Patent ID: 7073976

Claim:
An under-dispenser containment sump comprising: a chamber for disposition beneath a fuel dispenser, said chamber having an open upper end and a closed bottom wherein the open upper end is joined to said fuel dispenser at its base; said chamber further comprising one or more angular side walls, said one or more angular side walls comprising at least first and second segments between said closed bottom and said upper end, neither of which segments is perpendicular to said closed bottom, said first segment forming an oblique angle with reference to the bottom of the chamber, said angle being more than ninety degrees with reference to the bottom such that said first segment extends upward and outward from said bottom; said second segment extending upward and inward at an angle from said first segment, returning inward toward a vertical axis through the chamber at its geometric center, wherein said chamber includes a shear valve and an inlet port, and wherein the shear valve connects to the fuel dispenser, and the inlet port connects to the shear valve and is disposed to extend downward from the fuel dispenser and forms an obtuse angle relative to a longitudinal axis of the shear valve.