EP 0942172 B1 20040929 - Vacuum pump with multiple driven shafts
Title (en)
Vacuum pump with multiple driven shafts
Title (de)
Mehrwellenvakuumpumpe
Title (fr)
Pompe à vide à arbres d'entraînements multiples
Publication
Application
Priority
DE 19809957 A 19980307
Abstract (en)
[origin: US6241490B1] A multirotor vacuum pump including a housing, at least two rotors located in the housing and cooperating with each other so that as a result of a contactless movement of the at least two rotors relative to each other, working chambers, into which a to-be-pumped gas is fed, are formed, with at least one of the at least two rotors being hollow, and a drive formed as an external rotor motor having its rotor elements arranged on an inner surface of the at least two rotors, and stator elements fixedly mounted inside the at least one of the at least two rotors opposite the rotor elements.
IPC 1-7
IPC 8 full level
F04C 18/16 (2006.01); F04C 25/02 (2006.01); F04C 27/00 (2006.01); F04C 29/00 (2006.01); F04C 29/02 (2006.01); F04C 29/04 (2006.01)
CPC (source: EP US)
F04C 27/009 (2013.01 - EP US); F04C 29/0085 (2013.01 - EP US); F04C 29/023 (2013.01 - EP US); F04C 29/04 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
US 6241490 B1 20010605; AT E278110 T1 20041015; DE 19809957 A1 19990909; DE 59910616 D1 20041104; EP 0942172 A1 19990915; EP 0942172 B1 20040929; JP 4282809 B2 20090624; JP H11294358 A 19991026
DOCDB simple family (application)
US 26214199 A 19990303; AT 99101291 T 19990125; DE 19809957 A 19980307; DE 59910616 T 19990125; EP 99101291 A 19990125; JP 3269599 A 19990210