Filling station equipment for fumes emission prevention
OwnerToby Argandonainventor
Life of this patent
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Abstract
Filling station equipment eliminates or reduces fumes emission by the provision of a drop tube which extends below the surface level of fuel in an underground tank, and by provision of a seal between the drop tube and a riser pipe, thus to prevent passage and emission of fumes between the drop tube and the riser pipe.
Claims16
A containment system for a filling station to prevent outflow of fumes from an underground tank, a drop tube and containment box, and to direct fuel input via the drop tube to the tank, said system comprising:
- an underground fuel tank,
- a riser pipe extending from the tank to the containment box, and
- a drop tube within the riser pipe and extending below a fuel level in the tank to introduce fuel therebelow,
- said riser and drop tube being closed at their upper end portions to prevent passage of fumes therebetween and emissions therefrom,
- whereby fuel input to the tank and any in the containment box flow directly via the drop tube to beneath the surface of fuel in the tank, and fumes are not emitted between the riser pipe and the drop tube, and liquid fuel cannot pass downwardly in the riser pipe and the drop tube.
A containment system for an underground fuel tank, a drop tube extending therefrom, and a containment box at an upper end of the drop tube, said system comprising:
- an underground fuel supply tank,
- a riser pipe extending upwardly from the tank to the containment box,
- a mounting member supporting the containment box at an upper end of the riser pipe,
- said drop tube being concentric within the riser pipe and extending below a surface level of fuel in the tank, and
- sealing means between the upper end portions of the riser pipe and the drop tube to prevent passage of liquid fuel therebetween to the tank and fumes therebetween, and to pass liquid fuel via the drop tube to beneath a level of fuel in the tank.
Dependencies are inferred from the claim text.