EP 0173787 B1 19890517 - VACUUM PUMP
Title (en)
VACUUM PUMP
Publication
Application
Priority
- DE 3404556 A 19840209
- DE 3425177 A 19840709
- DE 3435921 A 19840929
Abstract (en)
[origin: US4612957A] A vacuum pump and trap combination in which the trap is configured in the manner of a siphon and comprises a tube immersed in trap liquid but having an opening lying above the trap liquid level. The tube has a wall section lying below the trap liquid level and having perforations therein to admit different amounts of trap liquid in relation to the rate of discharge gas flow, thereby preventing frothing of the trap liquid.
IPC 1-7
IPC 8 full level
F04B 37/00 (2006.01); F04B 37/14 (2006.01); F04B 39/12 (2006.01); F04B 39/16 (2006.01); F04C 27/02 (2006.01)
CPC (source: EP US)
F04B 37/14 (2013.01 - EP US); F04B 39/16 (2013.01 - EP US); Y10T 137/4576 (2015.04 - EP US); Y10T 137/4606 (2015.04 - EP US); Y10T 137/4643 (2015.04 - EP US); Y10T 137/86083 (2015.04 - EP US)
Designated contracting state (EPC)
BE CH DE FR GB LI NL
DOCDB simple family (publication)
EP 0173787 A2 19860312; EP 0173787 A3 19861008; EP 0173787 B1 19890517; DE 3570266 D1 19890622; US 4612957 A 19860923
DOCDB simple family (application)
EP 85100240 A 19850111; DE 3570266 T 19850111; US 69590985 A 19850129