公开(公告)号：EP1240433A1

公开(公告)日：2002-09-18

申请号：EP00951529.7

申请日：2000-08-23

申请人： Leybold Vakuum GmbH

发明人： ARNDT, Lutz ,  DREIFERT, Thomas ,  HÖLZEMER, Michael ,  MEYER, Jürgen ,  SCHÖNBORN, Frank

IPC分类号： F04C29/10 ,  F04B25/00 ,  F04B37/14 ,  F04B37/20

CPC分类号： F04C28/28 ,  F04B25/005 ,  F04B37/14 ,  F04B37/20 ,  F04C18/16 ,  F04C2220/12 ,  F04C2220/50

摘要： The invention relates to a dry compressing vacuum pump (1) having a continuous or graduated inner compression and comprising a gas ballast device (8) having an isolating valve (11); the gas ballast device (8) also comprises a non-return valve (12), which prevents the escape of gases from the pump (1) through the gas ballast device (8) to the outside.

公开(公告)号：EP1274938A1

公开(公告)日：2003-01-15

申请号：EP01902322.5

申请日：2001-01-16

申请人： Leybold Vakuum GmbH

发明人： BEYER, Christian ,  BOY, Hermann ,  BAHNEN, Rudolf ,  SCHÖNBORN, Frank

IPC分类号： F04B35/04 ,  F04B35/06 ,  F04B41/06

CPC分类号： F04B35/045 ,  F04B35/06 ,  F04B41/06

摘要： The invention relates to an oscillating piston pump (1), in particular to an oscillating piston vacuum pump. The invention aims to create a range of pumps of this type comprising members which exhibit a different final pressure behaviour and/or a different vacuum capability. To achieve this, the range consists of several identically constructed modules (2) of an oscillating piston pump that are connected in parallel and/or in series, according to customer requirements and each module is equipped with an oscillating piston drive.