EP 1021654 A1 20000726 - SCREW VACUUM PUMP PROVIDED WITH ROTORS
Title (en)
SCREW VACUUM PUMP PROVIDED WITH ROTORS
Title (de)
SCHRAUBENVAKUUMPUMPE MIT ROTOREN
Title (fr)
POMPE A VIDE A VIS POURVUE DE ROTORS
Publication
Application
Priority
- DE 19745615 A 19971010
- EP 9803757 W 19980619
Abstract (en)
[origin: DE19745615A1] Each of the rotors (5) has at least two sections (17,18) with different rotor profiles (19,20). The suction side section has a greater diameter than the pressure-side section. The suction-side section is produced with a greater tolerance than the pressure-side section. Rotor cooling apparatus is situated in a bearing-side open cavity (31) in the rotor.
IPC 1-7
IPC 8 full level
F04C 18/08 (2006.01); F04C 18/16 (2006.01); F04C 23/00 (2006.01); F04C 25/02 (2006.01); F04C 28/26 (2006.01); F04C 29/00 (2006.01); F04C 29/04 (2006.01)
CPC (source: EP KR US)
F04C 18/084 (2013.01 - EP US); F04C 18/16 (2013.01 - KR); F04C 23/001 (2013.01 - EP US); F04C 23/008 (2013.01 - EP US); F04C 28/26 (2013.01 - EP US); F04C 29/04 (2013.01 - EP US); F04C 18/16 (2013.01 - EP US); F04C 2220/10 (2013.01 - EP US)
Citation (search report)
See references of WO 9919631A1
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
DE 19745615 A1 19990415; DE 59812093 D1 20041111; EP 1021654 A1 20000726; EP 1021654 B1 20041006; JP 2001520353 A 20011030; JP 4146081 B2 20080903; KR 20010030995 A 20010416; TW 452631 B 20010901; US 6382930 B1 20020507; WO 9919631 A1 19990422
DOCDB simple family (application)
DE 19745615 A 19971010; DE 59812093 T 19980619; EP 9803757 W 19980619; EP 98937515 A 19980619; JP 2000516156 A 19980619; KR 20007003781 A 20000407; TW 87115990 A 19980925; US 52943300 A 20000410