EP 0426078 B1 19930728 - METHOD OF OPERATING A VOLUMETRIC PUMP
Title (en)
METHOD OF OPERATING A VOLUMETRIC PUMP
Publication
Application
Priority
FR 8914354 A 19891102
Abstract (en)
[origin: EP0426078A1] The object of the invention is a volumetric pump comprising a rotor turning in a stator with a given clearance, used for the pumping of a gas or a gas mixture of given molecular mass, characterised in that it comprises means for injecting into the said clearance a gas of higher molecular mass than that of the pumped gas or gas mixture. Applications to vane pumps, Roots pumps, double cylindrical or conical screw pumps, etc. <IMAGE>
IPC 1-7
IPC 8 full level
F04C 18/08 (2006.01); F04C 23/00 (2006.01); F04C 25/02 (2006.01); F04C 27/00 (2006.01); F04C 27/02 (2006.01); F04C 29/00 (2006.01)
CPC (source: EP)
F04C 27/00 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0426078 A1 19910508; EP 0426078 B1 19930728; AT E92159 T1 19930815; DE 69002439 D1 19930902; DE 69002439 T2 19931118; ES 2042175 T3 19931201; FR 2653831 A1 19910503; JP H03160185 A 19910710; JP H0730744 B2 19950410; RU 1831588 C 19930730
DOCDB simple family (application)
EP 90120721 A 19901029; AT 90120721 T 19901029; DE 69002439 T 19901029; ES 90120721 T 19901029; FR 8914354 A 19891102; JP 29058490 A 19901026; SU 4831590 A 19901101