Issued Patents All Time
Showing 25 most recent of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12038214 | Method for improving gas bearing function at low thermal cooling power | Ivan Niell Deetlefs | 2024-07-16 |
| 11976864 | Dynamic frequency tuning for driving a free-piston gamma-type Stirling heat-pump at minimum electrical power input or maximum thermal cooling power depending upon current thermal conditions | — | 2024-05-07 |
| 11460325 | Method for and control system with piston amplitude recovery for free-piston machines | — | 2022-10-04 |
| 10775091 | Energy efficient biological freezer with vial management system | — | 2020-09-15 |
| 10718558 | Independent auxiliary thermosiphon for inexpensively extending active cooling to additional freezer interior walls | Todd Richards | 2020-07-21 |
| 10544978 | Energy efficient biological freezer with vial management system | — | 2020-01-28 |
| 10329822 | Door latch with opening and closing mechanical advantage | — | 2019-06-25 |
| 9587873 | Energy efficient biological freezer with vial management system | — | 2017-03-07 |
| 8752375 | Free-piston stirling machine in an opposed piston gamma configuration having improved stability, efficiency and control | — | 2014-06-17 |
| 8713934 | Lubricant free, reduced mass, free-piston, Stirling machine having reciprocating piston drivingly linked to rotary electromagnetic transducer moving in rotational oscillation | — | 2014-05-06 |
| 8671677 | Gamma type free-piston stirling machine configuration | — | 2014-03-18 |
| 8615993 | Bearing support system for free-piston stirling machines | Yong-Rak Kwon | 2013-12-31 |
| 8011183 | Resonant stator balancing of free piston machine coupled to linear motor or alternator | — | 2011-09-06 |
| 7784184 | Involute foil regenerator method | Neill Lane, Todd Cale, James Gary Wood | 2010-08-31 |
| 7692339 | Stirling cycle engine | Mamoru Saito | 2010-04-06 |
| 7171811 | Multiple-cylinder, free-piston, alpha configured stirling engines and heat pumps with stepped pistons | Yong-Rak Kwon | 2007-02-06 |
| 7073567 | Condenser evaporator and cooling device | — | 2006-07-11 |
| 7075292 | Apparatus for determining free piston position and an apparatus for controlling free piston position | Robert Lee Mash, II | 2006-07-11 |
| 6991023 | Involute foil regenerator | Neill Lane, Todd Cale, James Gary Wood | 2006-01-31 |
| 6701721 | Stirling engine driven heat pump with fluid interconnection | — | 2004-03-09 |
| 6550255 | Stirling refrigeration system with a thermosiphon heat exchanger | Arthur G. Rudick | 2003-04-22 |
| 6549408 | CPU cooling device using thermo-siphon | — | 2003-04-15 |
| 6422025 | Vibrationally isolated stirling cooler refrigeration system | Arthur G. Rudick, Dale E. Kiikka | 2002-07-23 |
| 5988994 | Angularly oscillating, variable displacement compressor | — | 1999-11-23 |
| 5642622 | Refrigerator with interior mounted heat pump | Dale E. Kiikka | 1997-07-01 |