System and method for sealing a tank opening
US7278439B2 · kind B2 · utility
4Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2002 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Nov 3, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86324
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
System for closing off an opening in a plastic tank, formed from a sheet of multilayer plastic that includes a barrier layer, the said sheet being welded around the perimeter of the opening and provided with a peripheral region that is slimmed down so as to effectively restrict the permeation of gases and liquids into the layer located between the tank and the barrier layer. Method of closing of a tank by welding such a plate, comprising the welding of the slimmed-down peripheral part by the technique of laser or infrared radiation welding. Use of the method to close off a fuel tank for a motor vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.