Vacuum pumping arrangement

Details Vacuum pumping arrangement Vacuum pumping arrangement

2007-04-03

2007-04-03

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

Turbine regenerative pump

C415S055100, C415S055400

Reexamination Certificate

active

10991189

ABSTRACT:
In a pumping arrangement for a chamber, a regenerative pumping mechanism comprises a rotor and a stator having an annular channel within which rotor blades rotate to urge fluid along the channel. The channel has a stripper, a channel inlet positioned adjacent one end of the stripper and through which fluid from the chamber enters the channel, and a channel outlet positioned adjacent the other end of the stripper and through which pressurised fluid leaves the channel. The stator further comprises a fluid bypass in the form of a bore having an inlet and an outlet on either side of the stripper. A valve allows fluid entering the channel to selectively diverted through the bore to the channel outlet. This can allow the performance of the pump to be varied without changing the speed of rotation of the rotor, and thus allow the pressure in the chamber to be accurately controlled.

REFERENCES:
patent: 0 636 791 (1995-02-01), None
patent: 0 636 792 (1995-02-01), None
patent: 1 363 027 (2003-11-01), None
patent: 2220706 (1990-01-01), None
United Kingdom Search Report of Application No. GB 0327149.1; Date of search: Apr. 20, 2004.

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