EP 2634426 B1 20140514 - Two-stage pump
Title (en)
Two-stage pump
Title (de)
Zweistufenpumpe
Title (fr)
Pompe à deux étages
Publication
Application
Priority
EP 12157913 A 20120302
Abstract (en)
[origin: EP2634426A1] The pump (P) has a high-pressure and low-pressure pumping element (H,N) for small and high flow rate, and common pressure outlet (2). A switching valve (9) arranged between low-pressure pumping element and tank is opened to tank dependent on pressure in discharge outlet, such that piston pump elements of two pumping elements are equipped with suction and pressure valves (4,5). A common housing is shared by suction and discharge valves and changeover valve (9), so that piston (16,17) is divided into separate high-pressure and low-pressure delivery spaces (3,6).
IPC 8 full level
F04B 3/00 (2006.01); F04B 1/02 (2006.01); F04B 25/00 (2006.01)
CPC (source: EP)
F04B 1/02 (2013.01); F04B 3/00 (2013.01); F04B 25/005 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 12157913 A 20120302