Center-porting and bearing system for free-piston stirling engines
US4404802A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1981 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Sep 14, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02G1/0435
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The displacer and piston of a Stirling engine are provided with inner cylindrical walls which serve as bearing surfaces in close fitting, sliding engagement with the outer bearing surface of a longitudinally extending, tubular center post. The internal bore of the center post is in fluid communication with the bounce space. Center porting is provided by passages in the piston, displacer and tubular wall of the center post so that fluid communication is provided periodically between the work space and bounce space and between the displacer gas spring and the bounce space. In this manner, the piston and displacer remain properly positioned within the engine housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.