Inventor
SPELLAR PETER C
US4 patents
Patents
4 patentsUS4548549AOct 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
US4678406AJul 7, 1987
Variable volume ratio screw compressor with step control
FRICK CO39 citations91
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