US 5,490,419 A · Secondary containment system using flexible piping

Abstract

A sump-riser performing as a collection sump, as a riser for the corresponding tank and as a means for secondary containment for the tank's submersible pump, manway, and fittings. The sump-riser comprises a generally cylindrical sump base with an upright annular lip extending upwardly from an upper support surface; an extension riser including a lower annular riser lip which fits over and round the lip of the sump base; a cover for the extension riser; and an access or observation lid. The riser extension is detachable or removable from the sump base and may be inverted and inserted into the sump base for compact shipping. Score lines may be provided on the riser extension to serve as cutting guides for proper sizing and the sump base may be multi-sided to provide flat walls for accurate hole drilling for pipe and conduit entry.

Claims11

Dependent claims

A sump-riser apparatus for a pipeline system, said apparatus comprising:

a) a hollow collection sump base for collecting fuel leaking from a pipeline system, said sump base having upper and lower portions and at least one wall extending between said upper and lower portions, said sump base having at least a first diameter;
b) a riser extension mounted on said sump base, said riser extension having upper and lower portions;
c) said riser extension having a step portion disposed adjacent said lower portion of said riser extension, said step portion including an outwardly extending wall and a generally vertically extending wall;
said riser extension immediately above said outwardly extending wall having a first diameter, said first diameter of said riser extension being less than said first diameter of said sump base;
said outwardly extending wall being disposed directly adjacent said upper portion of said base;
and
d) a cover mounted on said riser extension, said cover having a diameter greater than said first diameter of said riser extension.

4 more elements

Dependencies are inferred from the claim text.

Secondary containment system using flexible piping

Life of this patent

Secondary containment system using flexible piping

Life of this patent

Abstract

Claims11