Free piston stirling machine having variable spring between displacer and piston for power control and stroke limiting
US5385021A · kind A · utility
14Cited by
14References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1992 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Aug 20, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2309/001
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Free piston Stirling coolers and engines are improved by a spring coupling the displacer to the piston and having a variable spring constant. Controllable variation of its spring constant permits controllable variation of displacer stroke, engine power output and cooler thermal pumping rate and thus the invention is useful for stroke limiting and load matching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.