Multi-ring plastic storage tanks and risers
US10442617B1 · kind B1 · utility
9Cited by
20References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2014 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Jul 28, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F2005/028
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A plastic article useful as a riser for a septic tank or as a water tank article is comprised of a multiplicity of plastic rings which are attached vertically to each other at joints. Ring pairs which alternately have inward and outward sloping conical walls nest within each other for shipment or storage. A lid is shaped for use with the topmost ring to cover the opening irrespective of which conical shape the ring has.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.