EP 1363025 B1 20110706 - Variable capacity pump
Title (en)
Variable capacity pump
Title (de)
Verdrängerpumpe mit Fördervolumenverstellung
Title (fr)
Pompe à capacité variable
Publication
Application
Priority
DE 10222131 A 20020517
Abstract (en)
[origin: EP1363025A2] The casing (3) contains a gear pump with two wheels (1,2). These have adjustable engagement, to vary the quantity of fluid pumped from inlet (5) to outlet (6). A piston (8) coupled to at least one of the wheels, makes the adjustment. Piston chambers (9,10) are subjected to pressures (P9, P10), which act on the piston, through connections (11,12) with the high pressure side. A spring in the first piston chamber (9) acts on the piston, against fluid pressure (P9). A controller (15) adjusts the pressure in the second chamber (10), in accordance with a control magnitude (PR) which sets the rate of delivery.
IPC 8 full level
F04C 2/10 (2006.01); F04C 14/10 (2006.01); F04C 14/18 (2006.01); F04C 2/14 (2006.01); F04C 2/18 (2006.01)
CPC (source: EP)
F04C 14/10 (2013.01); F04C 14/185 (2013.01); F04C 2/102 (2013.01); F04C 2/14 (2013.01); F04C 2/18 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1363025 A2 20031119; EP 1363025 A3 20060419; EP 1363025 B1 20110706; AT E515636 T1 20110715; DE 10222131 A1 20031204; DE 10222131 B4 20050512; DE 10222131 C5 20110811; ES 2367969 T3 20111111
DOCDB simple family (application)
EP 03011033 A 20030519; AT 03011033 T 20030519; DE 10222131 A 20020517; ES 03011033 T 20030519