Patent · US Expired

Rotationally molded subterranean tank with riser

US7178686B2 · kind B2 · utility

9Cited by
12References
4Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 23, 2002
Grant dateFeb 20, 2007
Priority date—
Expiry dateSep 3, 2023

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB29C41/04
  • WIPO fieldHandling
  • WIPO sectorMechanical engineering

Abstract

A subterranean tank assembly is provided which broadly includes a vessel, a cover, and a riser which is configured to permit the riser to be adjusted in axial length at the job site. The riser is configured to permit coupling of the cover to the topmost connector portion thereof and to a portal of the vessel. The riser includes a plurality of substantially parallel, axially spaced circumferentially extending flanges which mate with the rim of the portal surrounding the opening, whereby the flanges may be fastened to the vessel in lengths intermediate to the initial length of the riser without the necessity of altering the tank or the cover.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.