Fluid-tight bell-and-spigot-joint for box culverts
US7137756B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 2005 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Oct 27, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F5/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A box culvert and gasket assembly is provided that enables fluid-tight bell-and spigot joints to be formed between abutting ends of box culverts. The joints according to the assembly of the present invention can remain fluid-tight up to at least 13 psi of water pressure. The gasket is preferably a one-piece, endless rubber gasket that is applied over the end of a spigot that is rectangular in end elevation. The corners of the rectangular spigot are rounded to enable the gasket to extend continuously over the corner without the need for 45° cuts and splices. Preferably, the gasket is made from a single elongate gasket piece that is cut to size and that has ends that are bonded together via a butt vulcanization technique. A storm drain and sewer assembly and a method of forming a fluid-tight bell-and spigot joint are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.