Insulated transmission line for cryogenic media
US4303105A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1980 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Apr 24, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L59/141
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved insulated transmission line for the transfer of cryogenic media is disclosed comprising: a tubular heat shield, including at least three concentric, radially separated, corrugated metallic tubular members, that provides a first annular space between two of the tubular members wherein a multiple layer, fibrous insulating material is disposed under vacuum conditions; a second annular space between two of the tubular members, including the innermost of the tubular members, containing a liquid or gaseous cooling media; and a vacuum sealed, inner tubular space formed by the innermost tubular member; the improvement comprising: a plurality of corrugated metal pipes extending through such vacuum sealed inner tubular space and being spacially separated from each other and from the tubular heat shield for providing minimum heat conductance between the metal pipes, and between the metal pipes and the tubular heat shield, throughout their respective axial lengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.