Global Patent Index - EP 0985828 A1

EP 0985828 A1 2000-03-15 - Method and device to prevent deposits in a turbomolecular pump having magnetic or gas bearings

Title (en)

Method and device to prevent deposits in a turbomolecular pump having magnetic or gas bearings

Title (de)

Verfahren und Anlage zur Verhinderung von Ablagerungen in eineTurbomolekularpumpe mit Magnet-oder Gaslager

Title (fr)

Procédé et dispositif pour éviter les dépôts dans une pompe turbomoléculaire à palier magnétique ou gazeux

Publication

EP 0985828 A1 (FR)

Application

EP 99402125 A

Priority

FR 9811296 A

Abstract (en)

The deposition perturbation removal method is applied to a turbo-molecular pump having several stages (6,7,16-18;8-10,19) with magnetic paddles (13,14). The deposition perturbation is removed by injecting an active gas to a specific area which stirs up the generator molecules removing perturbations.

Abstract (fr)

Selon l'invention, on évite les dépôts perturbateurs des décharges électriques entre le rotor (2) et le stator (1) à l'intérieur d'une pompe turbomoléculaire à plusieurs étages sur paliers magnétiques ou gazeux (13, 14) en injectant, en au moins un emplacement approprié (21) à l'intérieur de la pompe, par au moins une canalisation d'entrée de gaz (20), un gaz actif qui réagit avec les molécules génératrices des dépôts et forme des composés gazeux évacués par la pompe. On évite ainsi les dépôts sans perturber la conductance de la pompe ni altérer l'atmosphère présente dans l'enceinte à laquelle est raccordée la pompe. <IMAGE>

IPC 1-7 (main, further and additional classification)

F04D 19/04; F04D 29/70

IPC 8 full level (invention and additional information)

F04D 19/04 (2006.01); F04D 29/70 (2006.01)

CPC (invention and additional information)

F04D 29/70 (2013.01); F04D 19/04 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0985828 A1 20000315; EP 0985828 B1 20050907; AT 304123 T 20050915; DE 69927101 D1 20051013; DE 69927101 T2 20060629; FR 2783883 A1 20000331; FR 2783883 B1 20001110; US 6224326 B1 20010501

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