EP 1421282 B1 20071107 - FLUID DISPLACEMENT PUMP WITH BACKPRESSURE STOP
Title (en)
FLUID DISPLACEMENT PUMP WITH BACKPRESSURE STOP
Title (de)
VERDRÄNGERPUMPE MIT GEGENDRUCKVERHINDERUNG
Title (fr)
POMPE VOLUMETRIQUE A BUTEE DE CONTREPRESSION
Publication
Application
Priority
- NL 1018833 A 20010827
- NL 1019337 A 20011109
- NL 1019406 A 20011120
- US 0209986 W 20020328
- US 3603601 A 20011231
Abstract (en)
[origin: WO03019009A1] The fluid displacement pump enables substantially continuous pumping from a low-pressure side to a high-pressure side substantially without any backflow or backpressure pulsations. Liquid or gas is injected to the high-pressure side by way of mutually intertwined worm spindles that form a fluidtight displacement system. The blades (9A, 9B) of the impeller system are slightly curved from the inside out, i.e., from their axles (31) to their periphery, so as to ensure a tight seal between adjacent blades. The orientation of the blades is almost flat, i.e., their attack angle relative to backpressure is close to perpendicular so that they will turn quite freely in the forward direction, but will not be turned backwards by a pressurized backflow. The impeller rotation that is introduced via the spindle shafts (31) nevertheless leads to a volume displacement towards the high-pressure side, for instance, towards a chamber to be pressurized or to be subjected to equal pressure.
IPC 8 full level
F04C 2/16 (2006.01); F01C 11/00 (2006.01); F04C 2/08 (2006.01); F04C 18/08 (2006.01); F04C 18/16 (2006.01)
CPC (source: EP)
F01C 11/006 (2013.01); F01C 11/008 (2013.01); F04C 2/084 (2013.01); F04C 2/16 (2013.01); F04C 18/084 (2013.01); F04C 18/16 (2013.01); F04C 2270/01 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 03019009 A1 20030306; AT E377709 T1 20071115; DE 60223388 D1 20071220; DE 60223388 T2 20080828; EP 1421282 A1 20040526; EP 1421282 A4 20050309; EP 1421282 B1 20071107; ES 2295340 T3 20080416
DOCDB simple family (application)
US 0209986 W 20020328; AT 02728628 T 20020328; DE 60223388 T 20020328; EP 02728628 A 20020328; ES 02728628 T 20020328