Rotary-type vacuum pump

Details Rotary-type vacuum pump Rotary-type vacuum pump

1992-10-27

1993-08-17

Gluck, Richard E.

Pumps

With condition responsive pumped fluid control

Lubricant condition responsive

417295, F04B 4900

Patent

active

052363139

ABSTRACT:
An improved rotary-type vacuum pump includes a lubrication circuit in which an oil inlet port of an oil suction duct is directed towards the floor of the pump casing, rotors having oil spaces filled with oil between the vanes, an oil filter provided at the outside of the pump housing, and an excess pressure discharge valve immersed in the oil and being disposed at a terminating portion of the lubrication circuit. The mounting of other essential elements of the pump unit is concentrated on the front cover and the pump housing of the pump.

REFERENCES:
patent: 4525129 (1985-06-01), Berges et al.
patent: 4844702 (1989-07-01), Ceccherini
patent: 5020976 (1991-06-01), Nakajima et al.

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