EP 1984626 A2 20081029 - FLOW RESTRICTING DEVICES IN PUMPS
Title (en)
FLOW RESTRICTING DEVICES IN PUMPS
Title (de)
STRÖMUNGSBEGRENZUNGSVORRICHTUNGEN FÜR PUMPEN
Title (fr)
DISPOSITIFS RÉDUCTEURS DE DÉBIT POUR POMPES
Publication
Application
Priority
- US 2007061130 W 20070126
- US 34099406 A 20060126
Abstract (en)
[origin: US2007172367A1] Restriction of flow along a shaft by interposing a split ring in the annulus between the shaft and housing. When the ends of the split ring are separated, the effective diameter of the ring is increased and a clearance between the ID of the split ring and the shaft is maintained permitting flow. When the ends are released and allowed to come together the split ring closes the annular gap and restricts the flow. Also contemplated is the restriction of flow along a shaft by interposing an axially movable sleeve in the annulus between the shaft and housing. Flow through the annulus between the movable sleeve and the shaft is resisted by the clearance or features such as labyrinths, to thereby create a differential pressure from one end of the sleeve to the other.
IPC 8 full level
F04B 17/00 (2006.01)
CPC (source: EP US)
F04D 15/00 (2013.01 - EP US); F04D 29/106 (2013.01 - EP US); F04D 29/126 (2013.01 - EP US); F16J 15/164 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
US 2007172367 A1 20070726; EP 1984626 A2 20081029; JP 2009524776 A 20090702; WO 2008030630 A2 20080313; WO 2008030630 A3 20081127
DOCDB simple family (application)
US 34099406 A 20060126; EP 07853468 A 20070126; JP 2008552592 A 20070126; US 2007061130 W 20070126