EP 0856108 A1 19980805 - FRICTION VACUUM PUMP WITH INTERMEDIATE INLET
Title (en)
FRICTION VACUUM PUMP WITH INTERMEDIATE INLET
Title (de)
REIBUNGSVAKUUMPUMPE MIT ZWISCHENEINLASS
Title (fr)
POMPE A VIDE A FRICTION A ADMISSION INTERMEDIAIRE
Publication
Application
Priority
- DE 29516599 U 19951020
- EP 9603524 W 19960809
Abstract (en)
[origin: WO9715760A1] The invention concerns a friction vacuum pump (1) with an inlet (11), an outlet (20) and a rotor (6, 7) and stator (14, 21) which are located between the inlet (11) and the outlet (20) and carry blades (7 and 8), respectively. In order to design an intermediate inlet (28), which passes into an annular channel (31) surrounding the stator and rotor blades (7 and 8), respectively, so that it is simple and effective, the invention proposes that the stator (21) consists of annular blades or blade segments (25) and annular spacers (22, 23, 24), the outer edges of the annular blades or blade segments (25) being located between the spacers (22, 23, 24) and at least one spacer (23, 24) located at the height of the annular channel (31) having perforations (32) in it.
IPC 1-7
IPC 8 full level
F04D 19/04 (2006.01)
CPC (source: EP US)
F04D 19/04 (2013.01 - EP US)
Citation (search report)
See references of WO 9715760A1
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
DE 29516599 U1 19951207; DE 59609415 D1 20020808; EP 0856108 A1 19980805; EP 0856108 B1 20020703; JP 3939352 B2 20070704; JP H11513775 A 19991124; US 6030189 A 20000229; WO 9715760 A1 19970501
DOCDB simple family (application)
DE 29516599 U 19951020; DE 59609415 T 19960809; EP 9603524 W 19960809; EP 96928437 A 19960809; JP 51621997 A 19960809; US 5189398 A 19980417