Cavity sealing article and method
US5979902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Sep 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/168
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A cavity sealing article for use in a longitudinally extending cavity defined by cavity walls, the cavity having a cross-section within the cavity walls which is to be sealed at a predetermined location, comprises: (a) a driver comprising a crosslinked foamable polymer, the driver having a size, shape, and expansion ratio on foaming such that, when foamed within the cross-section of the cavity at the predetermined location, it substantially but incompletely occupies the cross-section of the cavity; and (b) a sealer comprising an uncrosslinked foamable polymer in intimate contact with the driver and surrounding the driver in the cross-section of the cavity, the sealer having a size, shape, and expansion ratio on foaming such that, when the cavity sealing article as a whole is foamed, the foamed sealer is forced into intimate and sealing contact with the cavity walls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.