TWO-ROTOR VACUUM PUMP Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: pair of profiled rotors is located in housing provided with end plates and working medium supply and discharge ports. Pair of rotors is mounted on two parallel shafts. Rotors are synchronized relative to each other and provision is made for their rotation in opposite directions. Disk with through slot is secured on one of shafts for periodically bringing the delivery chamber in communication with working medium discharge port by means of slot. EFFECT: enhanced reliability. 2 dwg