Assignee
FRICK CO
US29 patents
Top patents by PatentIndex Score
US4548549AOct 22, 1985
Micro-processor control of compression ratio at full load in a helical screw rotary compressor responsive to compressor drive motor current
FRICK CO75 citations93
US4690759ASep 1, 1987
Centrifugal and impingement oil separator
FRICK CO58 citations92
US4465446AAug 14, 1984
Radial and thrust bearing mountings providing independent loading
FRICK CO34 citations92
US4378680AApr 5, 1983
Shell and tube ice-maker with hot gas defrost
FRICK CO31 citations92
US5134856AAug 4, 1992
Oil pressure maintenance for screw compressor
FRICK CO26 citations91
US4678406AJul 7, 1987
Variable volume ratio screw compressor with step control
FRICK CO39 citations91
US4609329ASep 2, 1986
Micro-processor control of a movable slide stop and a movable slide valve in a helical screw rotary compressor with an enconomizer inlet port
FRICK CO108 citations90
US4519748AMay 28, 1985
Micro-processor control of compression ratio at full load in a helical screw rotary compressor responsive to compressor drive motor current
FRICK CO43 citations90
US4516914AMay 14, 1985
Micro-processor control of moveable slide stop and a moveable slide valve in a helical screw rotary compressor
FRICK CO51 citations90
US4336001AJun 22, 1982
Solid state compressor control system
FRICK CO107 citations90
US4227862AOct 14, 1980
Solid state compressor control system
FRICK CO145 citations90
US4434112AFeb 28, 1984
Heat transfer surface with increased liquid to air evaporative heat exchange
FRICK CO76 citations89
US4515540AMay 7, 1985
Variable liquid refrigerant injection port locator for screw compressor equipped with automatic variable volume ratio
FRICK CO26 citations81
US3986801AOct 19, 1976
Screw compressor
FRICK CO23 citations81
US3994638ANov 30, 1976
Oscillating rotary compressor
FRICK CO30 citations78
US4840033AJun 20, 1989
Ice builder and control system therefor
FRICK CO16 citations73
US4457681AJul 3, 1984
Volume ratio control means for axial flow helical screw type compressor
FRICK CO15 citations73
US4404810ASep 20, 1983
Method of making ice using hot gas defrost
FRICK CO7 citations73
US4324109AApr 13, 1982
Ice-making apparatus with hot gas defrost
FRICK CO19 citations73
US4553911ANov 19, 1985
Method of coding the oil in screw compressors equipped with automatic variable volume ratio
FRICK CO7 citations72
US4068981AJan 17, 1978
Blade-type rotary compressor with full unloading and oil sealed interfaces
FRICK CO11 citations70
US4437813AMar 20, 1984
Gas receiving and transmitting system
FRICK CO22 citations69
US4685310AAug 11, 1987
Multi-purpose valve assembly
FRICK CO9 citations67
US4402189ASep 6, 1983
Refrigeration system condenser heat recovery at higher temperature than normal condensing temperature
FRICK CO7 citations65
US4325226AApr 20, 1982
Refrigeration system condenser heat recovery at higher temperature than normal condensing temperature
FRICK CO9 citations65
US4227380AOct 14, 1980
Single casing, multiple duty valve
FRICK CO12 citations65
US4646526AMar 3, 1987
Method and apparatus for making fragmentary ice
FRICK CO3 citations62
US4100757AJul 18, 1978
Closed circuit ammonia system for liquid heating from water
FRICK CO3 citations62
US4027496AJun 7, 1977
Dual liquid delivery and separation apparatus and process
FRICK CO6 citations62