Assignee
LIFSON ALEXANDER
US28 patents
Top patents by PatentIndex Score
US8079229B2Dec 20, 2011
Economized refrigerant vapor compression system for water heating
LIFSON ALEXANDER43 citations94
US8528359B2Sep 10, 2013
Economized refrigeration cycle with expander
LIFSON ALEXANDER27 citations93
US8136364B2Mar 20, 2012
Refrigerant system with expansion device bypass
LIFSON ALEXANDER28 citations93
US8079228B2Dec 20, 2011
Refrigerant system with multi-speed scroll compressor and economizer circuit
LIFSON ALEXANDER24 citations93
US9200811B2Dec 1, 2015
System and method for control of heat system operation by changing a switching set point of operation
LIFSON ALEXANDER8 citations84
US9890982B2Feb 13, 2018
Discrete frequency operation for unit capacity control
LIFSON ALEXANDER3 citations73
US8904813B2Dec 9, 2014
Pulse width modulated system with pressure regulating valve
LIFSON ALEXANDER4 citations73
US8316657B2Nov 27, 2012
Refrigerant system and control method
LIFSON ALEXANDER6 citations73
US8424328B2Apr 23, 2013
Suction valve pulse width modulation control based on evaporator or condenser pressure
LIFSON ALEXANDER3 citations63
US8276395B2Oct 2, 2012
Pulse width modulation with reduced suction pressure to improve efficiency
LIFSON ALEXANDER5 citations63
US8240161B2Aug 14, 2012
Suction valve pulse width modulation control based on compressor temperature
LIFSON ALEXANDER3 citations63
US8069683B2Dec 6, 2011
Refrigerant system unloading by-pass into evaporator inlet
LIFSON ALEXANDER4 citations63
US8292599B2Oct 23, 2012
Compressor reverse rotation of variable duration on start-up
LIFSON ALEXANDER2 citations62
US8109102B2Feb 7, 2012
Adjustment of compressor operating limits
LIFSON ALEXANDER2 citations61
US9464835B2Oct 11, 2016
Remote software loading for refrigerant system
LIFSON ALEXANDER0 citations52
US8956135B2Feb 17, 2015
Screw compressor with asymmetric ports
LIFSON ALEXANDER1 citations52
US8726679B2May 20, 2014
Dedicated pulsing valve for compressor cylinder
LIFSON ALEXANDER0 citations52
US8661846B2Mar 4, 2014
Restriction in vapor injection line
LIFSON ALEXANDER1 citations52
US8337176B2Dec 25, 2012
Tandem compressors with common intermediate port
LIFSON ALEXANDER0 citations52
USRE42966ENov 29, 2011
Tandem compressors with discharge valve on connecting lines
LIFSON ALEXANDER1 citations52
US9995516B2Jun 12, 2018
Superheat control for HVACandR systems
LIFSON ALEXANDER0 citations51
US9677788B2Jun 13, 2017
Refrigerant system with multiple load modes
LIFSON ALEXANDER1 citations51
US9494352B2Nov 15, 2016
Refrigerant system with control to address flooded compressor operation
LIFSON ALEXANDER1 citations50
US10337507B2Jul 2, 2019
Bypass unloader valve for compressor capacity control
LIFSON ALEXANDER0 citations42
US10006681B2Jun 26, 2018
Pulse width modulation with discharge to suction bypass
LIFSON ALEXANDER0 citations42
US9139066B2Sep 22, 2015
Combined operation and control of suction modulation and pulse width modulation valves
LIFSON ALEXANDER0 citations42
US8925336B2Jan 6, 2015
Refrigerant system performance enhancement by subcooling at intermediate temperatures
LIFSON ALEXANDER0 citations42
US8584487B2Nov 19, 2013
Refrigerant system with expander speed control
LIFSON ALEXANDER0 citations42