摘要:
A TWO-STAGED ROOTS TYPE COMPRESSOR HAVING A HOUSING SEPARATED INTO TWO COMPARTMENTS BY A PARTITION, EACH COMPARTMENT CONTAINING A WORKING CHAMBER HAVING ROTARY MATING IMPELLERS THEREIN, INLETS TO EACH MEMBER AND OUTLETS FROM EACH CHAMBER, PASSAGES IN THE PARTITION COMMUNICATING THE OUTLET OF ONE ANOTHER WITH THE INLET OF THE OTHER CHAMBER, VALVED PASSAGE IN THE PARTITION COMMUNICATING THE INLETS OF EACH CHAMBER, THE IMPELLERS OF EACH CHAMBER BEING MOUNTED ON COMMON SHAFTS.