Reduced vibration cooling device having pneumatically-driven GM type displacer
US6256997A · kind A · utility
28Cited by
17References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2000 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Feb 15, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/13
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A GM type displacer has an elastomer "O" ring at the warm end to absorb impact energy when the displacer reaches the bottom of the stroke before it would hit the cylinder end cap. When the displacer reaches the top of its stroke, before the displacer would hit the internal mechanism of the expander, another elastomer "O" ring absorbs the kinetic energy of the displacer. Both absorbers are at or near ambient temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.