Alcatel

Emmanuel Bourgeois

Pascal Durand

The invention concerns a vacuum pump consisting in the assembly of two stator half-shells ( ) and two directly mounted end parts ( ) with an interposed single-piece continuous pressure seal ( ). The pressure seal ( ) comprises two annular end parts ( ) generally parallel to each other and connected by two side-members ( ) which are generally perpendicular thereto. Thus, the number of components to be assembled to produce an multistage dry vacuum pump is reduced, while providing satisfactory impermeability to outside atmosphere.

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Metz Tessy, France

Emmanuel Bourgeois