초록 ▼

A pipe system for supplying liquid fuel to a underground tank from a supply station and for transfer of said fuel from said tank to at least one dispensing station, said system comprising an assembly of flexible inner piping through which the fuel flows and an assembly of flexible outer piping envel

A pipe system for supplying liquid fuel to a underground tank from a supply station and for transfer of said fuel from said tank to at least one dispensing station, said system comprising an assembly of flexible inner piping through which the fuel flows and an assembly of flexible outer piping enveloping the inner piping. The assembly of outer piping is continuous and envelops the inner piping along its entire length without interruption between the supply station and the underground tank and/or between said tank and the dispensing station and advantageously with the inner piping centered within the outer piping by means of concentric spacers perforated to allow gasoline leaking thereinto to flow therepast along the thus formed annular spacing, and preferably also with a branch bypass pipe to interconnect the annular spacing of the outlet conduit with the annular spacing of the inlet conduit to allow collection of gasoline leaking into such spacings into a common gravity fed cup.

대표청구항 ▼

[ What is claimed is:] [1.] A pipe system for filling an underground tank with liquid fuel from a supply ground level station and for transferring liquid fuel between an underground tank and at least one dispensing ground level station through which fuel is delivered, said system comprising:flexible

[ What is claimed is:] [1.] A pipe system for filling an underground tank with liquid fuel from a supply ground level station and for transferring liquid fuel between an underground tank and at least one dispensing ground level station through which fuel is delivered, said system comprising:flexible inner piping,flexible outer piping,at least one coaxial assembly of said inner and outer piping extending between said tank and said dispensing ground level station and one coaxial assembly of said inner and outer piping extending between said tank and said supply station, with said outer piping of each assembly being continuous and protectively enveloping the inner piping of the respective assembly along its entire length without interruption from adjacent said tank to adjacent said respective ground level station with the annular spacing between said inner and outer piping being sufficient for said inner piping to be removable from said outer piping and for any fuel escaping from the inner piping to be retained within and flow along said outer piping,a rigid annular cup located at said tank at the downstream end of and coaxial with the inner piping and defining the downstream end of the respective annular spacing which extends between said tank and said supply station, anda branch piping which is in communication, through the outer piping interconnecting the underground tank with the dispensing station, with the upstream end of such outer piping and further communicates with said cup, with said branch pipe being disposed so that any fuel leaking from the corresponding inner pipe is removed to said cup by gravity.