US 4,114,426 A · Liquid volumetric line leak testing apparatus

Abstract

The present apparatus includes a readily portable carrying case holding all of the equipment needed for detecting a leak in the gasoline line between an above-ground dispensing apparatus and an underground gasoline storage tank, substantially in accordance with my U.S. Pat. No. 3,910,102. The equipment in the carrying case includes a calibrated burette and a funnel for filling it through an opening in the top of the carrying case, a foot or hand operated pump mounted on the inside of the front cover of the case for withdrawing makeup gasoline from the burette, a 160 psi pressure gauge permanently connected to the outlet of this pump, a 15 psi pressure gauge and means for detachably connecting it to the outlet of this pump, an air bleed device and a permanent magnet for mounting it on the dispensing apparatus, a first long flexible hose connecting the pump outlet to the air bleed device, a second long flexible hose connected at one end to the air bleed device, a short connector for detachably connecting the opposite end of the second hose to the pumping system of the dispensing apparatus, an air bleed hose for passing air bubbles and entrained liquid from the air bleed device back to the top of the burette, and a pressure release hose with a normally closed valve extending from the high pressure gauge to the top of the burette.

Claims30

Dependent claims

In an apparatus for detecting a leak in a gasoline line extending from an above-ground gasoline dispensing apparatus down to an underground gasoline storage tank provided with a check valve for preventing return flow of gasoline back down into the tank, the combination of:

a carrying case having a cover which may be opened to expose the interior of the case;
a burette extending vertically inside said case;
a person-operated pump in said case having its inlet connected to the lower end of said burette to receive makeup gasoline therefrom;
pressure gauge means in said case operatively connected to the outlet of said pump to display the latter's output pressure;
an air bleed device in said case having means therein for separating air from liquid;
a first long flexible hose in said case operatively connected between the outlet of said pump and said air bleed device;
a second long flexible hose in said case connected to said air bleed device and in liquid communication thereat with said first hose;
coupling means in said case for connecting the opposite end of said second hose to said gasoline line at said dispensing apparatus;
an air bleed hose in said case operatively connected at one end to said air bleed device to receive air and entrained liquid therefrom;
and a bleed valve in said case operatively connected between said air bleed hose and the top of the burette to control the flow of air and entrained liquid from said air bleed device through said air bleed hose to the top of the burette.

7 more elements

a burette for holding makeup gasoline;
a person-operated pump having its inlet connected to the lower end of said burette to receive makeup gasoline therefrom;
pressure gauge means operatively connected to the outlet of said pump to display the latter's output pressure;
the improvement which comprises:
an air bleed device having means therein for separating air from liquid;
means for detachably mounting said air bleed device on the dispensing apparatus;
a first long flexible hose operatively connected between the outlet of said pump and said air bleed device;
a second long flexible hose connected to said air bleed device and in liquid communication thereat with said first hose;
coupling means for detachably connecting the opposite end of said second hose to said gasoline line at said dispensing apparatus;
an air bleed hose operatively connected at one end to said air bleed device to receive air and entrained liquid therefrom;
and a bleed valve operatively connected between said air bleed hose and the top of the burette to control the flow of air and entrained liquid from said air bleed device through said bleed hose to the top of the burette.

8 more elements

Dependencies are inferred from the claim text.

Liquid volumetric line leak testing apparatus

Life of this patent

Liquid volumetric line leak testing apparatus

Life of this patent

Abstract

Claims30