Cryogenics
US5829270A · kind A · utility
4Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1997 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Apr 29, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2290/42
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A refrigerator for cooling a sample comprises a container for holding liquid helium refrigerant to cool the sample. First cooling means is provided for cooling a condensation region with liquid helium coolant whereby helium refrigerant condenses on the condensation region and collects in the container. A sorption pump pumps gaseous helium refrigerant from the container. Second cooling means is provided for cooling the sorption pump with the liquid helium coolant. The first and second cooling means are connected in series with a source of the liquid helium coolant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.