Abstract:
A fuel dispensing nozzle, incorporating a uniquely shaped gasket for the poppet valve, generally of truncated shape, enhances the flow of fuel through the nozzle when actuated. A handle lever for the nozzle, which is designed having an elongated and enlarged end, includes elongated slots, that are pivotally pinned through both the latch plate, and the handle link, in order to reduce the space between the interconnection between the front of the latch plate to the bottom of the automatic shutoff stem, such that by lessening the distance between these components, thereby reducing the fulcrum point for the calculation of the force necessary to open the nozzle by raising its handle lever, and reduces the force necessary to achieve nozzle opening and actuation, to less than 5 lbs pressure during usage and application.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
       [0001]    This regular letters patent application claims priority to the provisional application having Ser. No. 61/996,431, filed on May 7, 2014. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The concept of this invention is to provide, generally, a nozzle, where its poppet valve is contoured into a truncated shape to enhance the flow of fuel through the nozzle as it is dispensing the same, and having a shift in the fulcrum point of the handle lever to lessen the force necessary to open the nozzle poppet valve for dispensing of fuel. 
       BACKGROUND OF THE INVENTION 
       [0003]    A variety of nozzles have been designed over the years wherein their structure has been improved to add to the convenience of usage of the nozzles while dispensing fuel to a vehicle, or other fuel container, and while generally being applied to recover vapors, so as to minimize air pollution during fuel dispensing. With these types of nozzles, whether it is of the vacuum assist type, and more particularly the balanced pressure type of nozzle, the amount of pressure and force necessary to operate the nozzles generally was ignored, in order to attain these other results. 
         [0004]    The assignee of the current invention has made many improvements to nozzle constructions, through usage of the hand lever for acting in conjunction with the stem of the poppet valve, to elevate it to achieve fuel dispensing, and at the same time, provide for automatic shutoff of the flow of fuel through the nozzle, through the operations of its vacuum pressured automatic shutoff means, that would release the hand lever for its disengagement allowing for the poppet valve to immediately close, and cease the transfer of fuel through the nozzle. Such can be seen in the Company&#39;s early U.S. Pat. No. 4,658,987, upon a No Pressure Shut off for Automatic Fuel Nozzle Valve. 
         [0005]    Other patents of the assignee have tried to make improvements to the structure of the nozzle, such as can be seen in the Poppet Valve Means of U.S. Pat. No. 4,397,447. In addition, U.S. Pat. No. 4,596,278 shows a Balanced, Two-Stage Poppet Valve for Fuel Dispensing Nozzle. While these nozzles worked highly satisfactory for their intended purposes, and that is to dispense fuel quickly and efficiently, the structure of the shown handle lever for the disclosed patent still required a fair amount of force to be exerted upon the lever, to raise it, and its associated poppet stem, to attain an opening of the nozzle for dispensing. This type of force made it rather difficult for the handicapped and elderly to dispense fuel, particularly at a self-serving dispenser, and it required further modifications to the nozzle, to remedy this problem. 
         [0006]    The U.S. Pat. No. 5,394,909, upon a Vapor Control Valve, showed further modifications to the structure of its nozzle, and its various operating components, to achieve more efficient fuel dispensing, and also for capturing vapors that are returned through the nozzle to a storage area. 
         [0007]    U.S. Pat. No. 5,474,115 shows a Specialty Fuel Dispensing Nozzle, of the balance pressure type, and it also required a substantial amount of force on behalf of the user, for inserting and compressing the bellows of the nozzle tightly against the fuel intake for a vehicle in which the nozzle was used, to capture vapors, and to replenish the auto with fuel. Furthermore, it required a fair amount of force, generally in the 8-10 lb range, to lift the hand lever, to initiate the operations of the nozzle, during a refueling operation. 
         [0008]    Another patent to the assignee is U.S. Pat. No. 4,016,910, which showed a Fuel Dispensing Nozzle with Automatic Shut-Off Responsive to Vapor Pressure. In addition, U.S. Pat. No. 4,031,930, discloses an early Automatic Shut-Off Nozzle with Lockable Vapor Relief Valve. 
         [0009]    U.S. Pat. No. 6,585,014 shows an early effort by the applicant to make it more easier and controllable to dispense fuel through a nozzle, wherein the engagement of the handle with the poppet valve stem was designed to provide the user with more leverage to open the valve assembly than was available at that time in conventional nozzle configurations. This was an early effort to rearrange the fulcrum of pressure exerted upon the poppet stem, through the handle, in order to reduce the force necessary to raise it and its poppet valve into a fuel dispensing position. 
         [0010]    The current invention is designed to even further adjust the arrangement and configuration of various components of the nozzle, such as its poppet stem, its handle lever, and its latch plate, all in an effort to further reduce the force necessary to allow for fuel dispensing, and also, provides for further modifications to the poppet valve itself, in order to enhance and accelerate the flow of fuel through the nozzle, when replenishing a vehicle fuel tank, and to make the nozzle more easy to use. 
       SUMMARY OF THE INVENTION 
       [0011]    The concept of this invention is to provide for modifications to the operative components of a fuel dispensing nozzle, particularly with respect to the enhanced flow of fuel through the nozzle, and its poppet valve, and at the same time, furnishing means for lessening the pressure required to lift the poppet valve from its valve seat, requiring a much lesser force, to ease the use and operation of the nozzle, while dispensing fuel, particularly at a self-service dispenser. The first aspect of the improvements to the nozzle, is achieved through the use of a truncated poppet valve, one which when opened provides a greater space through which the fuel may flow, unobstructedly, to provide for a more rapid fill-up of the vehicle fuel tank, during dispensing. The second concept of the invention is to shift the fulcrum point at which the hand lever engages the bottom of the poppet stem, of the same poppet valve, to a position where greater leverage can be attained, thereby lessening the force required to open the poppet valve, in initiating fuel flow. 
         [0012]    As known, the handle lever that is manipulated by the nozzle user has a particular configuration that allows for its convenient grasping of its handle portion, and then has a turned segment that locates at a position between the poppet stem, and the automatic shutoff valve stem, in order to add some shiftability to the relationship between the end of the handle lever, and the latch plate to which it pivotally and shiftably mounts. To achieve such, the end of the hand lever incorporates a slotted configuration, through which the latch plate is pinned, so that the latch plate can shift somewhat vertically relative to the hand lever operative end, to add greater flexibility to the functional operation of the hand lever, and its operative components, in cooperating with the poppet stem, and the automatic shutoff means, during usage and application. A handle link also pivotally mounts to the hand lever, at a rearward position from the poppet stem, and further pivotally mounts to the same pin that secures the latch plate to the slotted portion of the hand lever, forwardly of the poppet stem, and through that arrangement, is designed to shift the fulcrum point of the operations of the hand lever, from their connection with the lower end of the automatic shutoff means, and thus, by shortening of the fulcrum point of their operations provides greater leverage to lifting of the poppet stem upwardly, into a opened position, in preparing the nozzle for dispensing. In doing such, the force required to lift the handle lever, because of the greater leverage it attains, through the interconnection of these components, lessens the force necessary to lift the poppet stem into its opened position, in preparation for and during fuel dispensing. In doing such, the normal force for opening of the poppet stem, through lifting of the hand lever, which was in the vicinity of 8-10 lbs, as aforesaid, has been reduced to a force less than 5 lbs of pressure, necessary to manipulate the nozzle into an opened condition. This lessening of force reduces the effort that must be used by those of weaker capacity, such as the elderly, the handicapped, the youth, the female, where a reduction in force facilitates their self-delivery of fuel through the nozzle during dispensing. 
         [0013]    In fact, calculations can provide for an indication of the reduction in force that can be attained through usage of the nozzle of this design, as can be seen from the following schematic chart, and the formula calculations, that can be determined mathematically, as noted. The chart, its parameters, and the calculations that may be made through the following formula can show the lesser force required through usage of the nozzle of this invention, during application. 
         [0014]    As can be noted in  FIG. 8  of the drawings, these various formula and calculations for determining the lesser force required through usage of the nozzle of this invention, are set forth. Through these, and upon review of the schematic chart disclosed therein, this provides a mathematical determination to the reduction of force required to use the nozzle of this design. 
         [0015]    As can be noted, from the calculations as determined, for the shifting of the focal point of the hand lever during its usage, in elevating the poppet stem into an opened position, there is a determined percentage of force reduction equal to about 50.5%, required to open the poppet valve, through the upward manipulation of its stem, when initiating the operations of the fuel dispensing nozzle. 
         [0016]    It is, therefore, the principal object of this invention to provide means for enhancing the flow of fuel through a nozzle, through the use of a truncated or sloped poppet valve, to provide a greater opening capacity for the poppet, within the nozzle, to achieve greater fuel flow. 
         [0017]    It is a further object of this invention to provide a structural reshifting of various components of the nozzle, particularly the interrelationship between the nozzle hand lever, and its location and operation between the poppet stem, and the bottom of the automatic shutoff means, in order to achieve a significant reduction in the amount of force necessary to lift the poppet valve into an opened configuration, to achieve that accelerated fuel flow. 
         [0018]    These and other objects may become more apparent to those skilled in the art upon review of the summary of the invention as provided herein, and upon undertaking a study of the description of its preferred embodiment, in view of the drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]    In referring to the drawings: 
           [0020]      FIG. 1  shows a sectional view of a prior art style of fuel dispensing nozzle; 
           [0021]      FIG. 2  shows a sectional view of the inventive nozzle of the current design; 
           [0022]      FIG. 3  shows the positioning of the operative components of the fuel dispensing nozzle of  FIG. 2 , while opened and dispensing fuel; 
           [0023]      FIG. 4  discloses the fuel dispensing nozzle of this design, immediately after the automatic shutoff has initiated closure, and just before the poppet valve is shifted and dropped into a closed position; 
           [0024]      FIG. 5  shows the truncated gasket of the poppet valve of this invention, in closed position; 
           [0025]      FIG. 6  shows the gasket of the poppet valve of this invention in its opened and fuel flowing condition; 
           [0026]      FIG. 7  discloses an exploded view of the various operative components of the hand lever and latch plate for the nozzle of this invention; and 
           [0027]      FIG. 8  shows the chart and calculations indicating the lesser force required through usage of the nozzle of this invention. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0028]    In referring to the drawings, and in particular  FIG. 1 , therein is shown a prior art style of nozzle construction  1 , which as known, includes a housing  3  having an inlet  4  and an outlet  6  generally at the location of the formation and location of the spout  7  to the nozzle. The nozzle includes a main valve  8  that includes a poppet valve  9  that rests upon a valve seat  10 , with the poppet valve having a poppet stem  11  that extends downwardly through the nozzle body, as at  12 . Usually, the handle lever  5  includes a hand gripping portion  13  which is configured in a rather S shape, having an intermediate portion  14  and a forwardly extending integral portion  15  that secures by a pinned connection, as at  16 , to the bottom of the automatic shutoff stem  17  for the shown nozzle. Thus, when the handle lever  5  is elevated, it pushes the poppet stem  11  upwardly, at the location of  18 , to provide for an opening of the poppet valve and the flow of fuel through the nozzle, for dispensing into a vehicle fuel tank (not shown). To retain the handle lever  5  in a opened position, a latch plate  19  engages with a lock plate  20  to maintain the handle in an opened condition, until such time as the handle lever is released from its latch plate connection, through the release of the lock plate  20 , to allow the nozzle poppet valve to quickly enter into closure. This is normally achieved through the automatic shutoff means, in a manner as known in the art, being released, so that its stem  17  will abruptly drop, releasing the lock plate, to allow the handle to drop downwardly, allowing the poppet stem  11  to allow the poppet valve to enter into prompt closure, immediately shutting off any further fuel flow through the nozzle. As generally can be seen, with the location of the handle lever  5 , that extends all the way integrally to its pinned connection, as at  16 , with the shutoff stem  17 , there is significant distance from the end of the hand lever, as at  21 , to the pinned connection  16 , and further distance between the pinned connection  16 , to the bottom of the poppet stem, as at  18 , so that the fulcrum for the handle lever to open the nozzle, against the pressure of the poppet spring, is significant, and as previously summarized, generally somewhere in the vicinity of 8-10 lbs, or more, of pressure that is required to open the hand lever for dispensing of gasoline. 
         [0029]    One of the significant improvements of the current invention, as can be seen in  FIGS. 2 ,  5  and  6 , is the usage of a particular designed poppet valve gasket, as at  22 , which is truncated of shape, having a downwardly sloping edge, as at  23 , so that when the poppet valve is opened, as can be seen in  FIG. 6 , a much greater spacing, as at  24 , is provided between said gasket and the valve seat, that allows for a more abundant flow of the fuel to pass through the nozzle, as at F, at the location of the poppet valve, to provide for a more accelerated flow of fuel through the nozzle, during dispensing. It can be seen how the gasket  22  and its downwardly sloping compound contoured surfaces  23  seat within the opening  24  of the nozzle, as noted in  FIG. 5 , where the poppet valve is shown in closure. Nevertheless, when opened, as noted in  FIG. 6 , it provides an abundant flow path through which the vehicle fuel can pass, through the nozzle, for accelerating the fill-up of the vehicle fuel tank, to which the nozzle is applied. 
         [0030]    The hand lever mechanism and its associated components for this invention are disclosed in  FIG. 7 . The hand lever  5 , with its hand gripping portion  13 , is formed to the unique shape as further reviewed, having an intermediate portion  14  and a forwardly and integrally extending portion  15 , as explained. The latch plate  19  can be seen, and it has a forwardly extending portion  25  and the rearwardly extending latch plate  26  which includes a series of ridges, as at  27 , and into which the end of the lock plate  20  can temporarily engage, when the handle lever is raised to allow for automatic dispensing of fuel through the nozzle, and is held into an opened position, due to such engagement. The handle lever  5  further includes the handle link  28  whose upper surface  29  is what contacts the bottom of the poppet stem  11 , to hold it into an opened condition, during fuel dispensing. The assembly of these various parts can be described as follows. The lock plate  20  is secured by means of the pivot pin  30  through the pin seat apertures  31  which also holds, within the handle, the biasing spring  32  which normally urges the lock plate to pivot upwardly, during normal disengagement of it from the latch plate  26 . Thus, when the handle lever  5  is raised, the user of the nozzle must pivot the lock plate  20  downwardly, to engage it within the ridges  27  of the latch plate  19 , to keep the poppet valve open, as can be understood. 
         [0031]    The handle link  28  has an aperture  33  at one end, and it is secured for pivotal movement, by means of the pivot pin  34  seating within the apertures  35  of the hand lever. That allows for the link to pivot relative to the handle lever, as can be understood. 
         [0032]    The opposite end of the latch plate  19  includes forwardly extending arms, as at  36 , and these arms are secured to the pivot point  16  at the bottom of the automatic shutoff stem  17 , to attain pivotal movement relative thereto. 
         [0033]    The opposite end of the link  28  secures by the pin  37  through the latch plate apertures  38 , and the pin arranges these arms to either side of the enlarged end  39 , of the hand lever, with the pin extending also through the elongated slots  40  of said handle lever, as can be noted. Thus, when the handle lever is raised, its forward end  39  shifts downwardly, the front end of the link, as at  41 , as pinned therein, shifts upwardly within the elongated slots  40 , and since the shutoff stem  17  is secured in its upward position, as can be seen in  FIG. 3 , the link  28  biases against the poppet stem  11 , raises it, opening the poppet valve, and its gasket  22  into an opened condition, during fuel flow. Thus, because of the slotted arrangement  40 , within the hand lever, this shifts the length of the fulcrum of the contact of the valve stem  17  with the link, closer to the hand levers pivotal connection, as at  16 , to the bottom of the shutoff stem  17 . The shorter that distance, and the longer the distance between that pivotal point  16  to the end of the handle, increases the fulcrum power of the hand lever, when opening the nozzle, and provides for a lesser force requirement to attain the opening of the nozzle, than has heretofore been achieved in nozzle construction. As can be calculated through the various formulations provided within this disclosure, that lessening of force is approximately 50% less than the force usually required for opening the prior art style of nozzle (as in  FIG. 1 ), and therefore, reduces that force below 5 lbs of pressure, which has been determined through research and experimentation. Such can also be calculated from the various formulations as identified and shown in the summary of this particular invention. 
         [0034]    Then, when the automatic shutoff means  42  is rendered operative, as when fuel fills up the vehicle fuel tank, and the fuel blocks the tip end of the nozzle spout, the automatic shutoff means is actuated, provides for an immediate drop in its stem  17  to a lower position, which automatically releases the lock plate  20  from engagement with its latch plate  19 , and allows the poppet valve  9  to drop with the valve stem  11 , into closure, in the manner as shown in  FIG. 5 . Thus, as previously reviewed, the concept of this invention is to provide for a lesser force requirement to open the poppet valve, during its usage, and at the same time, to increase fuel flow, because of the unique shape and construction of its poppet valve, and the associated gasket, of the shown nozzle. 
         [0035]    Variations or modifications to the subject matter of this invention may occur to those skilled in the art upon review of this invention, as described. Such variations, within the scope of this invention, are intended to be encompassed within the scope of any claims to patent protection issuing hereon. The description of the preferred embodiment, and its depiction in the drawings, are primarily set forth for illustrative purposes only.