the operation of handheld fluid meter 10.

[0108] The handheld meter 10 is mounted on the vending machine 224 with its orientation reversed. The display 46 and input unit 44 are fixedly mounted on the frame housing 20. The meter controller 24 is configured to reverse the orientation of the visual output provided by the display 46, making the visual output readable by the user even when the handheld meter 10 is mounted with its orientation reversed. The user inputs vending machine commands to the handheld meter 10 via the input unit 44 to prepare the handheld meter 10 for use on the vending machine 224. Although vending machine commands are described as being provided by the user, it should be understood that vending machine commands can be automatically generated and provided to the control circuitry 42.

[0109] like Figure 8D As shown, the handheld fluid meter 10 may include a position sensor 247, which may be any suitable sensor for determining the relative position of the handheld fluid meter 10, for example, an accelerometer. The position sensor 247 senses the relative position of the handheld fluid meter 10 and is configured to determine when the handheld fluid meter 10 is in a reverse position. The position sensor 247 provides relative position information to control circuitry 42, and control circuitry 42 may automatically generate a dispensing station command based on the relative position information indicating that the handheld fluid meter 10 is in a reverse position. In another example, the handheld fluid meter 10 may include a sensor configured to generate a dispensing station command based on the position of the handheld fluid meter 10 on dispensing station 224. For example, the handheld fluid meter 10 may include a reed switch activated by a magnet mounted on dispensing station 224.

[0110] Control circuit 42 receives commands from user input circuit 246 and / or from position sensor 247, and provides orientation instructions to display circuit 244. Based on the orientation instructions, the orientation of the visual output provided by display circuit 244 is modified so that the visual output is readable by the user when handheld meter 10 is mounted on dispenser 224. In one example, display circuit 244 rotates the visual output by 180 degrees.

[0111] In addition to rotating the visual orientation, the control circuit 42 can also modify the functionality of the buttons on the input section 44 so that the orientation of the visual output is reflected in the button functionality. The control circuit 42 modifies the functionality of the buttons on the input section 44 so that the command provided at each button is related to the desired relative direction on the visual output. For example, when the input section 44 is configured to correlate the button orientation with the standard upright display orientation, the control circuit 42 is configured to invert the "up" and "down" buttons in addition to inverting the visual output provided by the display 46. Thus, the "up" button becomes the "down" button and the "down" button becomes the "up" button. In this way, when the handheld meter 10 is mounted on the vending machine 224 in an inverted position, the command input by the user provides the desired directional control of the visual output. In the case of inverted screen orientation, the control circuit 42 can also invert the left and right buttons to correctly associate "left" and "right". In other examples, the input section 44 is configured to correlate the button orientation with the relative direction on the screen. In such an example, the control circuit 42 does not reverse the command from the input section 44 because even if the visual output is reversed, the relative orientation of the display 46 and the button remains the same. Therefore, the control circuit 42 reverses the visual output provided by the display circuit 244 and can modify the button's functionality to ensure that the visual output is readable when the handheld meter 10 is in the reversed position and to ensure that the button command is related to the desired relative orientation on the visual output.

[0112] With the visual output of the display screen 46 reversed, the display screen 46 remains readable by the user when the handheld meter 10 is mounted on the vending machine 224. As discussed above, the display 46 extends through the bezel housing 20 and is angled α relative to the handle 32. Figure 2B and Figure 6AAs shown in the diagram, the display 46 is tilted towards the handle 32. With the display 46 at angle α, the visual orientation is upward, towards the user, and perpendicular to the user's line of sight. Angle α can be any desired angle that positions the display 46 in the user's line of sight when the user dispenses it using the dispensing component 226. Thus, angle α can be between 90 degrees and 180 degrees. In some examples, angle α is between 150 degrees and 170 degrees. Therefore, the display 46 is in an ergonomic viewing position for the user. Additionally, the trigger 18 is mounted above the display 46 and the fluid outlet 38, positioning the trigger 18 in an ergonomic position that allows the user to easily and simultaneously observe the display 46 and manipulate the trigger 18.

[0113] Control circuit 42 is described as reversing the visual output and / or button functionality of display circuit 244 and input section 44 to prepare for use of handheld fluid meter 10 on vending machine 224. However, it should be understood that the vending machine command is not limited to use of handheld fluid meter 10 on vending machine 224. For example, in a car shop, handheld fluid meter 10 can be suspended from a hose reel mounted on the ceiling. When suspended, handheld fluid meter 10 is in the reverse position. Whenever handheld fluid meter 10 is in the reverse position, control circuit 42 can modify the orientation of the visual output and button functionality, for example, based on information received from position sensor 247. Thus, whenever handheld fluid meter 10 is in the reverse position, the user can easily and quickly observe the visual output.

[0114] Dispensing assembly 226 and meter controller 24 offer significant advantages. Mounting the handheld meter 10 in the reverse position orients the display 46 in an ergonomically convenient position for the user. Mounting the handheld meter 10 in the reverse position also reduces the number of components and eliminates the complex piping previously required for manufacturing handheld meters suitable for use on the vending machine 224. The dispensing assembly 226, including the handheld meter 10, reduces the inventory required in the store because the vending machine 224 application does not require a special PN meter. Control circuitry 42 modifies the orientation of the visual output so that it can be easily read when the handheld meter 10 is in the reverse position. Control circuitry 42 also modifies the function of the buttons on the input section 44 so that button orientation is associated with visual orientation, allowing the user to easily and intuitively control the handheld meter 10. Control circuitry 42 modifies the visual output based on information received from position sensor 247 to ensure that the visual output is correctly oriented whenever the handheld fluid meter 10 is in the reverse position, without requiring user input.

[0115] Although the invention has been described with reference to several exemplary embodiments, those skilled in the art will understand that various changes can be made and elements can be substituted with equivalents without departing from the scope of the invention. Furthermore, many modifications can be made to adapt particular situations or materials to the teachings of the invention without departing from the basic scope of the invention. Therefore, the invention is intended to be limited to the specific embodiments disclosed, but rather to include all embodiments falling within the scope of the appended claims.

Claims

1. A handheld fluid meter for use at a vending machine, the handheld fluid meter comprising: Measuring instrument body, the measuring instrument body comprising: handle; A fluid inlet that extends into the handle; A fluid outlet extends from the end of the meter body opposite to the handle; A trigger configured to be manually shifted to control the flow of fluid between the fluid inlet and the fluid outlet; A frame housing, which is mounted on the meter body, includes a display opening; A display screen, which is fixedly mounted inside the display opening; A user input section is fixedly mounted on the frame housing, and the user input section includes multiple buttons; Display circuitry configured to provide visual output at the display screen in multiple orientations; User input circuitry, configured to receive input from a user via the plurality of buttons to modify the visual output of the display screen; and A control circuit is connected to communicate with the display circuit and the user input circuit, the control circuit being configured to receive input from the user input circuit regarding the desired orientation of the visual output, and to provide instructions to the display circuit to modify the orientation of the visual output.

2. The hand-held fluid meter of claim 1, wherein, The multiple orientations include standard orientation and reverse orientation.

3. The hand-held fluid meter of claim 2, wherein, The standard orientation differs from the reverse orientation by 180 degrees.

4. The hand-held fluid meter of any one of claims 2-3, wherein, The visual output is oriented toward the handle in the standard orientation, and the visual output is oriented away from the handle in the reverse orientation.

5. The hand-held fluid meter of claim 1, wherein, The buttons are mechanically activated buttons.

6. The handheld fluid meter according to claim 1, wherein, The control circuit is configured to modify the function of the plurality of buttons based on the orientation of the visual output.

7. The handheld fluid meter according to any one of claims 1-3, 5 and 6, wherein, The display screen is oriented at an angle between 90 and 180 degrees relative to the handle.

8. The handheld fluid meter according to claim 7, wherein, The display screen is oriented at an angle between 160 and 170 degrees relative to the handle.

9. The handheld fluid meter according to claim 1, further comprising: A nozzle configured to receive fluid output from the fluid outlet, the nozzle comprising: A connector having a mounting end and a connector hole extending through the connector; A nozzle body, attached to the connector, the nozzle body comprising: Receiving end; A dispensing end, disposed opposite to the receiving end, defines a fluid outlet, the fluid outlet comprising: The upstream portion has a first diameter; The downstream portion has a second diameter, which is smaller than the first diameter; and A connecting portion, extending between and connecting the upstream and downstream portions, includes a tapered channel; and A nozzle orifice extends through the nozzle body between the receiving end and the dispensing end, wherein the placement end extends into the nozzle orifice and connects to the receiving end; A nozzle rod disposed in the nozzle orifice and located between the placement end and the fluid outlet, the nozzle rod including an overmolded tip, the overmolded tip including a tip cone, the tip cone being configured to engage with and abut against the tapered channel for sealing when the nozzle rod is in the closed position.

10. The handheld fluid meter according to claim 9, wherein, The tip cone includes a first cone angle, and the tapered channel includes a second cone angle, wherein the first cone angle is smaller than the second cone angle.

11. The handheld fluid meter according to claim 10, wherein, The ratio of the first cone angle to the second cone angle is 5:

6.

12. The handheld fluid meter according to claim 11, wherein, The first cone angle is 25 degrees.

13. The handheld fluid meter according to claim 9, wherein, The overmolded tip further includes a sealing portion disposed at the upstream end of the tip cone, the sealing portion being configured to engage the connecting portion when the nozzle rod is in the closed position.

14. The handheld fluid meter according to claim 13, wherein, With the nozzle rod in the closed position, the tip cone extends into the downstream portion.

15. The handheld fluid meter according to claim 14, wherein, The ratio of the volume of the tip cone to the volume of the downstream portion is 1:

2.

16. The handheld fluid meter according to any one of claims 9 to 13, wherein, The overmolded tip includes an elastomer.

17. The handheld fluid meter according to claim 16, wherein, The elastomer is nitrile rubber.

18. The handheld fluid meter according to any one of claims 9 to 15, wherein, With the valve stem in the open position, the ratio of the offset length between the distal portion of the tip cone and the nozzle outlet to the diameter of the downstream portion is 2:

1.

19. The handheld fluid meter according to any one of claims 9 to 15, wherein, The nozzle rod further includes: An inlet tube extends through the mounting end into the connector hole; A rod flange extending radially from the inlet tube, the rod flange being configured to abut the mounting end to limit upstream displacement of the nozzle rod; At least one flow channel extends through the wall of the inlet pipe on the downstream side of the rod flange; A rod tip, extending downstream from the inlet pipe, the rod comprising: A main tip body extending from the inlet tube; A diameter-reduced portion, said diameter-reduced portion extending from the main tip body; and An elastomer tip, which is overmolded onto the reduced diameter portion, includes a tip cone configured to engage with and abut against the tapered channel in a closed position for sealing.

20. The handheld fluid meter according to claim 19, further comprising: A flange groove that extends into the outer edge of the rod flange; and A flange seal is disposed in the flange groove and located between the rod flange and the nozzle body.

21. The handheld fluid meter according to claim 19, further comprising: A spring is disposed in the nozzle body and located between the mounting end and the rod flange.

22. The handheld fluid meter according to claim 21, wherein, The placement end includes: Shoulders; and A neck that extends from the shoulder and is configured to abut the rod flange; The spring extends around the neck and is adjacent to the shoulder.

23. The handheld fluid meter according to claim 22, further comprising: A connector recess extending from the connector hole into the mounting end; and A connector seal is disposed in the connector groove and located between the placement end and the inlet pipe.

24. The handheld fluid meter of claim 1, further comprising a nozzle having a nozzle rod, the nozzle rod comprising: Inlet pipe; A rod flange extending radially from the inlet pipe, the rod flange including a flange groove extending into an outer edge of the rod flange, the flange groove being configured to receive a seal; At least one flow channel extends through the wall of the inlet pipe on the downstream side of the rod flange; A rod tip, extending downstream from the inlet pipe, the rod tip comprising: A main tip body extending from the inlet tube; A diameter-reduced portion, said diameter-reduced portion extending from the main tip body; and An overmolded tip seal is disposed on the reduced diameter portion, the overmolded tip seal comprising a sealing portion and a tip cone extending from the sealing portion.

25. The handheld fluid meter according to claim 24, wherein, The tip cone angle is 25 degrees.

26. The handheld fluid meter according to claim 24, wherein, The ratio of the tip cone diameter to the tip cone length is 11:

8.

27. The handheld fluid meter according to any one of claims 24 to 26, wherein, Overmolded tip seals include elastomers.

28. The handheld fluid meter according to claim 27, wherein, The elastomer is nitrile rubber.

29. A dispensing assembly for use in a fuel dispenser, the dispensing assembly comprising: A handheld fluid meter, the handheld fluid meter comprising: Measuring instrument body, the measuring instrument body comprising: handle; A fluid inlet that extends into the handle; A fluid outlet extends from the end of the meter body opposite to the handle; A trigger configured to be manually shifted to control the flow of fluid between the fluid inlet and the fluid outlet; A frame housing, which is mounted on the meter body, includes a display opening; A display screen, which is fixedly mounted inside the display opening; A user input section is fixedly mounted on the frame housing, and the user input section includes multiple buttons; Display circuitry configured to provide visual output at the display screen in multiple orientations; User input circuitry, configured to receive input from a user via the plurality of buttons to modify the visual output of the display screen; and A control circuit is connected to communicate with the display circuit and the user input circuit, the control circuit being configured to receive input from the user input circuit regarding the desired orientation of the visual output, and to provide instructions to the display circuit to modify the orientation of the visual output; A manifold configured to be installed in a vending machine, the manifold including a manifold inlet opening and a manifold outlet opening; The handheld fluid meter is configured to be mounted on the manifold such that the handle extends vertically above the display.

30. The dispensing component of claim 29, further comprising: An inlet connector, configured to be received by the fluid inlet and connected to a fluid supply hose; An outlet connector, configured to receive fluid from the fluid outlet; A manifold inlet adapter, configured to connect to the outlet connector and the manifold inlet opening; A manifold outlet adapter, the manifold outlet adapter being configured to connect to the manifold outlet opening; A swivel elbow configured to connect to the manifold outlet adapter; and A nozzle configured to be connected to the swivel elbow.

31. The distribution component according to claim 29, wherein, The multiple orientations include standard orientation and vending machine orientation.

32. The distribution component according to claim 31, wherein, The standard orientation differs from the oil vending platform orientation by 180 degrees.

33. The distribution component according to claim 31, wherein, The visual output is oriented toward the handle in the standard orientation and away from the handle in the vending machine orientation.

34. The dispensing component according to any one of claims 29 to 33, wherein, The control circuit is configured to modify the function of the plurality of buttons based on the orientation of the visual output.

35. The dispensing component according to any one of claims 29 to 33, wherein, The display screen is oriented at an angle between 90 and 180 degrees relative to the handle.

36. The dispensing component of claim 35, wherein, The display screen is oriented at an angle between 160 and 170 degrees relative to the handle.

37. An oil dispensing station assembly, the oil dispensing station assembly comprising: A frame having a first side support member, a second side support member, and a rear panel extending between and connecting the first side support member and the second side support member; A front panel extending between and attached to a first side support member and a second side support member, wherein the front panel and the rear panel define a manifold, and wherein a distributor opening extends through the front panel; Distribution component, the distribution component being mounted to the front panel, the distribution component comprising: A handheld fluid meter, the handheld fluid meter comprising: Measuring instrument body, the measuring instrument body comprising: handle; A fluid inlet that extends into the handle; A fluid outlet extends from the end of the meter body opposite to the handle; A trigger configured to be manually shifted to control fluid flow between the fluid inlet and the fluid outlet; A frame housing, which is mounted on the meter body, includes a display opening; A display screen, which is fixedly mounted inside the display opening; A user input section is fixedly mounted on the frame housing, and the user input section includes multiple buttons; Display circuitry configured to provide visual output at the display screen in multiple orientations; User input circuitry, configured to receive input from a user via the plurality of buttons to modify the visual output of the display screen; and A control circuit is connected to communicate with the display circuit and the user input circuit, the control circuit being configured to receive input from the user input circuit regarding the desired orientation of the visual output, and to provide instructions to the display circuit to modify the orientation of the visual output; A manifold, which is disposed within the header and attached to the front panel, the manifold including a manifold inlet opening and a manifold outlet opening; An outlet connector that extends into the fluid outlet; A manifold inlet adapter that extends between and connects the outlet connector and the manifold inlet opening; A manifold outlet adapter extends through the distributor opening and connects to the manifold outlet opening; A swivel elbow, the swivel elbow being connected to the manifold outlet adapter; and A nozzle, which is connected to the swivel elbow.

38. The oil dispensing station assembly according to claim 37, wherein, The plurality of orientations includes a standard orientation and a vending machine orientation, wherein the visual output is oriented toward the handle in the standard orientation and the visual output is oriented away from the handle in the vending machine orientation.

39. The oil dispensing station assembly according to any one of claims 37 to 38, wherein, The display screen is oriented at an angle between 90 and 180 degrees relative to the handle.

40. The oil dispensing station assembly according to any one of claims 37 to 38, wherein, The display screen is oriented at an angle between 160 and 170 degrees relative to the handle.

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