Title:
VACUUM PUMP, IN PARTICULAR ROTARY-LOBE PUMP
Document Type and Number:
WIPO Patent Application WO/2014/117991
Kind Code:
A3
Abstract:
A vacuum pump such as a rotary-lobe pump has a pump chamber (10) in which pump elements (12) are arranged. A pressure side (30) is connected to a suction side (20) of the pump chamber (10) via a connecting duct (22). Furthermore, a valve device (24) is arranged in a passage opening (32) of the connecting duct (22). To vary the effective cross-sectional area of the passage opening (32), the valve device (24) is, in one of the preferred embodiments, assigned an adjustable aperture device (42).
Inventors:
STRATMANN DIRK (DE)
BERTSCH ARMIN (DE)
GIEBMANNS WOLFGANG (DE)
BERTSCH ARMIN (DE)
GIEBMANNS WOLFGANG (DE)
Application Number:
PCT/EP2014/050459
Publication Date:
December 31, 2014
Filing Date:
January 13, 2014
Export Citation:
Assignee:
OERLIKON LEYBOLD VACUUM GMBH (DE)
International Classes:
F04C18/12; F04C28/26; F04C29/12
Domestic Patent References:
WO2009074408A2 | 2009-06-18 |
Foreign References:
US4763636A | 1988-08-16 | |||
US2311936A | 1943-02-23 | |||
DE102008034073A1 | 2010-01-28 | |||
US4744734A | 1988-05-17 | |||
US5127386A | 1992-07-07 |
Attorney, Agent or Firm:
VON KREISLER SELTING WERNER (Bahnhofsvorplatz 1, Köln, DE)
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