Invention Grant
- Patent Title: Dry vacuum pump with pressurized bearing and seal
-
Application No.: US15771776Application Date: 2016-10-31
-
Publication No.: US10851783B2Publication Date: 2020-12-01
- Inventor: Peter Birch , Robert Jenkins , Clive Tunna
- Applicant: Leybold GmbH
- Applicant Address: DE Cologne
- Assignee: LEYBOLD GMBH
- Current Assignee: LEYBOLD GMBH
- Current Assignee Address: DE Cologne
- Agency: Ohlandt, Greeley, Ruggiero and Perle, LLP
- Priority: DE202015007606U 20151103
- International Application: PCT/EP2016/076223 WO 20161031
- International Announcement: WO2017/076803 WO 20170511
- Main IPC: F04C27/00
- IPC: F04C27/00 ; F04C25/02

Abstract:
A dry vacuum pump, comprising a pump housing, which forms a plurality of suction chambers, wherein rotor elements are arranged in the suction chambers, in order to convey a pump medium from a high-vacuum-side inlet to an outlet. At least one rotor element is arranged in each suction chamber. The rotor elements are connected to a rotor shaft. The rotor shaft is supported by bearings, wherein a high-vacuum-side bearing is arranged in a cut-out. A sealing device is arranged between the high-vacuum-side bearing and at least one suction chamber adjacent to the high-vacuum-side bearing. The cut-out is connected, by means of a first channel, to a region of the dry vacuum pump in which there is a higher pressure than in at least one suction chamber adjacent to the high-vacuum-side bearing.
Public/Granted literature
- US20180340535A1 DRY VACUUM PUMP Public/Granted day:2018-11-29
Information query