Assignee
LIFSON ALEXANDER
US·28 granted patents·35 pending applications·167 citations·filing 2004–2010
Top patents by PatentIndex Score
63 records- 0196US8079229B2Economized refrigerant vapor compression system for water heatingLIFSON ALEXANDER·Filed 2005·Granted Dec 20, 2011·43 cites·18 claims
- 0295US8079228B2Refrigerant system with multi-speed scroll compressor and economizer circuitLIFSON ALEXANDER·Filed 2009·Granted Dec 20, 2011·24 cites·1 claims
- 0394US8528359B2Economized refrigeration cycle with expanderLIFSON ALEXANDER·Filed 2006·Granted Sep 10, 2013·27 cites·19 claims
- 0494US8136364B2Refrigerant system with expansion device bypassLIFSON ALEXANDER·Filed 2006·Granted Mar 20, 2012·28 cites·19 claims
- 0578US9200811B2System and method for control of heat system operation by changing a switching set point of operationLIFSON ALEXANDER·Filed 2005·Granted Dec 1, 2015·8 cites·7 claims
- 0678US8316657B2Refrigerant system and control methodLIFSON ALEXANDER·Filed 2007·Granted Nov 27, 2012·6 cites·20 claims
- 0776US8276395B2Pulse width modulation with reduced suction pressure to improve efficiencyLIFSON ALEXANDER·Filed 2007·Granted Oct 2, 2012·5 cites·14 claims
- 0874US8904813B2Pulse width modulated system with pressure regulating valveLIFSON ALEXANDER·Filed 2005·Granted Dec 9, 2014·4 cites·14 claims
- 0974US8069683B2Refrigerant system unloading by-pass into evaporator inletLIFSON ALEXANDER·Filed 2006·Granted Dec 6, 2011·4 cites·15 claims
- 1072US8240161B2Suction valve pulse width modulation control based on compressor temperatureLIFSON ALEXANDER·Filed 2006·Granted Aug 14, 2012·3 cites·20 claims
- 1171US8424328B2Suction valve pulse width modulation control based on evaporator or condenser pressureLIFSON ALEXANDER·Filed 2005·Granted Apr 23, 2013·3 cites·18 claims
- 1268US8109102B2Adjustment of compressor operating limitsLIFSON ALEXANDER·Filed 2007·Granted Feb 7, 2012·2 cites·20 claims
- 1367US9890982B2Discrete frequency operation for unit capacity controlLIFSON ALEXANDER·Filed 2009·Granted Feb 13, 2018·3 cites·7 claims
- 1466USRE42966ETandem compressors with discharge valve on connecting linesLIFSON ALEXANDER·Filed 2006·Granted Nov 29, 2011·1 cites·13 claims
- 1565US9677788B2Refrigerant system with multiple load modesLIFSON ALEXANDER·Filed 2010·Granted Jun 13, 2017·1 cites·18 claims
- 1665US8292599B2Compressor reverse rotation of variable duration on start-upLIFSON ALEXANDER·Filed 2007·Granted Oct 23, 2012·2 cites·28 claims
- 1764US9494352B2Refrigerant system with control to address flooded compressor operationLIFSON ALEXANDER·Filed 2006·Granted Nov 15, 2016·1 cites·9 claims
- 1864US8661846B2Restriction in vapor injection lineLIFSON ALEXANDER·Filed 2005·Granted Mar 4, 2014·1 cites·13 claims
- 1959US8956135B2Screw compressor with asymmetric portsLIFSON ALEXANDER·Filed 2009·Granted Feb 17, 2015·1 cites·14 claims
- 2058US8726679B2Dedicated pulsing valve for compressor cylinderLIFSON ALEXANDER·Filed 2009·Granted May 20, 2014·0 cites·15 claims
- 2156US8925336B2Refrigerant system performance enhancement by subcooling at intermediate temperaturesLIFSON ALEXANDER·Filed 2008·Granted Jan 6, 2015·0 cites·11 claims
- 2255US8584487B2Refrigerant system with expander speed controlLIFSON ALEXANDER·Filed 2007·Granted Nov 19, 2013·0 cites·2 claims
- 2354US10006681B2Pulse width modulation with discharge to suction bypassLIFSON ALEXANDER·Filed 2006·Granted Jun 26, 2018·0 cites·13 claims
- 2454US9139066B2Combined operation and control of suction modulation and pulse width modulation valvesLIFSON ALEXANDER·Filed 2007·Granted Sep 22, 2015·0 cites·14 claims
- 2554US8337176B2Tandem compressors with common intermediate portLIFSON ALEXANDER·Filed 2006·Granted Dec 25, 2012·0 cites·16 claims
- 2654US2008314057A1Refrigerant System With Variable Speed Scroll Compressor and Economizer CircuitLIFSON ALEXANDER·Filed 2005·Application pending·0 cites
- 2754US2010199715A1Refrigerant system with bypass line and dedicated economized flow compression chamberLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 2854US2012266610A1Performance and position monitoring of a mobile hvac&r unitLIFSON ALEXANDER·Filed 2010·Application pending·0 cites
- 2954US2011314845A1Tadem compressor operationLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 3054US2010242509A1Air routing for simultaneous heating and coolingLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 3154US2011214439A1Tandem compressor of different typesLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 3254US2011094259A1Multi-stage refrigerant system with different compressor typesLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 3354US2011209485A1Suction superheat conrol based on refrigerant condition at dischargeLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 3453US9995516B2Superheat control for HVACandR systemsLIFSON ALEXANDER·Filed 2006·Granted Jun 12, 2018·0 cites·49 claims
- 3553US9464835B2Remote software loading for refrigerant systemLIFSON ALEXANDER·Filed 2006·Granted Oct 11, 2016·0 cites·21 claims
- 3653US2010024470A1Refrigerant injection above critical point in a transcritical refrigerant systemLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 3753US2010139298A1Motor-compressor drive apparatusLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 3853US2010011787A1Prevention of refrigerant solidificationLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 3953US2010031677A1Refrigerant system with variable capacity expanderLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 4052US2010083677A1Economized refrigerant system utilizing expander with intermediate pressure portLIFSON ALEXANDER·Filed 2007·Application pending·0 cites
- 4152US2009012651A1Including Energy Price in Optimizing Refrigerant System OperationLIFSON ALEXANDER·Filed 2006·Application pending·0 cites
- 4252US2010000239A1Pulse width modulation control for heat pump fan to eliminate cold blowLIFSON ALEXANDER·Filed 2006·Application pending·0 cites
- 4352US2010058781A1Refrigerant system with economizer, intercooler and multi-stage compressorLIFSON ALEXANDER·Filed 2006·Application pending·0 cites
- 4452US2009235673A1Detection of refrigerant release in co2 refrigerant systemsLIFSON ALEXANDER·Filed 2006·Application pending·0 cites
- 4551US2009151369A1Malfunction detection for fan or pump refrigerant systemLIFSON ALEXANDER·Filed 2006·Application pending·0 cites
- 4651US2010011788A1Off-season start-ups to improve reliability of refrigerant systemLIFSON ALEXANDER·Filed 2006·Application pending·0 cites
- 4751US2009165472A1System performance correction by modifying refrigerant composition in a refrigerant systemLIFSON ALEXANDER·Filed 2006·Application pending·0 cites
- 4850US2008250812A1Multi-Circuit Refrigerant System Utilizing Pulse Width Modulation TechniquesLIFSON ALEXANDER·Filed 2005·Application pending·0 cites
- 4950US2008229762A1Multi-Circuit Refrigerant System Using Distinct RefrigerantsLIFSON ALEXANDER·Filed 2005·Application pending·0 cites
- 5050US2008314063A1Combined Muffler and Oil Separator for Refrigerant SystemLIFSON ALEXANDER·Filed 2005·Application pending·0 cites
Showing the top 50 of 63 patent records by PatentIndex Score.
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