Fire-proof device for a tube of fusible material which extends through a wall
US4109423A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1977 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Apr 5, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/698
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The device comprises a case of a material non-deformable under the effect of heat and mounted on the wall around at least a part of the tube. A mass of material capable of swelling under the effect of heat is enclosed in the case. An element of a material which is substantially non-fusible at temperatures which are developed in the course of a fire has a part which is planar and perpendicular to a radial direction relative to the tube and is movable and slidable in said radial direction in the case. The element normally bears on the outer surface of the tube and the mass of swelling material is disposed on the opposite side of the element to the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.