Large-diameter insulated pipe
US4114657A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1977 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Sep 27, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L59/143
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The insulated pipe comprises an inner pipe and a foam of thermally insulating plastics material which adheres to the inner pipe and to an outer protective layer. The foam material covers the major part of the inner pipe but terminates at a distance from each end thereof in a portion having an inclined surface of frustoconical shape. The outer protective layer comprises a cover which is relatively rigid and terminates before reaching each frustoconical surface and a protective case for each frustoconical surface of the foam material. The case is at one end fixed to the cover and at the other end integral with the inner pipe. The case has sufficient elasticity to allow the foam to follow the expansion of the inner pipe while the cover remains immobilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.