Fire retardant partitioning for openings for plastic pipe lines
US4307546A · kind A · utility
17Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | May 8, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1834
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Partitioning for preventing the spread of fire or smoke through wall apertures created by the burning of plastic pipe. Pre-stressed metal squeezing elements are retained by plastic bolts which melt at about 120.degree. C., releasing the squeezing elements and permitting them to squeeze together the heat-softened plastic pipe. An insert of foamable material may additionally be used to supplement the aperture sealing effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.