EP 0409287 B1 19940406 - Vacuum pump with displacement space.
Title (en)
Vacuum pump with displacement space.
Title (de)
Vakuumpumpe mit Schöpfraum.
Title (fr)
Pompe à vide avec espace de déplacement.
Publication
Application
Priority
- EP 90116358 A 19870515
- EP 87107089 A 19870515
Abstract (en)
[origin: EP0409287A1] The invention relates to a twin shaft vacuum pump with at least one expansion chamber, with a pair or rotors located in the or in each expansion chamber, with plates defining the expansion chamber or chambers and with a synchronisation mechanism consisting of two gear wheels located in a side chamber, the one end of one of the shafts being connected to a drive motor; in order to obtain an effective separation of the bearing chambers of the upper bearings from the expansion chambers in the case of vertically arranged vacuum pump shafts (2, 3) and synchronisation mechanism arranged below the shafts, it is proposed that the upper ends of the shafts (2, 3) be of pot-shaped design and that the shaft bearings (27) be supported on the inner walls of the pot-shaped configurations (63) and on a frustum (65) fixed to the housing and projecting into these. <IMAGE>
IPC 1-7
IPC 8 full level
F04C 23/02 (2006.01); F04C 23/00 (2006.01); F04C 25/02 (2006.01); F04C 29/00 (2006.01); F04C 29/04 (2006.01)
CPC (source: EP US)
F01C 21/02 (2013.01 - EP US); F04C 18/123 (2013.01 - EP US); F04C 23/00 (2013.01 - EP US); F04C 23/001 (2013.01 - EP US); F04C 27/009 (2013.01 - EP US); F04C 29/005 (2013.01 - EP US); F04C 2240/52 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0409287 A1 19910123; EP 0409287 B1 19940406; DE 3785192 D1 19930506; EP 0290662 A1 19881117; EP 0290662 B1 19930331; JP H10192 U 19980825; JP S63302194 A 19881209; US 4940398 A 19900710
DOCDB simple family (application)
EP 90116358 A 19870515; DE 3785192 T 19870515; EP 87107089 A 19870515; JP 11501488 A 19880513; JP 794797 U 19970805; US 19365988 A 19880513