EP 1626178 B1 20071010 - Scroll vacuum pump
Title (en)
Scroll vacuum pump
Title (de)
Spiralvakuumpumpe
Title (fr)
Pompe à vide à spirales
Publication
Application
Priority
EP 04018870 A 20040809
Abstract (en)
[origin: EP1626178A1] A scroll vacuum pump has an orbiting scroll (5) and fixed scrolls (3c,4c). The orbiting scroll (5) is rotatably mounted to an eccentric portion (8a) of a driving shaft (8) and revolved by the driving shaft, so that a gas is sucked into a compression chamber (2) between the orbiting scroll and fixed scrolls through a sucking bore (1a). External air is introduced through a ventilating hole (21) axially formed in the driving shaft (8) and into the compression chamber (2) via a check valve (25) that opens by centrifugal force when the driving shaft rotates, thereby cooling the eccentric portion (8a) and bearings to increase durability thereof. When the driving shaft (8) stops, the check valve (25) closes, so that a toxic gas in the compression chamber is not leaked to the outside to prevent environmental pollution.
IPC 8 full level
F04C 18/02 (2006.01); F04C 29/04 (2006.01)
CPC (source: EP)
F04C 29/04 (2013.01); F04C 2220/50 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1626178 A1 20060215; EP 1626178 B1 20071010; DE 602004009437 D1 20071122; DE 602004009437 T2 20080724
DOCDB simple family (application)
EP 04018870 A 20040809; DE 602004009437 T 20040809