The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2003
Filed:
Apr. 18, 2002
Applicant:
Inventors:
Pascal Durand, La Balme de Sillingy, FR;
Emmanuel Bourgeois, Metz Tessy, FR;
Assignee:
Alcatel, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F03C 2/00 ;
U.S. Cl.
CPC ...
F03C 2/00 ;
Abstract
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.