초록 ▼

A casing which provides a fluid and electrical interface between components of a fuel dispensing system. A column pipe which receives fuel pumped from an underground tank connects with a power head mounted in the casing. A check valve controls flow from the power head to a dispensing pipe leading to

A casing which provides a fluid and electrical interface between components of a fuel dispensing system. A column pipe which receives fuel pumped from an underground tank connects with a power head mounted in the casing. A check valve controls flow from the power head to a dispensing pipe leading to a fuel dispenser. A hand operated quick connect coupling connects the power head with the check valve housing to facilitate extraction of the power head, column pipe and pump. The check valve element can be removed along with a cover to the check valve housing. Leaking fuel and excessive fuel vapor are returned to the tank by valves. Fuel from the check valve housing used to operate a siphon system is returned to the tank along with fuel needed to relieve excessive pressure in the check valve housing. A junction box in the casing houses electrical wiring and is equipped with a safety barrier plug that accommodates a signal wire from a pressure transducer used to control the fuel flow to the dispenser.

대표청구항 ▼

[ Having thus described the invention, what is claimed is:] [1.]1. A fuel dispensing system having an underground tank for holding fuel, a column pipe extending from the tank, a pump for pumping fuel from the tank through the column pipe, a dispensing pipe for delivering the fuel to a dispenser, a p

[ Having thus described the invention, what is claimed is:] [1.]1. A fuel dispensing system having an underground tank for holding fuel, a column pipe extending from the tank, a pump for pumping fuel from the tank through the column pipe, a dispensing pipe for delivering the fuel to a dispenser, a power supply line connected with an electrical power source, and a power delivery line extending through the column pipe to deliver electrical power to the pump, wherein the improvement comprises:a fluid tight casing having a removable cover providing access to the interior of the casing when removed, said casing serving to confine fuel that leaks therein;a power head in said casing connected with the column pipe to receive fuel therefrom, said power head providing a flow path for directing the fuel toward said dispensing pipe;a check valve housing in said casing between said power head and dispensing pipe to direct fuel therebetween;a check valve for controlling flow from said flow path of the power head to the dispensing pipe;an enclosed junction box in said casing receiving said power delivery line;means in said casing for electrically connecting said delivery line in the junction box to said supply line in the power head in a manner to isolate all electrical lines from the fuel flowing in said casing;a discharge opening from said power head;an inlet opening to said check valve housing substantially aligned with said discharge opening;a releaseable coupling assembly including first and second coupling members connected respectively with the discharge opening and the inlet opening, said coupling members having mating ends which seal together in a coupled position to provide a sealed flow passage from the discharge opening to the inlet opening, said coupling assembly having a release position wherein said mating ends are separable to allow the power head to be extracted from the casing along with the column pipe and pump; andmeans for effecting the coupled and release positions by hand when the cover of the casing is removed.