Prevention of freeze damage to liquid conduits
US4321908A · kind A · utility
11Cited by
11References
27Claims
0Family size
Inventor
Key dates
| Filing date | May 16, 1980 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | May 16, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1189
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Freeze damage to pipes containing liquids is accomplished by including in the interior of the pipe an elongated section of tubing sealed at each end and containing internally an inert gas under pressure; a means for attaching one end of the tubing to the pipe to prevent linear axial movement of the tubing and a means at the other end of the tubing to maintain it concentrically within the pipe and to permit safe linear axial expansion of the tubing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.