Issued Patents All Time
Showing 76–100 of 172 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8307669 | Multi-channel flat tube evaporator with improved condensate drainage | Alexander Lifson | 2012-11-13 |
| 8302673 | Parallel flow evaporator with spiral inlet manifold | Allen C. Kirkwood, Robert A. Chopko | 2012-11-06 |
| 8297065 | Thermally activated high efficiency heat pump | Igor Vaisman, Joseph J. Sangiovanni | 2012-10-30 |
| 8276395 | Pulse width modulation with reduced suction pressure to improve efficiency | Alexander Lifson | 2012-10-02 |
| 8240162 | Engine driven refrigerant compressor with pulse width modulation control | Alexander Lifson | 2012-08-14 |
| 8240161 | Suction valve pulse width modulation control based on compressor temperature | Alexander Lifson | 2012-08-14 |
| 8235101 | Parallel flow heat exchanger for heat pump applications | Alexander Lifson | 2012-08-07 |
| 8136364 | Refrigerant system with expansion device bypass | Alexander Lifson | 2012-03-20 |
| 8109102 | Adjustment of compressor operating limits | Alexander Lifson, Jason Scarcella | 2012-02-07 |
| 8109101 | Heating, ventilation, air conditioning and refrigeration system with multi-zone monitoring and diagnostics | Alexander Lifson | 2012-02-07 |
| 8096139 | Refrigerant system with variable speed drive | Alexander Lifson | 2012-01-17 |
| 8079229 | Economized refrigerant vapor compression system for water heating | Alexander Lifson | 2011-12-20 |
| 8079228 | Refrigerant system with multi-speed scroll compressor and economizer circuit | Alexander Lifson | 2011-12-20 |
| RE42966 | Tandem compressors with discharge valve on connecting lines | Alexander Lifson | 2011-11-29 |
| 7997092 | Refrigerant vapor compression system operating at or near zero load | Alexander Lifson | 2011-08-16 |
| 7997091 | Control scheme for multiple operating parameters in economized refrigerant system | Alexander Lifson, Thomas J. Dobmeier | 2011-08-16 |
| 7966838 | Suction modulation valve for refrigerant system with adjustable opening for pulse width modulation control | Alexander Lifson | 2011-06-28 |
| 7958737 | Method and control for preventing flooded starts in a heat pump | Alexander Lifson | 2011-06-14 |
| 7931073 | Heat exchanger with fluid expansion in header | Mikhail B. Gorbounov, Parmesh Verma, Robert A. Chopko, Allen C. Kirkwood | 2011-04-26 |
| 7921661 | Dehumidification system with multiple condensers and compound compressor | Alexander Lifson | 2011-04-12 |
| 7854137 | Variable speed compressor motor control for low speed operation | Alexander Lifson | 2010-12-21 |
| 7854140 | Reheat dehumidification system in variable speed applications | Alexander Lifson | 2010-12-21 |
| 7854136 | Automated drive for fan and refrigerant system | Thomas J. Dobmeier, Alexander Lifson | 2010-12-21 |
| 7836713 | Speed control of multiple components in refrigerant systems | Alexander Lifson, Richard G. Lord | 2010-11-23 |
| 7806171 | Parallel flow evaporator with spiral inlet manifold | Allen C. Kirkwood, Robert A. Chopko | 2010-10-05 |