Issued Patents All Time
Showing 101–125 of 172 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7721562 | Refrigerant system with multi-speed scroll compressor and economizer circuit | Alexander Lifson | 2010-05-25 |
| 7540163 | Prevention of flooded starts in heat pumps | Alexander Lifson | 2009-06-02 |
| 7523623 | Heat pump with reheat and economizer functions | Alexander Lifson | 2009-04-28 |
| 7481069 | Controlling a voltage-to-frequency ratio for a variable speed drive in refrigerant systems | Alexander Lifson | 2009-01-27 |
| 7469555 | Multiple condenser reheat system with tandem compressors | Alexander Lifson | 2008-12-30 |
| 7398819 | Minichannel heat exchanger with restrictive inserts | Allen C. Kirkwood, Robert A. Chopko, Mikhail B. Gorbounov, Igor Vaisman, Parmesh Verma | 2008-07-15 |
| 7343750 | Diagnosing a loss of refrigerant charge in a refrigerant system | Alexander Lifson | 2008-03-18 |
| 7342756 | Fault recognition in systems with multiple circuits | Alexander Lifson, Howard H. Fraser, Jr. | 2008-03-11 |
| 7325414 | Hybrid tandem compressor system with economizer circuit and reheat function for multi-level cooling | Alexander Lifson | 2008-02-05 |
| 7300257 | Prevention of unpowered reverse rotation in compressors | Alexander Lifson | 2007-11-27 |
| 7290399 | Multi-circuit dehumidification heat pump system | Alexander Lifson | 2007-11-06 |
| 7287394 | Refrigerant heat pump with reheat circuit | Alexander Lifson | 2007-10-30 |
| 7275384 | Heat pump with reheat circuit | Alexander Lifson | 2007-10-02 |
| 7272948 | Heat pump with reheat and economizer functions | Alexander Lifson | 2007-09-25 |
| 7257955 | Discharge valve to increase heating capacity of heat pumps | Alexander Lifson | 2007-08-21 |
| 7257957 | Utilization of bypass refrigerant to provide reheat and dehumidification function in refrigerant system | Alexander Lifson | 2007-08-21 |
| 7251947 | Refrigerant system with suction line restrictor for capacity correction | Alexander Lifson | 2007-08-07 |
| 7234311 | Prevention of compressor unpowered reverse rotation in heat pump units | Alexander Lifson | 2007-06-26 |
| 7231774 | Multi-circuit refrigerant cycle with dehumidification improvements | Alexander Lifson | 2007-06-19 |
| 7228708 | Multi-temp system with tandem compressors and reheat function | Alexander Lifson | 2007-06-12 |
| 7228711 | Tubes with elongated cross-section for flooded evaporators and condensers | Howard H. Fraser, Jr. | 2007-06-12 |
| 7228707 | Hybrid tandem compressor system with multiple evaporators and economizer circuit | Alexander Lifson | 2007-06-12 |
| 7204099 | Refrigerant system with vapor injection and liquid injection through separate passages | Alexander Lifson | 2007-04-17 |
| 7201008 | Vapor compression system performance enhancement and discharge temperature reduction in the unloaded mode of operation | Alexander Lifson | 2007-04-10 |
| 7197890 | Valve for preventing unpowered reverse run at shutdown | Alexander Lifson, Thomas J. Dobmeier | 2007-04-03 |