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1. (WO2017021695) VACUUM PUMP WITH LONGITUDINAL AND ANNULAR SEALING MEMBERS

Pub. No.:    WO/2017/021695    International Application No.:    PCT/GB2016/052290
Publication Date: Fri Feb 10 00:59:59 CET 2017 International Filing Date: Thu Jul 28 01:59:59 CEST 2016
IPC: F01C 19/00
F01C 21/10
F04C 25/02
F04C 27/00
Applicants: EDWARDS LIMITED
Inventors: KIM, Jaeho
KAILASAM, Sivabalan
Title: VACUUM PUMP WITH LONGITUDINAL AND ANNULAR SEALING MEMBERS
Abstract:
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.