Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8860381 | Balancing vibrations at harmonic frequencies by injecting harmonic balancing signals into the armature of a linear motor/alternator coupled to a Stirling machine | — | 2014-10-14 |
| 8800302 | Driving an active vibration balancer to minimize vibrations at the fundamental and harmonic frequencies | — | 2014-08-12 |
| 8307700 | Internal position and limit sensor for free piston machines | James Gary Wood | 2012-11-13 |
| 7701075 | Hybrid electrical power source combining stirling engine driven alternator with supplementing electrical energy storage | — | 2010-04-20 |
| 7633173 | Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator | Douglas E. Keiter | 2009-12-15 |
| 7511459 | Controller computing a virtual tuning capacitor for controlling a free-piston stirling engine driving a linear alternator | — | 2009-03-31 |
| 7453241 | Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator | Douglas E. Keiter | 2008-11-18 |
| 7372255 | Detection of the instantaneous position of a linearly reciprocating member using high frequency injection | — | 2008-05-13 |
| 7266947 | Temperature control for free-piston cryocooler with gas bearings | Douglas E. Keiter | 2007-09-11 |
| 6782700 | Transient temperature control system and method for preventing destructive collisions in free piston machines | Reuven Unger | 2004-08-31 |