EP 0767307 B1 20021218 - Secondary pumping group
Title (en)
Secondary pumping group
Title (de)
Sekundär-Pumpenaggregat
Title (fr)
Groupe de pompage secondaire
Publication
Application
Priority
FR 9511660 A 19951004
Abstract (en)
[origin: EP0767307A1] The assembly, associated with a secondary mechanical pump (1), has a cryogenic trap (2) in the form of a ring surrounding the suction side of the pump. The trap is enclosed in a housing (4) forming the pump's suction port. It has a U-shaped cross-section with its open side towards the pump's suction side. The trap is cooled by a pulsed-tube cryogenerator (9) which surrounds the pump beneath the trap and is fed by a compressor (11) through an impedance (12) and an exchanger-regenerator (14). The impedance is in the form of a rotary valve (12) driven by a motor (13), with the exchanger-regenerator, the valve and the motor aligned parallel with the axis of the pump and beneath the cold end of the pulsed tube. The assembly is connected to a chamber in which an industrial process takes place, and a neutral gas is injected into the pump and its flow is regulated according to the pressure in the chamber.
IPC 1-7
IPC 8 full level
F04B 37/06 (2006.01); F04B 37/08 (2006.01); F04B 41/06 (2006.01); F04D 19/04 (2006.01); F16T 1/36 (2006.01)
CPC (source: EP US)
F04B 37/06 (2013.01 - EP US); F04B 41/06 (2013.01 - EP US); F04D 19/046 (2013.01 - EP US); Y10S 417/901 (2013.01 - EP)
Designated contracting state (EPC)
CH DE GB IT LI
DOCDB simple family (publication)
EP 0767307 A1 19970409; EP 0767307 B1 20021218; DE 69625436 D1 20030130; DE 69625436 T2 20031009; FR 2739574 A1 19970411; FR 2739574 B1 19971114; JP 2763524 B2 19980611; JP H09126126 A 19970513; US 5720174 A 19980224
DOCDB simple family (application)
EP 96402094 A 19961001; DE 69625436 T 19961001; FR 9511660 A 19951004; JP 26471296 A 19961004; US 72486596 A 19961003