Multistage vacuum pump with interstage inlet

Details Multistage vacuum pump with interstage inlet Multistage vacuum pump with interstage inlet

1998-11-24

2000-08-22

Look, Edward K.

Rotary kinetic fluid motors or pumps

Smooth runner surface for working fluid frictional contact

415116, 415143, 417250, 4174234, 4174239, F04D 1904

Patent

active

061062235

ABSTRACT:
A vacuum pump comprising a plurality of vacuum stages and having a first pump inlet through which gas can pass through all the pump stages and a second inlet through which gas can enter the pump at an interstage location and pass only through subsequent stages of the pump, wherein the pump stages prior to the interstage are sized differently to these stages subsequent to the interstages such that the pump overall suits the pressure requirements and pumping capacity of the different systems attached to the first and second inlet, respectively.

REFERENCES:
patent: 5445502 (1995-08-01), Itou et al.
patent: 5501583 (1996-03-01), Nagaoka et al.
patent: 5707213 (1998-01-01), Conrad

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