Device for ensuring dynamic tightness, particulary for Stirling engine
US4335884A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1980 |
| Grant date | Jun 22, 1982 |
| Priority date | — |
| Expiry date | Jun 16, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02G2253/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a device for insuring the tight seal of a closed space filled with a gas at high pressure through one wall of which an outlet rod is positioned, said outlet rod being subject to reciprocating rectilinear movement. Between the walls of the closed space and the outlet rod, two dynamic seals and a rolling diaphragm are successively positioned. Between these two seals, the outlet rod has a shoulder such that in combination with two non-return valves, it acts as a pump which sucks the gas from the chamber formed by the intermediate seal and the rolling diaphragm and delivers this gas to the closed space, thereby maintaining a relatively low pressure on the rolling diaphragm despite leakage of the seals and valves. This invention is particularly applicable to Stirling engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.