Pump arrangement for medical purposes

摘要: Pump arrangement (10) for medical purposes, in particular blood or infusion pump, comprising a pump housing (12) having two chambers (16, 18), of which the work chamber (16) is subjected to liquid be pumped while drive (18) connected via connecting conduit pneumatic (14) restricted pumping volume. This (50) comprises valve (56) opened at respective changeover point (top and bottom dead-center) set entire atmospheric pressure.