EP 1797331 A1 20070620 - DRAG VACUUM PUMP
Title (en)
DRAG VACUUM PUMP
Title (de)
REIBUNGSVAKUUMPUMPE
Title (fr)
POMPE A VIDE A FRICTION
Publication
Application
Priority
- EP 2005054735 W 20050921
- DE 102004047930 A 20041001
Abstract (en)
[origin: US2008206041A1] A friction vacuum pump ( 10 ) comprises a housing ( 12 ) defining a vaneless pump stator ( 30 ), a rotor drive and a rotor support which rotatably supports a pump rotor ( 16 ) provided with a vane ( 18 ). The housing ( 12 ) surrounds the overall axial length of the pump rotor ( 16 ), the rotor drive and the rotor support. Prior art housings are of multipart configuration and thus comprise seals between the housing portions. The seals are difficult to coat and may be or become locations where leaks occur. In contrast, the housing ( 12 ) is of one-piece configuration such that, in any case, the region of the housing ( 12 ) which is in contact with the vacuum gas is free of seals.
IPC 8 full level
F04D 19/04 (2006.01); F04D 29/40 (2006.01); F04D 29/52 (2006.01)
CPC (source: EP US)
F04D 19/044 (2013.01 - EP US); F04D 29/644 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
US 2008206041 A1 20080828; AT E454555 T1 20100115; CN 100458171 C 20090204; CN 101031724 A 20070905; DE 102004047930 A1 20060406; DE 502005008839 D1 20100225; EP 1797331 A1 20070620; EP 1797331 B1 20100106; JP 2008514862 A 20080508; WO 2006037730 A1 20060413
DOCDB simple family (application)
US 66414205 A 20050921; AT 05791919 T 20050921; CN 200580032950 A 20050921; DE 102004047930 A 20041001; DE 502005008839 T 20050921; EP 05791919 A 20050921; EP 2005054735 W 20050921; JP 2007534008 A 20050921