SYSTEME DE POMPE PRODUISANT UN ECOULEMENT PULSE

A pumping system wherein liquid is required to be heated to a certain temperature and supplied as a pulsed flow of variable stroke volume and frequency. The pumping system is of special use for pumping blood in heart assist systems. A second liquid is used for the heat exchange and for imparting the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PNUELI DAVID, RAHAT SHMUEL, URETZKY FIDEON, SONDAK EHUD, BORMAN JOSEPH B, ROTTENBERG DAN
Format:	Patent
Sprache:	fre
Schlagworte:	BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY HEAT EXCHANGE IN GENERAL HEATING HUMAN NECESSITIES HYGIENE LIGHTING MECHANICAL ENGINEERING MEDICAL OR VETERINARY SCIENCE POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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Beschreibung
Zusammenfassung:	A pumping system wherein liquid is required to be heated to a certain temperature and supplied as a pulsed flow of variable stroke volume and frequency. The pumping system is of special use for pumping blood in heart assist systems. A second liquid is used for the heat exchange and for imparting the pulsed flow. Chambers (13, 23) and a heat exchanger (16) therebetween are filled with the second liquid which is warmed by a heating element (24). Pulses are applied to the second liquid by a liquid column (28) acting via a membrane (26) to cause flow to-and-fro between the chambers (13, 23) under the control of valves (18, 22). The second liquid entering and leaving the chamber (23) acts on a second membrane (14), the movement of the latter pumping the first liquid around a circuit (12, 29-36) including the heat exchanger (16).