Inventor
MURPHY DAVID A
CA7 patents
⚠️ This page may combine multiple inventors who share the name “MURPHY DAVID A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FRICK CO
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