Integral tilted poppet valve for controlled flow of fuel from fuel dispensing nozzle

Abstract

An integral tilted poppet valve for controlled flow of fuel from a fuel dispensing nozzle, including a poppet skirt, embodied within the poppet valve accessory of this invention, the poppet skirt cooperates with the poppet stem, and the poppet holder and its seal disc, to furnish a sealing of the nozzle, through the poppet valve, when the fuel nozzle is not in use, but that upon actuation of the nozzle lever, elevating its poppet stem, the poppet skirt includes an upper inclined surface for biasing against the poppet holder and its seal disc, to tilt the opening of the nozzle to provide for a minor or trickle flow of fuel through the nozzle to furnish a more precise dispensing of the quantity and value of the fuel being delivered to a vehicle.

Claims

1. A poppet valve accessory for use with a fuel dispensing nozzle having a lever for manipulation during fuel dispensing, and for delivery of fuel to a vehicle, said poppet valve accessory including a poppet stem, a poppet holder, a poppet seal disc within said poppet holder, and a body cap for the poppet accessory when installed within the nozzle, and said body cap and a main spring for use for normally biasing the poppet seal disc against a nozzle valve seat when said fuel nozzle is closed to prevent dispensing of fuel through the nozzle; a poppet skirt provided within said poppet valve accessory and arranged in alignment with the poppet valve accessory and said skirt connecting to the top of said poppet stem which when the nozzle lever is actuated, said poppet skirt is lifted and elevates the poppet seal disc off of said nozzle valve seat to initiate the delivery of fuel to a vehicle; said poppet skirt having a main body portion, said body portion having a central cavity provided therein and opened at the bottom of said poppet skirt, and closed at the top of said poppet skirt, wherein said poppet stem fits within the poppet skirt cavity during assembly of said accessory in preparation for usage; and an integral flange provided extending from the main body portion of said poppet skirt and having a diameter greater than the diameter of said main body portion, and said flange having an upper surface, said upper surface being an inclined surface so that as the poppet skirt contacts the poppet seal disc upon actuation of the nozzle lever for delivery of fuel from the nozzle, the poppet skirt inclined flange surface initially lifts an edge of the poppet seal disc off of the nozzle valve seat to provide an initial reduced flow of fuel for dispensing from the nozzle during operation.

2. The nozzle poppet valve accessory of claim 1, wherein the inclined surface of said upper surface of the poppet skirt flange is between approximately 1 degree to 7 degrees off the horizontal.

3. The nozzle poppet valve accessory of claim 2, wherein the inclined surface of the upper surface of said poppet skirt flange is between approximately 3 degrees to 4 degrees off the horizontal, whereby when the fuel nozzle is initially actuated or at the end of fueling providing, for a reduced flow of fuel from the nozzle during dispensing.

4. The nozzle poppet valve accessory of claim 1, wherein in said poppet skirt is made of a polymer.

5. The nozzle poppet valve accessory of claim 1, wherein said poppet skirt flange having a bottom surface, and reinforcement structure provided between the bottom surface of said flange and the poppet skirt main body portion to provide reinforcement to said flange during usage.

6. The nozzle poppet valve accessory of claim 5, wherein said reinforcement structure comprises a series of integral ribs.

7. The nozzle poppet valve accessory of claim 2, wherein said inclined surface of said poppet skirt flange tilts the poppet seal disc off of the nozzle valve seat to provide for a trickle flow of fuel from the fuel nozzle during or when completing dispensing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In referring to the drawings:

(2) FIG. 1 presents an isometric view of the fuel dispensing nozzle of this invention, and showing there above an exploded view of the various components that make up the poppet assembly of said invention;

(3) FIG. 2 is a further view of the separated components of the poppet assembly;

(4) FIG. 3 shows even greater detail in the components of the poppet assembly;

(5) FIG. 4 is an isometric view of one embodiment for the tilt poppet skirt of this invention;

(6) FIG. 5 is a front view thereof;

(7) FIG. 6 is a rear view thereof;

(8) FIG. 7 is a left side view of the poppet skirt;

(9) FIG. 8 is a right side view of the poppet skirt;

(10) FIG. 9 is a top view;

(11) FIG. 10 is a bottom view of the poppet skirt of FIG. 4; and

(12) FIG. 11 is an isometric view of a modification to the tilted poppet skirt of this invention;

(13) FIG. 12 is a front view thereof;

(14) FIG. 13 is a rear view thereof;

(15) FIG. 14 is a left side view;

(16) FIG. 15 is a right side view;

(17) FIG. 16 is a top view;

(18) FIG. 17 is a bottom view of the tilted poppet skirt of FIG. 11; and

(19) FIG. 18 is an isometric view of a further modified tilted poppet skirt of this invention;

(20) FIG. 19 is a front view thereof;

(21) FIG. 20 is a back view thereof;

(22) FIG. 21 is a left side view'

(23) FIG. 22 is a right side view;

(24) FIG. 23 is a top view; and

(25) FIG. 24 is a bottom view of the modified tilted poppet skirt of FIG. 18; and

(26) FIG. 25a shows the tilted poppet skirt of this invention embodied in the poppet assembly and arranged in its normally-closed position;

(27) FIG. 25b shows the tilted poppet skirt of this invention being slightly elevated by lifting of the nozzle handle where the tilted poppet is beginning to peel the poppet seal off of its valve sealing surface as provided within the nozzle; and

(28) FIG. 25c shows the tilted poppet skirt of this invention when the nozzle handle is fully elevated, forcing the poppet seal disc and poppet holder totally opened, thereby allowing for the full flow of fuel through the dispensing nozzle during refueling of a vehicle.

DESCRIPTION OF THE PREFERRED EMBODIMENT

(29) The concept of this invention is to provide a gasoline dispensing nozzle, as shown at 1, in FIG. 1, incorporating a modified type of poppet valve assembly 2, generally as shown in an exploded view, also as noted, disclosing its various components axially separated, as seen in FIG. 2. Usually, such a poppet valve assembly, when interconnected together, and assembled will fit within the poppet opening or chamber 3, within the nozzle 1, as partially shown in FIGS. 2 and 3, and the nozzle casting has a valve seat type of arrangement, as at 4, and upon which the poppet valve rests, as to be subsequently described, when the assembled valve is located within the chamber 3, and the nozzle body cap 5 is threadedly engaged in place. It can be seen that the nozzle body cap 5 has a threaded surface, as at 6, and engages within compatible threads 7 provided within the poppet opening of the said fuel dispensing nozzle. Thus, as known in the operation of a poppet valve, within a nozzle, when the poppet valve is lifted, by manual raising of the nozzle lever 8, the poppet valve opens, allowing for the dispensing of fuel, generally at full load, through the nozzle handle casting 1, and out of its spout 8a, as known in the art.

(30) When the poppet body cap 5 is threadedly engaged within the nozzle body 1, an O-ring 9 fits within the groove of 10 of the cap, in order to provide a fluidic seal between the cap and the nozzle body, when assembled.

(31) The main spring 11 locates partially within the cap chamber 12, and the spring, when compressed, biases against the poppet holder 13 and the poppet holder retains within its lower recess 14 the poppet seal disc 15. It is the poppet holder 13, and its seal disc 15, that are biased by means of the pressure of the spring 11, against the valve seat 4 of the nozzle body, during closure of the fuel dispensing nozzle, as when not in dispensing usage.

(32) The concept of this invention is generally embodied within the component identified as a tilt poppet skirt 16, having a main body housing 17 that fits through the aperture 18 of the seal disc, and locates within a center bore 19 provided within the poppet holder 4, as can be noted. The bottom part of the poppet skirt 16 includes a further cavity, as at 20, and it is into this cavity that the top of the poppet stem 21 locates, when assembled. In addition, the main body portion 17 of the poppet skirt includes an integral flange, as at 22, and the usage and functioning of this particular flange, in its specific construction, will be subsequently described.

(33) Since, as known in the art, that the poppet stem 21 extends below the fluid flow pad within the nozzle 1, and exteriorly, so as to bias against the front part of the nozzle lever 8, a packing nut 23 is next provided upon the stem, and has the packing spring 24 located within its cavity 25 while the poppet stem 21 extends through the packing nut 23, as can be seen, and through its spring 24, and further extends through the packing gland washer 26, the O-ring 27, and has its packing top 28 applied thereon, in addition to a further O-ring 29 before the packing seal 30 engages within the packing nut 23, in order to provide a fluidic seal for the stem 21, as it extends through these components, and contacts its bottom 31 against the front part of said nozzle lever 8, as known in the art.

(34) The concept of this invention, which is generally identified as a titled poppet valve, is generally constructed within the configuration of the poppet skirt 16, generally identified as the tilt poppet skirt of this invention.

(35) One embodiment of this tilt poppet skirt can be seen at 16a. It includes its main body portion 17a, which, as previously described, is closed at its top surface, as noted at 31. These can all be seen in FIGS. 4-10, as noted. Then, the bottom of the main body portion 17a has a cavity 20a which is receptive for receiving the top of the poppet stem 21, as previously reviewed. And, it can be seen that a flange 22a extends outwardly from its integral formation with the main body portion 17a, and has a greater diameter than the said body portion, as can be noted. Reinforcement between the flange 22a and the lower part of the main body portion 17a of the poppet skirt includes the reinforcements, in the form of ribs 32 to provide support for the flange to furnish its operative aspects when used in the poppet valve assembly of this invention. The essence of the invention is the provision of an upper surface, as at 33, for the identified flange, and which may have an inclination, slope, or incline of approximately 1 degree to 7 degrees off the horizontal, as at 34, so that when the poppet stem 21 is raised upwardly, through manipulation of the nozzle lever 8, the inclined surface biases against the poppet holder 13, and its seal disc 15, to skew or tilt its opening, from upon the nozzle valve seat 4, to allow for initially, or at the end of dispensing, of a miniscule flow or trickle of the fuel through the nozzle, so that more precise quantities or value of fuel can be dispensed, particularly by the self service customer, as can be understood. It is the biasing of the inclined surface 33 against that seal disc 15 that causes only the one side of the seal disc initially to raise off of the valve seat 4, to provide for this lower flow of fuel through the nozzle, until such time as the nozzle lever 8 is fully pulled upwardly, to completely remove the seal disc from its valve seat, to allow for the normal and full flow of fuel through the nozzle during normal dispensing of its gasoline, diesel fuel, or the like.

(36) This type of poppet skirt may be formed of an endurable material, such as rubber having a high durometer hardness, or of a polymer, such as polypropylene, polyurethane, or any other type of polymer molded material that can withstand constant usage, for the purposes as described herein.

(37) FIGS. 11-17 show a further embodiment for the poppet skirt 16b of this invention. It also includes a main body portion 17b having a closed top 35 and an extending flange 22b as can be noted. Various reinforcing ribs 36 are likewise shown, integral with the lower part of the main body portion 17b, as noted. And as can be further noted, in order to attain the attributes of this invention, the upper part of the integral flange 22b is inclined, as can be noted at 37, so that when the poppet stem 21, that fits within the bottom opening 20b of the skirt, is raised by means of the nozzle lever 8, that inclined surface 37 of the skirt 16b skews the seal disc 15, within its poppet holder 13, to allow for, initially, or at the end of dispensing a trickle flow of gasoline through and from the nozzle spout, as noted in FIG. 1, particularly when filing up the fuel tank of a vehicle. Once again, the incline of the upper surface of the flange 22b, will generally be within a range of from 1 degree to 7 degrees, and in the preferred embodiment, somewhere between approximately 3 degrees to 4 degrees off of the horizontal of the flange, as can be understood. This can clearly be seen in FIGS. 12 and 13.

(38) A further embodiment for the tilt poppet skirt for this invention can be seen at 16c, as noted in FIGS. 18-24. This skirt has related structure to that of the poppet skirt as previously reviewed, and includes a main body portion 17c, having a bottom part of the main body portion, as likewise noted at 17c, and with reinforcing ribs 38 provided to strengthen the structure during its application. This embodiment further includes its extending flange 22c, which is formed, upon its upper surface 39, with an incline, off of the horizontal, at the range of degrees as previously reviewed, such that, in operation, when the poppet skirt is lifted, by means of the stem 21, it elevates only a small portion of the poppet seal disc 15, within its poppet holder 13, off of the poppet valve seat 4, as previously reviewed, integrally provided within the nozzle 1, as where noted in FIGS. 2 and 3.

(39) Thus, the concept of this invention is to provide within a singular structure, and not through usage of multiple components, a means to slightly lift only a portion or segment of the poppet seal disc off of its nozzle valve seat, so as to allow for a minor flow of fuel, or a trickle flow, as known in the art, which can be achieved through usage of the inclined integral flanges, as previously reviewed, and as structured into the tilt poppet skirt of this invention.

(40) The usage of this invention, within a fuel dispensing nozzle, can be seen in FIGS. 25a-25c. As noted in 25a, the tilt poppet skirt 16 of this invention, locates within the poppet holder 13, and the poppet stem 21 locates within the poppet skirt, but since the lever 8 is at rest, and not being elevated or used, the seal disc 15 engaged upon the nozzle valve seat 4, while no fuel is being dispensed through the at rest nozzle. As can be seen in FIG. 25b, the lever 8 has been slightly elevated, and its stem 21 slightly pushes the poppet skirt 16 upwardly, a minor space, as at 40, so that only a small gap is provided at the location between the poppet holder 13 and its seal disc 15 to provider for a miniscule flow of fuel through the nozzle, when that condition is maintained. Then, as noted in FIG. 25c, when the nozzle lever 8 is fully elevated, and the stem 21 likewise is fully raised, the poppet skirt 16 fully elevates the poppet holder 13 and its located seal disc 15 upwardly, as against the compression of the main spring 11, furnishing a wide opening of the space between the seal disc, and the nozzle valve seat 4, such space as can be clearly seen at 41, to allow for the full flow of fuel through the nozzle when being dispensed into the fill pipe of a vehicle, during application of the dispensing system, and through usage of the invention as described herein. As noted, the functionality of this invention is generally as described for the embodiment, and in the condition of its usage, as shown and explained in FIG. 25b. As previously noted, the tilt poppet skirt employs that inclined surface of its flange, in order to peel the poppet holder and its seal disc off of the valve seat and sealing surface of the nozzle body casting, in order to provide for a slight opening between these components, that allows one to furnish a minor or trickle flow of fuel, in order to dispense fuel at a precise quantity, and value, generally known as rounding to the penny when dispensing fuel into a vehicle.

(41) Variations or modifications to the subject matter of this invention may occur 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. Such variations, if within the spirit of this invention, are intended to be encompassed within the scope of any claims to patent protection issuing herein. The disclosure of the invention in the drawings, and as described in the specification, are set forth for illustrative purposes only.