Test port for fuel dispenser

Abstract

A permanent test port mounting in a conventional gasoline/diesel fuel dispenser to provide a technician access to the fuel line and perform various tests that enables testing to occur at a highline point in the line system to include all or at least more of the line system head pressure than has been possible before. In particular, the test port has a quick connect/disconnect fitting disposed in a collar intermediate a mounting for a filter in a conventional gasoline/diesel fuel dispenser and the filter to provide a technician access to the fuel line and perform various tests. The quick connect/disconnect fitting may also be coupled to a hose for draining fuel under pressure into a safety can to prevent spillage during replacement of the filter. The safety can may be emptied into the fuel tank to conserve the fuel, prevent polluting the environment and as a safety measure.

Claims

1. A method for testing a gasoline/diesel fuel dispenser at a fueling site, said method comprising the steps of: (a) locating a test port in fluid communication with the continuously pressurized portion of the fuel dispenser at the fueling site by locating the test port with a collar having a threaded coupling for a threaded filter; (b) selectively engaging a quick connect fitting with the test port to perform tests; and (c) optionally testing a conventional mechanical line leak detector through the test port.

2. The method of claim 1 wherein said step of selectively engaging a quick connect fitting is carried out on a quick connect port in the collar.

3. The method of claim 1 further comprising the step of engaging a cavity in the collar with a peg.

4. The method of claim 1 further comprising the step of placing a compressible seal intermediate the collar threaded coupling to prevent leakage of fuel.

5. A method for testing a gasoline/diesel fuel dispenser at a fueling site, said method comprising the steps of: (a) locating a test port in fluid communication with the continuously pressurized portion of the fuel dispenser at the fueling site; (b) selectively engaging a quick connect fitting with the test port to perform tests; (c) optionally testing a conventional mechanical line leak detector through the test port; and (d) further selectively engaging another quick connect fitting with the test port via at least a second quick connect port in the test port.

6. The method of claim 1 further comprising the step of covering the quick connect fitting with a removable cover.

7. A method for testing a gasoline/diesel fuel dispenser at a fueling site, said method comprising the steps of: (a) locating a test port in fluid communication with the continuously pressurized portion of the fuel dispenser at the fueling site; (b) selectively engaging a quick connect fitting with the test port to perform tests; (c) optionally testing a conventional mechanical line leak detector through the test port; and (d) draining fuel under pressure from the test port.

8. The method of claim 7 wherein said step of draining is carried out via attaching a detachable tubing to the quick connect.

9. A method for testing a conventional fueling site gasoline/diesel dispenser fluid line under pressure via a hollow threaded coupling in a filter collar, said method comprising the steps of: (a) locating a test port in the filter collar in fluid communication with the continuously pressurized portion of the fuel dispenser at the fueling site; (b) selectively engaging a quick connect fitting with the test port to perform tests; (c) optionally testing a conventional mechanical line leak detector through the test port; and (d) placing a compressible seal intermediate the collar threaded coupling to prevent leakage of fuel.

10. The method of claim 9 further comprising the step of engaging a cavity in the collar with a peg.

11. The method of claim 9 further comprising the step of further selectively engaging another quick connect fitting with the test port via at least a second quick connect port in the test port.

12. The method of claim 9 further comprising the step of covering the quick connect fitting with a removable cover.

13. A method for testing a conventional fueling site gasoline/diesel dispenser fluid line under pressure via a hollow threaded coupling in a filter collar, said method comprising the steps of: (a) locating a test port in the filter collar in fluid communication with the continuously pressurized portion of the fuel dispenser at the fueling site; (b) selectively engaging a quick connect fitting with the test port to perform tests; (c) optionally testing a conventional mechanical line leak detector through the test port; and (d) draining fuel under pressure from the test port.

14. The method of claim 13 wherein said step of draining is carried out via attaching a detachable tubing to the quick connect.

15. The method of claim 5 further comprising the step of covering the quick connect fitting with a removable cover.

16. The method of claim 5 further comprising the step of engaging a cavity in the collar with a peg.

17. The method of claim 5 further comprising the step of placing a compressible seal intermediate the collar threaded coupling to prevent leakage of fuel.

18. The method of claim 5 further comprising the step of draining fuel under pressure from the test port.

19. The method of claim 7 further comprising the step of covering the quick connect fitting with a removable cover.

20. The method of claim 7 further comprising the step of placing a compressible seal intermediate the collar threaded coupling to prevent leakage of fuel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present invention will be described with greater specificity and clarity with reference to the following drawings, in which:

(2) FIG. 1 illustrates some of the structure within a conventional gasoline/diesel fuel dispenser and particularly the location of a fluid filter supported from a collar embodying the present invention;

(3) FIG. 2 illustrates the collar disposed intermediate a conventional filter mounting and a filter, along with a fuel discharge tube;

(4) FIG. 3 illustrates a partial cross-section of the collar;

(5) FIG. 4 is a top view of the collar taken along lines 4-4, shown in FIG. 3;

(6) FIG. 5 is an exploded view of the components attendant the present invention;

(7) FIG. 6 is an exploded view of the collar and a fitting for threadedly securing the collar in place;

(8) FIG. 7 illustrates the quick connect fitting with a cover secured to the collar; and

(9) FIGS. 8A and 8B illustrate the male quick connect fitting serving as a test probe and the attachment of a female quick connect fitting supporting a drain hose.

(10) FIG. 9 illustrates a diagram of conventional petroleum fueling site as is commonly known in the art.

DESCRIPTION OF THE PREFERRED EMBODIMENT

(11) Referring to FIG. 1, there is a partial illustration of a conventional gasoline/diesel fuel dispenser. For purposes of clarity to describe the interaction of the present invention with the fuel flow through the dispenser, the interior of the dispenser is illustrated after removal of one or more front panels. Dispenser 10 includes a cabinet 12 secured to ground 14, which is usually of cement. A plurality of one or more pipes 16, 18, 20 and 22 extend into the ground for communication with the fuel tank, whether above or below ground. Additionally, these pipes may perform other functions attendant the dispensing of fuel. Dispensing handle 24 is in fluid communication with a hose 26 to convey fuel from within dispenser 10 into the fuel tank of a vehicle or other depository. A second or more handles 28 connected to respective hoses 30 also convey fuel to a vehicle or other depository. Usually, each handle provides a different grade or type of fuel. The hoses are connected to a source of fuel within dispenser 10.

(12) Referring jointly to FIGS. 1 and 2, a portion of dispenser 10 relevant to the present invention is illustrated in FIG. 2. Normally, a conduit 40 conveys fuel to be dispensed through a threaded coupling 42 into a conventional filter 44 and back into conduit 46 for ultimate discharge through one of the hoses (26, 30) and respective handles (24, 28). In the present invention, a collar 50 is in threaded engagement with threaded coupling 42. The collar supports filter 44 through a threaded engagement. Thereby, the filter may be periodically changed by unthreading the filter from the collar and replaced by a new filter threaded engaged with the collar. A quick disconnect fitting 52 is in threaded engagement with a threaded passageway of collar 50 and in fluid communication with the fuel in the interior of the collar. Cavities 68 and threaded plugs 86 are further shown in FIG. 6.

(13) During testing, tubing 54 is temporarily connected with quick disconnect fitting 52 to relieve the pressure of the fuel within conduit 40. The fuel flowing through the tubing is discharged into a suitable container, such as cup 56. For safety reasons, a clamp 58 or the like may be used to secure end 60 of the tubing to the cup to prevent spillage. Once the pressure within conduit 40 has been relieved, further outflow of fuel through tubing 54 will not occur. On completion of subsequent tests to be performed, the contents of cup 56 may be returned to the main fuel tank (not shown) or other depository.

(14) Referring jointly to FIGS. 4 and 5, details attendant collar 50 will be described. Coupling 42 includes a threaded hollow boss 62 of a conventional size and thread to threadedly engage with threads 64 in filter 44. Collar 50 includes internal threads 66 for threadedly engaging hollow boss 62 to mount collar 50 onto coupling 42. The collar includes a plurality of cavities, of which cavities 68 and 70 are shown. A rod 72 may be inserted into one of the cavities to assist in stabilizing the collar during threaded attachment and detachment of filter 44. One or more seals 74 may be disposed intermediate the collar and coupling to ensure a leak-free engagement. Collar 50 includes a depending threaded hollow boss 76 for engagement with threads 64 in filter 44. A plurality of vertical passageways 78 extend through collar 50. These passageways are in fluid communication with a plurality of conventional inlets 80 disposed in filler 44. A seal 82 may be employed about the rim of the filter to ensure a leak-free fit between the filter and the collar.

(15) In operation, fuel flowing through conduit 40 enters coupling 42 and is distributed into vertical passageways 78. The fuel then flows into filter 44 through inlets 80 and through the filter element within filter 44 to exit through hollow boss 76 and into hollow boss 62 of coupling 42. Thereafter, the fuel is channeled into conduit 46 for ultimate dispensation through one of the hoses of the dispenser and through the respective handle.

(16) As described above, collar 50 threadedly supports a filter for the fuel to be dispensed. The collar is threadedly secured to coupling 42. Previously, only filters mating with coupling 42 could be used. The use of a collar, intermediate the coupling and the filter, permits use of a collar that is configured to threadedly engage a filter other than what would be required to mate with coupling 42. Thereby, collar 50 can be reconfigured for use in the manner of an adapter to secure various fillers to the coupling.

(17) Collar 50 includes a plurality of threaded passageways 84. Each unused ones of these through the passageways is sealed by a threaded plug 84. Quick disconnect fitting 52 includes a hollow threaded end 88 for threaded engagement with one of threaded passageways 84. Thereby, the quick disconnect fitting is in fluid communication with the interior of collar 50 and the fluid therein. The quick disconnect filling will prevent fuel flow therethrough until it is engaged by the mating half of the quick disconnect fitting.

(18) Referring to FIGS. 5 and 6, there is shown an apparatus for firmly attaching collar 50 to coupling 42. An installation tool 110 may include two or more pegs 112 extending therefrom. The installation tool includes a cavity 114 for receiving threaded hollow boss 76. Pegs 112 mate with corresponding ones of passageways 78. A socket 116 is disposed in the installation tool to permit use of a wrench to tightly secure collar 50 with coupling 42.

(19) It is noted that rod 72 engaging a corresponding one of cavity 68 in the collar may be used to threadedly engage the collar with coupling 42. However, it is preferable to use installation tool 110 to secure the collar with the coupling. To ensure sealed engagement between filter 44 and collar 50, the rod may be used to stabilize the collar while the filter is attached and detached through use of a conventional strap wrench. Thereby, even partial disengagement of the collar from the coupling is avoided by stabilizing the coupling with rod 72 during unthreading of the filter from the collar. The quick disconnect fitting and cylinder 96 serving as a cover with attached lanyard 102 are shown in FIG. 6.

(20) FIGS. 7, 8A and 8B are simplified figures to further show the quick disconnect fitting and its function. In particular, FIG. 7 illustrates cylinder 96 covering quick disconnect fitting 52 to protect it and to prevent contamination by dirt, etc. FIGS. 8A and 8B show quick disconnect fitting 52 with the cover removed and prior to engagement with female fitting 90.

(21) For reference, FIG. 9 illustrates an exemplary plan of a common petroleum fueling site as would be understood by anyone having an ordinary skill in the art. Fueling site 1 includes multiple underground storage tanks 5 that are connected to fuel dispensers 10 (stationed on platform 3) via fuel lines 2. Pumps in the tanks cause fuel to pass by line leak detectors, such as mechanical line leak detectors 7, under pressure, along lines 2 to dispensers 10 for dispensation.