Vacuum pumping arrangement

Details Vacuum pumping arrangement Vacuum pumping arrangement

2004-12-08

2009-11-10

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

Smooth runner surface for working fluid frictional contact

C415S121200

Reexamination Certificate

active

07614844

ABSTRACT:
A regenerative pumping mechanism comprises a rotor having a series of blades positioned in an annular array on one side of the rotor, and a stator having an annular channel within which the blades rotate. In order to control the axial clearance between the rotor and the stator, an axial magnetic bearing actively controls relative axial movement between the rotor and the stator. This can allow the pumping mechanism to provide controllable axial sealing between the rotor and the stator, as opposed to radial sealing.

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United Kingdom Search Report of Application No. GB 0329034.3; Date of search: May 11, 2004.
PCT Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, Or the Declaration of International Application No. PCT/GB2004/005211; Date of mailing: Mar. 15, 2005.
PCT International Search Report of International Application No. PCT/ GB2004/005211; Date of mailing of International Search Report: Mar. 15, 2005.
PCT Written Opinion of the International Searching Authority of International Application No. PCT/GB2004/005211; Date of mailing: Mar. 15, 2005.

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