|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||141/086 ; 220/571|
|발명자 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 10 인용 특허 : 4|
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.
[ The inventor claims:] [1.]1. 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, anda 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 th...