VACUUM PUMP WITH LONGITUDINAL AND ANNULAR SEALING MEMBERS

摘要

The present invention relates to a multi-stage vacuum pump comprising: first and second half-shell stator components (102). (104) defining a plurality of pumping chambers (106) to (116) and for assembly together along respective longitudinally extending faces (118, 120); first and second end stator components (122), (124) for assembly at respective longitudinal end faces (126), (128) of the first and second half-shell stator components; longitudinal seals (12) for sealing between the first and second half- shell stator components when assembled together at the longitudinally extending faces; and annular seals (146) for sealing between the first and second end stator components and the first and second half- shell stator components when assembled; the annular sealing members and the longitudinal sealing members form a planar sealing interface therebetween.