Login| Sign Up| Help| Contact|

Patent Searching and Data


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)
Application Number:
PCT/EP2014/050459
Publication Date:
December 31, 2014
Filing Date:
January 13, 2014
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
OERLIKON LEYBOLD VACUUM GMBH (DE)
International Classes:
F04C18/12; F04C28/26; F04C29/12
Domestic Patent References:
WO2009074408A22009-06-18
Foreign References:
US4763636A1988-08-16
US2311936A1943-02-23
DE102008034073A12010-01-28
US4744734A1988-05-17
US5127386A1992-07-07
Attorney, Agent or Firm:
VON KREISLER SELTING WERNER (Bahnhofsvorplatz 1, Köln, DE)
Download PDF: