Cryogenic refrigeration system for cooling a specimen
US4827736A · kind A · utility
19Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Jul 6, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A cryogenic refrigeration system for cooling specimen, wherein an expander having one or more heat stations and a cooler at a main refrigeration circuit, which has a specimen mounting unit and is cooled at a temperature lower than the heat station, are housed in first and second vacuum chambers separate from each other, and at the second vacuum chamber is provided an open-close lid which is open to enable a specimen to be taken in or out, whereby the second vacuum chamber only is broken of its vacuum so as to enable the specimen to be exchanged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.