Piston sealing arrangement for a cryogenic refrigerator
US4432556A · kind A · utility
8Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1983 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Jun 1, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/91
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A sealing arrangement for a rectilinear reciprocable piston within a cryoic refrigerator comprising a buffer defined by dual O-rings disposed around the circumference of the piston and containing pressurized gas of the same type as the refrigeration gas. The buffer limits or prevents both the entrance of contaminants and also the escape of the refrigeration gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.