Vacuum pump having an evacuated gear chamber

Details Vacuum pump having an evacuated gear chamber Vacuum pump having an evacuated gear chamber

1984-12-12

1986-12-30

Vrablik, John J.

Rotary expansible chamber devices

Heat exchange or non-working fluid lubricating or sealing

Vent or non-seal means prevents working and non-working...

418 96, 418104, 418206, 55185, 55195, 277 3, 277 15, 277 17, 277 24, F04C 1818, F04C 2902, B01D 4600, F16J 15447

Patent

active

046326502

ABSTRACT:
A vacuum pump includes an evacuation chamber, a gear chamber, a partition separating the evacuation chamber from the gear chamber, a rotary pump shaft extending through the partition and having one end connected to a vane arranged for rotation in the evacuation chamber and having another, opposite end extending into the gear chamber, a shaft bearing surrounding the pump shaft and received in the partition, a labyrinth seal surrounding the pump shaft and received in the partition for sealing the evacuation chamber from the gear chamber, an oil sump defined in the gear chamber for accommodating oil therein, an evacuation device for generating a vacuum in the gear chamber and an oil loss preventing arrangement for avoiding an oil deficiency in the gear chamber due to the vacuum generated therein.

REFERENCES:
patent: 1696882 (1928-12-01), Hassler
patent: 2064703 (1936-12-01), Van de Graaff
patent: 3071384 (1963-01-01), Friberg
patent: 3131939 (1964-05-01), Cuny
patent: 3360192 (1967-12-01), Van Hees
patent: 3489034 (1970-01-01), Moore
patent: 4084944 (1978-04-01), Chirico

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